EP4205227A1 - Electronics component for a cell-contacting system - Google Patents

Electronics component for a cell-contacting system

Info

Publication number
EP4205227A1
EP4205227A1 EP21761978.2A EP21761978A EP4205227A1 EP 4205227 A1 EP4205227 A1 EP 4205227A1 EP 21761978 A EP21761978 A EP 21761978A EP 4205227 A1 EP4205227 A1 EP 4205227A1
Authority
EP
European Patent Office
Prior art keywords
cell
circuit board
electronic component
connecting elements
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21761978.2A
Other languages
German (de)
French (fr)
Inventor
Jürgen Weyh
Martin Wieberger
Ingo Weber
Dario KREMSER
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.)
Diehl Advanced Mobility GmbH
Original Assignee
Diehl Advanced Mobility 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 Diehl Advanced Mobility GmbH filed Critical Diehl Advanced Mobility GmbH
Publication of EP4205227A1 publication Critical patent/EP4205227A1/en
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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • 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
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/53—Fixed connections for rigid printed circuits or like structures connecting to cables except for flat or ribbon cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to cell contacting systems for electrical energy storage devices, here in particular batteries, in particular drive batteries for electrically powered motor vehicles.
  • Electrical energy storage devices are used to store or temporarily store electrical energy. Such energy storage devices may, for example, be accumulator or battery packs with multiple cells, i. H. Battery or rechargeable cells include. For the sake of simplicity, such energy storage devices are generally referred to as “batteries” within the meaning of the present patent application. Batteries of this type are used in particular as drive or driving batteries for electric motor vehicles.
  • Cell contacting systems are connection systems which are used to electrically connect individual cells of the battery, in particular accumulator or battery cells or batteries consisting of several cells, to one another.
  • the individual cells or cell groups are interconnected by appropriate cell contacting systems, so that a desired target voltage is available at connections or taps of the cell contacting systems.
  • the cell contacting systems usually also contain means to monitor both the individual cells and the entire battery, for example with regard to temperatures, voltages and currents, or to manage them during charging or discharging.
  • Such means are in particular sensor lines, sensors or electronic circuits.
  • a connection system for an energy storage device is known from EP 2 639 857 B1, with the energy storage device having a plurality of cells, with a plurality of cell connectors held by a carrier system for electrically interconnecting the cells, with a storage control unit for monitoring an energy reserve and/or State of charge of the cells, wherein the carrier system is designed to accommodate the memory control unit and / or to hold and wherein the memory control unit is integrated or detachable with the carrier system.
  • a carrier part comprised by the carrier system has an interface and/or receptacle for the storage control unit.
  • the object of the present invention is to propose improvements in relation to a cell contacting system.
  • the cell contacting system is in particular one for a drive battery of an electrically driven motor vehicle.
  • the invention is based on the fact that the cell contacting system has a plurality of cell connectors which are used for power contacting of battery cells of a battery. This means that the battery power is taken from or fed into the cell connectors.
  • the electronic component is designed with regard to an intended cell contacting system. "Intended” means that the electronic component is structurally matched to a specific or a specific type of cell contacting system or battery and is intended for use there; e.g. designed for the geometry requirements, performance requirements, etc. determined thereby.
  • a (at least later, in the assembled state) fixed and known geometric relative position of the cell connectors to one another or in the cell contacting system is also known, at least if the cell contacting system is connected to the battery as intended.
  • the electronic component contains a printed circuit board for a measurement and/or management arrangement for the battery, the printed circuit board (or its lines/components) being electrically connectable to exactly two of the cell connectors.
  • the printed circuit board has at least one soldering surface for each of the cell connectors.
  • the cell connector is to be soldered to this so that the electrical connection is created.
  • the printed circuit board can in particular also be made in several parts.
  • the electronic component contains at least one electrical connection element that can be soldered onto at least one of the soldering surfaces.
  • Each of the connecting elements is used for the respective electrical connection of the soldering surface and thus the printed circuit board with the cell connector.
  • At least one of the cell connectors is, in particular, unipolar.
  • At least one, in particular all of the first and/or second (see below) of the connecting elements are designed in the form of strips over a large area.
  • “Area-like strips” means that they have a particularly constant, comparatively low height in relation to their lateral and longitudinal extent.
  • “Strip-like” can - viewed in the longitudinal direction of the strip - include straight, kinked, bent, angled, curved embodiments. Or to put it another way: the areal, strip-like connecting element runs in one plane.
  • At least a first of the connecting elements leads to a first of the cell connectors. This (the first) is used for mechanical attachment and/or thermal transmission between the cell connector and circuit board and is comparatively (i.e. in relation to the second, see below) mechanically rigid and comparatively short.
  • the implementation in this way serves to bring about or promote the desired properties (fixing, transmission, in particular physical bridge, thermal bridge).
  • At least a second of the connecting elements leads to the second of the cell connectors.
  • This (the second) is used for thermal and/or mechanical (3D) length compensation between the cell connectors and/or a corresponding compensation between the second cell connector and the circuit board and is comparatively (in relation to the first) mechanically flexible or more flexible and comparatively long or longer (again seen in the longitudinal direction of the strip).
  • the design serves to bring about or promote the desired properties (3D length compensation or flexibility, in particular strain relief).
  • The—particularly 3D—“length compensation” is to be understood in the sense of 3D flexibility or 3D mobility. This is to be understood in such a way that the connecting element can compensate for or yield to movements, displacements of its ends or fixing points in all three spatial directions, i.e. in 3D. This is achieved in particular by a curved or bridge-shaped or U-shaped or S-shaped profile of the connecting element. The same also applies to a shape for the wire mentioned below.
  • the circuit board also has at least one communication interface for data exchange of information with a remote station.
  • Information is any information that is useful or necessary for battery management, in particular information about currents, voltages and temperatures of the contacted battery in the installed state or when the battery is in operation. Communication can take place in one or both directions (incoming/outgoing) starting from the printed circuit board.
  • the remote station can be a communication interface of another printed circuit board (in particular another electronic component) or another remote station inside or outside the cell contacting system, e.g. an external evaluation unit, central controller, etc.
  • the electronic component therefore has connecting elements for exactly two cell connectors.
  • the electronic component is used to evaluate the status of a battery with regard to exactly two of its cell connectors. This can be used, for example, to determine the voltage of an individual battery cell or its temperature, impedance, current output, etc.
  • a number of such electronic components can thus be placed in an entire battery and connected to one another so that they can communicate in order to be able to manage the entire battery.
  • measurement signals from the battery are received or generated on the printed circuit board.
  • a conversion of such measurement signals into a data-transmittable signal takes place on the printed circuit board in order to transmit this via the communication interface.
  • a printed circuit board is introduced/integrated into the cell contacting system, which carries out electrical transmission/processing of measurement signals.
  • the cell contacting system with the electronic components is expanded by the communication interface in such a way that a data transmission system (wired or wireless) can be used for communication between individual printed circuit boards or cells of a module and between several battery modules.
  • a connecting element from the printed circuit board to the cell connectors which is flat and can optionally be designed to be protected against corrosion, fulfills the function of 3D compliance or strain relief (flexibility) and a physical bridge (because it is relatively rigid and short, e.g. thermal bridge ) between the cell connector and the printed circuit board, in particular to a sensor location on the printed circuit board as a sensory element.
  • An optional partial coating of the base material ensures direct connection both to the load path (cell connector) and to the printed circuit board (PCB).
  • an aluminum connecting element results as a stamped part, as well as one that serves as a physical bridge.
  • the aluminum connecting element can already be protected against corrosion (see below).
  • a selective (e.g. in a soldering area) coating (in particular tin coating) of the connecting element (in particular aluminum) enables contact to the printed circuit board (PCB / FPC flexible printed circuit, soldering of tin-coated aluminum on the soldering surface, in particular copper). It also enables a suitable pairing of materials when contacting cell connectors (connecting element as aluminum uncoated on the aluminum of the cell connector).
  • a processing sequence (manufacturing a cell contact system / battery module) can be chosen favorably for the heat input (soldering: high / laser welding: low), so that, for example, a soldered joint previously made does not soften again during later welding.
  • Connection elements allow 3D flexibility or strain relief for thermal movements.
  • laying the wire e.g. enamelled copper wire
  • a data transfer can be designed in any way in the ZKS (cell contacting system) itself and between the ZKS and a remote station/evaluation unit etc.
  • an electronic component (printed circuit board with corresponding components) is integrated into the cell contacting system, which converts the measurement signals of the signal lines (connecting elements) into a signal that can be used for data transmission systems (transmission via the communication interface). (e.g. digital signal) converts.
  • a data transmission system e.g. BUS, wired or wireless
  • the invention is based on the finding that in the products (cell contacting systems) currently known from practice, electromechanical line systems are used for signal transmission.
  • the signal processing is implemented externally (i.e. outside the ZKS). Sensors are connected directly to the components to be monitored, remote from the processing electronics. Analog (measuring) signals are implemented using FPC or Cu conductors with plug connections.
  • the control unit/PCB is usually located externally.
  • the result is an integration of electronics in cell contacting systems (single/multicell design).
  • the result is a connection of electronics to aluminum sense points (the point of the cell connector that is to be measured).
  • the result is an extension of cell contacting systems by one or more electrically conductive components, which enables the forwarding and connection of signal and sensor lines within battery systems for further processing.
  • At least one of the connecting elements has a selective coating in a soldering area to be soldered to the soldering surface.
  • Selective here means that the coating is limited to a corresponding area of the connecting element. In particular, this is accurate the soldering area, possibly extended by a tolerance range/surroundings of the soldering area, which is selected, for example, in such a way that soldering takes place safely within the area of the coating, taking all tolerances into account. This results in secure soldering between the printed circuit board and the connecting element.
  • At least one transition area between the base material of the connecting element and the coating is sealed against corrosion. This results in protection against corrosion for the connecting element.
  • the sealing takes place in particular to the extent or in such a way that, taking into account all tolerances, the connecting element that is completely soldered to the printed circuit board is completely and reliably protected against corrosion.
  • At least one of the connecting elements consists of aluminum (in particular as the base material). If an above-mentioned coating is provided, the coating is alternatively or additionally a tin coating.
  • aluminum coated with tin (as an optional base material of the connecting element) can be soldered particularly well to copper (as an optional material for the soldering surface).
  • At least one, preferably all of the first and/or second, of the connecting elements is a stamped part made from a sheet metal plate.
  • the sheet metal plate is in particular an aluminum plate.
  • the circuit board contains a temperature sensor that is fixedly attached to the circuit board.
  • the temperature sensor is attached thermally coupled to the soldering surface for the first connection element.
  • the temperature sensor is arranged as close, as close and thermally coupled as possible to the soldering surface, in particular directly adjacent to it, below it, etc. The temperature sensor thus results in a sensor point on the circuit board that is thermally optimal over the soldering surface and the assembled connector is coupled to the cell connector without the need for a Having to place temperature sensors externally from the circuit board directly on the cell connector.
  • At least one of the first connecting elements has a rectangular shape.
  • Such a shape is particularly easy to produce as a flat strip or tongue, in particular as a stamped part.
  • At least one of the second connecting elements is S-shaped (again in the plane or along its flat, strip-like extension). In other words, it is an S-shaped strip or band.
  • the connecting element has a straight center leg. At each end of the middle leg, a partial leg follows with a 180° turn. The two partial legs therefore run parallel to the central leg, one on one side and the other on the other side of the central leg.
  • the ends of the central limbs that are in turn remote are connected to respective supply limbs, which branch off perpendicularly, ie with a 90° turn, from the partial limbs, ie at right angles to the central limb and the partial limbs and run away from them.
  • the partial legs only have a partial length, in particular half the length of the middle leg.
  • the corresponding connecting element is produced in particular in that straight longitudinal cuts separate the partial limbs from the central limb, which end in particular in round free cuts for stress relief. Correspondingly round free cuts are also provided, in particular, at the branches of the feed limbs from the partial limbs.
  • the corresponding connecting element can be implemented particularly easily as a stamped sheet metal part.
  • the communication interface has at least one receiving means for a wire as at least part of a communication channel or as a transmission medium for the communication.
  • the communication channel is formed in particular from two, three or four wires.
  • the receiving means is in particular a fork contact.
  • the wire or connecting wire is designed in particular as enamelled copper wire. Recording means and wire together form a wire section.
  • the wire section contains the receiving means, in particular at least one clamping fork for a connecting wire, and the connecting wire leading from the clamping fork to the opposite station.
  • the connecting wire is in particular an enameled wire, in particular a copper enameled wire.
  • the communication takes place by radio.
  • At least one of the connecting elements is a one-piece direct connector between the printed circuit board and the cell connector.
  • the stamped parts mentioned above can be produced particularly well in one piece.
  • the printed circuit board in an assembled state in the cell contacting system, is mechanically attached to the cell connectors and thereby in the cell contacting system exclusively by means of the connecting elements.
  • the printed circuit board then does not have to be held separately mechanically.
  • this results in a dual functionality for the first connecting element as a thermal bridge and mechanical fastening element, possibly also for the second connecting element as a thermal/mechanical (3D) length compensation and fastening element.
  • the object of the invention is also achieved by a cell contacting system according to patent claim 12.
  • the cell contacting system and at least some of its embodiments and the respective advantages have already been explained in connection with the electronic component according to the invention.
  • the cell contacting system contains a plurality of cell connectors, which are used for power contacting of battery cells, and at least one electronic component according to the invention.
  • a corresponding cell contacting system the number, location, shape, geometry, relative position to one another, etc. of cell connectors and other structural parts is known.
  • n ⁇ 1 electronic components are provided, which always connect two of the n cell connectors with one another, so that, for example, all partial voltages between all cell connectors can be determined.
  • the object of the invention is also achieved by a method according to patent claim 13 for producing a cell contacting system according to the invention.
  • the electronic components according to the invention are or are provided in a still unassembled state, that is to say as individual parts with regard to the printed circuit board and connecting elements.
  • the electrical connection elements are then connected to the printed circuit board by soldering.
  • the electrical connection elements are then connected to the cell connectors, in particular by welding. As explained above, due to the lower heat input during later welding, there is no softening of the soldered joints that have already been completed.
  • the object of the invention is also achieved by a method according to patent claim 14 for producing a battery module.
  • the battery module contains a battery and a cell contacting system according to the invention that contacts the battery.
  • the electronic components according to the invention are provided as individual parts as above.
  • the remaining cell contacting system(s) according to the invention (without electronic components) are provided separately from this.
  • the cell contact system is connected to the battery without the electronic components.
  • the printed circuit boards are then electrically connected to the cell connectors by means of the connecting elements, in particular according to the method according to the invention, as explained above.
  • the invention is based on the following findings, observations and considerations and also has the following embodiments.
  • the embodiments are sometimes also referred to as “the invention” for the sake of simplicity.
  • the embodiments can also contain parts or combinations of the above-mentioned embodiments or correspond to them and/or optionally also include embodiments that have not been mentioned before.
  • stamped parts made of aluminum are possible as connecting elements, the stamped parts can be connected in a stamped strip.
  • a selective coating of the connecting element with tin is possible, as well as a selective covering of the coating transition to protect against corrosion.
  • the result is an integration of a length and vibration compensation via the shape of the connection tion elements, in particular via their punching geometry.
  • a connection (PCB to cell connector / connecting element) via a soldering process to PCB, flex PCB or rigid-flex PCB is possible. Automatic processing on placement machines is possible.
  • the invention is used to connect ZKS control electronics to the cell connectors.
  • a temperature signal is transmitted in particular by a suitable design of the first connecting element, in particular as an aluminum stamped part.
  • a laser welded connection is possible through the use of aluminum (alu) material in the connecting element. This creates the same material (of the connecting element) as the cell connectors (usually also made of aluminum) in the ZKS.
  • a stamped aluminum part results as a connecting element of the PCB to the sensing point (desired measuring point for voltage, temperature, current, etc.) on the cell connector.
  • a selective tin coating on the connecting element enables the same material (the base material of the connecting element) to be used with a laser weld to form the cell connector. Corrosion protection can already be applied to the individual part (connecting element / printed circuit board with connecting element). It is possible to create a bus system within the ZKS module using enamelled copper wire. In addition to transmitting voltage/current or the corresponding measured variables, the connecting element (stamped part) can also transmit the temperature to the printed circuit board.
  • FIG. 1 shows an electronic component in an oblique view
  • FIG. 2 shows a cell contacting system with four electronic components according to FIG.
  • Figure 1 shows an electronic component 2 for a cell contacting system 4.
  • FIG. 2 shows four (n-1, see below) of the electronic components 2 from FIG. e serve for power contacting of battery cells not shown in the figures of a battery.
  • the cell contacting system 4 is mounted on the battery by, among other things, the cell connectors 6a-i being welded to the battery poles.
  • the electronic component 2 contains a printed circuit board 8. This is part of a management arrangement, not shown in detail in the figures, in order to implement battery management on the battery during its operation.
  • the printed circuit board 8 contains two soldering areas 10a, b, here in the form of copper (Cu) areas.
  • the soldering surfaces 10a, b are used to electrically connect the circuit boards 8 to the cell connectors 6a-e via two connecting elements 12a, b in this case.
  • the two connecting elements 12a, b are also part of the respective electronic component 2.
  • Each of the connecting elements 12a, b has a single-pole design and has a soldering area 18a, b on its respective end facing the printed circuit board 8 in the assembled state, which is only indicated in the figures by dashed lines and is not visible, since it is located on the Representation downward-pointing underside of the connecting elements 12a, b is located and already soldered to the soldering pads 10a, b.
  • the connecting elements 12a, b are designed to be two-dimensional, namely as aluminum (aluminum) sheets (relatively thin in relation to their areal transverse extent), and are designed in the form of strips: the connecting elements 12a are straight strips in a rectangular shape, the connecting elements 12b are S-shaped Strips with a respective broadening at their ends.
  • the connecting elements 12a to a respective first of the cell connectors (6b, d) are designed to be mechanically rigid and comparatively short for mechanical attachment and thermal transmission between cell connectors 6b, d and circuit board 8 (compared to the connecting elements 12b).
  • the connecting elements 12b to a second cell connector (6a,c,e) are for thermal and/or mechanical 3D length compensation between the cell connectors 6a-e and/or between the second cell connector (6a,c,e) and the printed circuit board 8 comparatively (compared to the connecting elements 12a) mechanically flexible and long.
  • this is achieved in that the length is increased by running the strip along an S-shape, i.e. changing direction twice by 90° and twice by 180°.
  • a straight central leg 36 is provided, with a 180° change in direction then on both sides a half-length partial leg 38a, b parallel thereto, and on both sides of this a feed leg 40a, b branching off at right angles from the partial leg (90° change in direction).
  • the flexibility of the structure is achieved by the length of the strip and the flexibility of the structure at the respective four bends/changes in direction, which are also provided with round cutouts 42 for this purpose, among other things.
  • the printed circuit board 8 also has a communication interface 22 in the example, which is also part of the electronic component 2 .
  • Each of the communication interfaces 22 is designed here in the form of two receiving means 24 for wire 28 in the form of fork contacts connected to the printed circuit board 8 .
  • the fork contacts are connected to the printed circuit board 8 or are mechanically connected to it.
  • Each of the receiving means 24 is used for electrically contacting and mechanically fastening receiving of a wire 28, here enamelled copper wire. Communication then takes place via the corresponding wires 28 as an electrical communication line/communication medium or bus system 44 for data exchange with a remote station 26, here a communication interface 22 of a further printed circuit board 8.
  • the wires 28 thus form a communication channel 30 of the bus system 44.
  • the connecting elements 12a, b are one-piece direct connectors between the printed circuit board 8 and the respective cell connector 6a-e.
  • the printed circuit board 8 is held mechanically in the cell contacting system 4 exclusively via the connecting elements 12a-e and exclusively on the cell connectors 6a-i.
  • the ZKS 4 is mounted on the battery.
  • the signal lines (here realized by the connecting elements 12a, b) of the individual potential levels (e.g. potentials of the contacted cell connectors 6a-e) of the battery system are then on the individual circuit board 8 as a processing system (here a PCB, alternatively also flex / flex-rigid PCB) summarized.
  • a processing system here a PCB, alternatively also flex / flex-rigid PCB
  • the potential levels are converted into a digital signal by means of the communication interfaces 22 and passed on via a data transmission system (BUS, bus system 44, here the wires 28), here to the remote station 26.
  • BUS bus system 44, here the wires 28
  • a printed circuit board 8 (“single-cell chip”) picks up the signals between two successive potentials (cell connectors 6a, b/6b, c/6c, d/6d,e) and is located directly between these or the two in each case Cell connectors 6. Two successive potentials are routed to the next potential via long, selectively coated connecting elements 12a, b (12b with 3D flexibility or strain relief).
  • the selective coating 14 (because it is not applied over the entire surface of the connecting elements 12) is located on the connecting element 12a, b (selectively only) in the respective soldering area 18a, b and is also not visible in the figures or is only indicated by dashed lines.
  • the high level of repeatability of the connecting elements 12a,b thus enables an impedance measurement.
  • the connecting elements 12a, b can or are designed here as stamped parts, and can be located on a stamped belt and automated assembly is thus possible (not shown).
  • the selective coating 14 simplifies the welding of the connecting elements 12 at the points 13 with the cell connectors 6 due to the same material (uncoated aluminum of the connecting element 12 and aluminum of the cell connector 6) and also meets the requirements of corrosion protection.
  • the lengthening due to heat and the vibration compensation are achieved via the stamping geometry of the connecting elements 12b.
  • the connection to the circuit board 8 is created via a soldering process, where the PCB can be designed as rigid, flex or flex-rigid. The soldering takes place between the soldering surface 10 and the soldering area 18 .
  • the data transmission is effected by special Cu pins (fork contacts, receiving means 24), which are used for the application of a laser welding process to produce an aluminum-copper welded joint suitable for series production. These pins allow digital signals to be transmitted between individual printed circuit boards 8 or between individual battery systems.
  • the data is transmitted via BUS connections on the part of the communication interfaces 22.
  • the electronic component 2 is designed as a "single cell chip” variant (contacts only two cell connectors 6) and is mechanically fixed via the connecting elements 12a and thermally sufficiently well coupled to one of the cell connectors 6b, d and engages via an integrated Temperature sensor 34 or temperature sensor (NTC, part of the chip shown, indicated only symbolically) the temperature of the cell connector 6b, d.
  • NTC Temperature sensor 34 or temperature sensor
  • Two successive potentials (second cell connector 6a, c to 6b, 6c, e to 6d) are routed to the next potential (cell connector 6b, d) via connecting elements 12b (long or flexible with 3D flexibility or strain relief). Impedance measurement is also possible in this way.
  • the temperature sensor 34 is attached directly to the soldering surface 10a, so that it is also as close as possible to the connecting element 12a in the assembled state. It is thermally connected to the temperature transfer from the cell connector 6 via the connecting element 12a to the soldering surface 10a in the best possible way.
  • a cell contacting system 4 correspondingly completed with a battery, not shown, there is a single-cell control according to FIG I chip (printed circuit board 8) via enameled copper wire here (welding forks, receiving means 24, etc.), in the example a two-wire bus or bus system 44 made of two wires 28.
  • the cell contacting system 4 is produced as follows: First, the electrical connecting elements 12a, b are connected to the printed circuit board 8 by soldering (soldering areas 10 and soldering areas 18). Subsequently, the electrical connection elements 12a, b are connected to the cell connectors 6, welded here.
  • a battery module which contains a battery and a cell contacting system 4 contacting the battery, is produced as follows: The electronic component 2 and, separately from this, the rest of the cell contacting system 4 are provided. First, the cell contacting system 4 is connected to the battery without the electronic component 2, ie the cell connector 6 is welded onto the battery poles. The printed circuit board 8 is then electrically connected to the cell connectors 6 by means of the connecting elements 12, in particular according to the method explained above, ie the cell contacting system is produced or completed.

Abstract

An electronics component (2) for a cell-contacting system (4) with cell connectors (6a-e) for a battery contains a printed circuit board (8) of a measuring and/or management arrangement for the battery with a communication interface (22), the printed circuit board (8) can be electrically connected to precisely two of the cell connectors (6a-e) and, for this purpose, has at least one soldering area (10a, b) for each of the cell connectors (6a-e), having at least one electrical connecting element (12a, b) which is areally of strip-like form and can be soldered onto the soldering areas (10a, b), wherein a first connecting element (12a, b) for mechanical fastening and/or thermal transfer is of comparatively mechanically rigid and comparatively short design, and a second connecting element (12a, b) for thermal and/or mechanical length compensation is of comparatively mechanically flexible and long design. A cell-contacting system (4) with cell connectors (6a-e) contains at least one electronics component (2). In a method for producing a cell-contacting system (4), the electrical connecting elements (12a, b) are first connected to the printed circuit board (8) by soldering, and the electrical connecting elements (12a, b) are then connected to the cell connectors (6a-e). In a method for producing a battery module, the cell-contacting system (4) is first connected to the battery without the electronics component (2) and the printed circuit board (8) is then connected to the cell connectors (6a-e).

Description

Elektronikkomponente für ein Zellkontaktiersystem Electronic component for a cell contacting system
Die Erfindung betrifft Zellkontaktiersysteme für elektrische Energiespeichereinrichtungen, hier insbesondere Batterien, insbesondere Antriebsbatterien für elektrisch angetriebene Kraftfahrzeuge. The invention relates to cell contacting systems for electrical energy storage devices, here in particular batteries, in particular drive batteries for electrically powered motor vehicles.
Elektrische Energiespeichereinrichtungen werden zum Speichern bzw. Zwischenspeichern von elektrischer Energie verwendet. Solche Energiespeichereinrichtungen können z.B. Akkumulatoren- oder Batteriepacks mit mehreren Zellen, d. h. Batterie- oder Akkuzellen umfassen. Solche Energiespeichereinrichtungen werden im Sinne der vorliegenden Patentanmeldung der Einfachheit halber generell als "Batterien" bezeichnet. Anwendung finden derartige Batterien insbesondere als Antriebs- bzw. Fahrbatterien für elektrische Kraftfahrzeuge. Electrical energy storage devices are used to store or temporarily store electrical energy. Such energy storage devices may, for example, be accumulator or battery packs with multiple cells, i. H. Battery or rechargeable cells include. For the sake of simplicity, such energy storage devices are generally referred to as “batteries” within the meaning of the present patent application. Batteries of this type are used in particular as drive or driving batteries for electric motor vehicles.
Zellkontaktiersysteme sind Verbindungssysteme, die dazu dienen, einzelne Zellen der Batterie, insbesondere Akkumulator- oder Batteriezellen bzw. aus mehreren Zellen bestehende Batterien elektrisch miteinander zu verbinden. Durch entsprechende Zellkontaktiersysteme werden die einzelnen Zellen oder Zellverbände zusammengeschaltet, so dass eine gewünschte Zielspannung an Anschlüssen bzw. Abgriffen der Zellkontaktiersysteme zur Verfügung steht. Cell contacting systems are connection systems which are used to electrically connect individual cells of the battery, in particular accumulator or battery cells or batteries consisting of several cells, to one another. The individual cells or cell groups are interconnected by appropriate cell contacting systems, so that a desired target voltage is available at connections or taps of the cell contacting systems.
Die Zellkontaktiersysteme enthalten dabei in der Regel auch Mittel, um sowohl die einzelnen Zellen als auch die gesamte Batterie z.B. hinsichtlich Temperaturen, Spannungen und Strömen zu überwachen bzw. im Lade- oder Entladebetrieb zu managen. Solche Mittel sind insbesondere Sensorleitungen, Sensoren oder auch elektronische Schaltungen. Z.B. ist aus der EP 2 639 857 B1 ein Verbindungssystem für eine Energiespeichereinrichtung bekannt, wobei die Energiespeichereinrichtung eine Mehrzahl an Zellen aufweist, mit einer Mehrzahl von durch ein Trägersystem gehalterten Zellverbindern zum elektrischen Zusammenschalten der Zellen, mit einer Speicherkontrolleinheit zur Überwachung eines Energievorrats und/oder Ladezustands der Zellen, wobei das Trägersystem dazu ausgebildet ist, die Speicherkontrolleinheit aufzunehmen und/oder zu haltern und wobei die Speicherkontrolleinheit mit dem Trägersystem integriert oder lösbar ausgebildet ist. Ein vom Trägersystem umfasstes Trägerteil weist eine Schnittstelle und / oder Aufnahme für die Speicherkontrolleinheit auf. The cell contacting systems usually also contain means to monitor both the individual cells and the entire battery, for example with regard to temperatures, voltages and currents, or to manage them during charging or discharging. Such means are in particular sensor lines, sensors or electronic circuits. For example, a connection system for an energy storage device is known from EP 2 639 857 B1, with the energy storage device having a plurality of cells, with a plurality of cell connectors held by a carrier system for electrically interconnecting the cells, with a storage control unit for monitoring an energy reserve and/or State of charge of the cells, wherein the carrier system is designed to accommodate the memory control unit and / or to hold and wherein the memory control unit is integrated or detachable with the carrier system. A carrier part comprised by the carrier system has an interface and/or receptacle for the storage control unit.
Aufgabe der vorliegenden Erfindung ist es, Verbesserungen in Bezug auf ein Zellkontaktiersystem vorzuschlagen. The object of the present invention is to propose improvements in relation to a cell contacting system.
Die Aufgabe wird gelöst durch eine Elektronikkomponente gemäß Patentanspruch 1 für ein Zellkontaktiersystem. Bevorzugte oder vorteilhafte Ausführungsformen der Erfindung sowie anderer Erfindungskategorien ergeben sich aus den weiteren Ansprüchen, der nachfolgenden Beschreibung sowie den beigefügten Figuren. The object is achieved by an electronic component according to patent claim 1 for a cell contacting system. Preferred or advantageous embodiments of the invention and other categories of the invention result from the further claims, the following description and the attached figures.
Das Zellkontaktiersystem ist insbesondere ein solches für eine Antriebsbatterie eines elektrisch angetriebenen Kraftfahrzeugs. The cell contacting system is in particular one for a drive battery of an electrically driven motor vehicle.
Die Erfindung geht davon aus, dass das Zellkontaktiersystem eine Mehrzahl von Zellverbindern aufweist, die zur Leistungskontaktierung von Batteriezellen einer Batterie dienen. Dies bedeutet, dass über die Zellverbinder die Batterieleistung aus dieser entnommen oder in diese eingespeist wird. Insbesondere ist die Elektronikkomponente im Hinblick auf ein bestimmungsgemäßes Zellkontaktiersystem ausgeführt. "Bestimmungsgemäß" heißt, dass die Elektronikkomponente auf ein bestimmtes oder einen bestimmten Typ von Zellkontaktiersystem bzw. Batterie konstruktiv abgestimmt ist und für den Einsatz dort vorgesehen ist; z.B. für die dadurch bestimmten Geometrieanforderungen, Leistungsanforderungen usw. ausgelegt ist. The invention is based on the fact that the cell contacting system has a plurality of cell connectors which are used for power contacting of battery cells of a battery. This means that the battery power is taken from or fed into the cell connectors. In particular, the electronic component is designed with regard to an intended cell contacting system. "Intended" means that the electronic component is structurally matched to a specific or a specific type of cell contacting system or battery and is intended for use there; e.g. designed for the geometry requirements, performance requirements, etc. determined thereby.
Im Sinne der oben genannten bestimmungsgemäßen Eignung werden im Rahmen der Anmeldung daher auch Eigenschaften von Zellkontaktiersystem bzw. Batterien be- schrieben, obschon die eigentlichen Komponenten streng genommen nicht Teil, sondern Objekt der jeweiligen Erfindung sind. Diese Aussagen gelten jedoch sinngemäß auch für die weiter unten beschriebenen erfindungsgemäßen Zellkontaktiersysteme bzw. Batterien und werden gegebenenfalls dort nicht nochmals explizit wiederholt. In terms of the above-mentioned intended suitability, properties of cell contacting systems or batteries are therefore also specified in the context of the application. wrote, although strictly speaking the actual components are not part but the object of the respective invention. However, these statements also apply mutatis mutandis to the cell contacting systems or batteries according to the invention described further below and may not be explicitly repeated there again.
Insbesondere ist daher auch eine (zumindest spätere, im Montagezustand) feste und bekannte geometrische Relativlage der Zellverbinder zueinander bzw. im Zellkontaktiersystem bekannt, zumindest, wenn das Zellkontaktiersystem bestimmungsgemäß mit der Batterie verbunden ist. In particular, therefore, a (at least later, in the assembled state) fixed and known geometric relative position of the cell connectors to one another or in the cell contacting system is also known, at least if the cell contacting system is connected to the battery as intended.
Die Elektronikkomponente enthält eine Leiterplatte einer Mess- und/oder Managementanordnung für die Batterie, wobei die Leiterplatte (bzw. deren Leitungen / Komponenten) mit genau zwei der Zellverbinder elektrisch verbindbar ist. Hierzu, also zur Verbindung mit dem Zellverbinder, weist die Leiterplatte für jeden der Zellverbinder mindestens eine Lötfläche auf. Auf diesem ist der Zellverbinder festzulöten, damit die elektrische Verbindung entsteht. Die Leiterplatte kann dabei insbesondere auch mehrteilig ausgeführt sein. The electronic component contains a printed circuit board for a measurement and/or management arrangement for the battery, the printed circuit board (or its lines/components) being electrically connectable to exactly two of the cell connectors. For this purpose, ie for connection to the cell connector, the printed circuit board has at least one soldering surface for each of the cell connectors. The cell connector is to be soldered to this so that the electrical connection is created. The printed circuit board can in particular also be made in several parts.
Die Elektronikkomponente enthält für jeden der Zellverbinder mindestens ein, auf mindestens eine der Lötflächen auflötbares elektrisches Verbindungselement. Jedes der Verbindungselemente dient zur jeweiligen elektrischen Verbindung der Lötfläche und damit der Leiterplatte mit dem Zellverbinder. Mindestens einer der Zellverbinder ist insbesondere einpolig. For each of the cell connectors, the electronic component contains at least one electrical connection element that can be soldered onto at least one of the soldering surfaces. Each of the connecting elements is used for the respective electrical connection of the soldering surface and thus the printed circuit board with the cell connector. At least one of the cell connectors is, in particular, unipolar.
Mindestens eines, insbesondere alle ersten und/oder zweiten (siehe unten), der Verbindungselemente sind flächenhaft streifenartig ausgebildet. "Flächenhaft streifenartig" bedeutet, dass diese eine insbesondere gleichbleibende, vergleichsweise geringe Höhe im Verhältnis zu deren Seiten- und Längsausdehnung aufweisen. "Streifenartig" kann dabei - jeweils in Längserstreckungsrichtung des Streifens gesehen - gerade, abknickende, gebogene, gewinkelte, gekrümmte Ausführungsformen einschließen. Oder anders ausgedrückt: Das flächenhaft streifenartig ausgebildete Verbindungselement verläuft in einer Ebene. Mindestens ein erstes der Verbindungselemente führt zu einem ersten der Zellverbinder. Dieses (die ersten) dient der mechanischen Befestigung und/oder thermischen Übertragung zwischen Zellverbinder und Leiterplatte und ist vergleichsweise (also in Relation zum zweiten, siehe unten) mechanisch starr und vergleichsweise kurz ausgeführt. Die Ausführung derart dient dazu, die gewünschten Eigenschaften (Befestigung, Übertragung, insbesondere physikalische Brücke, Thermobrücke) zu bewirken bzw. zu begünstigen. At least one, in particular all of the first and/or second (see below) of the connecting elements are designed in the form of strips over a large area. "Area-like strips" means that they have a particularly constant, comparatively low height in relation to their lateral and longitudinal extent. "Strip-like" can - viewed in the longitudinal direction of the strip - include straight, kinked, bent, angled, curved embodiments. Or to put it another way: the areal, strip-like connecting element runs in one plane. At least a first of the connecting elements leads to a first of the cell connectors. This (the first) is used for mechanical attachment and/or thermal transmission between the cell connector and circuit board and is comparatively (i.e. in relation to the second, see below) mechanically rigid and comparatively short. The implementation in this way serves to bring about or promote the desired properties (fixing, transmission, in particular physical bridge, thermal bridge).
Mindestens ein zweites der Verbindungselemente führt zu dem zweiten der Zellverbinder. Dieses (die zweiten) dient einem thermischen und/oder mechanischen (3D-)Län- genausgleich zwischen den Zellverbindern und/oder einem entsprechenden Ausgleich zwischen dem zweiten Zellverbinder und der Leiterplatte und ist vergleichsweise (in Relation zum ersten) mechanisch flexibel bzw. flexibler und vergleichsweise lang bzw. länger (wiederum in Längsrichtung des Streifens gesehen) ausgeführt. Auch hier dient die Ausführung derart dazu, die gewünschten Eigenschaften (3D-Längenausgleich bzw. -Nachgiebigkeit, insbesondere eine Zugentlastung) zu bewirken bzw. zu begünstigen. At least a second of the connecting elements leads to the second of the cell connectors. This (the second) is used for thermal and/or mechanical (3D) length compensation between the cell connectors and/or a corresponding compensation between the second cell connector and the circuit board and is comparatively (in relation to the first) mechanically flexible or more flexible and comparatively long or longer (again seen in the longitudinal direction of the strip). Here, too, the design serves to bring about or promote the desired properties (3D length compensation or flexibility, in particular strain relief).
Der - insbesondere 3D - "Längenausgleich" ist dabei im Sinne einer 3D-Nachgiebigkeit bzw. einer 3D-Beweglichkeit zu verstehen. Dies ist so zu verstehen, dass das Verbindungselement Bewegungen, Verschiebungen seiner Enden bzw. Fixierstellen in allen drei Raumrichtungen, also in 3D, ausgleichen bzw. diesen nachgeben kann. Dies wird insbesondere erreicht durch einen geschwungenen bzw. brückenförmigen bzw. U-förmigen oder S-förmigen Verlauf des Verbindungselements. Entsprechendes gilt auch für eine Formgebung für den weiter unten genannten Draht. The—particularly 3D—“length compensation” is to be understood in the sense of 3D flexibility or 3D mobility. This is to be understood in such a way that the connecting element can compensate for or yield to movements, displacements of its ends or fixing points in all three spatial directions, i.e. in 3D. This is achieved in particular by a curved or bridge-shaped or U-shaped or S-shaped profile of the connecting element. The same also applies to a shape for the wire mentioned below.
Die Leiterplatte weist außerdem mindestens eine Kommunikationsschnittstelle zum Datenaustausch von Informationen mit einer Gegenstelle auf. Informationen sind jegliche für ein Batteriemanagement nützliche oder notwendige Informationen, insbesondere solche über Ströme, Spannungen und Temperaturen der kontaktierten Batterie im Montagezustand bzw. im Betrieb der Batterie. Eine Kommunikation kann dabei ausgehend von der Leiterplatte in eine oder beide Richtungen (eingehend/ausgehend) erfolgen. Die Gegenstelle kann eine Kommunikationsschnittstelle einer anderen Leiterplatte (insbesondere einer anderen Elektronikkomponente) oder eine andere Gegenstelle innerhalb oder außerhalb des Zellkontaktiersystems sein, z.B. eine externe Auswerteeinheit, Zentralsteuerung etc. The circuit board also has at least one communication interface for data exchange of information with a remote station. Information is any information that is useful or necessary for battery management, in particular information about currents, voltages and temperatures of the contacted battery in the installed state or when the battery is in operation. Communication can take place in one or both directions (incoming/outgoing) starting from the printed circuit board. The remote station can be a communication interface of another printed circuit board (in particular another electronic component) or another remote station inside or outside the cell contacting system, e.g. an external evaluation unit, central controller, etc.
Die Elektronikkomponente weist also Verbindungselemente für genau zwei Zellverbinder auf. Die Elektronikkomponente dient damit der Auswertung des Zustandes einer Batterie in Bezug auf genau zwei von deren Zellverbindern. Damit kann z.B. die Spannung einer einzelnen Batteriezelle oder deren Temperatur, deren Impedanz, Stromleistung usw. ermittelt werden. In einer gesamten Batterie können so eine Reihe von derartigen Elektronikkomponenten platziert und kommunizierend miteinander verbunden werden, um die gesamte Batterie managen zu können. The electronic component therefore has connecting elements for exactly two cell connectors. The electronic component is used to evaluate the status of a battery with regard to exactly two of its cell connectors. This can be used, for example, to determine the voltage of an individual battery cell or its temperature, impedance, current output, etc. A number of such electronic components can thus be placed in an entire battery and connected to one another so that they can communicate in order to be able to manage the entire battery.
Auf der Leiterplatte werden insbesondere Messignale aus der Batterie (Spannungen, Ströme, Temperaturen etc.) empfangen oder erzeugt. Auf der Leiterplatte findet insbesondere eine Umwandlung solcher Messsignale in ein datenübertragbares Signal statt, um dieses über die Kommunikationsschnittstelle zu übertragen. In particular, measurement signals from the battery (voltages, currents, temperatures, etc.) are received or generated on the printed circuit board. In particular, a conversion of such measurement signals into a data-transmittable signal takes place on the printed circuit board in order to transmit this via the communication interface.
Gemäß der Erfindung ergibt sich das Einbringen/Integrieren einer Leiterplatte in das Zellkontaktiersystem, welche eine elektrische Weiterleitung / Verarbeitung von Messsignalen ausführt. Das Zellkontaktiersystem mit den elektronischen Komponenten (Leiterplatte etc.) wird durch die Kommunikationsschnittstelle so erweitert, dass ein Datenübertragungssystem (leitungsgebunden oder per Funk) für die Kommunikation zwischen einzelnen Leiterplatten bzw. Zellen eines Moduls und zwischen mehreren Batteriemodulen verwendet werden kann. According to the invention, a printed circuit board is introduced/integrated into the cell contacting system, which carries out electrical transmission/processing of measurement signals. The cell contacting system with the electronic components (printed circuit board, etc.) is expanded by the communication interface in such a way that a data transmission system (wired or wireless) can be used for communication between individual printed circuit boards or cells of a module and between several battery modules.
Gemäß der Erfindung ergibt sich ein Verbindungselement von der Leiterplatte zu den Zellverbindern, das flach ist und optional korrosionsgeschützt ausgeführt werden kann, die Funktion einer 3D-Nachgiebigkeit bzw. Zugentlastung (Flexibilität) erfüllt und eine physikalische Brücke (da relativ starr und kurz, z.B. Thermobrücke) zwischen Zellverbinder und Leiterplatte darstellt, insbesondere zu einer Sensorstelle auf der Leiterplatte als sensorisches Element. Durch eine optionale partielle Beschichtung des Grundmaterials wird die direkte Anbindung sowohl auf dem Lastpfad (Zellverbinder) als auch auf der Leiterplatte (PCB, printed circuit board) gewährleistet. According to the invention, there is a connecting element from the printed circuit board to the cell connectors, which is flat and can optionally be designed to be protected against corrosion, fulfills the function of 3D compliance or strain relief (flexibility) and a physical bridge (because it is relatively rigid and short, e.g. thermal bridge ) between the cell connector and the printed circuit board, in particular to a sensor location on the printed circuit board as a sensory element. An optional partial coating of the base material ensures direct connection both to the load path (cell connector) and to the printed circuit board (PCB).
Gemäß der Erfindung ist es möglich, eine Montage der Leiterplatte (PCB, Printed Circuit Board / Löten) erst nach Verbinden des Zellkontaktiersystems (ZKS) auf die Batterie (Zelle / Schweißen) vorzunehmen. Insbesondere ergibt sich ein Aluminium- Verbindungselement als Stanzteil, sowie ein solches, das als physikalische Brücke dient. Insbesondere kann das Aluminium-Verbindungselement bereits korrosionsgeschützt ausgeführt werden (siehe unten). Eine selektive (z.B. in einem Lötbereich) Beschichtung (insbesondere Zinnbeschichtung) des Verbindungselements (insb. Aluminium) ermöglicht das Kontaktieren an die Leiterplatte (PCB / FPC flexible printed circuit, Löten von zinnbeschichtetem Aluminium auf Lötfläche, insbesondere Kupfer). Außerdem ermöglicht es eine geeignete Materialpaarung bei der Kontaktierung von Zellverbindern (Verbindungselement als Aluminium unbeschichtet auf dem Aluminium des Zellverbinders). According to the invention, it is possible to mount the printed circuit board (PCB, Printed Circuit Board/soldering) only after connecting the cell contacting system (ZKS) to the battery (cell/welding). In particular, an aluminum connecting element results as a stamped part, as well as one that serves as a physical bridge. In particular, the aluminum connecting element can already be protected against corrosion (see below). A selective (e.g. in a soldering area) coating (in particular tin coating) of the connecting element (in particular aluminum) enables contact to the printed circuit board (PCB / FPC flexible printed circuit, soldering of tin-coated aluminum on the soldering surface, in particular copper). It also enables a suitable pairing of materials when contacting cell connectors (connecting element as aluminum uncoated on the aluminum of the cell connector).
Eine Reihenfolge beim Prozessieren (Herstellung eines Zellkontaktiersystems / Batteriemoduls) kann günstig für die Wärmeeinträge (Löten: hoch / Laserschweißen: gering) gewählt werden, sodass zum Beispiel eine vorher ausgeführte Lötstelle beim späteren Schweißen nicht wieder erweicht. A processing sequence (manufacturing a cell contact system / battery module) can be chosen favorably for the heat input (soldering: high / laser welding: low), so that, for example, a soldered joint previously made does not soften again during later welding.
Verbindungselemente (insbesondere die zweiten, aber auch Drähte, zum Beispiel als Kommunikationsmedium, siehe unten) erlauben eine 3D-Nachgiebigkeit bzw. Zugentlastung für thermische Bewegungen. Insbesondere die Drahtverlegung (z.B. eines Cu- Lackdrahtes) als Bus-Übertragungsmedium erlaubt thermische Bewegungen durch 3D- Nachgiebigkeit bzw. Zugentlastungen. Eine Datenübertragung kann im ZKS (Zellkontaktiersystem) selbst und zwischen ZKS bis zu einer Gegenstelle / Auswerteinheit etc. beliebig gestaltet werden. Connection elements (especially the second, but also wires, for example as a communication medium, see below) allow 3D flexibility or strain relief for thermal movements. In particular, laying the wire (e.g. enamelled copper wire) as a bus transmission medium allows thermal movements through 3D flexibility or strain relief. A data transfer can be designed in any way in the ZKS (cell contacting system) itself and between the ZKS and a remote station/evaluation unit etc.
Gemäß der Erfindung ergibt sich die Integration einer elektronischen Komponente (Leiterplatte mit entsprechenden Komponenten) in das Zellkontaktiersystem, welche die Messsignale der Signalleitungen (Verbindungselemente) in ein für Datenübertragungssysteme (Übertragung über die Kommunikationsschnittstelle) verwendbares Signal (z.B. Digitalsignal) umwandelt. Es ergibt sich die Möglichkeit der Integration eines Datenübertragungssystems (z.B. BUS, leitungsgeführt oder drahtlos) in das ZKS. According to the invention, an electronic component (printed circuit board with corresponding components) is integrated into the cell contacting system, which converts the measurement signals of the signal lines (connecting elements) into a signal that can be used for data transmission systems (transmission via the communication interface). (e.g. digital signal) converts. There is the possibility of integrating a data transmission system (e.g. BUS, wired or wireless) into the ZKS.
Es ergibt sich optional eine selektive Beschichtung im (insbesondere Löt-) Bereich des Verbindungselements, um eine Aluminium-Kupfer-Verbindung zu ermöglichen. Es ergibt sich die optionale Möglichkeit einer indirekten thermischen Übertragung zur Leiterplatte durch das Verbindungselement, ohne einen NTC-Baustein (negative temperature coefficient) direkt auf dem Zellverbinder platzieren zu müssen. There is an optional selective coating in the (particularly soldering) area of the connecting element in order to enable an aluminum-copper connection. There is the optional possibility of indirect thermal transmission to the circuit board through the connecting element, without having to place an NTC component (negative temperature coefficient) directly on the cell connector.
Die Erfindung beruht auf der Erkenntnis, dass in den aktuell aus der Praxis bekannten Produkten (Zellkontaktiersysteme) zur Signalleitung elektromechanische Leitungssysteme verwendet werden. Die Signalverarbeitung wird extern (also außerhalb des ZKS) realisiert. Die Anbindung von Sensoren erfolgt direkt auf den zu beobachtenden Bauteilen abgesetzt von der Verarbeitungselektronik. Analoge (Mess-)Signale werden mittels FPC oder Cu-Leiter mit Steckverbindungen realisiert. Die Kontrolleinheit/PCB ist meist extern angeordnet. The invention is based on the finding that in the products (cell contacting systems) currently known from practice, electromechanical line systems are used for signal transmission. The signal processing is implemented externally (i.e. outside the ZKS). Sensors are connected directly to the components to be monitored, remote from the processing electronics. Analog (measuring) signals are implemented using FPC or Cu conductors with plug connections. The control unit/PCB is usually located externally.
Gemäß der Erfindung ergibt sich eine Alternative zu den aus der Praxis bekannten bestehenden Lösungen für die Weiterleitung physikalischer Zustandsgrößen von und zwischen Batteriekomponenten zu einer dezentralen Signalauswertung oder Verarbeitung ohne Verkabelung der Einzelkomponenten. Es ergibt sich eine Funktionsintegration von separaten Teilbaugruppen und Sensoriken. According to the invention, there is an alternative to the existing solutions known from practice for forwarding physical state variables from and between battery components to a decentralized signal evaluation or processing without wiring the individual components. The result is a functional integration of separate subassemblies and sensors.
Es ergibt sich eine Integration von Elektronik in Zellkontaktiersysteme (Single-/Mul- ticell-Design). Es ergibt sich eine Anbindung von Elektronik an Alu-Sense-Punkte (die Stelle des Zellverbinders, die zu vermessen ist). Es ergibt sich eine Erweiterung von Zellkontaktiersystemen um eine oder mehrere elektrisch leitende Komponenten, welche die Weiterleitung und Verschaltung von Signal- und Sensorleitungen innerhalb von Batteriesystemen zur weiteren Verarbeitung ermöglicht. The result is an integration of electronics in cell contacting systems (single/multicell design). The result is a connection of electronics to aluminum sense points (the point of the cell connector that is to be measured). The result is an extension of cell contacting systems by one or more electrically conductive components, which enables the forwarding and connection of signal and sensor lines within battery systems for further processing.
In einer bevorzugten Ausführungsform der Erfindung weist mindestens eines der Verbindungselemente eine selektive Beschichtung in einem mit der Lötfläche zu verlötenden Lötbereich auf. "Selektiv" bedeutet hier, dass die Beschichtung auf einen entsprechenden Bereich des Verbindungselements begrenzt ist. Insbesondere ist dies genau der Lötbereich, eventuell erweitert um einen Toleranzbereich / Umgebung des Lötbereiches, die zum Beispiel so gewählt ist, dass ein Löten unter Einbeziehung aller Toleranzen sicher innerhalb des Bereiches der Beschichtung erfolgt. Somit ergibt sich eine sichere Verlötung zwischen Leiterplatte und Verbindungselement. In a preferred embodiment of the invention, at least one of the connecting elements has a selective coating in a soldering area to be soldered to the soldering surface. "Selective" here means that the coating is limited to a corresponding area of the connecting element. In particular, this is accurate the soldering area, possibly extended by a tolerance range/surroundings of the soldering area, which is selected, for example, in such a way that soldering takes place safely within the area of the coating, taking all tolerances into account. This results in secure soldering between the printed circuit board and the connecting element.
In einer bevorzugten Ausführungsform ist zumindest ein Übergangsbereich zwischen dem Grundmaterial des Verbindungselements und der Beschichtung gegen Korrosion abgedichtet. Somit ergibt sich ein Korrosionsschutz des Verbindungselements. Die Abdichtung erfolgt insbesondere soweit bzw. derart, dass unter Berücksichtigung sämtlicher Toleranzen das mit der Leiterplatte fertig verlötete Verbindungselement gänzlich und sicher vor Korrosion geschützt ist. In a preferred embodiment, at least one transition area between the base material of the connecting element and the coating is sealed against corrosion. This results in protection against corrosion for the connecting element. The sealing takes place in particular to the extent or in such a way that, taking into account all tolerances, the connecting element that is completely soldered to the printed circuit board is completely and reliably protected against corrosion.
In einer bevorzugten Ausführungsform besteht mindestens eines der Verbindungselemente aus Aluminium (insbesondere als Grundmaterial). Für den Fall, dass eine oben genannte Beschichtung vorgesehen ist, ist alternativ oder zusätzlich die Beschichtung eine Zinnbeschichtung. Insbesondere lässt sich mit Zinn beschichtetes Aluminium (als optionales Grundmaterial des Verbindungselements) besonders gut mit Kupfer (als optionalem Material der Lötfläche) verlöten. In a preferred embodiment, at least one of the connecting elements consists of aluminum (in particular as the base material). If an above-mentioned coating is provided, the coating is alternatively or additionally a tin coating. In particular, aluminum coated with tin (as an optional base material of the connecting element) can be soldered particularly well to copper (as an optional material for the soldering surface).
In einer bevorzugten Ausführungsform ist mindestens eines, vorzugsweise alle ersten und/oder zweiten, der Verbindungselemente ein Stanzteil aus einer Blechplatte. Die Blechplatte ist insbesondere eine Aluminiumplatte. So lassen sich besonders gut Verbindungselemente einheitlicher Dicke, streifenartig und flächenhaft (was sich als Blechabschnitt bei einem Blech einheitlicher Dicke insbesondere automatisch ergibt) herstellen. In a preferred embodiment, at least one, preferably all of the first and/or second, of the connecting elements is a stamped part made from a sheet metal plate. The sheet metal plate is in particular an aluminum plate. In this way, connecting elements of uniform thickness can be produced particularly well, in strips and over a large area (which results in particular automatically as a sheet metal section in the case of a sheet metal of uniform thickness).
In einer bevorzugten Ausführungsform enthält die Leiterplatte einen Temperaturfühler, der fest auf der Leiterplatte angebracht ist. Außerdem ist der Temperaturfühler thermisch an die Lötfläche für das erste Verbindungselement gekoppelt angebracht. Insbesondere ist der Temperaturfühler so nahe, so eng und so gut thermisch gekoppelt wie möglich an der Lötfläche angeordnet, insbesondere unmittelbar an diese angrenzend, unterhalb dieser usw. Somit ergibt sich durch den Temperaturfühler eine Sensorstelle auf der Leiterplatte, die thermisch bestmöglich über die Lötfläche und das montierte Verbindungselement an den Zellverbinder gekoppelt ist, ohne die Notwendigkeit, einen Temperaturfühler extern von der Leiterplatte direkt auf dem Zellverbinder platzieren zu müssen. In a preferred embodiment, the circuit board contains a temperature sensor that is fixedly attached to the circuit board. In addition, the temperature sensor is attached thermally coupled to the soldering surface for the first connection element. In particular, the temperature sensor is arranged as close, as close and thermally coupled as possible to the soldering surface, in particular directly adjacent to it, below it, etc. The temperature sensor thus results in a sensor point on the circuit board that is thermally optimal over the soldering surface and the assembled connector is coupled to the cell connector without the need for a Having to place temperature sensors externally from the circuit board directly on the cell connector.
In einer bevorzugten Ausführungsform weist mindestens eines der ersten Verbindungselemente eine Rechteckform auf. Eine derartige Form ist besonders einfach, als flä- chenhafter Streifen bzw. Zunge, insbesondere als Stanzteil, herstellbar. In a preferred embodiment, at least one of the first connecting elements has a rectangular shape. Such a shape is particularly easy to produce as a flat strip or tongue, in particular as a stamped part.
In einer bevorzugten Ausführungsform ist mindestens eines der zweiten Verbindungselemente (wieder in der Ebene bzw. entlang seiner flächig streifenartigen Erstreckung) S-förmig ausgeführt. Mit anderen Worten handelt es sich um einen S-förmig verlaufenden Streifen oder Band. Das Verbindungselement weist einen geraden Mittelschenkel auf. An je einem Ende des Mittelschenkels schließt sich mit einer 180°-Wendung ein Teilschenkel an. Die beiden Teilschenkel verlaufen daher parallel zum Mittelschenkel, einer auf der einen, der andere auf der anderen Seite des Mittelschenkels. An den wiederum entfernten Enden der Mittelschenkel schließen sich jeweilige Zufuhrschenkel an, die senkrecht, also mit einer 90°-Wendung, von den Teilschenkeln abzweigen, also rechtwinklig zum Mittelschenkel und den Teilschenkeln und von diesen weg verlaufen. Die Teilschenkel weisen nur eine Teillänge, insbesondere die halbe Länge des Mittelschenkels auf. Das entsprechende Verbindungselement ist insbesondere dadurch erzeugt, dass gerade Längsschnitte die Teilschenkel vom Mittelschenkel trennen, die insbesondere in runden Freischnitten zur Spannungsentlastung enden. Auch an den Abzweigungen der Zufuhrschenkel von den Teilschenkeln sind insbesondere entsprechend runde Freischnitte vorgesehen. Das entsprechende Verbindungselement ist besonders einfach als Blech-Stanzteil ausführbar. In a preferred embodiment, at least one of the second connecting elements is S-shaped (again in the plane or along its flat, strip-like extension). In other words, it is an S-shaped strip or band. The connecting element has a straight center leg. At each end of the middle leg, a partial leg follows with a 180° turn. The two partial legs therefore run parallel to the central leg, one on one side and the other on the other side of the central leg. The ends of the central limbs that are in turn remote are connected to respective supply limbs, which branch off perpendicularly, ie with a 90° turn, from the partial limbs, ie at right angles to the central limb and the partial limbs and run away from them. The partial legs only have a partial length, in particular half the length of the middle leg. The corresponding connecting element is produced in particular in that straight longitudinal cuts separate the partial limbs from the central limb, which end in particular in round free cuts for stress relief. Correspondingly round free cuts are also provided, in particular, at the branches of the feed limbs from the partial limbs. The corresponding connecting element can be implemented particularly easily as a stamped sheet metal part.
In einer bevorzugten Ausführungsform weist die Kommunikationsschnittstelle mindestens ein Aufnahmemittel für einen Draht als zumindest Teil eines Kommunikationskanals bzw. als Übertragungsmedium für die Kommunikation auf. Der Kommunikationskanal ist insbesondere aus zwei, drei oder vier Drähten gebildet. Das Aufnahmemittel ist insbesondere ein Gabelkontakt. Der Draht oder Verbindungsdraht ist insbesondere als Cu-Lackdraht ausgeführt. Aufnahmemittel und Draht bilden zusammen einen Drahtabschnitt. Der Drahtabschnitt enthält das Aufnahmemittel, insbesondere wenigstens eine Klemmgabel für einen Verbindungsdraht, und den von der Klemmgabel zur Gegenstelle führenden Verbindungsdraht. Der Verbindungsdraht ist insbesondere ein Lackdraht, insbesondere ein Cu-Lackdraht. Durch die Drahtverlegung ist vor allem eine einfache Anpassung an Montagegegebenheiten möglich. Der Draht ist insbesondere an sich flexibel genug, um einen thermischen oder mechanischen (Vibrationen, Bewegungen) (3D-)Längenausgleich, wie oben erläutert, zwischen Kommunikationsschnittstelle und Gegenstelle zu gewährleisten. In a preferred embodiment, the communication interface has at least one receiving means for a wire as at least part of a communication channel or as a transmission medium for the communication. The communication channel is formed in particular from two, three or four wires. The receiving means is in particular a fork contact. The wire or connecting wire is designed in particular as enamelled copper wire. Recording means and wire together form a wire section. The wire section contains the receiving means, in particular at least one clamping fork for a connecting wire, and the connecting wire leading from the clamping fork to the opposite station. The connecting wire is in particular an enameled wire, in particular a copper enameled wire. By laying the wire is above all one easy adaptation to assembly conditions possible. In particular, the wire itself is flexible enough to ensure thermal or mechanical (vibrations, movements) (3D) length compensation, as explained above, between the communication interface and the remote station.
In einer alternativen Ausführungsform erfolgt die Kommunikation per Funk. In an alternative embodiment, the communication takes place by radio.
In einer bevorzugten Ausführungsform ist mindestens eines der Verbindungselemente ein einstückiger Direktverbinder zwischen Leiterplatte und Zellverbinder. Insbesondere die oben genannten Stanzteile lassen sich besonders gut einstückig herstellen. In a preferred embodiment, at least one of the connecting elements is a one-piece direct connector between the printed circuit board and the cell connector. In particular, the stamped parts mentioned above can be produced particularly well in one piece.
In einer bevorzugten Ausführungsform ist die Leiterplatte in einem Montagezustand im Zellkontaktiersystem ausschließlich vermittels der Verbindungselemente mechanisch an den Zellverbindern und dadurch im Zellkontaktiersystem befestigt. Die Leiterplatte muss dann nicht gesondert mechanisch gehalten werden. Insbesondere ergibt sich so eine Doppelfunktionalität für das erste Verbindungselement als thermische Brücke und mechanisches Befestigungselement, ggf. auch für das zweite Verbindungselement als thermischer / mechanischer (3D-)Längenausgleich und Befestigungselement. In a preferred embodiment, in an assembled state in the cell contacting system, the printed circuit board is mechanically attached to the cell connectors and thereby in the cell contacting system exclusively by means of the connecting elements. The printed circuit board then does not have to be held separately mechanically. In particular, this results in a dual functionality for the first connecting element as a thermal bridge and mechanical fastening element, possibly also for the second connecting element as a thermal/mechanical (3D) length compensation and fastening element.
Die Aufgabe der Erfindung wird auch gelöst durch ein Zellkontaktiersystem gemäß Patentanspruch 12. Das Zellkontaktiersystem und zumindest ein Teil dessen Ausführungsformen sowie die jeweiligen Vorteile wurden sinngemäß bereits im Zusammenhang mit der erfindungsgemäßen Elektronikkomponente erläutert. The object of the invention is also achieved by a cell contacting system according to patent claim 12. The cell contacting system and at least some of its embodiments and the respective advantages have already been explained in connection with the electronic component according to the invention.
Das Zellkontaktiersystem enthält eine Mehrzahl von Zellverbindern, die zur Leistungskontaktierung von Batteriezellen dienen, und mindestens eine erfindungsgemäße Elektronikkomponente. In einem entsprechenden Zellkontaktiersystem ist die Anzahl, Lage, Gestalt, Geometrie, Relativposition zueinander usw. von Zellverbindern und sonstigen Strukturteilen bekannt. Insbesondere ist so die Anpassung einer Elektronikkomponente an ein konkretes und nicht nur bestimmungsgemäßes Zellkontaktiersystem möglich. Insbesondere sind bei einer Anzahl von n Zellverbindern n-1 Elektronikkomponenten vorgesehen, die stets zwei der n Zellverbinder miteinander verbinden, so dass z.B. alle Teilspannungen zwischen allen Zellverbindern ermittelbar sind. Die Aufgabe der Erfindung wird auch gelöst durch ein Verfahren gemäß Patentanspruch 13 zum Herstellen eines erfindungsgemäßen Zellkontaktiersystems. Bei dem Verfahren wird bzw. werden die erfindungsgemäßen Elektronikkomponenten im noch unmontierten Zustand, also als Einzelteile bzgl. Leiterplatte und Verbindungselementen, bereitgestellt. Zuerst werden dann die elektrischen Verbindungselemente mit der Leiterplatte durch Löten verbunden. Anschließend werden die elektrischen Verbindungselemente mit den Zellverbindern verbunden, insbesondere durch Schweißen. Wie oben erläutert, erfolgt durch den geringeren Wärmeeintrag beim späteren Schweißen kein Aufweichen der bereits vorher fertig gestellten Lötstellen. The cell contacting system contains a plurality of cell connectors, which are used for power contacting of battery cells, and at least one electronic component according to the invention. In a corresponding cell contacting system, the number, location, shape, geometry, relative position to one another, etc. of cell connectors and other structural parts is known. In particular, it is possible in this way to adapt an electronic component to a specific and not just intended cell contacting system. In particular, with a number of n cell connectors, n−1 electronic components are provided, which always connect two of the n cell connectors with one another, so that, for example, all partial voltages between all cell connectors can be determined. The object of the invention is also achieved by a method according to patent claim 13 for producing a cell contacting system according to the invention. In the method, the electronic components according to the invention are or are provided in a still unassembled state, that is to say as individual parts with regard to the printed circuit board and connecting elements. First, the electrical connection elements are then connected to the printed circuit board by soldering. The electrical connection elements are then connected to the cell connectors, in particular by welding. As explained above, due to the lower heat input during later welding, there is no softening of the soldered joints that have already been completed.
Die Aufgabe der Erfindung wird auch gelöst durch ein Verfahren gemäß Patentanspruch 14 zum Herstellen eines Batteriemoduls. Das Batteriemodul enthält eine Batterie und ein die Batterie kontaktierendes, erfindungsgemäßes Zellkontaktiersystem. Bei dem Verfahren wird bzw. werden die erfindungsgemäßen Elektronikkomponenten wie oben als Einzelteile bereitgestellt. Getrennt hiervon werden das bzw. die restlichen erfindungsgemäßen Zellkontaktiersysteme (ohne Elektronikkomponenten) bereitgestellt. Zuerst wird das Zellkontaktiersystem ohne die Elektronikkomponenten mit der Batterie verbunden. Anschließend werden die Leiterplatten mit den Zellverbindern vermittels der Verbindungselemente elektrisch verbunden, insbesondere gemäß dem erfindungsgemäßen Verfahren, wie es oben erläutert wurde. The object of the invention is also achieved by a method according to patent claim 14 for producing a battery module. The battery module contains a battery and a cell contacting system according to the invention that contacts the battery. In the method, the electronic components according to the invention are provided as individual parts as above. The remaining cell contacting system(s) according to the invention (without electronic components) are provided separately from this. First, the cell contact system is connected to the battery without the electronic components. The printed circuit boards are then electrically connected to the cell connectors by means of the connecting elements, in particular according to the method according to the invention, as explained above.
Die Erfindung beruht auf folgenden Erkenntnissen, Beobachtungen bzw. Überlegungen und weist noch die nachfolgenden Ausführungsformen auf. Die Ausführungsformen werden dabei teils vereinfachend auch "die Erfindung" genannt. Die Ausführungsformen können hierbei auch Teile oder Kombinationen der oben genannten Ausführungsformen enthalten oder diesen entsprechen und/oder gegebenenfalls auch bisher nicht erwähnte Ausführungsformen einschließen. The invention is based on the following findings, observations and considerations and also has the following embodiments. The embodiments are sometimes also referred to as “the invention” for the sake of simplicity. The embodiments can also contain parts or combinations of the above-mentioned embodiments or correspond to them and/or optionally also include embodiments that have not been mentioned before.
Gemäß der Erfindung sind Stanzteile aus Aluminium als Verbindungselemente möglich, die Stanzteile können in einem Stanzband angebunden sein. Eine selektive Beschichtung des Verbindungselements mit Zinn ist möglich, außerdem eine selektive Abdeckung des Beschichtungsübergangs zur Korrosionsprotektion. Es ergibt sich eine Integration eines Längen- und Vibrationsausgleichs über die Formgebung der Verbin- dungselemente, insbesondere über deren Stanzgeometrie. Eine Anbindung (Leiterplatte an Zellverbinder / Verbindungselement) über einen Lötprozess an PCB, Flex PCB oder Starr-Flex PCB ist möglich. Eine automatische Verarbeitung auf Bestückungsmaschinen ist möglich. Die Erfindung findet Einsatz zur Anbindung einer ZKS- Steuer-Elektronik an die Zellverbinder. Eine Übertragung eines Temperatursignals erfolgt insbesondere durch eine geeignete Gestaltung des ersten Verbindungselements, insbesondere als Alu-Stanzteil. Eine Laserschweißverbindung ist möglich durch den Einsatz von Aluminium (Alu) Material beim Verbindungselement. Damit entsteht Materialgleichheit (des Verbindungselements) zu den Zellverbindern (üblicherweise auch aus Auminium) im ZKS. According to the invention stamped parts made of aluminum are possible as connecting elements, the stamped parts can be connected in a stamped strip. A selective coating of the connecting element with tin is possible, as well as a selective covering of the coating transition to protect against corrosion. The result is an integration of a length and vibration compensation via the shape of the connection tion elements, in particular via their punching geometry. A connection (PCB to cell connector / connecting element) via a soldering process to PCB, flex PCB or rigid-flex PCB is possible. Automatic processing on placement machines is possible. The invention is used to connect ZKS control electronics to the cell connectors. A temperature signal is transmitted in particular by a suitable design of the first connecting element, in particular as an aluminum stamped part. A laser welded connection is possible through the use of aluminum (alu) material in the connecting element. This creates the same material (of the connecting element) as the cell connectors (usually also made of aluminum) in the ZKS.
Es ergibt sich insbesondere ein Alu-Stanzteil als Verbindungselement des PCB zum Sensing Point (gewünschter Messpunkt für Spannung, Temperatur, Strom etc.) auf dem Zellverbinder. Eine selektive Zinnbeschichtung am Verbindungselement ermöglicht die Materialgleichheit (des Grundmaterials des Verbindungselements) bei einer Laserschweißung zum Zellverbinder. Ein Korrosionsschutz kann schon auf dem Einzelteil (Verbindungselement / Leiterplatte mit Verbindungselement) aufgebracht werden. Die Erstellung eines Bussystems innerhalb des ZKS-Moduls durch Cu-Lackdraht ist möglich. Neben der Übertragung von Spannung/Strom bzw. entsprechenden Messgrößen kann das Verbindungselement (Stanzteil) auch die Temperatur zur Leiterplatte übertragen. In particular, a stamped aluminum part results as a connecting element of the PCB to the sensing point (desired measuring point for voltage, temperature, current, etc.) on the cell connector. A selective tin coating on the connecting element enables the same material (the base material of the connecting element) to be used with a laser weld to form the cell connector. Corrosion protection can already be applied to the individual part (connecting element / printed circuit board with connecting element). It is possible to create a bus system within the ZKS module using enamelled copper wire. In addition to transmitting voltage/current or the corresponding measured variables, the connecting element (stamped part) can also transmit the temperature to the printed circuit board.
Weitere Merkmale, Wirkungen und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung sowie der beigefügten Figuren. Dabei zeigen, jeweils in einer schematischen Prinzipskizze: Further features, effects and advantages of the invention result from the following description of a preferred exemplary embodiment of the invention and the attached figures. Show, each in a schematic principle sketch:
Figur 1 eine Elektronikkomponente in Schrägansicht, FIG. 1 shows an electronic component in an oblique view,
Figur 2 ein Zellkontaktiersystem mit vier Elektronikkomponenten gemäß Fig. 1 FIG. 2 shows a cell contacting system with four electronic components according to FIG
Figur 1 zeigt eine Elektronikkomponente 2 für ein Zellkontaktiersystem 4. Figure 1 shows an electronic component 2 for a cell contacting system 4.
Figur 2 zeigt vier (n-1 , siehe unten) der Elektronikkomponenten 2 aus Figur 1 in ihrem Montagezustand im Zellkontaktiersystem 4. Das Zellkontaktiersystem 4 enthält eine Mehrzahl n, hier fünf, Stück (6a-e) von Zellverbindern 6. Die Zellverbinder 6a-e dienen zur Leistungskontaktierung von in den Figuren nicht dargestellten Batteriezellen einer Batterie. Bei der nicht dargestellten Endmontage eines Batteriesystems wird das Zellkontaktiersystem 4 auf der Batterie montiert, indem unter anderem die Zellverbinder 6a-i mit den Batteriepolen verschweißt werden. FIG. 2 shows four (n-1, see below) of the electronic components 2 from FIG. e serve for power contacting of battery cells not shown in the figures of a battery. In the final assembly of a battery system, not shown, the cell contacting system 4 is mounted on the battery by, among other things, the cell connectors 6a-i being welded to the battery poles.
Die Elektronikkomponente 2 enthält eine Leiterplatte 8. Diese ist Teil einer in den Figuren nicht näher dargestellten Managementanordnung, um ein Batteriemanagement an der Batterie bei deren Betrieb zu realisieren. Die Leiterplatte 8 enthält im Beispiel zwei Lötflächen 10a, b, hier in Form von Kupfer (Cu)-Flächen. Die Lötflächen 10a, b dienen zur elektrischen Verbindung der Leiterplatten 8 mit den Zellverbindern 6a-e über hier jeweils zwei Verbindungselemente 12a, b. Die beiden Verbindungselemente 12a, b sind ebenfalls Teil der jeweiligen Elektronikkomponente 2. The electronic component 2 contains a printed circuit board 8. This is part of a management arrangement, not shown in detail in the figures, in order to implement battery management on the battery during its operation. In the example, the printed circuit board 8 contains two soldering areas 10a, b, here in the form of copper (Cu) areas. The soldering surfaces 10a, b are used to electrically connect the circuit boards 8 to the cell connectors 6a-e via two connecting elements 12a, b in this case. The two connecting elements 12a, b are also part of the respective electronic component 2.
Jedes der Verbindungselemente 12a, b ist hier einpolig ausgeführt und weist an seinem jeweiligen, im Montagezustand der Leiterplatte 8 zugewandten Ende einen Lötbereich 18a, b auf, der in den Figuren nur gestrichelt angedeutet und nicht sichtbar und ist, da er sich an der in der Darstellung nach unten zeigenden Unterseite der Verbindungselemente 12a, b befindet und mit den Lötflächen 10a, b bereits verlötet ist. Each of the connecting elements 12a, b has a single-pole design and has a soldering area 18a, b on its respective end facing the printed circuit board 8 in the assembled state, which is only indicated in the figures by dashed lines and is not visible, since it is located on the Representation downward-pointing underside of the connecting elements 12a, b is located and already soldered to the soldering pads 10a, b.
Die Verbindungselemente 12a, b sind flächenhaft ausgeführt, nämlich als (im Verhältnis zu ihrer flächigen Querausdehnung relativ dünne) Aluminium (Alu)-Bleche, und sind streifenartig ausgeführt: Die Verbindungselemente 12a sind gerade Streifen in Rechteckform, die Verbindungselemente 12b sind S-förmig verlaufende Streifen mit einer jeweiligen Verbreiterung an ihren Enden. The connecting elements 12a, b are designed to be two-dimensional, namely as aluminum (aluminum) sheets (relatively thin in relation to their areal transverse extent), and are designed in the form of strips: the connecting elements 12a are straight strips in a rectangular shape, the connecting elements 12b are S-shaped Strips with a respective broadening at their ends.
Die Verbindungselemente 12a zu einem jeweils ersten der Zellverbinder (6b, d) sind für eine mechanische Befestigung und thermische Übertragung zwischen Zellverbinder 6b, d und Leiterplatte 8 vergleichsweise (im Vergleich zu den Verbindungselementen 12b) mechanisch starr und vergleichsweise kurz ausgeführt. The connecting elements 12a to a respective first of the cell connectors (6b, d) are designed to be mechanically rigid and comparatively short for mechanical attachment and thermal transmission between cell connectors 6b, d and circuit board 8 (compared to the connecting elements 12b).
Die Verbindungselemente 12b zu einem jeweils zweiten der Zellverbinder (6a,c,e) sind für einen thermischen und/oder mechanischen 3D-Längenausgleich zwischen den Zellverbindern 6a-e und/oder zwischen dem zweiten Zellverbinder (6a,c,e) und der Leiterplatte 8 vergleichsweise (im Vergleich zu den Verbindungselementen 12a) mechanisch flexibel und lang ausgeführt. Im Beispiel wird dies dadurch erreicht, dass die Länge durch den Verlauf des Streifens entlang einer S-Form, also zwei mal 90° und zwei mal 180°-Richtungsänderung, vergrößert ist. So sind ein gerader Mittelschenkel 36, daran mit 180° Richtungsänderung anschließend beidseitig je ein hierzu paralleler halblanger Teilschenkel 38a, b, und beidseitig hierzu jeweils vom Teilschenkel rechtwinklig abzweigend (90°-Richtungsänderung) ein Zufuhrschenkel 40a, b vorgesehen. The connecting elements 12b to a second cell connector (6a,c,e) are for thermal and/or mechanical 3D length compensation between the cell connectors 6a-e and/or between the second cell connector (6a,c,e) and the printed circuit board 8 comparatively (compared to the connecting elements 12a) mechanically flexible and long. In the example, this is achieved in that the length is increased by running the strip along an S-shape, i.e. changing direction twice by 90° and twice by 180°. A straight central leg 36 is provided, with a 180° change in direction then on both sides a half-length partial leg 38a, b parallel thereto, and on both sides of this a feed leg 40a, b branching off at right angles from the partial leg (90° change in direction).
Die Flexibilität der Struktur wird durch die Länge des Streifens und die Biegefähigkeit der Struktur an den jeweiligen vier Abwinklungen / Richtungsänderungen erreicht, die unter anderem hierzu außerdem mit runden Freischnitten 42 versehen sind. The flexibility of the structure is achieved by the length of the strip and the flexibility of the structure at the respective four bends/changes in direction, which are also provided with round cutouts 42 for this purpose, among other things.
Die Leiterplatte 8 weist außerdem im Beispiel eine Kommunikationsschnittstelle 22 auf, die ebenfalls Teil der Elektronikkomponente 2 ist. Jede der Kommunikationsschnittstellen 22 ist hier in Form von zwei an der Leiterplatte 8 angeschlossenen Aufnahmemitteln 24 für Draht 28 in Form von Gabelkontakten ausgeführt. Die Gabelkontakte sind an der Leiterplatte 8 angeschlossen bzw. mechanisch fest mit dieser verbunden. Jedes der Aufnahmemittel 24 dient der elektrisch kontaktierenden und mechanisch befestigenden Aufnahme von einem Draht 28, hier Cu-Lackdraht. Die Kommunikation erfolgt dann über die entsprechenden Drähte 28 als elektrische Kommunikationsleitung / Kommunikationsmedium bzw. Bussystem 44 zum Datenaustausch mit einer Gegenstelle 26, hier einer Kommunikationsschnittstelle 22 einer weiteren Leiterplatte 8. Die Drähte 28 bilden damit einen Kommunikationskanal 30 des Bussystems 44. The printed circuit board 8 also has a communication interface 22 in the example, which is also part of the electronic component 2 . Each of the communication interfaces 22 is designed here in the form of two receiving means 24 for wire 28 in the form of fork contacts connected to the printed circuit board 8 . The fork contacts are connected to the printed circuit board 8 or are mechanically connected to it. Each of the receiving means 24 is used for electrically contacting and mechanically fastening receiving of a wire 28, here enamelled copper wire. Communication then takes place via the corresponding wires 28 as an electrical communication line/communication medium or bus system 44 for data exchange with a remote station 26, here a communication interface 22 of a further printed circuit board 8. The wires 28 thus form a communication channel 30 of the bus system 44.
Die Verbindungselemente 12a, b sind im Beispiel einstückige Direktverbinder zwischen Leiterplatte 8 und dem jeweiligen Zellverbinder 6a-e. In the example, the connecting elements 12a, b are one-piece direct connectors between the printed circuit board 8 and the respective cell connector 6a-e.
Im Beispiel ist die Leiterplatte 8 ausschließlich über die Verbindungselemente 12a-e und ausschließlich an den Zellverbindern 6a-i im Zellkontaktiersystem 4 mechanisch gehalten. In the example, the printed circuit board 8 is held mechanically in the cell contacting system 4 exclusively via the connecting elements 12a-e and exclusively on the cell connectors 6a-i.
Im Ausführungsbeispiel ist die Leiterplatte 8 als Einfachleiterplatte (Single-Cell-Chip) ausgeführt, d.h. sie ist für genau zwei Zellverbinder (Figur 2: 6a, b / 6b, c / 6c, d / 6d,e) ausgelegt, kann also deren zwei ggf. unterschiedliche Potenziale oder sonstige Kenngrößen erfassen. Für ein Batteriesystem mit zum Beispiel n=fünf Zellverbindern sind damit lediglich n-1=vier Elektronikkomponenten 2 mit solchen Leiterplatten 8 notwendig. In the exemplary embodiment, circuit board 8 is designed as a single circuit board (single-cell chip), ie it is designed for exactly two cell connectors (FIG. 2: 6a, b/6b, c/6c, d/6d,e), and can therefore have two if necessary, record different potentials or other parameters. For example, for a battery system with n=five cell connectors thus only n−1=four electronic components 2 with such printed circuit boards 8 are necessary.
Im nicht dargestellten Endmontagezustand ist das ZKS 4 auf der Batterie montiert. Die Signalleitungen (hier realisiert durch die Verbindungselemente 12a, b) der einzelnen Potenzialniveaus (z.B. Potenziale der kontaktierten Zellverbinder 6a-e) des Batteriesystems werden dann auf der einzelnen Leiterplatte 8 als Verarbeitungssystem (hier ein PCB, alternativ auch flex / flex-rigid PCB) zusammengefasst. Dort werden die Potenzialniveaus in ein digitales Signal umgewandelt vermittels der Kommunikationsschnittstellen 22 über ein Datenübertragungssystem (BUS, Bussystem 44, hier die Drähte 28) weitergegeben, hier an die Gegenstelle 26. Die dafür notwendigen elektronischen Komponenten befinden sich auf der Leiterplatte 8. In the final assembly state, not shown, the ZKS 4 is mounted on the battery. The signal lines (here realized by the connecting elements 12a, b) of the individual potential levels (e.g. potentials of the contacted cell connectors 6a-e) of the battery system are then on the individual circuit board 8 as a processing system (here a PCB, alternatively also flex / flex-rigid PCB) summarized. There, the potential levels are converted into a digital signal by means of the communication interfaces 22 and passed on via a data transmission system (BUS, bus system 44, here the wires 28), here to the remote station 26. The electronic components required for this are located on the printed circuit board 8.
Eine Leiterplatte 8 ("Single-Cell-Chip") greift zwischen zwei aufeinander folgenden Potenzialen (Zellverbinder 6a, b / 6b, c / 6c, d / 6d,e) die Signale ab und liegt dafür direkt zwischen diesen bzw. den jeweils beiden Zellverbindern 6. Zwei aufeinander folgende Potenziale werden über lang ausgeführte selektivbeschichtete Verbindungselemente 12a, b (12b mit 3D-Nachgiebigkeit bzw. Zugentlastung) zum nächsten Potenzial geführt. Die selektive (da nicht vollflächig auf die Verbindungselemente 12 aufgebrachte) Beschichtung 14 befindet sich auf dem Verbindungselement 12a, b (selektiv nur) im jeweiligen Lötbereich 18a, b und ist in den Figuren ebenfalls nicht sichtbar bzw. nur durch Strichelung angedeutet. A printed circuit board 8 ("single-cell chip") picks up the signals between two successive potentials (cell connectors 6a, b/6b, c/6c, d/6d,e) and is located directly between these or the two in each case Cell connectors 6. Two successive potentials are routed to the next potential via long, selectively coated connecting elements 12a, b (12b with 3D flexibility or strain relief). The selective coating 14 (because it is not applied over the entire surface of the connecting elements 12) is located on the connecting element 12a, b (selectively only) in the respective soldering area 18a, b and is also not visible in the figures or is only indicated by dashed lines.
Die hohe Wiederholgenauigkeit der Verbindungselemente 12a,b ermöglicht somit eine Impedanzmessung. Die Verbindungselemente 12a, b können bzw. sind hier als Stanzteile ausgeführt, und können sich auf einem Stanzband befinden und eine automatisierte Bestückung wird so möglich (nicht dargestellt). Die selektive Beschichtung 14 vereinfacht die Schweißung der Verbindungselemente 12 an den Stellen 13 mit den Zellverbindern 6 aufgrund von Materialgleichheit (nicht beschichtetes Aluminium des Verbindungselement 12 und Aluminium des Zellverbinders 6) und erfüllt ebenfalls die Ansprüche von Korrosionsschutz. Die Längendehnung aufgrund von Wärme und der Vibrationsausgleich werden über die Stanzgeometrie der Verbindungselemente 12b erreicht. Die Anbindung an die Leiterplatte 8 wird über einen Lötprozess erstellt, wobei die PCB dadurch als starr, flex oder flex-starr ausgeführt werden kann. Die Lötung findet zwischen der Lötfläche 10 und dem Lötbereich 18 statt. The high level of repeatability of the connecting elements 12a,b thus enables an impedance measurement. The connecting elements 12a, b can or are designed here as stamped parts, and can be located on a stamped belt and automated assembly is thus possible (not shown). The selective coating 14 simplifies the welding of the connecting elements 12 at the points 13 with the cell connectors 6 due to the same material (uncoated aluminum of the connecting element 12 and aluminum of the cell connector 6) and also meets the requirements of corrosion protection. The lengthening due to heat and the vibration compensation are achieved via the stamping geometry of the connecting elements 12b. The connection to the circuit board 8 is created via a soldering process, where the PCB can be designed as rigid, flex or flex-rigid. The soldering takes place between the soldering surface 10 and the soldering area 18 .
Die Datenübertragung wird durch spezielle Cu-Pins (Gabelkontakte, Aufnahmemittel 24) bewirkt, welche der Anwendung eines Laserschweiß-Verfahrens zur Erzeugung einer serienfähigen Alu-Cu-Schweißverbindung dienen. Diese Pins erlauben die Übertragung von Digitalsignalen zwischen einzelnen Leiterplatten 8 oder zwischen einzelnen Batteriesystemen. The data transmission is effected by special Cu pins (fork contacts, receiving means 24), which are used for the application of a laser welding process to produce an aluminum-copper welded joint suitable for series production. These pins allow digital signals to be transmitted between individual printed circuit boards 8 or between individual battery systems.
Mehrere Leiterplatten 8 (Single-Cell-Chip) sind vorgesehen, welche jeweils zwischen zwei aufeinander folgenden Potenzialen liegen (siehe Figur 2). Several printed circuit boards 8 (single-cell chip) are provided, each lying between two successive potentials (see FIG. 2).
Die Datenübertragung erfolgt über BUS-Anbindungen seitens der Kommunikationsschnittstellen 22. The data is transmitted via BUS connections on the part of the communication interfaces 22.
Die Verschweißung zwischen den Verbindungselementen 12 und den Zellverbindern 6 erfolgt jeweils an der Stelle 13 der Verbindungselemente 12. The welding between the connecting elements 12 and the cell connectors 6 takes place at the point 13 of the connecting elements 12.
Die Elektronikkomponente 2 ist als "Single-Cell-Chip"-Variante (kontaktiert nur jeweils zwei Zellverbinder 6) ausgeführt und liegt über die Verbindungselemente 12a jeweils mechanisch fest und thermisch ausreichend gut gekoppelt an einem der Zellverbinder 6b, d an und greift über einen integrierten Temperaturfühler 34 bzw. Temperatursensor (NTC, Teil des dargestellten Chips, nur symbolisch angedeutet) die Temperatur des Zellverbinders 6b, d ab. Zwei aufeinander folgende Potenziale (zweiter Zellverbinder 6a, c zu 6b, 6c, e zu 6d) werden über Verbindungselemente 12b (lang bzw. flexibel ausgeführt mit 3D-Nachgiebigkeit bzw. Zugentlastung) zum nächsten Potenzial (Zellverbinder 6b, d) geführt. So ist auch eine Impedanzmessung möglich. The electronic component 2 is designed as a "single cell chip" variant (contacts only two cell connectors 6) and is mechanically fixed via the connecting elements 12a and thermally sufficiently well coupled to one of the cell connectors 6b, d and engages via an integrated Temperature sensor 34 or temperature sensor (NTC, part of the chip shown, indicated only symbolically) the temperature of the cell connector 6b, d. Two successive potentials (second cell connector 6a, c to 6b, 6c, e to 6d) are routed to the next potential (cell connector 6b, d) via connecting elements 12b (long or flexible with 3D flexibility or strain relief). Impedance measurement is also possible in this way.
Der Temperaturfühler 34 ist unmittelbar an der Lötfläche 10a angebracht, so dass er im Montagezustand auch möglichst nah am Verbindungselement 12a liegt. So ist er thermisch bestmöglich an die Temperaturübertragung vom Zellverbinder 6 über das Verbindungselement 12a zur Lötfläche 10a angebunden. Für ein entsprechend mit einer nicht dargestellten Batterie komplettiertes Zellkontaktiersystem 4 ergibt sich gemäß Figur 2 eine Single-Cell-Steuerung: Eine elektrische Verbindung (Logik Anbindung/Steuerungsanbindung) erfolgt durch ein Bussystem 44 (Anschluss an der Kommunikationsschnittstelle 22) zum jeweils nächsten Single-Cel I- Chip (Leiterplatte 8) über hier Cu-Lackdraht (Schweissgabeln, Aufnahmemittel 24, etc.), im Beispiel einen zweiadrigen Bus bzw. Bussystem 44 aus zwei Drähten 28. The temperature sensor 34 is attached directly to the soldering surface 10a, so that it is also as close as possible to the connecting element 12a in the assembled state. It is thermally connected to the temperature transfer from the cell connector 6 via the connecting element 12a to the soldering surface 10a in the best possible way. For a cell contacting system 4 correspondingly completed with a battery, not shown, there is a single-cell control according to FIG I chip (printed circuit board 8) via enameled copper wire here (welding forks, receiving means 24, etc.), in the example a two-wire bus or bus system 44 made of two wires 28.
Das Zellkontaktiersystem 4 wird wie folgt hergestellt: Zuerst werden die elektrischen Verbindungselemente 12a, b mit der Leiterplatte 8 durch Löten (Lötflächen 10 und Lötbereiche 18) verbunden. Anschließend werden die elektrischen Verbindungselemente 12a, b mit den Zellverbindern 6 verbunden, hier geschweißt. The cell contacting system 4 is produced as follows: First, the electrical connecting elements 12a, b are connected to the printed circuit board 8 by soldering (soldering areas 10 and soldering areas 18). Subsequently, the electrical connection elements 12a, b are connected to the cell connectors 6, welded here.
Ein Batteriemodul, das eine Batterie und ein die Batterie kontaktierendes Zellkontaktiersystem 4 enthält, wird wie folgt hergestellt: Die Elektronikkomponente 2 und getrennt hiervon das restliche Zellkontaktiersystem 4 werden bereitgestellt. Zuerst wird das Zellkontaktiersystem 4 ohne die Elektronikkomponente 2 mit der Batterie verbunden, d.h. die Zellverbinder 6 auf die Batteriepole aufgeschweißt. Anschließend wird die Leiterplatte 8 mit den Zellverbindern 6 vermittels der Verbindungselemente 12 elektrisch verbunden, insbesondere gemäß dem oben erläuterten Verfahren, d.h., das Zellkontaktiersystem wird hergestellt bzw. komplettiert. A battery module, which contains a battery and a cell contacting system 4 contacting the battery, is produced as follows: The electronic component 2 and, separately from this, the rest of the cell contacting system 4 are provided. First, the cell contacting system 4 is connected to the battery without the electronic component 2, ie the cell connector 6 is welded onto the battery poles. The printed circuit board 8 is then electrically connected to the cell connectors 6 by means of the connecting elements 12, in particular according to the method explained above, ie the cell contacting system is produced or completed.
Bezugszeichenliste reference list
Elektronikkomponente electronic component
Zellkontaktiersystem a-e Zellverbinder Cell contacting system a-e cell connector
Leiterplatte 0a, b Lötfläche 2a, b Verbindungselement 3 Stelle 4 Beschichtung 8a, b Lötbereich 2 Kommunikationsschnittstelle 4 Aufnahmemittel 6 Gegenstelle 8 Draht 0 Kommunikationskanal 4 Temperaturfühler 6 Mittelschenkel 8a, b Teilschenkel 0a, b Zufuhrschenkel 2 Frei schnitt 4 Bussystem Printed circuit board 0a, b soldering surface 2a, b connecting element 3 point 4 coating 8a, b soldering area 2 communication interface 4 receiving means 6 remote point 8 wire 0 communication channel 4 temperature sensor 6 middle leg 8a, b partial leg 0a, b supply leg 2 free cut 4 bus system

Claims

Patentansprüche patent claims
1. Elektronikkomponente (2) für ein Zellkontaktiersystem (4), wobei das Zellkontaktiersystem (4) eine Mehrzahl von Zellverbindern (6a-e) aufweist, die zur Leistungskontaktierung von Batteriezellen einer Batterie dienen, 1. Electronic component (2) for a cell contacting system (4), wherein the cell contacting system (4) has a plurality of cell connectors (6a-e) which are used for power contacting of battery cells of a battery,
- mit einer Leiterplatte (8) einer Mess- und/oder Managementanordnung für die Batterie, wobei die Leiterplatte (8) mit genau zwei der Zellverbinder (6a-e) elektrisch verbindbar ist und hierzu für jeden der Zellverbinder (6a-e) mindestens eine Lötfläche (10a, b) aufweist, - With a printed circuit board (8) of a measurement and/or management arrangement for the battery, the printed circuit board (8) being electrically connectable to precisely two of the cell connectors (6a-e) and for this purpose at least one for each of the cell connectors (6a-e). has a soldering surface (10a, b),
- mit mindestens einem, auf mindestens eine der Lötflächen (10a, b) auflötbaren elektrischen Verbindungselement (12a, b) für jeden der Zellverbinder (6a-e), zur jeweiligen elektrischen Verbindung der Lötfläche (10a, b) mit dem Zellverbinder (6a-e), - With at least one electrical connection element (12a, b) that can be soldered onto at least one of the soldering surfaces (10a, b) for each of the cell connectors (6a-e), for the respective electrical connection of the soldering surface (10a, b) to the cell connector (6a- e)
- wobei mindestens eines der Verbindungselemente (12a, b) flächenhaft streifenartig ausgebildet ist, - wherein at least one of the connecting elements (12a, b) is designed in the form of a strip over a large area,
- wobei mindestens ein erstes der Verbindungselemente (12a, b) zu einem ersten der Zellverbinder (6a-e) für eine mechanische Befestigung und/oder thermische Übertragung zwischen Zellverbinder (6a-e) und Leiterplatte (8) vergleichsweise mechanisch starr und vergleichsweise kurz ausgeführt ist, und - wherein at least a first of the connecting elements (12a, b) to a first of the cell connectors (6a-e) for a mechanical fastening and/or thermal transmission between the cell connector (6a-e) and the circuit board (8) is comparatively mechanically rigid and comparatively short is and
- mindestes ein zweites der Verbindungselemente (12a, b) zu dem zweiten der Zellverbinder (6a-e) für einen thermischen und/oder mechanischen Längenausgleich zwischen den Zellverbindern (6a-e) und/oder zwischen dem zweiten Zellverbinder (6a-e) und der Leiterplatte (8) vergleichsweise mechanisch flexibel und lang ausgeführt ist,- at least a second of the connecting elements (12a, b) to the second of the cell connectors (6a-e) for thermal and/or mechanical length compensation between the cell connectors (6a-e) and/or between the second cell connector (6a-e) and the printed circuit board (8) is comparatively mechanically flexible and long,
- wobei die Leiterplatte (8) mindestens eine Kommunikationsschnittstelle (22) zum Datenaustausch von Informationen mit einer Gegenstelle (26) aufweist. - Wherein the circuit board (8) has at least one communication interface (22) for data exchange of information with a remote station (26).
2. Elektronikkomponente (2) nach Anspruch 1 , dadurch gekennzeichnet, dass mindestens eines der Verbindungselemente (12a, b) eine selektive Beschichtung (14) in einem mit der Lötfläche (10a, b) zu verlötenden Lötbereich (18a, b) aufweist. 2. Electronic component (2) according to claim 1, characterized in that at least one of the connecting elements (12a, b) has a selective coating (14) in a soldering area (18a, b) to be soldered to the soldering surface (10a, b).
3. Elektronikkomponente (2) nach Anspruch 2, dadurch gekennzeichnet, dass zumindest ein Übergangsbereich zwischen dem Grundmaterial des Verbindungselements (12a,b) und der Beschichtung (14) gegen Korrosion abgedichtet ist. 3. Electronic component (2) according to claim 2, characterized in that at least one transition area between the base material of the connecting element (12a, b) and the coating (14) is sealed against corrosion.
4. Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eines der Verbindungselemente (12a, b) aus Aluminium besteht und/oder - falls dieses eine Beschichtung (14) aufweist - die Beschichtung (14) eine Zinnbeschichtung ist. 4. Electronic component (2) according to one of the preceding claims, characterized in that at least one of the connecting elements (12a, b) consists of aluminum and/or - if this has a coating (14) - the coating (14) is a tin coating.
5. Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eines der Verbindungselemente (12a, b) ein Stanzteil aus einer Blechplatte ist. 5. Electronic component (2) according to any one of the preceding claims, characterized in that at least one of the connecting elements (12a, b) is a stamped part from a sheet metal plate.
6. Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Leiterplatte (8) einen Temperaturfühler (34) enthält, der fest auf der Leiterplatte (8) und thermisch an die Lötfläche (10a, b) für das erste Verbindungselement (12a, b) gekoppelt angebracht ist. 6. Electronic component (2) according to any one of the preceding claims, characterized in that the printed circuit board (8) contains a temperature sensor (34) which is fixed to the printed circuit board (8) and thermally to the soldering surface (10a, b) for the first connecting element (12a, b) is attached coupled.
7. Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eines der ersten Verbindungselemente (12a,b) eine Rechteckform aufweist. 7. Electronic component (2) according to one of the preceding claims, characterized in that at least one of the first connecting elements (12a, b) has a rectangular shape.
8. Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eines der zweiten Verbindungselemente (12a, b) S-förmig ausgeführt, mit einem geradem Mittelschenkel (36), daran anschließend beidseitig je einen hierzu parallelen Teilschenkel (38a, b), und beidseitig hierzu jeweils einen vom Teilschenkel (38a, b) rechtwinkligen abzweigenden Zufuhrschenkel (40a, b). 8. Electronic component (2) according to one of the preceding claims, characterized in that at least one of the second connecting elements (12a, b) is S-shaped, with a straight middle leg (36), adjoining it on both sides a partial leg (38a, b), and on each side thereto a supply leg (40a, b) branching off at right angles from the partial leg (38a, b).
9. Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kommunikationsschnittstelle (22) mindestens ein Aufnahmemittel (24) für einen Draht (28) als zumindest Teil eines Kommunikationskanals (30) aufweist. 9. electronic component (2) according to any one of the preceding claims, characterized in that the communication interface (22) has at least one receiving means (24) for a wire (28) as at least part of a communication channel (30).
10. Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eines der Verbindungselemente (12a, b) ein einstückiger Direktverbinder zwischen Leiterplatte (8) und Zellverbinder (6a-e) ist. 10. Electronic component (2) according to any one of the preceding claims, characterized in that at least one of the connecting elements (12a, b) is a one-piece direct connector between the circuit board (8) and the cell connector (6a-e).
11. Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Leiterplatte (8) in einem Montagezustand im Zellkontaktiersystem (4) ausschließlich vermittels der Verbindungselemente (12a, b) mechanisch an den Zellverbindern (6a-e) und dadurch im Zellkontaktiersystem (4) befestigt ist. 11. Electronic component (2) according to one of the preceding claims, characterized in that the printed circuit board (8) in an assembled state in the cell contacting system (4) is mechanically attached to the cell connectors (6a-e) exclusively by means of the connecting elements (12a, b) and thereby in Cell contacting system (4) is attached.
12. Zellkontaktiersystem (4) mit einer Mehrzahl von Zellverbindern (6a-e), die zur Leistungskontaktierung von Batteriezellen dienen, und mit mindestens einer Elektronikkomponente (2) nach einem der vorhergehenden Ansprüche. 12. cell contacting system (4) with a plurality of cell connectors (6a-e), which are used for power contacting of battery cells, and with at least one electronic component (2) according to any one of the preceding claims.
13. Verfahren zum Herstellen eines Zellkontaktiersystems (4) nach Anspruch 12, bei dem: 13. A method for producing a cell contacting system (4) according to claim 12, in which:
- die Elektronikkomponente (2) nach einem der Ansprüche 1 bis 11 bereitgestellt wird, und - The electronic component (2) is provided according to any one of claims 1 to 11, and
- zuerst die elektrischen Verbindungselemente (12a, b) mit der Leiterplatte (8) durch Löten verbunden werden, - first the electrical connecting elements (12a, b) are connected to the circuit board (8) by soldering,
- anschließend die elektrischen Verbindungselemente (12a, b) mit den Zellverbindern (6a-e) verbunden werden. - Then the electrical connection elements (12a, b) are connected to the cell connectors (6a-e).
14. Verfahren zum Herstellen eines Batteriemoduls, das eine Batterie und ein die Batterie kontaktierendes Zellkontaktiersystem (4) nach Anspruch 12 enthält, bei dem:14. A method for producing a battery module that contains a battery and a cell contacting system (4) that contacts the battery according to claim 12, in which:
- die Elektronikkomponente (2) nach einem der Ansprüche 1 bis 11 und getrennt hiervon das restliche Zellkontaktiersystem (4) nach Anspruch 12 bereitgestellt wird, und- the electronic component (2) according to one of claims 1 to 11 and separately therefrom the rest of the cell contacting system (4) according to claim 12 is provided, and
- zuerst das Zellkontaktiersystem (4) ohne die Elektronikkomponente (2) mit der Batterie verbunden wird, und - 22 - - first the cell contacting system (4) is connected to the battery without the electronic component (2), and - 22 -
- anschließend die Leiterplatte (8) mit den Zellverbindern (6a-e) vermittels der Verbindungselemente (12a,b) elektrisch verbunden wird, insbesondere gemäß einem Verfahren nach Anspruch 13. - then the circuit board (8) is electrically connected to the cell connectors (6a-e) by means of the connecting elements (12a, b), in particular according to a method according to claim 13.
EP21761978.2A 2020-08-27 2021-07-29 Electronics component for a cell-contacting system Pending EP4205227A1 (en)

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DE102020005239.8A DE102020005239B4 (en) 2020-08-27 2020-08-27 Electronic component for a cell contacting system
PCT/EP2021/071234 WO2022042988A1 (en) 2020-08-27 2021-07-29 Electronics component for a cell-contacting system

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EP (1) EP4205227A1 (en)
CN (1) CN115943525A (en)
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DE102011004353B4 (en) * 2011-02-18 2015-08-27 Continental Automotive Gmbh Printed circuit board with a monitoring electronics for monitoring battery cells, and thus equipped electrical energy storage
DE102012005120A1 (en) 2012-03-14 2013-09-19 Diehl Metal Applications Gmbh Connection system for an energy storage device and energy storage device with the connection system
US9831482B2 (en) * 2013-09-06 2017-11-28 Johnson Controls Technology Company Battery module lid system and method
WO2017147821A1 (en) * 2016-03-02 2017-09-08 宁德时代新能源科技股份有限公司 Battery module
KR102184368B1 (en) 2017-12-11 2020-11-30 삼성에스디아이 주식회사 Battery pack
CN109004167B (en) 2018-06-15 2023-12-01 宁德时代新能源科技股份有限公司 battery module

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WO2022042988A1 (en) 2022-03-03
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DE102020005239A1 (en) 2022-03-03
CN115943525A (en) 2023-04-07

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