EP3788660A1 - Bloc d'accumulateurs - Google Patents

Bloc d'accumulateurs

Info

Publication number
EP3788660A1
EP3788660A1 EP19718274.4A EP19718274A EP3788660A1 EP 3788660 A1 EP3788660 A1 EP 3788660A1 EP 19718274 A EP19718274 A EP 19718274A EP 3788660 A1 EP3788660 A1 EP 3788660A1
Authority
EP
European Patent Office
Prior art keywords
electrical contact
battery pack
contact device
cell
electrical
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.)
Pending
Application number
EP19718274.4A
Other languages
German (de)
English (en)
Inventor
Florian Schmehl
Marc-Alexandre Seibert
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 EP3788660A1 publication Critical patent/EP3788660A1/fr
Pending 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
    • H01M50/20—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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • 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
    • H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0044—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction specially adapted for holding portable devices containing batteries
    • 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
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • 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 document DE 20 2009 002 787 Ul discloses a replaceable Ak kupack for a hand tool, with only a lithium-ion battery cell is used, which is housed in a housing.
  • the invention relates to a battery pack, in particular an electrical Maisvor direction for a battery pack, comprising a cell connector through which the elec- tric contact device is electrically connected to a battery cell, an electrical contact through which the electrical contact device with a consumer and / or loader is connectable, and a Flachverbin the electrical and mechanical connection of the cell connector with the electrical contact, wherein the cell connector in a first Vietnamesesbe is materially connected materially connected to the flat connector and the flat connector is connected in a second connection area cohesively with the electrical contact. It is proposed that at least one cohesive Ver bond, in particular all cohesive compounds, via a welding process.
  • a battery pack with a particularly high glossfä ability can be realized on the inventive electrical cal contact device.
  • the battery pack preferably has a battery pack housing, which is detachably connectable via a mechanical interface African with the consumer and / or the charging device.
  • the battery pack is preferably out forms as a Konakkupack.
  • the consumer may, in particular, as a gardening tool, such as a lawnmower or a hedge trimmer, as a household appliance, such as an electric window cleaner or hand vacuum cleaner, as a hand tool, such as an angle grinder, a screwdriver, a drill, a hammer drill, etc. or as a measuring tool, such as in a laser rangefinder, be formed.
  • the consumer is designed as another especially portable Ge advises, such as a construction site lighting, a suction device or a construction site radio.
  • the mechanical interface of the battery pack is non-positively and / or positively connected to the consumer.
  • the mechanical interface comprises at least one actuating element, via which the connection of the battery pack with the consumer and / or with the charging device is detachable.
  • the battery pack has at least one electrical interface via which the battery pack can be electrically connected to the load and / or to the charging device.
  • the battery pack can be charged and / or discharged via the electrical connection, for example.
  • information can be transmitted via the electrical interface.
  • the electrical interface is preferably formed as a contact interface, in which the electrical connection via a physical contact of at least two conductive component takes place.
  • the electrical interface preferably comprises at least two electrical contacts.
  • the electrical contacts is designed as a positive contact and the other electrical contact as a negative contact.
  • the electrical interface may have a secondary charging coil element for inductive charging.
  • the at least one battery cell is arranged in the battery pack housing of the battery pack, which device via the electrical Maisvorrich is electrically connected to the consumer.
  • the battery cell may be formed as a galvanic cell having a structure in which a 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.
  • the battery cells as NiCd or NiMh-, especially preferably as lithium-based battery cells or Li-ion battery cells, abandonedbil det.
  • the battery voltage of the battery cell is usually a multiple of the voltage of a single battery cell and results from the circuit (paral lel or serial) of the battery cells. With standard battery cells with a voltage of 3.6 V, this results in exemplary battery voltage of 3.6 V, 7.2 V, 10, 8 V, 14.4 V, 18 V, 36 V, 54 V, 108 V etc
  • the battery cell is designed as an at least substantially cylindrical round cell, wherein the cell poles are arranged at ends of the cylindrical shape.
  • the electrical interface may have at least one additional contact which is designed to transmit additional information to the consumer and / or the charging device.
  • the battery pack has electronics, wherein the electronics may include a memory unit on which the information is stored from.
  • the information is determined by the electronics.
  • the information may be, for example, a state of charge of the battery pack, a temperature within the battery pack, a coding or a residual capacity of the battery pack.
  • the electronics is designed to regulate the La de- and / or discharge of the battery pack or control.
  • the electronics may comprise, for example, a printed circuit board, a computing unit, a control unit, a transistor, a capacitor, and / or the memory unit.
  • the electronics may also have one or more sensor elements, for example, a temperature sensor for determining the temperature within the battery pack.
  • the electronics may alternatively or additionally comprise a coding element, such as a coding resistor.
  • the electrical contact device is in particular designed to electrically connect the battery cell to a consumer.
  • the cell connector is formed in particular for electrical connection of the electrical contact device to the battery cell.
  • a single cell connector is materially connected to a single cell pole of the battery cell.
  • the battery pack may also have a cell connector, which is materially connected to more than one battery cell, for example, two battery cells.
  • the cohesive connection of the battery cell with the cell connector is preferably carried out via a welding process, such as a resistance stand welding or a laser welding process.
  • the electrical contact or the electrical contacts of the battery pack are in particular special for non-positive and / or positive connection with a korrespondie-generating contact element, which is assigned to the consumer or the charging device, formed.
  • the flat connector is preferably made of a metal sheet metal element, preferably from a stamped grid formed.
  • a binding region is to be understood in particular as meaning a region in which two materials are bonded to one another, in particular by material bonding.
  • the materials are in the connec tion area to each other.
  • the two materials are essentially electrically connected to one another via the connection region.
  • a welding method is to be understood in the context of this application, a United drive, in which two workpieces cohesively with each other with partial melting at least one of the two workpieces are the.
  • the electrical contact device is advantageous over a
  • the first and the second Vietnamesesbe are arranged rich at opposite ends of the flat connector.
  • a compact battery pack can be realized by this arrangement.
  • connection areas are spaced apart by at least 70% of the length of the flat connector, preferably at least 85% of the length of the flat connector.
  • the first and the second connection region are arranged on opposite end-side ends of the flat connector.
  • the cell connector and the flat connector consist of the same material, in particular a copper alloy or pure copper.
  • a "same material” is to be understood in particular an identi cal material or an identical material.
  • the copper alloy has a copper content of at least 70%, preferably at least 85%.
  • the copper alloy may be exemplified as copper-tin alloy, copper-zinc alloy, copper-nickel alloy, etc. Alternative materials such as CuZrCr and CuCrSiTi are also conceivable.
  • the pure copper is preferably formed as oxygen with copper Cu-ETP with a copper content of over 99.9% or as OFC copper fer or oxygen-free copper with a purity of over 99.99%.
  • the flat connector and the electrical contact made of different materials.
  • the material of which the flat connector is made has a higher electrical conductivity than the material of which the electrical contact is made.
  • the material of which the flat connector is made has a higher modulus of elasticity and / or a higher yield strength than the material of which the electrical contact is made.
  • the flat connector can be optimized in terms of its electrical conductivity and the electrical contact with respect to its mechanical properties.
  • a thickness of the flat connector in the first connection region is greater than a thickness of the cell connector in the first connection region.
  • the thickness of the flat connector corresponds at least to 1.5 times the thickness of the cell connector, preferably at least 2 times the thickness of the cell connector, preferably at least 3 times the thickness of the cell connector.
  • a thickness of the electrical contact in the second connection region is greater than a thickness of the flat connector.
  • the thickness of the electrical contact equal to at least 1.5 times the thickness of the flat connector.
  • the electrical contact device has at least one connection means which is designed to connect the flat connector from the cell connector or the electrical contact from the flat connector. Partially adjacent to the connection area.
  • the connecting means is preferably arranged in the connection area.
  • the connection medium forms the connection area.
  • the connecting means is formed point-shaped We sentlichen, so that the flat connector on the Zellver binder or on the electrical contact substantially punctiform.
  • the connecting means may be formed, for example, as an embossed in the material dimple.
  • the dimple is designed in such a way that a defined melting during the welding process can be carried out. Vorzugswei se, the dimple has a defined cross section, which is smaller than the cross section of the material in which the dimple is formed.
  • the connecting means is formed integrally with the electrical contact device.
  • a cost-effective electrical contact device can be realized thereby.
  • the connection means is produced via a forming process of a portion of the electrical contact device.
  • a pressure forming, a Ceiettaumformen or a Switzerlandumformen Preferably by a pressure forming, a Ceillumformen or a Ceiumformen.
  • a width of the connecting means at most 50% of the width of the adjacent electrical contact device, in particular special not more than 30% of the width of the adjacent electricalmaschinevor direction, preferably at most 15% of the width of the adjacent electrical contact device corresponds.
  • the welding process can thereby be further optimized.
  • the components of the contact device should be under the angren Zenden electrical contact device were ver, which are partially spaced from the connecting means.
  • a material thickness in the region of the connec tion medium is reduced, in particular reduced by at least 10%, vorzugswei se reduced by at least 20% is.
  • the invention relates to a single-cell battery pack, in particular hand tool machine battery pack, with an electrical contact device as described above, wherein the battery pack has an output of more than 120 W, in particular of over 140 W.
  • this can be a both compact as well as powerful system can be realized from the unicellular battery pack and a consumer.
  • Under a single-cell battery pack is to be understood in particular a battery pack with a battery pack housing, in which only a single battery cell is added.
  • the invention relates to a method for producing an electrical contact device having at least two, preferably three, electrically conductive components, the method comprising a method step in which the components are connected to one another via a resistance welding method and / or a laser welding method. Furthermore, it is proposed that in a further method step, a component of the electrical contact device is deformed by the action of force to produce a connection means.
  • the invention relates to a battery pack, in particular a craft zeugmaschinenakkupack, with a battery cell having a first electrical interface and a second electrical interface, wherein the battery pack is discharged via the first electrical interface and rechargeable via the second electrical interface.
  • the cut points are arranged separately from each other on the battery pack.
  • a particularly practical battery pack can thereby be realized, which can be loaded and unloaded as an example at the same time.
  • the first electrical interface and the second electrical interface are in particular designed differently.
  • the first electrical interface and the second electrical interface are not compatible, in particular not pin-compatible.
  • only the first electrical interface is connectable to the consumer and only the second electrical interface can be connected to a charging device.
  • both electrical interface only with different Ladevorrich lines are connected and only one of the interfaces with the consumer is ver bindable.
  • the different charging devices are preferably two charging devices, which differ in the charging speed of the battery pack.
  • discharged via the first and the second electrical interface of the battery pack both from can be.
  • neither the first electrical interface nor the second electrical interface is provided for inductive charging.
  • the first electrical interface has at least two electrical contacts, in particular at least two spring contacts, which are preferably arranged next to the battery cell.
  • the electrical contacts may be ordered to an electrical contact device as described previously.
  • Under two electrical contacts, which are arranged next to the battery cell should be understood in particular a spatial arrangement of the electrical contacts, in which a plane to the longitudinal extent of the battery cells normal or perpendicular, both the battery cell and the electrical contacts intersects.
  • the plane completely intersects the electrical contacts in the region in which the electrical contacts make a connection to corresponding electrical contacts, for example a consumer.
  • the first interface and / or the second interface is arranged next to the battery cell.
  • both the electrical contact elements and the additional contacts are arranged next to the battery cell.
  • the first electrical interface has at least one additional contact.
  • the additional contact may be exemplified as a coding contact for a charging device, a Kodiertitle for a consumer or as a tempera turcard for transmitting temperature information of the battery pack out forms.
  • the second electrical interface has a USB connection, in particular a USB type-c connection or a USB micro-B connection.
  • the battery pack can be charged very conveniently via a standardized connection.
  • the battery pack comprises electronics with a printed circuit board, wherein the first and / or the second electrical interface are at least partially disposed on the circuit board.
  • the two electrical contacts are arranged partially between the Lei terplatte and the battery cell.
  • a longitudinal extent of the electronics is substantially parallel to a longitudinal extent of the battery cell.
  • the length of the battery pack can be kept particularly small.
  • the longitudinal extension of the battery cell essentially ent speaks the insertion direction of the battery pack in the consumer.
  • the battery pack can be detachably fastened to a handheld power tool via a mechanical interface, wherein charging of the battery pack, in particular only via the second electrical interface, is possible in the fastened state.
  • charging of the battery pack in particular only via the second electrical interface, is possible in the fastened state.
  • this always a power supply of the power tool can be guaranteed.
  • Under a lös ble attachment should be understood in this context, in particular a tool los releasable attachment.
  • the battery pack has a temperature sensor which is clamped between the electronics and the battery cell, in particular an electronics carrier made of plastic and the battery cell.
  • a temperature sensor which is clamped between the electronics and the battery cell, in particular an electronics carrier made of plastic and the battery cell.
  • this allows a simple assembly and at the same time an accurate determination of the temperature of the battery pack in the region of the battery cell.
  • the battery pack has a plurality of temperature sensors in order to improve the determination of the temperature by means of redundancy.
  • the invention relates to a method for assembling a battery pack, wherein the following steps are carried out in the order mentioned: Connection, in particular non-positive and / or positive connection, a Ers th mounting module with a second mounting module, wherein the first Monta gemodul a first electrical interface, a second electrical interface and a temperature sensor on a printed circuit board electronics has, and the second mounting module at least one Part of an electrical Kunststoffvorrich device on an electronics carrier comprises;
  • the assembly method additionally comprises the following step:
  • the assembly process additionally comprises the following steps:
  • the invention relates to a battery pack, in particular a craft compaction machine battery pack, with a battery pack housing in which a Batteriezel le and electronics are added.
  • the electronics have a control unit, a motion sensor and in particular a single light-emitting element, the control unit being designed to control the light-emitting element based on a signal detected by the motion sensor in order to signal a charge state.
  • the state of charge of the battery pack can thereby be displayed in a particularly convenient way.
  • the motion sensor no manually operable control element for the light element necessary.
  • the STEU erö for controlling in particular for controlling the lighting element, is formed.
  • the motion sensor is in particular configured to convert a change in position of the battery pack into an electrical variable and thus to determine a signal based on the change in position.
  • the control unit comprises at least one Re chentician, such as a microprocessor, via which the signal of the Be wegungssensors is evaluable.
  • the Steuerein unit is designed analogously and includes at least one comparator by way of example.
  • both the control unit and the motion sensor are designed analogously.
  • the luminous element may be formed as a monochrome luminous element or as a luminous element, in particular the luminous element has at least one light-emitting diode.
  • the lighting system preferably has at least two light-emitting diodes.
  • the lighting system preferably has one light-emitting diode per color displayed.
  • the luminous element is designed as a more colored LED.
  • the motion sensor is designed as an acceleration sensor.
  • the motion sensor can be designed in particular as a piezoe lektrischer acceleration sensor.
  • the acceleration sensor is designed as a MEMS component.
  • the acceleration sensor may in particular be designed to measure a linear acceleration along at least one axis, preferably along three axes.
  • the acceleration sensor may be designed to measure an angular velocity. It is likewise conceivable for the battery pack to have more than one motion sensor, for example to optimize one for measuring a linear acceleration and one for measuring an angular velocity about the detection of the signal.
  • the lighting element is designed to light in different colors.
  • the luminous element is adapted to illuminate in three colors, the three colors being red, yellow and green.
  • the luminous element is designed to illuminate in two colors, the two colors being red and green.
  • blue would also be conceivable.
  • the intensity of the brightness of the active light emitting element is varied. The variation can exemplarily linear or exponential suc conditions.
  • the luminous element is designed to light continuously and / or flashing.
  • the display to the user can be further improved.
  • the light-emitting element may be partially designed to be glaring, being designed to be partially flashing, meaning that the light-emitting element does not flash in at least one color.
  • the light-emitting element is in particular designed to display a status of the state of charge of the battery pack. The status can be determined by the control unit based on the signal of the motion sensor. The status can be 100% charged, for example, battery pack 0% charged or battery pack charged.
  • a higher number of statuses than displayed colors can be realized by the combination of luminous and flashing colors.
  • the electronics comprise a printed circuit board, which is connected in particular with electrical contacts, wherein the lighting element and the motion sensor are arranged on the circuit board.
  • the motion sensor and the light-emitting element are designed as surface-mounted components.
  • control unit is designed to activate the light-emitting element when detecting a movement of the battery pack.
  • control unit is designed to activate the luminous element for a predetermined time, which is particularly dependent on the state of charge.
  • the control unit is adapted to the lighting element at an explicable first status corresponding to a higher state of charge than an explicable second state, activating the luminous element for a longer period of time than the second state.
  • control unit is designed to switch off the lighting element when the battery pack is discharged.
  • a reliable indication of the charging state is always guaranteed.
  • the operation of the consumer such as screws with a screwdriver or grinding with a grinder ver be stood.
  • the battery pack flow high currents causing the voltage drops and thereby a significantly too low state of charge is determined.
  • the battery housing has an optical waveguide, wherein the optical waveguide is configured to direct the light emanating from the luminous element to the outside, in particular to bundle it.
  • the light generated by the luminous element can thereby be efficiently led out of the interior of the battery pack housing to the outside.
  • the light guide is formed in particular transparent.
  • the light guide preferably has a light-collecting surface, which is arranged facing the light-emitting element, and a light-emitting surface, which is arranged on the outer surface of the battery pack.
  • the light-collecting surface may be arranged directly adjacent to the luminous element or adjacent to the luminous element.
  • the size of the light-collecting surface substantially corresponds to the size of the luminous element or the area over which the luminous element emits light.
  • the light-emitting surface preferably has a different geometric shape than the light-collecting surface.
  • the light-emitting surface may be substantially the same size as the light-collecting surface.
  • the Lichtab beam surface is smaller than the light-collecting surface to produce a higher light intensity.
  • the light guide is at least two stages out forms, wherein at least one stage is sealed by a sealing element.
  • the battery pack can be effectively protected from liquid or moisture.
  • a two-stage light guide has a first and a second light guide on, wherein the light guide elements are connected to each other such that light can pass from the first light guide into the second light guide.
  • the light-guiding elements may be non-positively and / or positively or materially connected to each other.
  • the first light-guiding element bears against the second light-guiding element or a small gap is arranged between the two light-guiding elements.
  • the invention relates to a system comprising a consumer and a battery pack, wherein the consumer is detachably connectable to the battery pack, the battery pack has a first and a second electrical interface, with a sealing device for sealing the system against dust and / or or liquids.
  • the sealing device comprises a first sealing unit and a second sealing unit, which are arranged between the first and the second electrical interface.
  • the sealing device may be associated with the consumer and / or the battery pack.
  • the sealing device is in particular designed such that the system of consumer and battery pack an IP protection class of at least IPX3, preferably of at least IPX4 and thus protection against spray (direction does not matter), ent speaks.
  • the first sealing unit is designed to seal the first electrical interface.
  • the sealing of the first interface can be ensured thereby.
  • the first sealing unit is disposed between tween the first electrical interface and a housing opening of the system. Under a housing opening of the system should in particular a Publ voltage or a gap are understood, which is arranged in the connected state of the consumer chers with the battery pack between the battery pack housing and a housing of the consumer.
  • the first sealing unit between the battery pack housing of the battery pack and the housing of the consumer is arranged.
  • the seal can be further improved.
  • the first sealing unit be a two-part sealing element. has ment, which is received positively and / or positively by two housing shells of the Ge housing.
  • a cheap and easy to install first sealing unit can be realized thereby.
  • the sealing element is produced by a multi-component injection molding method, in particular a two-component injection molding method, wherein a radially inner part of the sealing element is made more elastic than a radially outer part of the sealing element.
  • a resilient as well as mechanical stable sealing element can be realized thereby.
  • the second sealing unit is designed to seal the battery pack housing.
  • the second sealing unit between the second electrical interface and the housing opening of the system is arranged.
  • the battery pack housing is formed at least in two parts, wherein the second sealing unit disposed between a battery pack base body and a battery pack cap.
  • the battery pack can be effectively sealed between its housing parts.
  • the Akkupackgrund stresses he stretches, in particular in its length parallel to the longitudinal extent of the recorded in him battery cells.
  • the battery pack main body and the battery pack cap are in particular non-positively and / or positively connected with each other. In the state connected to the consumer, the battery pack main body is in particular essentially enclosed by the housing of the consumer.
  • the second sealing unit comprises a sealing ring.
  • a simple assembly and a low-cost sealing unit can be realized thereby.
  • the battery pack housing has one or more openings, wherein all openings are closed by a respective closure element and sealed by a respective further sealing element.
  • a substantially splash-proof battery pack can be reali Siert. In the unconnected state, all openings of the battery are preferably packs protected from water ingress except for the first electrical interface.
  • the invention relates to a battery pack for a hand tool with a sealing device as described above or a consumer, in particular a hand tool, with a first sealing unit as described above ben.
  • the invention relates to a battery pack, in particular a hand tool maschinenakkupack, with a battery pack housing, wherein the battery pack ei ne a mechanical interface comprehensive battery pack cap for releasably connec tion of the battery pack housing to a consumer, wherein the mechanical interface has at least one resilient latching element.
  • the battery pack cap has an inner housing part and an outer housing part, wherein on the inner housing part, the locking element is arranged and on the outer housing part, an operating element is arranged.
  • the operating element is designed for actuating the latching element, so that the latching element can be brought into and / or disengaged via a force acting on the operating element. Due to the design of the Qualcommele element and the locking element in different housing parts can be advantageously achieved that the control is optimally adapted for a user and the locking element is designed for optimal connection.
  • the inner housing part comprises the mechanical interface and the outer housing part covers at least one gap of the inner housing part.
  • the system can be effectively protected from a consumer and a battery pack in the connected state against egg nen entry of dust and liquids.
  • the mechanical interface is formed in particular to a force and / or formschlüssi gene connection.
  • the mechanical interface preferably has means associated with the battery pack and means associated with the consumer.
  • the resilient latching element is in particular out forms as a resilient latching arm.
  • the resilient latching arm is preferably formed integrally with the inner housing part.
  • the outer housing part is arranged relative to the inner housing part in particular radially to the longitudinal extent outside.
  • the outer housing part is formed as an outer housing.
  • the inner housing part is not arranged on the outer surface of the Akkukap pe.
  • the gap is formed adjacent to the latching element.
  • the elastic properties of the latching arm can be optimally adjusted through the gap.
  • two columns are arranged adjacent to each latching arm of the me chanical interface.
  • the gap is arranged in the circumferential direction between two latching arms.
  • the gap extends substantially parallel to a longitudinal extent of the battery pack.
  • the longitudinal extent of the battery pack is formed parallel to a plug-in direction or insertion direction of the battery pack in the connection process with the consumer.
  • the longitudinal extension of the battery pack substantially corresponds to the longitudinal extension of the battery cells.
  • a length of the latching arm may substantially correspond to a length of the gap. However, it is also conceivable that the length of the latching arm is greater than the length of the gap.
  • the inner housing part Rich a advocatesbe and a coupling region comprises, wherein the operating area is in particular completely constantly covered by the outer housing part.
  • a Consbe rich in particular a region of the inner housing part is to be understood, which is deformed under the action of force and / or bent so that the latching arm is moved.
  • the operating area is arranged such that it is operable both in the state connected to the consumer and in the unconnected.
  • the battery pack connected to the consumer via a force on the operating area of the consumer tool-free solvable.
  • the coupling region is formed in particular for producing the positive and / or positive connection with a corresponding means of the consumer.
  • the coupling region is in particular connected to the consumer state enclosed by the housing of the consumer.
  • the coupling region is free of the outer housing part.
  • the operating element is arranged in the operating area.
  • the operating area is formed by the operating element.
  • the inner housing part and the outer housing part are made of different materials.
  • the inner housing part of a hard plastic and the outer part is formed of a soft plastic.
  • the inner housing part has a higher elastic modulus than the outer housing part. Due to the stiffer inner housing part, a secure connection Ver can be ensured via the locking arm. Due to the softer external housing, an improved user interaction can advantageously be realized, since the battery pack cap can be gripped more securely by the softer material. For this, the battery pack by the softer material of the outer housing partly advantageous improved elastic properties, which can absorb the energy acting on the battery pack energy in the event of a fall.
  • a ratio of a material thickness of the inner housing part and a material thickness of the outer housing part on average does not exceed a value of substantially 3, in particular an average value of substantially 2, preferably a value of substantially 1.
  • the advantages of the individual housing parts can be optimally utilized in this area.
  • the material thickness of the inner housing part is greater than the material thickness of the outer housing part.
  • the outer housing part has an operating means.
  • the operating means is designed as an outer surface of the operating element.
  • it facilitates the operation of the battery pack by the operating means.
  • the operating means may be formed integrally with the outer housing part.
  • the operating means may be formed as a surface modification of the langelie ing housing part.
  • the operating means is arranged above the operating region of the inner housing part.
  • the surface modification may include, for example, ribs and / or nubs that extend inwardly or outwardly.
  • the invention relates to a method for producing a battery pack cap as described above, wherein the battery pack cap via a multi-component injection molding process, in particular a two-component injection molding process, will be produced.
  • a cost-effective Her position of the battery pack cap can be realized.
  • Fig. 1 is a side view of a system with a consumer and egg nem battery pack
  • FIG. 2 is a perspective view of the battery pack according to FIG. 1;
  • FIG. 2 is a perspective view of the battery pack according to FIG. 1;
  • FIG. 3a shows a perspective view of an electrical contact device and a battery cell of the battery pack according to FIG. 2;
  • Fig. 3b is a side section through the electrical contact device according to
  • 3c shows a cross section through the electrical contact device according to FIG.
  • Fig. 4 is a cross-section of an alternative embodiment of an electrical contact device
  • Fig. 5a is a perspective view of a first mounting module
  • 5b is a perspective view of a second mounting module
  • 5c is a perspective view of the first mounting module connected to the second mounting module and the battery cell;
  • Fig. 6 is a longitudinal partial section through the system of FIG. 1;
  • Fig. 7 is a perspective view of a light guide;
  • FIG. 8 is a perspective view of a first sealing unit
  • FIG. 9 is a perspective view of a battery pack cap.
  • FIG. 1 an inventive system of a consumer 10 and egg nem battery pack 100 is shown.
  • the consumer 10 is exemplified as a hand tool machine 12, in particular as a screwdriver formed.
  • the hand tool machine 12 has a housing 14, which comprises at least a first Ge housing shell 16 and a second housing shell 18.
  • the two hous seschalen 16, 18 may be connected to each other by way of example via a screw.
  • an electric motor having a drive unit 20 is arranged in the housing 14 of the power tool 12.
  • the drive unit 20 is in particular coupled via a gear unit with a tool holder 22 GE.
  • the tool holder 22 is adapted to receive an unillustrated insert tool such that a drive movement, starting from the drive unit 20 is transferable to the insert tool.
  • the hand tool machine 12 also has an operating switch 24 for switching on and off the hand tool 12 and the drive unit 20 on.
  • the operating switch 24 is disposed on a handle 26 which extends obliquely to egg ner working axis 28.
  • a working axis is to be understood as meaning, in particular, an axis about which or along which the insertion tool is driven during operation.
  • the handle 26 extends obliquely to the working axis 28.
  • the working axis 28 and the longitudinal axis 29 of the handle 26 form an angle of more than 90 °.
  • At the drive unit 20 and the tool holder 22 is disposed at the upper end of the handle 26.
  • a Akkupackauf measure 30 is arranged, which is provided for receiving the battery pack 100.
  • the battery pack 100 is partially, in particular for the most part, added to the handle 26.
  • the battery pack receptacle 30 comprises two latching pockets 32 and ei ne electrical interface 34th
  • the battery pack 100 is in particular designed as a Einsteckakkupack that is partially received in the connected to the power tool 12 state in the battery pack receptacle 30 of the power tool 12.
  • the battery pack 100 is designed as Konakkupack.
  • Fig. 2 the Ak kupack 100 is shown in a perspective view.
  • the battery pack 100 is for Power supply of the consumer 10 and the hand tool 12 is provided.
  • the battery pack 100 is partially enclosed by the housing 14 of the power tool 12. In the area in which the battery pack 100 is enclosed by the housing 14, the battery pack 100 is completely enclosed before preferably in the circumferential direction.
  • the battery pack 100 is designed as a handheld power tool battery pack.
  • the battery pack 100 has a battery pack housing 102, which is designed in several parts.
  • the Akkupackge housing 102 has a cup-shaped battery pack body 104 and a battery pack cap 106.
  • the battery pack cap 106 closes the Ak kupackgrund Sciences 104.
  • the battery pack 100 has a first electrical interface 108, which is adapted to electrically connect the battery pack 100 with the power tool 12, in particular with the electrical interface 34 of the power tool 12.
  • the first electrical interface 108 is arranged at a first end of the battery pack 100.
  • the first electrical interface 108 is completely accommodated in the housing 14 of the handheld power tool 12 in the state associated with the handheld power tool 12.
  • the battery pack 100 also has a second electrical interface 110 (see Fig. 5a).
  • the second electrical interface 110 is in particular special for connection to a charging device, not shown remplibil det.
  • the electrical interface 110 to connect directly to the Ladevorrich device or alternatively via a cable connection.
  • the second electrical interface 110 is arranged at a second end of the battery pack 100, which is opposite to the first end.
  • the battery pack 100 has a La de gleichsan Seae 112, via the state of charge of the battery pack 100 can be displayed.
  • the charge status indicator 112 is attached to the battery pack cap 106 is arranged.
  • the charge status indicator 112 is preferably arranged on a side of the battery pack 100 facing away from the tool holder.
  • the battery pack 100 further includes a mechanical interface 114, which is for releasable loading fastening of the battery pack 100 formed on the power tool 12.
  • the mechanical interface 114 comprises two latching elements 116 designed as resilient latching arms 116 which extend in the direction of the hand tooling machine 12.
  • the latching arms 116 are for non-positive and positive connec tion in the latching pockets 32 of the power tool 12 receivable.
  • the battery pack 100 includes a single battery cell 118, the housing 102 is arranged in the Akkupackge.
  • FIG. 3 a shows a perspective view of an electrical contact device 120 and a battery cell 118.
  • the electrical Grevor device 120 and the battery cell 118 is shown in a longitudinal section.
  • the Batte riezelle 118 has two cell poles 122, which are arranged on the front side.
  • the electric contact device 120 has two cell connectors 124, which are formed out, an electrical connection between the electrical Maisvor device 120 and the battery cell 118, in particular one of the cell poles 122 of the battery cell 118 to produce. Furthermore, the electrical Maisvor device 120 has two flat connectors 126 which are adapted to connect the Zellver binder 124 each having an electrical contact 128. Alternatively, it is also conceivable that the electrical contact device 120 has only one cell connector 124 each, a flat connector 126 and an electrical contact 128. The electrical contacts 128 are formed as spring plate contacts. To provide a powerful consumer 10 such as the power tool 12 with a single-cell battery pack 100 with sufficient power is a powerful battery cell 118 is necessary.
  • the electrical contact device 120 which electrically connects the battery cell 118 to the load 10 or the electrical interface 34 of the hand tool 12 corresponds to the requirement of such high currents. For this reason, 120 is dispensed with solder joints in the connection of the individual components of the electrical contact device.
  • the cell connectors 124 are rich connected to the flat connectors 126 in each case a first Paarsbe 130 via a welded connection.
  • the welding connection preferably takes place via a resistance welding method, but it is also conceivable that the welded connection is produced by means of a laser welding method.
  • the electrical contacts 128 are connected to the flat connectors 126 via a respective second connecting region 132 in a materially coherent manner via a welded connection.
  • the cell connectors 124 and the flat connectors 126 are made of ultra-pure copper to ensure a very high conductivity.
  • the cell connectors 124 have a thickness of about 0.1 mm and the flat connectors 126 have a thickness of 0.3 mm.
  • the electrical contacts 128 are made of a Copper alloy formed, which has both a high conductivity and a certain elasticity.
  • the electrical contacts 128 have a thickness of 0.5 mm.
  • the conductivity of the material of the flat connector 126 and the cell connectors 124 is greater than the conductivity of the material of the electrical contacts 128.
  • the flat connector 126 is in the first connection region 130 via a connecting means 134 to the cell connector 124 at.
  • the flat connector 126 and the cell connector are, with regard to the longitudinal extent of the battery pack 10, in particular overlappingly arranged.
  • overlapping angeordnef be understood in this special particular that a plane in which the longitudinal extension of the battery pack 10 forms the normal, both the flat connector 126 and the cell connector 124 intersects.
  • the connecting means 134 is formed integrally with the flat connector 126, but it would also be conceivable, the connec tion means 134 integral with the cell connector 124 form.
  • the connec tion means 134 is preferably made by machining the flat connector 126 by means of a forming process.
  • the connec tion means 134 is provided by a Switzerlandpecializingumformen, in particular a deep drawing ago.
  • the connecting means 134 is formed rib-shaped or elongated and extends into the space between the flat connector 126 and the cell connector 124. Alternatively, it would also be conceivable to form the connecting means 134 dimple-shaped. Due to the abutment of the connecting means 134, the flat connector 126 and the cell connector 124 adjacent to the connecting means 134 are partially spaced from each other, so that a gap is formed.
  • in the welding process to the material connection via the Ver connecting means 134 is introduced locally to aim for an optimal welding point to it.
  • the electrical contact 128 also abuts the flat connector 126 via a further connection means 136 in the second connection region 132.
  • the further connecting means 136 is integrally formed with the electrical contact 128, but it is also conceivable here, the connecting means 136 integrally with the flat connector 126 form.
  • the other connecting means 136 can be produced by a forming process.
  • the further connecting means 136 is oval-shaped, in particular circular, formed.
  • FIG. 3 c shows a cross section through the electrical contact device 120 and the battery cell 118.
  • the cross-section extends through the second connection region 132.
  • the further connection means 136 produced by the forming of the electrical contact 128 has a thickness that is approximately 10% thinner than the thickness of the electrical contact 128 before processing with the forming process ,
  • the formed from a metal sheet electrical cal contact 128 adjacent to the other connecting means 136 has a RESIZE ßere material thickness, as in the second connection region 132.
  • the width of the further connection means 136 and thus the width of the second connection region 132 corresponds essentially to 25% of the width of the electrical contact 128.
  • an alternative embodiment of the electrical contact device 120a is shown in which the connection of the individual components of the electrical contact device 120a at least partially not via a welding process he follows. It is a cross-section through a second connecting portion 132 a ge shows, in which an electrical contact 128 a is connected to a flat connector 126 a substantially positive fit.
  • the connection can be made, for example, by a clinching method such as clinching, punching riveting or clinching. In the clinching method, the two workpieces to be joined together are placed next to each other and subsequently the two workpieces are deformed together by means of a particularly concave shaped punch (not shown) in such a way that a positive connection is created.
  • the method can be taken as an example from DE 10 2008 025 074 A1.
  • a sheet metal connection can be realized without additional materials, which binds the materials both mechanically and electrically to one another and in which the influence on the electrical conductivity is minimal.
  • FIG. 5 a shows a first mounting module 140 in perspective. shows.
  • the first mounting module 140 comprises a printed circuit board 142 of an electronic unit 144, on which a control unit 146 comprising a computing unit, a memory unit 148, a lighting element 150 and a motion sensor 152 are arranged.
  • the conductor plate 142 extends substantially parallel to the battery cell 118 and the longitudinal extent of the battery cell 118.
  • the first electrical interface 108 comprising two elec- trical contacts 128 and three additional contacts 154, above the electrical contacts 128 are arranged.
  • a non-conductive spacer which is made in particular of a plastic, arranged to electrically isolate the electrical contacts 128 of the additional contacts 154.
  • the additional contacts 154 are adapted to transmit information to the consumer 10 and / or a La devorraum.
  • one of the additional contacts 154 is formed as a coding contact for a consumer 10, via the information about the battery pack 100, such as the state of charge, or Characteristi ka of the battery pack 100, such as the maximum and / or available Ka capacity, are transferable .
  • Another additional contact 154 may be formed as a Kodierkon contact for a charging device, via the information about the battery pack 100 and characteristics of the battery pack 100, such as the maximum and / or available capacity, are transferable.
  • Another additional contact 154 is adapted to transmit temperature information that is detected via a Tem peratursensor to the consumer 10 or a charging device.
  • the second electrical interface 110 is arranged at an opposite second end of the printed circuit board 142.
  • the control unit 146, the storage unit 148, the light emitting element 150, and the movement sensor 152 are disposed on the same side of the circuit board 142.
  • a temperature sensor 156 is formed in particular from to capture a characteristic via which a temperature of the battery cell 118 and / or the battery pack 100 can be determined.
  • the second electrical interface 110 is formed as a USB port 158.
  • the electrical contacts 128, the additional contacts 154, the USB port 158 and the temperature sensor 156 are materially connected via a solder connection and in addition positively and / or positively connected to the circuit board.
  • the circuit board Connecting elements 160 in the form of recesses into which the electrical rule's contacts 128, the additional contacts 154, the temperature sensor 156 and the USB port 158 engage positively.
  • a second mounting module 162 is shown.
  • the second mounting module 162 comprises an electronics carrier 164, which is formed from a plastic. Furthermore, the second mounting module 162, the cell connector 124 and the flat connector 126 of the electrical contact device 120.
  • the electronics carrier 164 has mounting elements 166, via the electronics carrier 164 with the cell connectors 124 and the flat connectors 126 force and / or formschlüs sig connectable ,
  • the mounting members 166 are integrally formed with the electronics carrier 164.
  • the mounting members 166 are bolt-shaped from the electronics carrier 165.
  • the cell connectors 124 and the flat connectors 126 have corresponding mounting members 168.
  • the corresponding Mon day elements 168 are formed as circular recesses.
  • One of the mounting members 166 of the electronics carrier 164 is advantageously ge with a Monta 168 of the cell connector 124 and a mounting members 168 of the flat connector 126 positively connected, whereby a particularly simple installation of the second mounting module 162 is possible.
  • the first mounting module 140 and the second mounting module 162 are positively and / or positively connected with each other.
  • the electronics support 164 has bolt-shaped form-locking elements 170 and locking element 172, the plate with corresponding recesses in the conductor 142 connectable or can be brought into engagement.
  • the positive locking elements 170 and the locking elements 172 are formed integrally with the electronics carrier 164 from.
  • the first mounting module 140 and the second mounting module 162 who thus connected to each other via a snap-in connection.
  • the individual components of the electrical contact device 120 120 are firmly bonded together.
  • the coherent connection is made by a resistance welding process.
  • the first mounting module 140 in particular the printed circuit board 142 of the electronics 144, has a welding recess 174 adjacent to the second connecting region 136 of the electrical contact device 120.
  • the connec tion areas 130, 134 of the electrical contact device at least unilaterally, in particular on both sides, exposed.
  • the cohesive joint can be realized by a resistance welding method or a laser welding method.
  • the battery cell 118 is arranged between the two cell connectors 124 (see FIG. 5c).
  • the battery cell 118 is positioned so that the temperature sensor 156 between the battery cell 118 and the electronics 144, in particular the printed circuit board 142 of the electronics 144, ver is clamped.
  • the electrical contact device 120 in particular the Zellver binder 124 is materially connected to the battery cell 118.
  • the coherent connection is also made by a resistance welding process. Alternatively, however, it is also conceivable to use a laser welding process.
  • the first mounting module 140 and the second Montagemo module 162 are added to the battery cell 118 in the battery pack housing 102.
  • Fig. 6 is a longitudinal section of réellenom in the power tool 12 menen battery pack 100 is shown.
  • the first interface 108, the second interface 110 and the electronics 144 are arranged next to the battery cell 118.
  • the first and / or the second electrical interface 108, 110 includes in essence We sent to the battery cell 118 axially.
  • the bat teriezelle 118 axially is to be understood in particular that the first and / or the second electrical interface 108, 110 not more than 20% of the length of the battery cell 118, preferably not more than 10% of the length of Battery cell 118, preferably not more than 5% of the length of the battery cell 118, protrudes beyond the battery cell 118.
  • the arranged on the circuit board 142 of the electronics 144 motion sensor 152 is connected via the control unit 146 to the light emitting element 150.
  • the motion sensor 152 is designed, in particular, to detect a motion parameter which By way of example, it corresponds to a speed, an acceleration or an angular speed or by which one of these variables can be determined.
  • the motion sensor 152 is formed as a particular 3-axis acceleration acceleration sensor.
  • the motion sensor 152 transmits the motion characteristic to the control unit 146.
  • the control unit 146 is configured to determine a motion state based on the motion characteristic of the motion sensor 152.
  • the state of motion can be, for example, a stationary or a moving state of the battery pack 100 and / or the system of consumer 10 and battery pack 100. Alternatively or additionally, it is likewise conceivable that the control unit 146 determines via the movement parameter of the motion sensor 152 and / or via a current parameter whether the system is in a working state.
  • the current characteristic can be, for example, a discharge current of the battery pack 100 that can be detected by the electronics 144. In the working state, the load 10 is powered by energy provided by the battery pack 100.
  • the electronics 144 in particular the control unit 146, is also designed to determine the state of charge of the battery cell 118 or of the battery pack 100.
  • the control unit 146 controls the lighting element 150 based on the movement state and the state of charge.
  • the light-emitting element 150 has three light-emitting diodes, a red light-emitting diode, a green light-emitting diode and a yellow light-emitting diode. If a movement state is determined by the control unit 146, which corresponds to a moved state, the light-emitting element 150 is activated. If the state of charge corresponds to a high state of charge, for example 40% to 100% of the maximum state of charge, the light-emitting element 150 is activated in such a way that the light-emitting element 150 shines green.
  • the light-emitting element 150 is activated in such a way that the light-emitting element 150 shines yellow. If the state of charge corresponds to a low state of charge, for example 5% to 20% of the maximum state of charge, the light-emitting element 150 is activated in such a way that the light-emitting element 150 shines red. In all three charging states above, the lighting element 150 is lit continuously. Corresponds to the state of charge a minimal charge state, example, 0 to 5% of the maximum state of charge, the light-emitting element 150th controlled so that the light emitting element 150 lights red and flashing.
  • the light-emitting element 150 When changing the state of motion from a moving to a stationary state, the light-emitting element 150 is not immediately deactivated, but continues to light for a predetermined time. The length of the predetermined time is dependent in particular on the height of the state of charge and stored on the memory unit 148.
  • the light-emitting element 150 When switching to the working state, the light-emitting element 150 is deactivated, since the high power consumption during operation falsifies the determination of the charge state by the electronics 144. Directly in connection to the working state, the light-emitting element 150 is activated as a function of the state of charge. In particular, the light-emitting element 150 is in connection to the operating state, regardless of the state of motion acti fourth.
  • the user can immediately recognize the remaining state of charge immediately after operation and without any operation. If the two te electrical interface 110 connected to a charging device and the battery pack 100 is charged via the charging device, the lighting element 150 is controlled by the control unit 146 such that the light emitting
  • the light-emitting element 150 is received within the battery pack housing 102.
  • the battery pack 100 has a light guide 178.
  • the light guide 178 is formed of a transparent plastic.
  • the light guide 178 is formed in two parts and has a first light guide 180 and a second light guide 182.
  • the light guide 178 is disposed adjacent to the light emitting element 150.
  • a gap is arranged between the light guide 178 and the light-emitting element 150, which gap is as small as possible.
  • the gap is smaller than 2 cm, preferably smaller than 1 cm, and preferably smaller than 0.5 cm.
  • the Lichtlei ter 178 has a light-collecting surface 184, which is the lighting element 150 faces, and a Lichtabstrahl Structure 186, which is arranged on the outer surface of the battery pack 100, on.
  • the first light guide 180 has the light collecting surface 184.
  • the second light-guiding element 182 has the light-emitting surface 186.
  • the light-collecting surface 184 extends substantially parallel to a surface over which the light-emitting element 150 emits light.
  • the light-collecting surface 184 is larger than the surface of the luminous element 150.
  • the light-collecting surface 184 encloses the luminous element 150, thus As large a portion of the emitted light as possible is able to be absorbed by the light collecting surface 184.
  • the first light-guiding element 180 is arranged in a recess of the Akkupackgrundkör pers 104. Between the Akkupackgrund stresses 104 and the first Lichtleitelement 180, a sealing element 188 is arranged in the recess, which protects the electronics 144 and the battery cell 118 from entry of dust or liquids.
  • the sealing element 188 is designed as a sealing ring.
  • the sealing ring is formed in particular of an elastic plastic.
  • the second light-guiding element 182 is arranged in a recess of the battery-pack cap 106 such that the light-emitting surface 186 is exposed to the outside.
  • the first light guide element 180 and the second light guide element 182 abut one another.
  • Fig. 7 is a perspective view of the light guide 178 is shown.
  • the first light-guiding element 180 has an annular circumferential groove 190, in which the sealing element 188 is arranged.
  • the light-collecting surface 184 has a larger area than the light-emitting surface 186.
  • the light guide 178, in particular the first light-conducting element 180 is shaped such that the light emitted by the light-emitting element 150 is at least partially focused toward the second light-guiding element 182 or the light-emitting surface 186 becomes.
  • the sealing device comprises by way of example a first sealing unit 194 and a second sealing unit 196.
  • the first sealing unit 194 and the second sealing unit 196 are arranged between the first electrical interface 108 and the second electrical interface 110.
  • the first sealing unit 194 and the second sealing unit 196 between two conditions ⁇ réellesöffnun 198 are arranged in the battery pack housing 102.
  • the interface openings 198 are disposed adjacent to the electrical interfaces 108, 110.
  • the interface openings 198 are the electrical interfaces 108, 110 with the consumer 10, in particular a corresponding electrical interface 34 of the power tool 12, and with the charging device connectable.
  • the first and second sealing units 194, 196 enclose the first and second electrical interfaces 108, 110 at least partially radially.
  • the first sealing unit 194 is shown in FIG. 8 in a perspective view.
  • the first sealing unit 194 consists of a two-part sealing element 200.
  • the outer part 202 of the sealing element 200 consists of a hard plastic
  • the inner part 204 of the sealing element 200 is made of a soft plastic.
  • the two-part sealing element 200 has an inner receiving opening 206.
  • the shape of the receiving opening 206 essentially corresponds to the shape of the battery pack housing 102, in particular of the battery pack main body 104.
  • the shape of the receiving opening 206 substantially corresponds to the shape of the battery pack housing 102 in the front region or in the region of the first electrical interface 108 and in the region in which the sealing element 200 rests in the connected state on the battery pack base body 104.
  • the battery pack housing 102 is shaped such that the sealing element 200 between this front area and the end position in the connected state always on Battery pack housing 102 is applied, so that dust and liquids are pushed back when connecting.
  • the sealing element 200 in particular the inner part 204 of the sealing element 200, elastically deformed by the battery pack housing 102 in order to achieve a high sealing effect.
  • the two-part sealing element 200 is received in a housing groove 208 in the housing 14 of the power tool 12.
  • the second sealing unit 196 consists of a sealing element 210, which is exemplified as a sealing ring.
  • the sealing ring is preferably formed elastically deformable to ensure a high sealing effect.
  • the sealing element 210 is in particular arranged between the battery pack base body 104 and the battery pack cap 106 that no dust or moisture can enter the interior of the battery pack housing 102.
  • the system has a housing opening 212, which is located between the housing 14 of the portable power tool 12 and the battery pack.
  • housing 102 is arranged.
  • the housing opening 212 is formed as a circumferential gap.
  • dust or liquids in the space between the housing 14 of the power tool 12 and the battery pack housing 102 and in the space between the Akkupack ground body 104 and the battery pack cap 106 occur.
  • the second sealing unit 196 that dust or liquid can not leave the space between the battery pack basic body 104 and the battery pack cap 106 in the direction of the interior of the battery pack housing 102.
  • the battery pack 100 has closure elements 214, 216, which are arranged in housing openings or
  • the light guide 178 is arranged in a housing opening and designed as a closure element 214.
  • the housing opening in which the light guide 178 is arranged sealed by a sealing ring formed as another sealing element 188.
  • the interface opening 198 which is arranged in the region of the second electrical interface 110, is likewise designed to be closable by means of a closure element 216.
  • the closure element 216 is designed as a movable, in particular rotatable, gela siege flap.
  • the closure element 216 formed as a tab is formed from an elastic plastic.
  • the tab is shaped in particular from a soft plastic.
  • the closure element 216 has a sealing area 222, which is designed such that the sealing area 222 is compressed in the interface opening 198 and thus seals the interface opening 198 in the connected state.
  • the closure element 216 is also designed as a further sealing element 220.
  • Fig. 9 is a perspective view of the battery pack cap 106 is shown.
  • the battery pack cap 106 is particularly formed in two parts and consists of egg nem inner housing part 224 and an outer housing part 226.
  • the outer housing part 226 is formed of a soft plastic and the inner housing part 224 is formed of a hard plastic.
  • the battery pack cap 106 is produced in particular by means of a two-component injection molding process.
  • the outer Ge housing part 226 comprises a thermoplastic elastomer, short TPE.
  • the outer housing part 226 consists of at least one thermoplastic elastomer.
  • the thermoplastic elastomer may be, for example, TPC, TPO, TPS, TPU and / or TPV.
  • the inner housing parts 224 may be formed by way of example of one of the following materials: acrylonitrile-butadiene-styrene, polycarbonate, polycarbonate-acrylonitrile-butadiene-styrene, PA, PA-GF, PMMA, polypropylene, polyethylene and / or the like. Be preferred consists of the inner housing part 224 of polycarbonate - acrylonitrile butadiene styrene and the outer housing part 226 of a ther moplastic elastomer.
  • the two latching arms 116 of the mechanical interface 114 of the Akkupackkap PE 106 are integrally formed with the inner housing part 224. Adjacent to the latching arms 116 two columns 228 are arranged in each case. The column 228 are formed such that they increase the elasticity of the locking arms 116 he. The gaps 228 extend substantially parallel to the longitudinal extension of the battery pack 100 or substantially parallel to the longitudinal extension of the battery cell 118 received in the battery pack 100.
  • the outer housing part 226 surrounds the inner housing part 224 in particular, at least in such a way that the Column 228 are completely covered. Before geous can be minimized penetration of dust and liquids in the inter mediate space between battery bag 106 and battery pack body 104 mini mized.
  • the mechanical interface 114 comprises a coupling region 230 and an operating region 232.
  • the coupling region 230 is formed as a front end of the latching arm 116 and extends in the direction of the consumer 10.
  • the coupling region 230 is designed as a latching hook, which is used to produce the mechanical connection between the load 10 and the battery pack 100 in a latching pocket 32 of the consumer 10 positively and positively engages.
  • the coupling region 230 is formed free of the outer housing part 226 and is connected in the connected state of the housing 14 of the hand-held Machine tool 12 enclosed.
  • the operating region 232 is stressed in particular by at least one, preferably by at least two columns 228.
  • the operating area 232 comprises an operating element 117.
  • the operating element 117 is mechanically coupled to the latching arm 116 in such a way that a force acting on the operating element 117 results in an actuation of the latching arm
  • the locking arms 116 leads. About a force on the operating area 232 from the outside nen Kings the locking arms 116 are moved inwards and moved out of the locking pockets 32 addition.
  • the operating regions 232 are arranged in particular such that they can be actuated in the state not connected to the consumer 10 and connected to the consumer 10.
  • the outer lying de housing part 226 rib-shaped operating means 234 on the one hand the user Be an indication of the positioning of the operating area 232 to avail supply and on the other hand increase the friction in the operating area 232, so that the battery pack can be gripped safely.
  • the operating means 234 is arranged on the outside of the operating element 117.
  • the inner housing part 224 is essentially completely enclosed by the outer housing part 226. In this way, when the system of consumer 10 and battery pack 100 falls, the force effect by the elastic and vibration-damping softer material of the outer housing part 226 can be ef fectively dampened, thus protecting the battery pack 100 from damage.

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

Abstract

La présente invention concerne un bloc d'accumulateurs, en particulier un dispositif de contact électrique pour un bloc d'accumulateurs, comprenant : un connecteur de cellules par le biais duquel le dispositif de contact électrique peut être connecté électriquement à une cellule de batterie ; un contact électrique par le biais duquel le dispositif de contact électrique peut être connecté à un consommateur et/ou à un dispositif de charge ; et un connecteur plat pour la liaison électrique et mécanique du connecteur de cellule au contact électrique. Dans une première zone de connexion, le connecteur de cellule est connecté par conformité de matière au connecteur plat et le connecteur plat est connecté dans une seconde zone de connexion par conformité de matière au contact électrique. Selon l'invention, au moins une connexion par conformité de matière, en particulier toutes les connexions par conformité de matière, sont effectuées par un procédé de soudage.
EP19718274.4A 2018-05-04 2019-04-08 Bloc d'accumulateurs Pending EP3788660A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018206883.6A DE102018206883A1 (de) 2018-05-04 2018-05-04 Akkupack
PCT/EP2019/058776 WO2019211063A1 (fr) 2018-05-04 2019-04-08 Bloc d'accumulateurs

Publications (1)

Publication Number Publication Date
EP3788660A1 true EP3788660A1 (fr) 2021-03-10

Family

ID=66223675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19718274.4A Pending EP3788660A1 (fr) 2018-05-04 2019-04-08 Bloc d'accumulateurs

Country Status (5)

Country Link
US (1) US20210226292A1 (fr)
EP (1) EP3788660A1 (fr)
CN (1) CN112106222A (fr)
DE (1) DE102018206883A1 (fr)
WO (1) WO2019211063A1 (fr)

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Also Published As

Publication number Publication date
CN112106222A (zh) 2020-12-18
DE102018206883A1 (de) 2019-11-07
WO2019211063A1 (fr) 2019-11-07
US20210226292A1 (en) 2021-07-22

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