Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
  • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
  • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
  • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • 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
  • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
• • 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 is based on a battery module according to the species of the independent claim.
• the present invention also relates to a method for producing such a vehicle and to a vehicle.
• battery modules can consist of a plurality of individual battery cells which can be electrically conductively connected to one another in series and/or in parallel, so that the individual battery cells are connected together to form the battery module. Furthermore, such battery modules are interconnected to form batteries or entire battery systems.
• the battery cells are designed as lithium-ion battery cells. Comparably high energy densities can be achieved with such lithium-ion battery cells, which allow a more compact design of the battery.
• An electrical interconnection of the plurality of battery cells is predominantly formed by so-called cell connectors.
• Cell connectors are used to connect smaller battery cells (e.g. 18650 cells) to larger battery modules, thus scaling both energy and power.
• the cell connectors are permanently connected to the battery cells, e.g. using technology such as resistance welding or bonding.
• a battery module with the features of the independent claim offers the advantage that a plurality of battery cells can be electrically connected in series and/or in parallel in a comparatively quick and easy manner.
• a battery module with a plurality of battery cells which are designed in particular as lithium-ion battery cells, is made available.
• These battery cells each include a housing in which electrochemical components of the battery cell are accommodated, and which also forms a first voltage tap of the battery cell, such as a negative voltage tap of the battery cell.
• the battery module includes a cell holder with a plurality of cell receptacles. A battery cell is accommodated in each of these cell receptacles.
• an electrical contact element is also accommodated in each of the cell receptacles, which is arranged between the cell holder and the battery cell. At this point it should be noted that the electrical contact element can also be integrated into the cell receptacle.
• the electrical contact element makes mechanical and electrical contact with the first voltage tap of the respective battery cell.
• the electrical contact element also comprises a plurality of spring elements which are connected to one another and are designed to be elastic.
• the invention offers the particular advantage that the battery cells can be electrically conductively contacted at their first voltage tap, for example simply by being accommodated in a cell receptacle in which an electrical contact element is already accommodated. This enables a comparably high level of flexibility during assembly and, at the same time, simple disassembly of the battery cells that are to be removed from the cell receptacle or cell holder. In particular, on more expensive and complex Process techniques for a material connection, such as bonding or welding, are dispensed with.
• the electrical contact element can be designed in a simple manner as a stamped and bent part.
• the battery cells also each have a second voltage tap which is electrically insulated from the housing, such as a positive voltage tap, for example.
• a first cell connector can electrically conductively connect the electrical contact elements of at least two battery cells to one another and a second cell connector can electrically conductively connect the second voltage taps of the at least two battery cells.
• an electrically parallel interconnection of the at least two battery cells is formed.
• the first cell connector is integrated into the cell holder and/or is mechanically connected to the respective electrical contact element.
• this mechanical connection can be formed in a material-to-material and/or form-fitting manner.
• simple assembly is possible, for example, in that an electrically conductive connection can be formed between the first cell connector and the electrical contact element, in particular simply by receiving the electrical contact element in the respective cell receptacle.
• an integration also includes mechanically reversible and thus detachable connections between the first cell connector and the cell holder.
• this connection can be made before the electrical contact element is received in the cell receptacle be formed.
• these two embodiments can also be combined in such a way that a first cell connector integrated into the cell holder is mechanically connected to this electrical contact element after the electrical contact element has been received.
• a third cell connector can electrically conductively connect the electrical contact element of a battery cell to the second voltage tap of another battery cell.
• one battery cell is electrically connected in series below the other battery cell.
• both the one battery cell and/or the other battery cell can be electrically conductively connected in parallel to a further battery cell in each case by means of a first cell connector or a second cell connector.
• the second cell connector is electrically conductively connected to the second voltage tap of the respective at least one battery cell.
• the third cell connector is electrically conductively connected to the electrical contact element of one battery cell and/or the second voltage tap of the other battery cell.
• Such an integral connection can be formed, for example, by means of techniques known from the prior art, such as bonding, ultrasonic welding, laser beam welding, or spot welding.
• the battery cells are each designed as cylindrical battery cells.
• Cylindrical battery cells usually include a lateral surface and two opposing base surfaces arranged parallel to one another. Furthermore, these two base areas each have a circular shape and close off the outer surface.
• the lateral surface is designed as the first voltage tap of the respective cylindrical battery cell and the second voltage tap is designed on a base area of the respective cylindrical battery cell.
• the cylindrical battery cells can be designed as so-called 18650 cells or 20700 cells.
• the cell receptacles are each designed as an opening in the cell holder and, in particular, have a round cross-sectional area.
• the electrical contact elements and the plurality of battery cells can be accommodated in a simple manner.
• cylindrical battery cells can be accommodated in a simple manner.
• the spring elements of the electrical contact element are expediently designed as lamellae.
• the electrical contact element can, for example, comprise at least two ring-shaped base bodies, which are arranged opposite one another and between which the spring elements designed as lamellae extend in such a way that one end of the respective lamella is connected to one of the two base bodies and the other end of the respective slat is connected to the other of the two base bodies.
• the slats can be arranged in any design.
• the lamellae are arranged at regular intervals from one another and/or are arranged, for example, running essentially parallel to one another. Furthermore, it is also preferred if the lamellae have a curvature or development, which are directed in the direction of an interior of the respective electrical contact element, so that a spring force can be exerted on the respective battery cell, which in the respective electrical contact element or the respective electrical contact element associated cell recordings are included.
• the spring elements can be designed in a wide variety of ways, as long as electrical and mechanical contacting of a battery cell can be formed.
• such spring elements offer the advantage that a comparable number of contact points are formed, thereby ensuring electrical contacting of the battery cell over the service life.
• this offers the particular advantage that the shape of the electrical contact element or the properties of the individual spring elements can influence the force exerted on the battery cell by the electrical contact element, whereby comparably firm or loose connections can be formed according to the respective requirements.
• the subject matter of the present invention is also a method for producing a battery module according to the invention just described, having a plurality of battery cells, in particular lithium-ion battery cells.
• the battery cells each include a housing in which electrochemical components of the battery cell are accommodated and which forms a first voltage tap of the battery cell.
• An electrical contact element and a battery cell are accommodated in the cell receptacles of a cell holder, so that the electrical contact element is arranged between the cell holder and the battery cell and mechanically and electrically contacts a first voltage tap of the respective battery cell.
• the electrical contact element comprises a plurality of spring elements which are connected to one another and are designed to be elastic.
• Figure 1 in a perspective view an embodiment of a
• FIG. 2 shows a plan view of an embodiment of a cell holder of a battery module according to the invention, in which electrical contact elements are accommodated,
• FIG. 3 shows a detailed view of an embodiment of a cell holder of a battery module according to the invention, in which electrical contact elements are accommodated and
• FIG. 1 shows a perspective view of an embodiment of a cell holder 2 of a battery module 1 according to the invention, in which electrical contact elements 4 and a battery cell 5 are accommodated.
• FIG. 2 shows a plan view and FIG. 3 a detailed view of the embodiment of a cell holder 2 of a battery module 1 according to the invention as shown in FIG. 1, in which electrical contact elements 4 are accommodated.
• Figures 1 to 3 each show a cell holder 2 of a battery module 1.
• the cell holder 2 comprises a plurality of cell receptacles 3.
• FIG. 1 shows a battery cell 5 being accommodated in a cell receptacle 3 .
• the cell receptacles 3 are in particular each formed as an opening 30 in the cell holder 2 and in particular have a round cross-sectional area 35 .
• the battery cell 5 is designed in particular as a lithium-ion battery cell 50 and also includes, for example, a housing 51 in which electrochemical components of the battery cell 5 that cannot be seen in the figures are accommodated.
• the housing 51 of the battery cell 5 forms a first voltage tap 61 of the battery cell 5 .
• the battery cells 5 also each have a second voltage tap 62 that is electrically insulated from the housing 51.
• the battery cells 5 are designed as cylindrical battery cells 10 .
• a lateral surface 11 of the housing 51 forms the first voltage tap 61 and a base surface 12 of the housing 51 forms the second voltage tap 62 .
• the electrical contact element 4 is arranged between the cell holder 2 and the battery cell 5 . Furthermore, the electrical contact element 4 contacts the first voltage tap 61 of the respective battery cell 5 mechanically and electrically.
• the electrical contact element 4 comprises a plurality of spring elements 7 which are connected to one another and are designed to be elastic.
• the spring elements 7 of the electrical contact element 4 are designed in particular as lamellae 70 .
• First cell connectors 81 can connect the electrical contact elements 4 of at least two battery cells 5 to one another in an electrically conductive manner.
• Second cell connectors 82 which cannot be seen in the figures, can connect the second voltage taps 62 of the at least two battery cells 5 to one another in an electrically conductive manner. As a result, the at least two battery cells 5 are electrically connected in parallel.
• the first cell connectors 81 are integrated into the cell holder 2 and are also mechanically connected to the respective electrical contact element 4 . This connection is preferably formed as a material bond.
• a third cell connector 83 to electrically conductively connect the electrical contact element 4 of a battery cell 5 to a second voltage tap 62 of another battery cell 5 . As a result, an electrically parallel connection of one battery cell 5 to the other battery cell 5 is formed.
• the second cell connector 82 can be electrically conductively connected to the second voltage tap 62 of the respective at least one battery cell 5 and/or the third cell connector 83 to the electrical contact element 4 of one battery cell 5 and/or the second voltage tap 62 of the other battery cell 5.
• FIG. 2 shows different embodiments of electrical contact elements 4, each of which includes a plurality of spring elements 7.
• the electrical contact element 4 can, for example, comprise at least two ring-shaped base bodies 75 which are arranged opposite one another and between which the spring elements 7 embodied as lamellae 70 extend in such a way that one end of the respective lamella 70 is connected to one of the two base bodies 75 and another end of the respective lamella 7 is connected to the other of the two base bodies 75 .

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=82196536

Family Applications (1)

Country Status (4)

Family Cites Families (6)

• 2021
  • 2021-06-11 DE DE102021205961.9A patent/DE102021205961A1/de active Pending
• 2022
  • 2022-06-07 CN CN202280041568.0A patent/CN117461196A/zh active Pending
  • 2022-06-07 EP EP22733345.7A patent/EP4352817A1/de active Pending
  • 2022-06-07 WO PCT/EP2022/065409 patent/WO2022258623A1/de active Application Filing

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