EP4139988A1 - Moyens de mise en contact de pôles à fort courant par branchement pour éléments de batteries - Google Patents

Moyens de mise en contact de pôles à fort courant par branchement pour éléments de batteries

Info

Publication number
EP4139988A1
EP4139988A1 EP21722125.8A EP21722125A EP4139988A1 EP 4139988 A1 EP4139988 A1 EP 4139988A1 EP 21722125 A EP21722125 A EP 21722125A EP 4139988 A1 EP4139988 A1 EP 4139988A1
Authority
EP
European Patent Office
Prior art keywords
battery
section
clamping
cell connector
opening
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
EP21722125.8A
Other languages
German (de)
English (en)
Inventor
Dietmar STEINDL
Urs Hunziker
Karl Rametsteiner
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.)
Pollmann International GmbH
Original Assignee
Pollmann International 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 Pollmann International GmbH filed Critical Pollmann International GmbH
Publication of EP4139988A1 publication Critical patent/EP4139988A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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
    • H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a system for connecting battery terminals of individual prismatic battery cells of a battery module, which provides more than 30A, wherein fastening sections of the individual cell connectors can be fastened to battery terminals with a clamp connection.
  • the invention also relates to the battery module and a method for connecting battery poles of individual prismatic battery cells of a battery module.
  • a large number of individual prismatic battery cells are combined to form a battery pack or battery module.
  • the respective battery poles of the battery cells are connected with conductive cell connectors.
  • connection systems must be flexible enough to accommodate these changes in distance.
  • this flexibility is problematic precisely in production.
  • Screw-based contacts for a prismatic accumulator have some disadvantages with regard to the construction height in the Z-direction, material fits and the resulting micro-corrosion.
  • Friction welding (ultrasonic bonding) is technically possible, but contains extremely strong vibrations that are transmitted from the battery terminal into the battery cell. Depending on the type of battery, this can have negative effects on the service life or performance of the battery.
  • a system for connecting battery posts of individual prismatic battery cells of a battery module providing more than 30A has an electrically conductive cell connector with a first fastening section and a second fastening section.
  • the first fastening section has a first through opening for receiving a first battery terminal and the second fastening section has a second through opening for receiving a second battery terminal.
  • the first fastening section and the second fastening section are arranged within an arrangement plane.
  • At least the first fastening section has a clamping section at the through opening with at least one elastically deformable clamping element (e.g. an elastic clamping bracket), which is bent out of the plane of arrangement and protrudes into the first through opening in such a way that when the first battery terminal is introduced, the clamping element for generating a clamping force can be preloaded and a clamping connection can be provided between the first fastening section and at least one side wall of the first battery terminal.
  • at least one elastically deformable clamping element e.g. an elastic clamping bracket
  • a battery module which provides more than 30A.
  • the battery module has the system described above, a first battery terminal and a second battery terminal.
  • the first battery post is clamped in the first through-opening and the second battery post is clamped in the second through-opening.
  • a method is described for connecting battery poles of individual prismatic battery cells of a battery module which provides more than 30A.
  • an electrically conductive cell connector with a first fastening section and a second fastening section is provided, wherein the first fastening section has a first through opening for receiving a first battery terminal and wherein the second fastening section has a second through opening for receiving a second battery terminal.
  • the first fastening section and the second fastening section are arranged within an arrangement plane.
  • At least the first fastening section has a clamping section with at least one elastically deformable clamping element at the through opening, which is bent out of the arrangement plane and protrudes into the first through opening in such a way that when the first battery terminal is introduced, the clamping element can be prestressed to generate a clamping force and a clamping connection between the first fastening section and at least one side wall of the first battery terminal can be provided.
  • the first battery terminal is inserted into the first through opening to produce the clamp connection.
  • the battery module defines an assembly which combines several prismatic battery cells and provides a mechanical connection for them, and at least enables an electrical series connection or parallel connection of the battery cells by means of the cell connector.
  • the individual battery cells can, for example, be arranged next to one another along one spatial direction or next to one another and / or one above the other (i.e. along two spatial directions) in a battery module.
  • a prismatic battery cell defines an electrical energy storage device with a fixed housing in, for example, a prismatic or cuboid design.
  • the battery cells are, for example, lithium-ion accumulators. Every The battery cell has in particular two battery poles, one + pole and one - pole. These two poles can be attached to the same side surface of the battery cell.
  • the cell connectors according to the invention are designed or dimensioned in particular so that they can be used to connect battery cells with a nominal voltage of less than 5.5 V.
  • the adjacent second battery cell accordingly also has two battery poles, one + pole and one - pole.
  • a cell connector is used in particular to connect the + pole (or - pole) of a battery cell to the corresponding - pole (or + pole) of the adjacent battery cell.
  • the prismatic battery cells are individual. This means that each battery cell forms a self-contained unit and therefore does not have any common components and has no fluidic coupling (for example via the battery fluid) with another battery cell.
  • a cell connector thus represents a high-current-resistant connection between the battery poles of two adjacent prismatic battery cells.
  • the cell connectors must withstand a strong voltage drop when loaded.
  • the cell connectors are made of a robust and electrically conductive material, such as a metallic material such as aluminum or copper.
  • the cell connectors also consist of a flat or plate-like material, for example sheet metal. Accordingly, the cell connectors are self-supporting compared to wire-like material.
  • the cell connectors have, for example, corresponding through openings as fastening sections for a respective battery pole.
  • a battery pole can accordingly be fixed in a through opening, for example by means of clamping forces.
  • At least the first fastening section and / or the second fastening section has, at its through opening, a corresponding clamping section which has an elastically deformable clamping element.
  • the clamping element is bent out of the plane of arrangement.
  • the clamping element can be configured on the basis of its dimensions and the choice of material in such a way that the restoring force or clamping force is so great that a displacement of the battery pole in the insertion direction, i.e. H. perpendicular to the arrangement plane. It is therefore not necessary to use additional fastening measures, such as welding or gluing, for example, in order to achieve a fixation of the battery pole in the through-opening.
  • the clamping element can, for example, be fastened to the through opening or be formed integrally with the cell connector.
  • the cell connector can be punched out of sheet metal, for example.
  • the clamping element can be formed integrally in the fastening section in that the clamping element is cut out of the cell connector on at least three edges and is fastened integrally with the cell connector on a bending edge.
  • the clamping element can then be bent out of the plane of arrangement by bending around the bending edge.
  • the clamping element can for example be bent out of the arrangement plane in the direction of a battery cell. Alternatively, the clamping element can be bent out onto an opposite side with respect to the battery cell.
  • a rigid counterpart ie a non-elastically deformable stop, for example, can be formed on a side wall of the battery pole, which is opposite the side wall on which the clamping element rests, so that the clamping element in the fastening pole presses against this stop and thus creates a clamp connection.
  • an opposing further elastically deformable clamping element can be arranged so that the battery pole is clamped between two elastically deformable clamping elements.
  • the free end faces or surface of the battery pole remains free, so that, for example, good thermal dissipation, for example to the environment or to a coupled to the cooling system, is made possible.
  • the curved lateral contacting zones or contact elements are designed in such a way that the heating of the contact resistance at the maximum current strength is kept sufficiently small and this does not lead to any disruptive corrosive phenomena in the transition between the contacts.
  • the top of the cell connector can be provided with an additional coating after contacting, which prevents further corrosion progress in the event of microcracks at the bending points and also compensates for surface unevenness for the thermal coupling.
  • the described clamp connection according to the invention thus allows the production of cell connectors which have only a small voltage drop in the high load range.
  • voltage drops across the cell connectors when the IC is loaded is less than 0.5 V, in particular less than 0.2 V, and in special cases less than 0.1 V.
  • a 10-minute current load capacity of the cell connectors is over 30A, in particular over 50 A, further in particular over 90A, even further in particular over 170 A.
  • the clamp connection according to the invention allows, due to its design, a simple release of cell connectors in the case of service or recycling. Either through the use of relief mechanisms, through mechanical forces or by cutting open the cell connector, the cell connector can be removed again without damaging the battery.
  • the spring forces or the clamping force of the clamping elements in the clamping connection between the cell connector and the battery pole are designed to be greater or significantly greater than the tensile forces on the pole connection resulting from the expansion compensation. This prevents the high-current connections from being loosened and any cold welds being torn open by the expansion behavior of the cell connectors or the battery cells.
  • the clamping element can be configured in such a way that the clamping force is twice as large or more than five times greater than the tensile forces of the expansion compensation of the battery cells.
  • the contact zone between the cell connector and the battery terminal is structured. This increases the point pressure during assembly and, when the cell connector is pushed on, tears up any oxide layers over the battery pole, which promotes the formation of a cold weld.
  • the same effect can also be achieved by a cell connector which has several sheet metal layers, the contacting then being designed in such a way that the sheet metal ends hit the surface of the battery terminal with sharp edges and thus achieve the mentioned contact improvement.
  • At least the first through opening and / or the second through opening has a predominantly round, elliptical or rectangular opening cross-section.
  • the opening cross section of the through opening can be adapted to the shape of the battery terminal.
  • the clamping section is designed to exclusively contact side walls of the first battery terminal.
  • the free surface or end face of a battery pole can be used for further coupling of external systems, for example with a cooling system, or generally for thermal heat dissipation.
  • the clamping element protrudes at least in regions into the through opening and can be preloaded by introducing the first battery terminal.
  • the through opening has a corresponding opening cross section with a central axis which runs perpendicular to the arrangement plane (or parallel to a normal to the arrangement plane).
  • the clamping element is bent out of the arrangement plane in such a way that the clamping element runs in a direction of extent out of the arrangement plane in the direction of the central axis.
  • the clamping element which is spaced from the fastening section of the cell connector and correspondingly spaced from the plane of arrangement, protrudes into the through opening.
  • the clamping element has a bending section and a contact section, the bending section being integrally connected to the first fastening section and has a bend out of the plane of arrangement, wherein the bending section is integrally connected to the contact section.
  • the contact section has a clamping surface which can be coupled in a force-transmitting manner to the side wall of the first battery terminal. The larger the clamping surface, the better the current can be transmitted between the clamping element and the battery terminal. For example, the contact section or its clamping surface can nestle against the battery terminal in order to generate surface contact with the battery terminal.
  • the contact section is designed in such a way that the clamping surface of the contact section in the unstressed state extends from an edge of the through opening, in particular pyramidal or conical, in the direction of the center of the through opening. This supports, accelerates and / or simplifies the positioning (in the sense of self-alignment) in the context of automated assembly.
  • the clamping element has an end section with a free end, the contact section being arranged between the bending section and the end section.
  • the end section extends opposite the clamping surface of the contact section in such a way that the end section is free of contact with the side wall of the first battery terminal when the clamping surface is coupled in a force-transmitting manner to the side wall of the first battery terminal. Since the free end is bent away from the side wall, assembly aids, for example, can more easily grip the clamping element at the free end and move it away in order to provide an assembly aid accordingly.
  • the cell connector has an assembly opening.
  • the end section accordingly has a receiving opening.
  • the mounting opening and the coupling point are such arranged so that a relief spike can be inserted through the assembly opening and can be coupled to the coupling point in such a way that the end section and the contact section for decoupling with the first battery pole can be bent away against the clamping direction.
  • the battery poles of a battery cell may only be exposed to limited mechanical loads so that the battery cell is not damaged.
  • a corresponding assembly aid temporarily reduces the clamping force of the cell connectors so that they can be pushed over the battery poles.
  • the clamping section has at least one further elastically deformable clamping element, which is arranged on the through opening opposite the clamping element and is bent out of the plane of the arrangement so that the first battery pole can be inserted between the clamping element and the further clamping element, around the Provide clamping connection.
  • the further clamping element can be designed in accordance with the clamping element described above.
  • the clamping forces of the clamping elements are configured in such a way that the clamping force on at least two opposite side walls of a battery terminal is approximately the same. This creates a force-neutral and therefore largely distortion-free connection between the cell connector and the battery terminal.
  • the clamping section can furthermore have further elastically deformable clamping elements which are arranged opposite one another at the through opening and are bent out of the plane of arrangement so that the first battery terminal can be pushed between the clamping elements and a force-symmetrical clamping force can be provided around the first battery terminal is.
  • the clamping section can thus generate a clamping force around the battery pole with a multiplicity of circumferential clamping elements, which clamping force acts symmetrically, in particular force symmetrically, around the battery pole.
  • the system has a clamping ring which is arranged around the clamping elements in order to prevent the clamping connection from being released.
  • the clamping ring is in particular releasably braced around the clamping elements and presses them evenly into the center of the through opening and thus against the side walls of an inserted battery terminal.
  • the clamping ring is designed in particular to be elastically deformable in order to better adjust a clamping force effect.
  • the clamping ring can for example consist of an electrically insulating plastic material.
  • the clamping ring can also consist of the same or a different material with respect to the cell connector and, for example, have an iron alloy.
  • the cell connectors can be made of aluminum, for example.
  • the crystal structure of aluminum tends to flow. For this reason, the clamping ring is attached around the clamping contact. This can only act on the corners of the clamps or on their entire length.
  • the choice of a spring material with long-term stability, such as corrosion-proof or corrosion-protected iron material or similar, is particularly advantageous. This also prevents the long-term tearing of the corrosion layer typical of aluminum and the associated oxidation problems.
  • the first fastening section and the second fastening section are connected to one another by means of a conductive connection.
  • the conductive connection can be formed integrally and monolithically with the first and second attachment portions.
  • the cell connector can be produced together with the fastening sections and the conductive connection in a stamping process.
  • the conductive connection has a conductor, in particular a strip-shaped conductor.
  • the strip-shaped conductor runs in particular within the arrangement plane in which the first fastening section and the second fastening section are also arranged.
  • the course described above is designed in such a way that the rigidity in the x-direction is smaller than in the y-direction and / or z-direction. In this way, expansions or contractions in the x direction can be compensated for without tension and corresponding defects occurring in the conductive connection or in the cell connection.
  • the conductor has a loop-shaped, curved or wave-shaped, in particular meander-shaped, course to compensate for a change in distance between the first fastening section and the second fastening section.
  • the course described above is designed in such a way that the rigidity in the x-direction is smaller than in the y-direction and / or z-direction. In this way, expansion or contraction in the x-direction can be compensated for without tension and corresponding defects occurring.
  • the clamping connection is designed such that the elastically deformable clamping element is designed to be more rigid than the conductive connection between the first fastening section and the second fastening section. It can thus be ensured that in the event of a relative movement between the fastening sections, which are not prevented by the conductor due to its deformability, the clamping connection, ie in particular the clamping elements which are more rigid with respect to the conductor, does not come loose.
  • the cell connector is a first cell connector.
  • the system also has a second electrically conductive cell connector, which is designed to fasten and electrically connect two further spaced apart battery poles.
  • the system furthermore has an electrically insulating carrier element, to which the first cell connector and the second cell connector are attached, in order to provide a supporting structure for the first cell connector and the second cell connector by means of the carrier element.
  • the first cell connector and the second cell connector are exclusively embedded in certain areas in the carrier element, so that surface areas of the first cell connector and the second cell connector are free from a cover with the carrier element.
  • the carrier material of the carrier element consists of an electrically insulating material, such as, for example, a (in particular injection-mouldable) plastic material.
  • the first cell connector and the second cell connector are attached to the carrier material.
  • the carrier material is firmly connected to the first cell connector and the second cell connector in such a way that a self-supporting unit is created together.
  • This corresponding self-supporting unit can, in particular, facilitate assembly, since simple handling is possible, in particular when connecting the corresponding battery poles.
  • the first cell connector and the second cell connector are partially embedded in the carrier element.
  • the term “embedding” is understood below to mean that a cell connector is at least partially surrounded by the material of the carrier element and, so to speak, is partially immersed in a body of the carrier element, so that the carrier material at least partially encloses the cell connector
  • the carrier material has, for example, a receiving slot in which a region of the cell connector is present, so that the carrier material encloses two opposing surfaces and the end face of the cell connector connecting the surfaces and is embedded accordingly.
  • a corresponding embedding is preferably implemented in an injection molding process, so that no machining, for example to form the receiving slot in the carrier element, is necessary.
  • the definition of "embedding exclusively in certain areas” means that the cell connectors are not completely embedded in the carrier element and are encased by the carrier element. free from a covering of the carrier material in order to provide electrical contactability. Furthermore, surface areas of the cell connectors remain free of the material of the carrier element, in particular to provide better heat dissipation.
  • the carrier element covers less than 50%, in particular less than 10% and further in particular less than 5% of a surface of a cell connector. Accordingly, the carrier element can cover an opposite surface area.
  • the carrier element can embed a cell connector in such a way that, for example, the carrier element surrounds the cell connector along one side length.
  • the carrier element can run circumferentially around the cell connector, a center of the cell connector, in particular in which the through-opening of the fastening area is provided, being free from embedding or covering with the carrier area.
  • a surface of a cell connector which is directed away from the battery cell can only be less than 50%, in particular less than 10% and more particularly less than 5% be covered by the carrier element, so that a sufficiently stable embedding is created and at the same time a sufficient free area of the surface to allow thermal heat dissipation and, for example, a coupling of a heat sink.
  • the surface facing the battery cell can be more than 10%, in particular more than 50%, in particular completely covered by the carrier element in order to thus provide good potential shielding.
  • the first cell connector, the second cell connector and the carrier element are arranged within the common arrangement plane.
  • the cell connectors and the carrier element are arranged next to one another within the common arrangement plane.
  • the first cell connector and the second cell connector form punched-out flat components.
  • the first cell connector and / or the second cell connector each consist, for example, of a sheet metal, in particular a multilayer sheet. In the case of a punched-out flat component or a sheet metal, the width and length of which are very much greater than their thickness.
  • the first and second cell connectors can for example consist of a sheet made of aluminum or copper.
  • different layers of different materials can form a cell connector. For example, different materials can be used in different layers.
  • the carrier element has a first carrier section which at least partially embeds the first cell connector, and a second carrier section which at least partially embeds the second cell connector.
  • the first carrier section and the second carrier section are connected by means of an electrically insulating connection structure.
  • the connection structure can consist of the same material as the first carrier section or the second carrier section.
  • the first carrier section, the second carrier section and the connection structure can be created in a common injection molding step.
  • the first support section, the second support section and the connecting structure form a self-supporting unit and can be manufactured robustly.
  • connection structure is designed to be deformable in order to compensate for a change in distance between the first cell connector and the second cell connector.
  • the connection structure can for example be made of an elastically deformable material in order to compensate for a corresponding change in distance between two cell connectors without breaking.
  • the carrier element connects two cell connectors which connect battery poles of a common battery cell to at least one fastening area. Due to thermal expansion or due to aging, battery cells expand or reduce their size. In order not to cause the two cell connectors to become wedged due to a carrier element that is too rigid, the connection structure between two carrier sections can advantageously be designed to be elastically deformable.
  • connection structure can be designed in such a way that elastic deformation is possible along a predetermined spatial direction.
  • the individual battery cells are arranged next to one another along a first spatial direction (for example the x-axis) and connected accordingly with the cell connectors.
  • a second spatial direction (for example y-axis) which is orthogonal to the first spatial direction describes an extension of the battery cell in the arrangement plane.
  • a third spatial direction (z-axis), which is, for example, parallel to the normal to the plane of arrangement and along which the battery poles extend from a cell connector, is in particular orthogonal to the first spatial direction and the second spatial direction.
  • connection structure can be designed in such a way that it is non-destructive or elastically deformable along the first spatial direction (X direction). Because the length changes not only taking place in the x-direction, a rigid movement restriction in the x-direction is not selected, but a system with different elasticity constants (dependent on the direction of the coordinate). This means that in the y- and z-direction the movement compensation with stiffer movement mechanisms than in the x-direction.
  • connection structure has a loop-shaped, curved or wave-shaped, in particular meander-shaped, course.
  • the connection structure can be produced, for example, together with the first cell connector and the second cell connector from a common base material, such as a plate-like material or sheet metal, by means of cutting or punching.
  • the course of the connection structure described above runs in particular within the Arrangement level in which the first cell connector and the second cell connector are also arranged.
  • the course described above is designed in such a way that the rigidity in the x-direction is smaller than in the y-direction and / or z-direction. In this way, expansions or contractions in the x direction can be compensated for without tension and corresponding defects occurring in the connection structure or in the cell connection.
  • At least the first carrier section and / or the second carrier section has at least one receiving groove for receiving a signal line.
  • the signal line can thus be coupled to the first cell connector or the second connector.
  • the signal line is attached to the corresponding cell connector and can also be arranged on the cell connector in an electrically conductive manner. Signals can thus be transmitted via the signal line, either from the cell connector itself or from a sensor additionally arranged there.
  • the signal lines can thus in particular represent sensor lines, which represent connecting lines in the interior of a battery module and are used to monitor measured values. The measured values included, for example, cell voltage and temperature. In the case of certain battery modules, these lines can be used to actively balance the charge / load. Charging and discharging of individual cells can also be made possible.
  • the signal lines in the component carrier can be electrically insulated in such a way that they are suitable for a test voltage of over 400V, in particular over 800 V, in particular over 1600 V.
  • the mean cross section of the sensor lines can be over 0.1 mm A 2 (square millimeters), in particular over 0.5 mm A 2, further in particular over 1.2 mm A 2.
  • the system can in particular include a strain relief for a sensor assembly to which the signal lines are connected.
  • each cell connector connects corresponding battery poles of two different battery cells.
  • the first cell connector can connect a - pole of a first battery cell to a + pole of an adjacent second battery cell.
  • the second cell connector can correspondingly connect a + pole of the first battery cell to a - pole of a third adjacent battery cell.
  • the two electrically conductive cell connectors are connected by the electrically insulating carrier element, so that a robust, rigid and, in particular, self-supporting unit of cell connector and carrier element is provided. In this way, in particular in the case of automated production of large battery modules with a large number of battery cells, easier handling of the cell connectors and, correspondingly, faster and more secure connection of the cell connectors to the battery poles can be provided.
  • the system according to the invention can have a multiplicity of cell connectors, two cell connectors each being mechanically coupled to a corresponding carrier element. Accordingly, a large number of battery poles can be connected simultaneously in one work step. In comparison to a conventional individual attachment of the respective cell connectors to two battery poles, the system according to the invention brings about a significantly faster and more robust connection of a large number of battery cells.
  • the carrier element has the additional function of stable and protected guidance of the signal line.
  • the signal line can be preinstalled in the receiving groove before the system is installed on the battery poles or can be installed subsequently after the system has been installed on the battery poles.
  • the first and / or second carrier section have a plurality of grooves for corresponding signal lines.
  • a particularly high contact pressure can be built up between the clamping elements and the battery terminal later, after assembly, which would lead to mechanical overload or damage to the battery terminal without force relief during assembly.
  • a particularly high clamping force can be generated at the battery pole that this leads to a particularly high level of impact resistance (without detaching the cell connector) of the entire battery module (e.g. in the event of minor accidents).
  • a particularly high level of impact resistance without detaching the cell connector
  • the risk of detachment and / or of cold welds tearing open at contact zones can be reduced due to the lower mass.
  • the system furthermore has a coupling element which is fastened, in particular releasably, between the first carrier section and the second carrier section.
  • the coupling element is arranged with the first carrier section and the second carrier section one after the other along an arrangement direction, in particular within an arrangement plane, so that the first carrier element, the coupling element and the second carrier element are arranged one after the other along the arrangement direction (x-direction).
  • the coupling element couples the first carrier section and the second carrier section, so that a more robust structure of the system is provided.
  • the coupling element consists of an electrically insulating material such as plastic, for example, and can also be produced, for example, by means of an injection molding process.
  • the coupling element has a further receiving groove for receiving the signal line.
  • the coupling element thus has the additional function of stable and protected routing of the signal line or another signal line.
  • the coupling element and the signal line can be preinstalled in the further receiving groove before the system is installed on the battery terminals.
  • the coupling element can be coupled to the carrier sections before the system is installed on the battery posts.
  • the carrier sections can first be attached to the battery terminals.
  • the coupling elements (for example together with the signal lines) can be attached to the carrier sections.
  • the first carrier section, the coupling element and then the second carrier section are present in the x direction and within the arrangement plane.
  • the system when installed, the system can form a load-bearing structure which, on the one hand, carries the signal lines and, on the other hand, the cell connectors.
  • the construction creates a mechanically predetermined movement path for the signal lines. Dodging / deviating from this path, which is specified by the receiving groove, due to the higher forces required for this, is unlikely. This increases the safety of the live signal lines (e.g. sensor and load balancing lines).
  • the cell connectors and the coupling element are joined to one another prior to assembly on the prismatic cells and the signal or sensor lines are connected to the cell connectors. This allows full testing of the system prior to mounting on the battery cells.
  • the carrier element and / or the coupling element can be designed in such a way that a large creepage distance can be formed between the signal lines even for higher voltages and a test voltage of over 400V, preferably over 800V and in special cases over 1600V is sufficient. This allows battery modules according to the invention to be operated using the relevant provisions for energy systems with operating voltages above the electrical protective extra-low voltage of below 50V.
  • contact protection is achieved by increasing the height of the insulators compared to conductors. This can be achieved in particular in that the receiving grooves in the carrier element or the coupling element are deeper than a height or a cross section of a signal line.
  • the cell connectors but also the sensor lines can be punched out of a flat material and then embedded. By creating meanders, loops or bends that lie in the arrangement plane (x-y plane), both expansion compensation and cost-effective production can be achieved.
  • the solution according to the invention only processes small or very small parts of an entire cell connector accordingly, that is, it performs deformations in the Z-plane.
  • the signal lines are implemented with a larger cross section than would be necessary for pure voltage monitoring of the individual cell voltage. This higher cross-section allows a higher current carrying capacity on these lines. As a result, the difference between individual cells can be at least partially compensated for by means of a BMS (battery management system) via these lines (reloading, additional charging, partial charging, etc. of individual cells).
  • BMS battery management system
  • the signal line has an integrated current fuse, in particular a fuse, the signal line being designed in particular with a fuse area with a defined cross-sectional reduction in such a way that the cross-sectional reduction provides the fuse.
  • the cross-section reduction can be produced, for example, by means of a notch (e.g. made during a stamping process), thinning by bending (in the sense of deep-drawing, which reduces the cross-section) or drawing.
  • a notch can be advantageous in terms of keeping to measure.
  • This reduction is placed in a place where overheating does not lead to ignition of the insulation material.
  • This cross-sectional reduction can serve as a fuse in the event of a short circuit in the sensor line. Because the sensor line is in a defined (and safe with respect to the surrounding components) position, overheating of the sensor line can be avoided along its entire length.
  • a securing element can also be used instead of a cross-section reduction. To ensure the thermal integrity of the component carrier and / or to visualize a triggering, this safety mechanism can be in the non-embedded part of the system.
  • the securing element can be designed to be non-reversible so that, in the event of a response, a service activity has to check whether the response of the securing element has led to greater damage.
  • the securing function or the cross-section reduction can in particular lie at least partially in a non-embedded part of the component carrier.
  • the system has a sensor, in particular a temperature sensor, a voltage sensor or a power sensor, which is arranged on the first cell connector or on the second cell connector or is integrated therein.
  • the sensor is coupled to one of the signal lines in order to receive or forward signals.
  • the system thus has an integrated status control of the system itself or of the connected battery cells.
  • the sensor can, for example, be firmly attached to a cell connector.
  • the connection system and the plug-in connection intercepts expansion of the battery cells, for example via sliding components or meandering connection mechanisms, it is possible, for example, to better thermally couple a temperature sensor to a single cell.
  • This allows a more precise, more reliable and long-term stable temperature measurement than with a normal pressure-based (frictional) coupling of the thermocouple to the battery cell.
  • the contacting of this sensor can in turn take place via the inventive concept of the sensor lines.
  • the same mechanism also applies to the coupling of other sensors to a single battery cell, for example with local intelligence (e.g. bus systems for sensor data transmission, active charge / load balancing).
  • the carrier element can also integrate additional electrical sensors (eg heat sensor) and / or electronic components (eg local intelligence or active charging / load balancing).
  • the carrier element and / or the coupling element can have externally applied or integrated cooling lines through which a cooling medium can flow.
  • the cooling lines are connected to an external cooling mechanism.
  • the cooling mechanism can, for example, have the heat sink described below, which is in thermal contact with the cell connectors and, furthermore, in particular in direct contact with the battery terminals.
  • At least one of the first battery terminals has a free terminal surface.
  • the first battery terminal protrudes from a base body of a battery cell, the first battery terminal being arranged in the first through opening in such a way that a first surface of the first cell connector directed towards the base body of the battery cell is closer to the base body than the terminal surface.
  • the first battery terminal is arranged in the first through-opening in such a way that the terminal surface is coplanar with a second surface of the first cell connector opposite the first surface, so that a common coupling surface can be provided.
  • the coupling surface extends and lies, for example, within the arrangement plane.
  • the battery module has a heat sink of a cooling system, which is arranged on the pole surface for thermal coupling.
  • the heat sink rests flat on the coupling surface for thermal coupling.
  • the cooling body can for example have cooling lines through which a cooling medium, for example a liquid fluid, flows.
  • the cooling lines of the cooling body can, for example, be coupled to cooling lines which are integrated in the carrier element and / or the coupling element.
  • the contact clips or the clamping elements which rest on the side walls of the battery poles, can be designed with a very small structural height (in the z direction).
  • the cell connector can be applied to the battery pole in such a way that the free surface of the cell connector facing away from the battery cell lies in the same plane as the pole surface of a battery pole, or the free surface of the cell connector is at least not higher than the battery pole itself or around the battery pole protrudes less than the sheet metal thickness of the cell connector itself.
  • the coolant flow can take place within the arrangement plane (x-y plane) along the pole surface and the cell connector with little or no flow disturbances in the direct vicinity of the battery pole.
  • the clamping element has an extension length parallel to a side wall of the battery pole, which is equal to the pole extension in the z-direction or is smaller than the pole extension of the battery pole in the z-direction by the thickness of the cell connector.
  • the first fastening section is welded to the first battery terminal and / or the second fastening section is welded to the second battery terminal.
  • the clamp connection according to the invention enables, for example, initially in a first assembly step a force-neutral positioning of the cell connectors on the battery cells. In a second step, for example, due to the exact positioning, a robust and precisely positioned welding can be carried out.
  • the clamping element before the first battery terminal is inserted, the clamping element is pretensioned against the clamping force by means of a mounting element.
  • the clamping element is bent in a direction opposite to the central axis of the through-opening and, for example, out of the through-opening by means of the mounting element, before and while the cell connector is plugged onto the battery terminal.
  • the clamping force is, so to speak, reduced by means of the assembly element.
  • the assembly element for reducing the clamping force can have a wedge system, a mandrel / punch system and / or relief pins.
  • the cell connector has an assembly opening through which, for example, a relief mandrel can be inserted and coupled to the end section of the clamping element.
  • the relief mandrel can then be pivoted or displaced in such a way that the end section and thus the entire clamping element is bent out from the center of the through opening in order to reduce the clamping force and enable simple assembly.
  • the mounting element has a stamp which is inserted from an upper side (which is directed away from the battery cell) of the cell connector into the first through opening (in particular in the direction of the battery cell) in order to preload the clamping element (and correspondingly out of the To bend out the center of the through opening).
  • the first battery pole is inserted from the underside (which is closest to the battery cell) of the cell connector into the first through opening until a predetermined position is reached in the first through opening.
  • the stamp is then pulled out of the through opening and the clamping element clamps the side wall of the first battery terminal.
  • the signal lines can be prefabricated in a self-supporting unit on the carrier element and the coupling elements (and also for attachment to the cell connector) and, if necessary, tested.
  • the conductive connection between the corresponding fastening sections of a cell connector and the connection structure between the carrier sections can create tension and pressure relief systems for assembly and for operational (for example due to aging) expansion. Expansion compensation can also be provided for the different elasticities between the clamping elements and, for example, the conductive connection between the fastening sections.
  • punched cell connectors with minimal edge bends in the area of the battery terminal have a number of advantages.
  • the minimal edge bends allow, on the one hand, the compensation of the mechanical scattering of the mass of the battery pole and, on the other hand, allow a suitable contact pressure to be built up.
  • the contact pressure should be high enough to achieve low contact resistance over the long term (eg through micro-welds) and, on the other hand, sufficiently low in terms of elasticity of the conductor material relationship side Clamping elements so that the system remains within the permanent elasticity of the components involved.
  • the area of flow limit of the linear expansion area and transition to plastic deformation
  • the cell connectors are plugged onto the battery pole, whereby the insertion forces may well require mechanical support or mechanical aids for force reduction (i.e. assembly elements) can be used for this purpose.
  • the battery poles are laterally contacted by means of the clamping elements, so that a force symmetry of the contacting forces arises, which avoids mechanical loading (in the sense of spring contact in the Z direction) on the battery pole or the area around the cell connector.
  • a corresponding mechanical inhibition can be added from the outer housing or the cooling system (not shown).
  • FIG. 1 shows a schematic illustration of a system for connecting battery poles of a battery module according to an exemplary embodiment.
  • FIG. 2 shows a schematic sectional illustration of a system for connecting battery poles of a battery module according to an exemplary embodiment.
  • FIG. 3 shows a schematic illustration of a system for connecting battery poles to a stiffening element according to an exemplary embodiment.
  • FIG. 4 shows a schematic representation of coupling elements with signal lines according to an exemplary embodiment.
  • FIG. 5 shows a schematic representation of a mechanical plug connection according to an exemplary embodiment.
  • FIG. 6 shows a schematic illustration of a system for connecting a plurality of battery cells of a battery module according to an exemplary embodiment.
  • 7 shows a schematic illustration of an attachment of a cell connector to a battery pole according to an exemplary embodiment.
  • FIG. 8 shows a schematic illustration of a cell connector with an insulation element according to an exemplary embodiment.
  • FIG. 9 shows a schematic illustration of a carrier tape for coupling elements according to an exemplary embodiment.
  • FIG. 10 shows a schematic illustration of a fastening of a cell connector to a battery pole according to an exemplary embodiment.
  • FIG. 11 shows a schematic representation of an assembly aid with a relief mandrel according to an exemplary embodiment.
  • FIG. 12 shows a schematic representation of an assembly aid with a stamp according to an exemplary embodiment.
  • FIG. 1 shows a schematic illustration of a system 100 for connecting battery poles 101, 102 of a battery module 100 according to an exemplary embodiment.
  • FIG. 2 illustrates in a step representation the embedding of the cell connector 110 of the system 100 from FIG. 1.
  • the system 100 has a first electrically conductive cell connector 110, which is designed to attach and electrically connect two spaced apart battery poles 101, 102, and a second electrically conductive cell connector 120, which is designed to attach and electrically connect two further spaced apart battery poles 101, 102 is on.
  • the system 100 has an electrically insulating carrier element 130, to which the first cell connector 110 and the second cell connector 120 are fastened in order to provide a supporting structure for the first cell connector 110 and the second cell connector 120 by means of the carrier element 130, wherein the The first cell connector 110 and the second cell connector 120 on the carrier element 130, the first cell connector 110 and the second cell connector 120 are exclusively embedded in certain areas in the carrier element 130, so that surface areas of the first cell connector 110 and the second cell connector 120 are free of a cover with the carrier element 130 are.
  • a signal line 105 is coupled to at least one of the first and second cell connectors 120.
  • the electrically conductive cell connector 110 is formed with a first fastening section 111 and a second fastening section 112, the first fastening section having a first through opening for receiving the first battery terminal 101 and the second fastening section having a second through opening for receiving the second battery terminal 102.
  • the first fastening section and the second fastening section are arranged within an arrangement plane 201 (see FIG.
  • the battery module 150 defines an assembly which combines a plurality of prismatic battery cells 151, and an electrical series connection or parallel connection of the battery cells 151 is achieved at least by means of the cell connectors 110, 120.
  • the individual battery cells 151 are arranged next to one another, for example, along a spatial direction (x-axis).
  • Each battery cell 151 has, in particular, two battery poles 101, 102, each with a + pole 102 and a - pole 101.
  • the adjacent second battery cell 151 accordingly likewise has two battery poles 101, 102.
  • the cell connectors 110, 120 are used to connect the + pole (or - pole) 101, 102 of a battery cell 151 to the corresponding - pole (or + pole) 101, 102 of the adjacent battery cell 151.
  • the carrier material of the carrier element 130 consists of an electrically insulating material, such as, for example, a (in particular injection-mouldable) plastic material.
  • the first cell connector 110 and the second cell connector 120 are fastened to the carrier material 130.
  • the carrier material is firmly connected to the first cell connector 110 and the second cell connector 120 in such a way that a self-supporting unit is created together.
  • the first cell connector 110 and the second cell connector 120 are partially embedded in an embedded region 104 in the carrier element 130.
  • the term “embedding” is understood below to mean that the cell connectors 110, 120 are at least partially surrounded by the material of the carrier element 130, so that the carrier material at least partially encloses the cell connector 110, 120.
  • the carrier material 130 has, for example, a Receiving slot, in which a region of the cell connector 110, 120 is present, so that the carrier material encloses two opposing surfaces 206, 207 and the end face of the cell connector 110, 120 connecting the surfaces and is embedded accordingly.
  • a corresponding embedding is preferably implemented in an injection molding process.
  • the contact areas on the cell connector 110, 120, in particular in the corresponding through openings, into which the battery terminals 101, 102 can be inserted, remain free from covering the carrier material of the carrier element 130 in order to provide electrical contactability.
  • Carrier sections 131, 132 of the carrier element 130 are formed, for example, with a U-shaped section in which the cell connectors 110, 120 are embedded. Thus, only a small surface area, for example between 10% and 30% of a total area of a cell connector 110, 120, is covered and embedded with the carrier element 130.
  • a signal line 105 is coupled to the first cell connector 110 or the second cell connector 120.
  • the signal line 105 is attached to the corresponding cell connector 110, 120 and can furthermore be arranged in an electrically conductive manner on the cell connector 110, 120.
  • the first cell connector 110, the second cell connector 120 and the carrier element 130 are arranged within the common arrangement plane 201.
  • the cell connectors 110, 120 and the carrier element 130 are arranged next to one another within the common arrangement plane 201.
  • the first cell connector 110 and the second cell connector 120 form punched-out flat components.
  • the first carrier section 131 and the second carrier section 132 are connected by means of an electrically insulating connection structure 103.
  • the first carrier section 131, the second carrier section 132 and the connecting structure 103 form a self-supporting unit.
  • connection structure 103 is designed to be deformable to compensate for a change in distance (in particular along the x-axis) between the first cell connector 110 and the second cell connector 120.
  • the connecting structure 103 consists of an elastically deformable material in order to compensate for a corresponding change in distance between two cell connectors 110, 120 without breaking.
  • the connection structure 103 can be designed in such a way that elastic deformation is possible along a predetermined spatial direction.
  • the individual battery cells 151 are arranged next to one another along a first spatial direction (for example the x-axis) and are correspondingly connected to the cell connectors 110, 120.
  • a second spatial direction orthogonal to the first spatial direction (for example y-axis) describes an extension of the battery cell in the arrangement plane 201.
  • a third spatial direction (z-axis), which is, for example, parallel to the normal of the arrangement plane 201 and along which the battery poles 101 extend , 102 extending from a cell connector 110, 120 is in particular orthogonal to the first spatial direction (x-axis) and the second spatial direction (y-axis).
  • connection structure 103 has a loop-shaped, curved or undulating, in particular meander-shaped, course.
  • the course of the connection structure 103 runs in particular within the arrangement plane 201, in which the first cell connector 110 and the second cell connector 120 are also arranged.
  • the course is like this designed that the rigidity in the x-direction is smaller than in the y-direction and / or z-direction. Expansions or contractions in the x direction can thus be compensated for without tension and corresponding defects occurring in the connection structure 103 or in the cell connectors 110, 120.
  • a stiffening element 109 can be releasably attached.
  • the stiffening element 109 results in the cell connectors 110, 120 and the carrier element 130 being stiffened during the assembly of the system 100 on battery poles 101, 102 and thus more robust, so that handling is easier, in particular using automated tools, and less damage to the system 100 during assembly.
  • a reinforcing beam 109 can be fastened to the carrier element 130 along the arrangement plane 201 in order to bring about a stiffening.
  • the reinforcement bar 109 can be removed.
  • a predetermined breaking point can be provided for this purpose between the carrier element 130 on the one hand and the reinforcing bar 109 on the other hand, so that simple removal by breaking away the reinforcing bar 109 can be provided.
  • the reinforcement element 109 leads in particular to a stiffening of the system in the x-direction.
  • the first carrier section 131 and / or the second carrier section 132 have a plurality of receiving grooves 202 for receiving signal lines 105.
  • the carrier element 130 thus receives the additional function for the stable and protected guidance of the signal line 105.
  • the signal line 105 has a meandering course with a U-shaped section, the carrier element 130 being a Has strain relief structure 113.
  • the strain relief structure 113 is designed such that the strain relief structure 113 engages in the U-shaped section in order to fix the signal line 105.
  • the strain relief structure 113 forms, for example, a projection from the carrier element 130 along a first direction (for example y-direction) which engages in the U-shaped section of the signal line 105.
  • the U-shaped section can be pressed against the projection, so that the projection brings about a strain relief.
  • the system 100 also has a coupling element 140 which is fastened, in particular releasably, between the first carrier section 131 and the second carrier section 132.
  • the coupling element 140 is arranged with the first carrier section 131 and the second carrier section 131 one after the other along an arrangement direction, in particular within an arrangement plane 201, so that the first carrier element 130, the coupling element 140 and the second carrier element 130 one after the other along the arrangement direction (x-direction) are arranged.
  • the coupling element 140 couples, for example, the first carrier section 131 and the second carrier section 132 of a carrier element 130 or a first carrier section 131 of a first carrier element 130 with a second carrier section 132 of a second carrier element 130, so that a more robust structure of the system 100 is provided.
  • the coupling element 140 has a further receiving groove (for example an open groove or a closed groove designed as a bore) for receiving the signal line 105.
  • a further receiving groove for example an open groove or a closed groove designed as a bore
  • the coupling element 140 also has, for example, an electrical connector device 141 for coupling a signal component, in particular a further signal line.
  • the electrical plug device 141 is designed in particular as a plug socket.
  • the first fastening section 111 and the second fastening section 112 are connected to one another by means of a conductive connection 106.
  • the conductive connection 106 may be formed integrally and monolithically with the first and second attachment portions 111, 112.
  • the cell connector 110, 120 together with the fastening sections 111, 112 and the conductive connection 106 can be produced in a stamping process.
  • the conductive connection 106 is designed as a strip-shaped conductor.
  • the strip-shaped conductor runs in particular within the arrangement plane 202 in which the first fastening section 111 and the second fastening section 112 are also arranged.
  • the course is designed in such a way that the rigidity in the x-direction is smaller than in the y-direction and / or z-direction. Expansions or contractions in the x direction can thus be compensated for without tension and corresponding defects occurring in the conductive connection 106 or in the cell connectors 110, 120.
  • the conductor 106 has a loop-shaped, curved or wave-shaped, in particular meander-shaped, course.
  • At least the first fastening section 111 and the second fastening section 112 have, at their rectangular through openings, the corresponding clamping section 160, which in the exemplary embodiment has four elastically deformable clamping elements 161 lying opposite one another.
  • the clamping elements 161 are bent out of the arrangement plane 201.
  • the clamping elements 161 can be configured due to their dimensioning and the choice of material in such a way that the restoring force or clamping force is so great that a displacement of the battery terminal 101, 102 in the insertion direction (in the z-direction), ie perpendicular to the arrangement plane 201, is prevented.
  • the clamping forces of the clamping elements 161 are configured in such a way that the clamping force on at least two opposite side walls 203 of a battery terminal 101, 102 is approximately the same. This creates a force-neutral and therefore largely distortion-free connection between cell connector 110, 120 and battery terminal 101, 102.
  • the clamping section can have further elastically deformable clamping elements 161, which are arranged opposite one another at the through opening and are bent out of the arrangement plane 201 so that the battery terminal 101, 102 can be inserted between the clamping elements 161 and a force-symmetrical clamping force around the battery terminal 101, 102 can be provided.
  • the system 100 has a sensor 107, in particular a temperature sensor, a voltage sensor or a power sensor, which is arranged on the first cell connector 110 or on the second cell connector 120 or is integrated therein.
  • the sensor 107 is in particular coupled to one of the signal lines 105 in order to receive or forward signals.
  • the battery terminal 101, 102 has a free terminal surface 204.
  • the first battery terminal 101 protrudes, for example, from a base body 205 of a battery cell 151, the first battery terminal 101 being arranged in the first through opening such that a first surface 206 of the first cell connector 110 directed towards the base body 205 of the battery cell 151 is closer to the base body 205 than the pole surface 204.
  • the first battery terminal 101 is arranged in the first through-opening in such a way that the terminal surface 204 is coplanar with a second surface 207 of the first cell connector 110, which is opposite the first surface 206, so that a common coupling surface can be provided.
  • the coupling surface extends and lies, for example, within the arrangement plane 201.
  • a homogeneous coupling surface is thus formed on which external components, such as the heat sink 208, can be arranged in a simple manner, so that a large surface contact between the pole surface 204 and the cell connector 110 on the one hand and the external component on the other hand.
  • the heat sink 208 lies in particular flat on the coupling surface for thermal coupling.
  • the cooling body 208 can, for example, have cooling lines 209 through which a cooling medium, for example a liquid fluid, flows.
  • FIG. 3 shows a schematic illustration of a system 100 for connecting battery poles 101, 102 to a stiffening element 109 before they are attached to corresponding battery poles 101, 102.
  • FIG. 4 shows a schematic illustration of coupling elements 140 with signal lines 105 according to an exemplary embodiment.
  • the signal lines 105 are arranged in corresponding grooves in the coupling elements 140.
  • sensors 107 are arranged at one end of corresponding signal lines 105.
  • the arrangement in FIG. 4 can, for example, be prefabricated and rolled up on a corresponding carrier tape 901 (see FIG. 9).
  • the cell connectors 110, 120 can be produced together with the carrier element 130.
  • the cell connectors 110, 120 are punched and then embedded with the carrier element 130 as part of an injection molding process.
  • the stiffening element 109 can also be arranged on the carrier element 130 in the injection molding process.
  • the arrangement shown in FIG. 4 consisting of the coupling elements 140 together with the signal lines 105 and sensors 107 can be attached to the carrier elements 130 according to the arrangement from FIG. 3.
  • the system 100 produced in this way is reinforced with the stiffening element 109 and can thus be fastened in a robust manner to a multiplicity of battery poles 101, 102 of battery cells 151 of a battery module 150 in one method step.
  • the coupling element 140 has a mechanical plug connection with a carrier element 131, 132, the mechanical plug connection being formed with at least one guide rail 502 and a complementary sliding element 501 that can be plugged into the guide rail 502.
  • the guide rail 502 and the complementary sliding element 501 extend in particular along a sliding direction, for example the x-axis, along which expansion compensations are desired.
  • the coupling element 140 is thus mounted in a sliding manner with the carrier sections 131, 132 along a plug-in direction.
  • a corresponding carrier section 131, 132 can, for example, have a multiplicity of sliding elements 501 protruding in the x direction and, between the sliding elements 501, corresponding grooves which function as guide rails 502.
  • the coupling element 140 has corresponding complementary grooves and protruding sliding elements 501, so that a corresponding plug-in coupling is implemented between the coupling elements 140 and the carrier sections 131, 132.
  • the mechanical plug connection is further configured in such a way that the mechanical plug connection has one degree of freedom along a direction (e.g. along the z-axis) perpendicular to the arrangement plane 201 and has no degree of freedom along a direction opposite to the direction (e.g. along the z-axis).
  • This can be implemented, for example, in that the guide rails 502 have an open U-profile, so that the corresponding sliding elements 501 can be removed from the guide rails 502 through the open side of the U-profile.
  • FIG. 6 shows a schematic illustration of a system 100 for connecting a plurality of battery cells 151 of a battery module 150 according to an exemplary embodiment. It becomes clear that a multiplicity of battery cells 151, which are arranged in particular along an arrangement direction (for example x-axis), can be provided. Furthermore, battery cells 151 connected in parallel can also be arranged, for example.
  • the system 100 can furthermore have a first system contact 601 and a second system contact 602 at edge regions which the corresponding battery power of the battery module 150 can be drawn.
  • FIG. 6 two rows of cell connectors 110, 120 are shown in FIG. 6.
  • these can also be reinforced by means of electrically insulating frame elements 603, 604 in order to form a robust support or assembly frame.
  • the frame elements 603 are fastened, for example, to the carrier sections 131 in order to create a stiffening frame structure with two opposing rows of cell connectors 110, 120.
  • further frame elements 604 can be arranged, which are fastened to the connection structures 103 of the opposing cell connectors 110, 120.
  • the frame elements 603, 604 can be produced together with the carrier elements 130 in a common injection molding process.
  • the frame elements 603, 604 can be produced from the same material as the carrier elements 130.
  • the frame elements 603, 604 can be produced from a different material than the carrier elements 130.
  • a robust and self-supporting frame structure is thus formed with which two or more rows of battery poles 101, 102 can be electrically and mechanically coupled to the cell connectors 110, 120 in one assembly step.
  • FIG. 7 shows a schematic illustration of an attachment of a cell connector 110 to a battery pole 101 according to an exemplary embodiment.
  • the clamping elements 161 each have a bending section 162 and a contact section 163, the bending section 162 being integrally connected to the first fastening section and having a bend out of the arrangement plane 201.
  • the Bending portion 162 is integrally connected to the contact portion 163.
  • the contact section 163 has a clamping surface which can be coupled in a force-transmitting manner to the side wall 203 of the first battery terminal 101. The larger the clamping surface, the better current can be transmitted between the clamping element 161 and the battery terminal 101.
  • the contact section 163 is designed such that the clamping surface of the contact section 163 in the unstressed state extends from an edge of the through opening, in particular pyramidal or conical, in the direction of the center of the through opening.
  • the clamping element 161 has an end section 164 with a free end, the contact section 163 being arranged between the bending section 162 and the end section 164.
  • the end section 164 extends opposite the clamping surface of the contact section 163 in such a way that the end section 164 is free of contact with the side wall 203 of the first battery terminal 101 when the clamping surface is coupled in a force-transmitting manner to the side wall 203 of the first battery terminal 101.
  • assembly aids can more easily grip the clamping element 161 at the free end and move it away in order to provide an assembly aid accordingly.
  • a clamping ring 165 can be arranged around the clamping elements 161 in order to prevent the clamping connection from being released.
  • the clamping ring 165 is braced, in particular, releasably around the clamping elements 161 and presses them uniformly into the center of the through opening and thus against side walls 203 of an inserted battery terminal 101.
  • the insulation element 801 consists in particular of an electrically insulating material such as plastic. Furthermore, the insulation element 801 be integrally and monolithically coupled to the coupling element 140 or the carrier element 130.
  • the insulation element 801 is arranged in particular on the conductive connection 106 of a cell connector 110. In particular, the insulation element 801 is arranged between the cell connector 110 and the base body 205 of a battery cell 105 with a sufficiently large distance 802.
  • FIG. 9 shows a schematic illustration of a rollable carrier tape 901 for coupling elements 140 according to an exemplary embodiment.
  • a multiplicity of coupling elements 140 (or also carrier elements 130) can be detached, in particular by means of an adhesive connection, to which carrier tape 901 is temporarily attached.
  • FIG. 10 shows a schematic illustration of an attachment of a cell connector 110 to a battery pole 101, 102 according to an exemplary embodiment.
  • the clamping elements 161 are bent outwards.
  • the cell connector 110 has the first surface 206, for example.
  • the clamping elements 161 are bent in the direction of a second surface 207 of the cell connector 110, which is opposite the first surface 206.
  • the cell connector 110 can be arranged closer to the battery cell 151.
  • the clamping elements 161 form a sufficient clamping surface with the corresponding side walls 203 of the battery terminals 101, 102.
  • FIG. 11 shows a schematic representation of an assembly aid with a relief mandrel 1103 according to an exemplary embodiment.
  • the cell connector 110 has a mounting opening 1101.
  • the end section 164 accordingly has a receiving opening 1102.
  • the assembly opening 1101 and the coupling point or receiving opening 1102 are arranged in such a way that the relief mandrel 1103 passes through the assembly opening 1101 can be plugged in and can be coupled to the coupling point in such a way that the end section 164 and the contact section 163 can be bent away against the clamping direction for decoupling with the first battery terminal 110.
  • the clamping element 161 is bent in a direction opposite to the central axis of the through opening and, for example, out of the through opening by means of the relief mandrel 1103, before and while the cell connector 110 is plugged onto the battery terminal 101.
  • the clamping force is, so to speak, reduced by means of the assembly element or relief mandrel 1103.
  • FIG. 12 shows a schematic illustration of an assembly aid with a stamp 1201 according to an exemplary embodiment.
  • the stamp 1201 is inserted from an upper side 207 (which is directed away from the battery cell 151) of the cell connector 110 into the first through opening (in particular in the direction of the battery cell 151) in order to preload the clamping element 161 (and correspondingly out of the center of the through opening to bend).
  • the first battery pole 101 is inserted into the first through-opening from the underside 206 (which is closest to the battery cell 151) of the cell connector 110 until a predetermined position is reached in the first through-opening.
  • the stamp 1201 is then pulled out of the through opening and the clamping element 161 clamps the side wall 203 of the first battery terminal 101.
  • connection structure 205 base body
  • strain relief structure 120 second cell connector 501 sliding element

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention porte sur un système (100) destiné à connecter des pôles (101, 102) de batteries d'éléments de batteries prismatiques indépendants d'un module de batteries qui produit plus de 30 A. Un connecteur d'éléments de batterie (110) électriquement conducteur est formé d'une première partie de fixation (111) et d'une deuxième partie de fixation (112). La première partie de fixation a une première ouverture traversante destinée à recevoir un premier pôle (101) de batterie, et la deuxième partie de fixation a une deuxième ouverture traversante destinée à recevoir un deuxième pôle (102) de batterie. La première partie de fixation et la deuxième partie de fixation sont agencées dans un plan d'agencement (201). Au moins la première partie de fixation a dans l'ouverture traversante une partie de serrage (160) pourvue d'au moins un élément de serrage (161) déformable élastiquement, lequel a été tordu hors du plan d'agencement (201) et se projette dans la première ouverture traversante de sorte que, lorsque le premier pôle (101) de batterie est introduit, l'élément de serrage (161) peut être précontraint afin de générer une force de serrage et une connexion par serrage peut être établie entre la première partie de fixation (111) et au moins une paroi latérale (203) du premier pôle (101) de batterie.
EP21722125.8A 2020-04-23 2021-04-22 Moyens de mise en contact de pôles à fort courant par branchement pour éléments de batteries Pending EP4139988A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020111100.2A DE102020111100A1 (de) 2020-04-23 2020-04-23 Steckbare hochstromfähige Polkontaktierung für Batteriezellen
PCT/EP2021/060485 WO2021214199A1 (fr) 2020-04-23 2021-04-22 Moyens de mise en contact de pôles à fort courant par branchement pour éléments de batteries

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EP4139988A1 true EP4139988A1 (fr) 2023-03-01

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EP (1) EP4139988A1 (fr)
DE (1) DE102020111100A1 (fr)
WO (1) WO2021214199A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102022125074B3 (de) 2022-09-29 2023-12-14 Lisa Dräxlmaier GmbH Kontaktelement zum elektrisch leitfähigen kontaktieren eines batteriezellengehäuses

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE10160871A1 (de) 2001-12-12 2003-07-10 Bosch Gmbh Robert Elektrisches Kontaktelement
JP5595830B2 (ja) * 2009-08-26 2014-09-24 株式会社東芝 電池、組電池及び組電池の製造方法
DE102010019935A1 (de) 2010-05-08 2011-11-10 Volkswagen Ag Kontaktelement
JP2012059658A (ja) * 2010-09-13 2012-03-22 Auto Network Gijutsu Kenkyusho:Kk バスバー
JP2012084318A (ja) 2010-10-08 2012-04-26 Auto Network Gijutsu Kenkyusho:Kk バスバーモジュール
JP2012252811A (ja) * 2011-05-31 2012-12-20 Sanyo Electric Co Ltd 電源装置、電源装置を備える車両、バスバー
JP6150905B2 (ja) * 2013-12-25 2017-06-21 矢崎総業株式会社 電池配線モジュールの製造方法
JP6177352B2 (ja) 2013-12-25 2017-08-09 矢崎総業株式会社 電池配線モジュール
DE102016223464A1 (de) 2016-11-25 2018-05-30 Robert Bosch Gmbh Verbindungsvorrichtung zur elektrischen Verbindung von elektrischen Speichereinheiten

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WO2021214199A1 (fr) 2021-10-28

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