EP4659303A1 - Unité de mise en contact d'éléments de batterie - Google Patents

Unité de mise en contact d'éléments de batterie

Info

Publication number
EP4659303A1
EP4659303A1 EP24705057.8A EP24705057A EP4659303A1 EP 4659303 A1 EP4659303 A1 EP 4659303A1 EP 24705057 A EP24705057 A EP 24705057A EP 4659303 A1 EP4659303 A1 EP 4659303A1
Authority
EP
European Patent Office
Prior art keywords
cell
sensor
contact unit
holder
contact
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
EP24705057.8A
Other languages
German (de)
English (en)
Inventor
Jonathan Markert
Fernando Perez Lazcano
Markus Rau
Toralf SEIDEL
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.)
Leoni Bordnetz Systeme GmbH
Original Assignee
Leoni Bordnetz Systeme 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 Leoni Bordnetz Systeme GmbH filed Critical Leoni Bordnetz Systeme GmbH
Publication of EP4659303A1 publication Critical patent/EP4659303A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/364—Battery terminal connectors with integrated measuring arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • 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
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals

Definitions

  • the invention relates to a cell contact unit for a battery with several cells.
  • a cell contact unit is used to electrically connect several cells of a battery.
  • the cells are connected in series and/or parallel as required so that the battery provides a certain voltage and current.
  • Several cells are lined up next to each other and form a cell stack.
  • the cells of the cell stack each form a module of the battery.
  • the battery has a width and length in the range of 0.5 m to 2 m, so that contact between the cells over a longer distance is necessary.
  • Such a cell contact unit usually has a support frame in which individual cell connectors are accommodated and held in a holding receptacle.
  • the cell poles of neighboring cells are electrically connected via a cell connector.
  • the support frame is attached to a stack of cells lined up next to one another and the individual cell connectors are electrically contacted with a cell pole of each cell. This is usually done by laser welding.
  • Each support frame is often as large as the cell stack. Due to the size, tolerance problems can arise for holding receptacles that are far apart. Different support frames are also required for different stack sizes, which leads to a high level of effort in terms of production and logistics. Due to the sometimes very high voltages of typically several 100 V, especially in traction batteries for electrically powered vehicles, additional precautions must be taken to protect against contact.
  • a so-called battery management system is usually provided, which is also designed to monitor the condition of the battery and the individual cells.
  • a sensor cable set is often provided for this purpose.
  • the invention is based on the object of specifying a cell contacting unit in which the production and preferably also the handling is simplified and/or reliable operation is ensured.
  • a cell contact unit for a battery with several cells wherein adjacent cells are electrically connected to one another via cell connectors
  • the cell contact unit has a sensor cable set with at least one sensor line that is electrically connected to the cell for measuring the cell voltage and is protected against overcurrent.
  • the sensor line is electrically connected to a tapping point for the cell voltage (potential tapping) by means of a bonding wire and by bonding.
  • the bonding wire is in particular a bare metal wire which is directly electrically connected to the tapping point by the known bonding process. Due to the direct bonding, no separate connection element is required to connect the sensor line to the tapping point for voltage measurement. Such a voltage measurement is usually required for each cell of a battery, particularly in the context of battery monitoring and the battery management system. The cell voltage is generally recorded by the voltage tap.
  • the various cell connectors are generally held within at least one holder.
  • several cell connectors and in particular all cell connectors arranged in a row are held together within a holder.
  • this has a large number of receptacles for the individual cell connectors.
  • a modular structure of the cell contact unit is provided, in which several individual holders, each of which preferably holds exactly one cell connector, are lined up next to one another.
  • the holder(s) are each made of insulating material and are designed in particular as plastic injection-molded parts.
  • the bonding wire itself forms an overcurrent fuse with a predetermined fuse rating.
  • the bonding wire is therefore designed as a fuse element, in particular as a fusible fuse wire. A separate fuse is therefore not required and is dispensed with.
  • the fuse rating is defined by the properties of the bonding wire.
  • the geometric properties i.e. the length and/or the cross-sectional area, are set appropriately.
  • the bonding wire has a fuse rating in the range of 250 mA to 5 A and in particular in the range of 750 mA to 1.5 A.
  • the bonding wire consists in particular of aluminum or an aluminum alloy.
  • it consists of a silicon-aluminum alloy with a silicon content of, for example, 1%.
  • Its diameter is, for example, in the range between 25 pm and 150 pm and especially in the range from 50 pm to 100 pm.
  • Its length is preferably in the range of 10 mm to 30 mm and in particular 15 mm.
  • One end of the bonding wire is directly connected to a respective cell connector. Since the cell connector is in direct electrical contact with the cell pole of the cell, a voltage tapping point is defined by the cell connector.
  • the bonding wire is preferably connected with its other end to a contact element, in particular a crimp contact. It is preferably also connected to this by bonding.
  • the sensor line is in turn connected to the contact element itself, in particular by crimping.
  • the bonding wire is therefore preferably electrically contacted with both ends by bonding.
  • a cell contacting unit with the features of claim 6 is provided.
  • several cell connectors form a group and several groups are lined up one after the other.
  • the sensor cable set is modular and divided into sections at the separation points. Each group has a section of the sensor cable set and the sections of adjacent groups are electrically connected to one another at the separation points. The connection of the sections takes place when the respective cell contact unit is assembled and not as part of pre-assembly.
  • connecting elements are arranged, via which a sensor line interrupted by a respective separation point is electrically reconnected, preferably individually.
  • the sensor lines are not interrupted.
  • a group preferably consists of 2 to 8 and preferably of 2 to 6 cell connectors.
  • the cable set is therefore made up of a large number of group sections connected to one another by connectors. This enables particularly simple scalability for different applications and designs of the cell contact unit. With previous sensor cable sets, these had to be specifically preconfigured for each type of cell contact unit. With the modular structure of the sensor cable set, virtually any cell contact unit with a different design can be built modularly. This simplifies assembly, increases flexibility and reduces costs.
  • the sensor cable set has at least one flat cable with individual conductor strands, wherein the flat cable runs along the cell connectors and a respective conductor strand forms at least one section of a respective sensor cable.
  • a flat cable instead of a conventional sensor cable set consisting of a large number of individual round cables/sheathed cables This results in a particularly flat structure and an overall compact design.
  • a flat cable is also particularly suitable in conjunction with the previously described first alternative with the modular structure.
  • the individual modular sections of the cable set are therefore preferably each formed by sections of the flat cable. This is therefore divided into several sections in the longitudinal direction, with each group being assigned a section of the flat cable.
  • the sensor cables and thus also the conductor strands are looped through one or more of the separation points.
  • the sensor cables required to connect a group, which forms the last connection group when viewed lengthwise, are looped through all the previous separation points and groups.
  • all sensor cables/conductor strands are preferably connected via a common cable set connector and connected to a battery management system, for example.
  • each flat cable has several conductor strands.
  • the cable set preferably has so many flat cables that the total number of conductor strands is sufficient to electrically contact all groups in a suitable manner.
  • the number of flat cables arranged next to one another is preferably reduced successively in the longitudinal direction.
  • the individual conductor strands are preferably only looped through to the respective group to which they are contacted.
  • This design means that the entire cable set is also stepped in that the number of flat cables is reduced in the longitudinal direction.
  • “arranged next to one another” means that the flat cables are arranged with their flat sides next to one another or with their flat sides one above the other.
  • a respective flat cable has a number of 2-6 and preferably 4 conductor strands.
  • the flat cable is designed as a (flexible) flexible ribbon cable.
  • the individual conductor strands for example as bare wires (solid wire or stranded wire), are arranged parallel to one another (within a layer) in a common insulating sheath and are insulated from one another by this.
  • the ribbon cable can be an extruded or a laminated cable.
  • the flexible ribbon cable offers advantages, particularly with regard to the modular structure and assembly.
  • connectors are used for one or more and in particular all of the following electrical connections:
  • connectors are used, which preferably connect individually opposing conductor strands of the two sections to one another and thereby bridge the separation point.
  • Connectors known as butt connectors are preferably used for this purpose. These are particularly elongated and have a connection terminal at their opposite end areas, particularly in the form of a crimp terminal.
  • connectors are provided for connecting the flat cable and a plug connected to it. This plug is used in particular to connect to a multi-core connecting cable that leads to the battery management system, for example.
  • These connectors are preferably located directly in a plug housing and are thus designed for a direct connection of the plug to the flat cable.
  • Exactly one connector is designed for each cable strand. This is provided, for example, with a crimp terminal at one end for connection to the conductor strand and with a plug terminal (socket or plug pin) on the other side, which forms a plug contact for the plug.
  • such a plug is connected indirectly via individual connecting lines, which are preferably designed as round conductors.
  • the connectors are preferably designed as double-sided connectors, which contact a respective conductor strand with one end and a respective connecting line with the other end.
  • the two ends are preferably each designed as suitable crimp terminals of different types.
  • Another type of connector is provided for a connection between a respective conductor strand and one of the cell connectors and/or with a sensor.
  • a connector type preferably has a welding tab for electrically contacting the cell connector and/or the sensor, so that the connector is electrically contacted with one end to the sensor or the cell connector by welding (in particular ultrasonic welding).
  • the other end is in turn preferably designed as a crimp terminal with which a respective conductor strand is electrically contacted.
  • a respective connector has a crimp terminal for contacting a respective conductor strand.
  • the connector has two crimp terminals.
  • a recess is expediently formed below a respective connector, especially at least in the area of a crimp terminal, so that the connector/crimp terminal is accessible for an assembly tool, in particular a crimp tool, which is designed for fastening and electrically connecting the connector.
  • the cell connectors of a group are held by a common holding frame.
  • the multiple holding frames are arranged in series in the assembled cell contact unit.
  • the aforementioned recess is preferably formed directly on the holding frame so that accessibility for the crimping tool is guaranteed. Since the holding frames also form the separation points for the different parts of the modular cable set, these recesses are formed in particular on the edge sides where the holding frames lie against one another.
  • a holding frame is usually provided with several recesses that are placed at the positions where a respective crimp terminal is required and provided.
  • the recesses are generally arranged in particular on a bottom side, i.e. on a side of the holding frame opposite the flat cable.
  • the flat cable generally rests on a top side.
  • the connector in particular the crimp terminal, is electrically contacted with the respective conductor strand without stripping the insulation.
  • the crimp terminal and in particular (sharp-edged) crimp flanks are therefore pressed through the insulation and contact and clamp (crimp) the respective conductor strand.
  • the object is further achieved according to the invention by a modular cell contacting unit with the features of claim 15.
  • This modular aspect is an independent inventive aspect, but can also be combined with one or more of the aspects and features described above.
  • the modular cell contact unit is designed for a battery with multiple cells and has a large number of individual holders that are modularly arranged next to one another. Each holder has at least one and preferably exactly one cell connector for electrically connecting adjacent cells.
  • the respective holder has a holding receptacle, in particular a stretching receptacle, into which a respective cell connector is inserted, in particular plugged in, and in which the cell connector is preferably held in a form-fitting manner.
  • the individual holders are typically made of an insulating material, especially plastic, whereas the cell connectors are conductive and in particular consist of metal. These holders therefore form a support frame for the cell connectors.
  • modularly arranged means that the number of holders of the cell contact unit can be selected by simply omitting or adding the individual holders.
  • the individual holders are therefore individual and in particular monolithic individual pieces that are manufactured, for example, using an injection molding process.
  • This modular structure means that different variants of cell contact units can be easily assembled and constructed using the same module components.
  • the holders are designed as identical parts, meaning that the entire support frame can be easily scaled. Overall, production and production logistics are significantly simplified.
  • this modular design allows for better positioning of the individual holders and cell connectors in relation to the respective cell, even with large batteries. Because the holders are designed as individual parts, they can preferably be moved at least slightly relative to one another. Alternatively or additionally, a respective cell connector is arranged in the respective holder so that it can move at least slightly to compensate for tolerances. Overall, this means that tolerances can be compensated even with large cell stacks, so that a respective cell connector can be positioned at the desired location in relation to the respective cell pole during assembly.
  • the holders are lined up along an assembly line and held on this.
  • the assembly line is designed in particular in the manner of a rail, specifically as a metal rail. It is therefore particularly resistant to tension and pressure and also has a high degree of rigidity, in particular a high degree of flexural rigidity.
  • the assembly line is preferably designed as a profile rail and therefore not just as a simple flat rail. Viewed in cross section, it is designed in particular as a C-profile rail.
  • the individual holders are not directly connected to one another, but rather just rest loosely against one another.
  • the individual holders are therefore only held together indirectly via the assembly line. This measure enables a simple design of the individual holders, and they do not have any connecting elements, for example, in particular no molded connecting elements for directly connecting the individual holders to one another.
  • each holder has at least one guide for the assembly line, wherein each holder with the guide is applied to the assembly line, for example pushed on or clipped (in).
  • the guide therefore extends in the longitudinal direction of the assembly line and is designed in particular in the manner of a guide channel so that the assembly line can be pushed through the guide.
  • the assembly line is held in a form-fitting manner by the guide, such that it can only be moved in the longitudinal direction and is held stationary perpendicular to the longitudinal direction.
  • the guide is designed to be C-shaped, for example, when viewed in cross-section.
  • the individual holders are virtually threaded onto this assembly line. When configuring the support frame, they are arranged in a row simply by pushing or clipping onto the assembly line.
  • each holder has two opposing guides for two assembly lines, in particular on the edge.
  • the guides are designed identically, for example. However, they preferably differ in terms of their size, for example. Accordingly, the two assembly lines are either designed identically or preferably differently.
  • the assembly lines in particular arranged opposite one another, ensure reliable and precise guidance and alignment of the individual holders.
  • the respective holding receptacle for the respective cell connector is arranged between the two guides.
  • the at least one assembly band is designed as a tensioning band, by means of which the individual cells of the battery are clamped together in the assembled state.
  • a tensioning force is exerted on two cells, in particular on the edge, with the aid of the assembly band, so that these two cells and other cells arranged between these cells are permanently compactly clamped against each other.
  • the cell stack usually has pressure plates, in particular made of metal (steel), which are attached at least to the opposite ends of the cell stack.
  • the assembly bands which are usually designed as steel bands, are welded to these pressure plates.
  • the compressibility of at least two adjacent cells is preferably achieved by placing a compression pad between these cells, which is easily compressible and has a high strength for longer-term loads.
  • the individual cells are clamped against each other in an auxiliary clamping device, so that the tensioning band is then fixed before the auxiliary clamping device is then released again.
  • the tensioning band therefore fixes and holds the cell stack in its clamped state.
  • the holders arranged next to one another form a longitudinal channel for receiving a sensor cable set Cable set.
  • Each holder defines a channel section, which is formed in particular between the at least one guide and the holding receptacle. This makes it easy to form a cable guide for the cable set as an integral part of the respective holder.
  • the cable set typically has a large number of sensor lines, each of which leads to a sensor, for example a temperature sensor, voltage sensor (at least one voltage tap), etc.
  • the sensors are connected via the cable set in particular to a battery management system, via which the battery and the individual cells are monitored.
  • edge regions of the holder adjoin the holding receptacle on both sides, which form base surfaces on a rear side, which are preferably intended to rest on at least one cell.
  • the holders In the assembled state, the holders preferably rest with the base surfaces on at least one cell, in particular on a cell housing, in the area next to a respective cell pole. At least the base surface runs parallel to the cell housing with a tolerance distance.
  • a respective holder covers two adjacent cells in some areas. The base surfaces are in particular flat.
  • the edge areas alternatively and in particular additionally form the guides on a front side.
  • the holding receptacle is preferably designed in the form of a trough that is open towards the back and thus towards the cell connector, so that the latter can be inserted from the back.
  • the trough is preferably dimensioned such that it can accommodate a respective cell pole, so that the base surfaces preferably rest on an outside of the cell next to the cell pole.
  • the bottom of the trough is preferably generally designed in such a way that it forms a cover for the cell connector and thus a contact protection.
  • the cell contact unit regularly has connection terminals and thus defines a connection for the positive pole or the negative pole of the respective cell stack (module). In the final assembled state, connection cables (battery cables) are connected to these connection terminals
  • the cell contact unit generally has - also independently of the modular structure - several temperature sensors, which are arranged in particular distributed over the length of the cell contact unit.
  • Each temperature sensor is connected to a sensor line via a contact plug.
  • the assembly and electrical connection of the temperature sensors are thereby simplified.
  • the temperature sensors are first attached to a desired position, for example by gluing, before they are subsequently connected to the sensor line.
  • the temperature sensor itself has contact pins for plugging into the contact plug.
  • the temperature sensor usually has an electronic component as a sensor element, for example a so-called NTC thermistor.
  • a respective contact plug is preferably accommodated in a plug receptacle of a respective holder and fixed there.
  • the holders and preferably all of the holders have such a plug receptacle according to the identical parts principle.
  • the contact plug can be inserted into the plug receptacle in one plugging direction and is fixed and held there.
  • the holder In the area of the plug receptacle and in particular adjacent to the plug receptacle, the holder preferably has an opening to a rear side.
  • the contact plug is attached to an opposite front side of the holder and is inserted from there into the plug receptacle.
  • the holder has one or more such plug receptacles and also openings for sensor elements.
  • the holder has at least one plug receptacle on each side of the holding receptacle.
  • the temperature sensors are in thermally conductive contact with the cell, in particular with the cell housing. A respective temperature sensor therefore rests on the cell housing. This occurs either directly or indirectly, for example, via a thermally conductive element, such as a thermal pad.
  • a so-called hot spot temperature measurement is carried out during operation via at least some of the temperature sensors.
  • the corresponding temperature sensors are preferably positioned adjacent to a cell pole or cell connector, since high temperatures occur in the area of the cell poles during operation due to the current flow.
  • At least one further temperature sensor is mounted for a so-called cold spot temperature measurement, wherein this is mounted at a distance from the cell connector.
  • This further temperature sensor therefore carries out a temperature measurement during operation at a distance from a cell pole of a respective cell.
  • the temperature sensor is in particular in thermal contact with the cell, especially with the cell housing.
  • the additional temperature sensors are arranged in particular in the area of the assembly line. In a preferred embodiment, this has sensor openings through which the respective additional temperature sensor is/will be electrically connected to the respective sensor line. In particular, the temperature sensor is immersed in such a sensor opening and preferably through it. The contact is again made via a contact plug as previously described.
  • the various temperature sensors are designed as identical parts.
  • the holders and in particular an edge-side holder have an opening with a positioning element, wherein the positioning element for fixing the assembly tape in place engages in the sensor opening.
  • the positioning element is designed in particular as a web, in particular a web running around the opening. This running web preferably fits precisely into the sensor opening. The additional temperature sensor is therefore particularly protected in this opening, which therefore forms a type of sensor holder.
  • An edge-side holder forms the end of the cell contact unit and preferably only accommodates a cell connection instead of a normal cell connector, which is connected in particular to the connection terminal or is a part of it.
  • the cell connection is used - similar to a cell connector - to electrically contact the cell pole of an edge-side cell. A connection to a connection cable is then possible via the connection terminal.
  • a cell contact unit for a battery with multiple cells wherein in the assembled state of the cell contact unit, adjacent cells are electrically connected to one another via the cell connectors and the cell connectors are held in at least one holder.
  • a measuring sensor in particular a temperature sensor, is also attached to the holder in a holder connected to the holder.
  • the measuring sensor is held elastically in the holder.
  • the holder is therefore designed to be suitable and flexible in order to enable the desired elastic fastening.
  • the measuring sensor is preferably held elastically at least in the longitudinal direction of the cell contact unit.
  • a temperature sensor instead of a temperature sensor, another measuring sensor, such as a voltage measuring sensor, can be used and held elastically.
  • the measuring sensor generally records a state variable of the battery or a cell of the battery.
  • the temperature sensor records the temperature of the battery or at least one cell.
  • the temperature sensor is in either direct or indirect heat-conducting contact with the cell, for example via a contact pad.
  • This contact pad or generally a thermal contact element to a temperature measuring location, is usually firmly connected to this temperature measuring location.
  • the measuring sensor is (firmly) connected to the measuring location with a measuring element.
  • the measuring location is, for example, a typically metallic housing of the cell or, for example, a cell pole in the case of a voltage measurement.
  • the contact element is preferably attached to this measuring location. This can be done, for example, by a material-locking connection such as gluing or the previously described bonding using a bonding wire or by another connection.
  • the problem is that, for example, changes in temperature can cause different length expansions between the cell contact unit and the battery/cells, so that the cell contact unit and thus the measuring sensor may shift relative to the (fixed) measuring location.
  • the elastic mounting of the measuring sensor on the cell contact unit therefore enables length compensation so that the contact between the measuring sensor and the measuring location is as free from mechanical stress as possible. This at least reduces the risk that the (thermal) contact between the temperature sensor (measuring sensor) and the measuring location is impaired, which could lead to incorrect (temperature) measurements.
  • the holder together with the at least one holder forms a monolithic component.
  • a monolithic injection-molded component In particular, a monolithic injection-molded component.
  • the holder is generally made of plastic.
  • the holder In order to exert the elastic holding force on the measuring sensor, the holder has, in a preferred development, at least one curved holding tab on which the measuring sensor is in contact with.
  • This curved retaining tab keeps the measuring sensor elastic and therefore flexible.
  • the retaining tab forms a spring tab and thus a spring-loaded holder.
  • the retaining tab is part of the monolithic injection-molded component.
  • a retaining tab is arranged on both sides of the measuring sensor.
  • the measuring sensor generally usually has a (thermal or electrical) contact element for (thermal or electrical) contact with the (temperature) measuring location.
  • This contact element is designed as an electrical sensor component or is connected to such a component.
  • the measuring sensor also usually includes sensor electronics to generate a sensor signal. This is transmitted via a corresponding sensor line to an evaluation unit, which is, for example, part of the battery management system.
  • this sensor cable is connected to the measuring sensor via a contact plug.
  • the measuring sensor has a circuit board with sensor electronics mounted thereon as well as connections, in particular plug connections for connecting the sensor cable.
  • FIG 1 is a perspective view of a cell contact unit
  • FIG 2A is a partially enlarged view of the cell contact unit according to FIG 1 with a view of the rear side
  • FIG 2B is a partially enlarged view of the cell contact unit according to FIG 1 with a view of the front
  • FIG 3 is a perspective view of a holder looking towards a front side
  • FIG 4 perspective view of the holder according to FIG 3 looking towards a rear side
  • FIG 5 is a partial perspective view of the cell contact unit according to FIG 1,
  • FIG 6 shows the view according to FIG 5, but with one of the holders hidden so that the view of the cell connector and other components in the holder is clear
  • FIG 7 is an enlarged partial perspective view of the cell contact unit in the area of two adjacent cell poles, with several components hidden, to explain the arrangement of a temperature sensor
  • FIG 8 is an enlarged partial perspective view of an end region of the cell contact unit according to FIG 1,
  • FIG 9 is a highly simplified, partial plan view of a cell contact unit with a modular sensor cable set
  • FIG 10 is a perspective, partial view from above of a cell contact unit with a temperature sensor elastically held in a holder
  • FIG 11 the view according to Figure 10, with the contact plug hidden and a transparent printed circuit board and
  • FIG 12 is a perspective view from above of a holder for the cell connectors with the monolithically formed holder for the temperature sensor.
  • FIG 1 shows a cell contact unit 6 for a battery (not shown here in more detail), which is preferably intended for an electric motor-driven motor vehicle and is also used there as a traction battery.
  • the battery is usually made up of several modules that are interconnected. Each module in turn has a large number of individual (battery) cells that are lined up in a longitudinal direction L and form a cell stack. The individual cells are often cuboid-shaped / prismatic.
  • the cell contact unit 6 extends accordingly along the longitudinal direction L, as well as in a vertical direction V. In a transverse direction Q, the cells. Longitudinal direction L, transverse direction Q and vertical direction V form a Cartesian coordinate system.
  • the individual cells of a module are electrically connected to one another in series via the cell contact system.
  • a pair of cells is electrically connected to one another via a respective cell connector 8 (FIG. 2).
  • connection terminals 10 on the edge and opposite each other in the longitudinal direction L to each of which a connection cable is connected in the assembled state.
  • the entire battery usually has a battery management system, which is designed, among other things, to monitor the current state of the battery and in particular the individual cells.
  • the module and in particular the cells are generally equipped with a sensor system that is connected via a cable set 12 and is connected to the battery management system when installed.
  • the cable set 12 has a large number of individual sensor lines 14.
  • the cable set 12 has a multi-pin plug 16 at one end, via which the cable set 12 can be connected to the battery management system, for example.
  • a large number of individual holders 18 made of insulating material are lined up in the longitudinal direction L.
  • Each of the holders 18 accommodates a cell connector 8.
  • the individual holders 18 are designed in particular as (plastic) injection-molded parts and specifically as identical parts.
  • the individual holders 18 are lined up along at least one assembly line 20, in the exemplary embodiment two assembly lines 20, namely a lower assembly line 20A and a preferably different, in particular narrower, upper assembly line 20B.
  • the holders 18 are pushed and/or clipped onto a respective assembly line 20 and held in a form-fitting manner.
  • the assembly lines 20 are designed as profile rails, in particular made of metal.
  • the holders 18 and overall also the respective cell contacting unit 6 each have a rear side 22 oriented towards the cells (see FIG 2A) and an opposite front side 24 (see FIG 2B).
  • the individual holders 18 are rectangular in shape when viewed in the transverse direction Q and have opposite side edges in the longitudinal direction L, which preferably run in a straight line.
  • the individual holders 18 lie flat and preferably loosely against one another with these side edges. They are connected to one another and held together only by the assembly bands 20.
  • the assembly bands 20 are preferably designed as tensioning bands and ensure that in the final assembled state the individual cells are held against each other in the longitudinal direction L.
  • the assembly bands 20 are mechanically fastened to the cell stack at least in a suitable manner.
  • a respective holder 18 - as can be seen in particular from FIG 3 and FIG 4 - has in the exemplary embodiment a central holding receptacle 26 which is designed in the manner of a trough and is open towards the rear side 22.
  • the cell connector 8 is arranged in the holding receptacle 26.
  • Edge regions 28 adjoin both sides in the vertical direction V. These form flat base surfaces 30 on the rear side 22, with which the holder 18 rests on a respective cell in the assembled state or is at least positioned in particular parallel to an outer side of the cell with a small distance.
  • the holder 18 forms a central cover 32, which limits the holding receptacle 26 towards the front side 24 and forms a contact protection.
  • the edge regions 28 each form a guide 34 at opposite end regions in the vertical direction V, namely a lower guide 34A for receiving the lower assembly belt 20A and an upper guide 34B for receiving the upper assembly belt 20B.
  • the guides 34 each have in particular hook-shaped holding elements which engage around the respective assembly belt 20 so that they are held in a form-fitting manner in the transverse direction Q.
  • the guides 34 each form a type of guide channel into which the assembly belts 20 can be pushed or inserted/clipped in or with which the respective holders 18 can be pushed or clipped onto the assembly belts 20.
  • the holding elements are designed, for example, as continuous strips (lower guide 34A) or as individual shaped elements (upper guide 34B) which only extend over a portion of the length of the holder 18.
  • the two edge regions 28 preferably each have the same width in the vertical direction V.
  • the upper edge region 28 has a channel section 36 in addition to the upper guide 34B.
  • the channel sections 36 arranged in a row form a cable channel 38 in which the cable set 12 lies.
  • the sensor lines 14 of the cable set 12 are held by individual holding elements designed as clips 40.
  • the holder 18 is also designed to accommodate sensor elements, for example temperature sensors, pressure sensors, voltage taps, etc., which are each connected via the individual sensor lines 14.
  • sensor elements for example temperature sensors, pressure sensors, voltage taps, etc.
  • plug receptacles 42 are formed on the holder 42, in which connection elements for connecting the sensor lines 14 are arranged.
  • a respective cell connector 8 has two contact tabs 44 which are opposite one another in the longitudinal direction L and are in particular approximately strip-shaped. which are connected to one another via an intermediate part 46. This is preferably designed for length compensation and in the exemplary embodiment is in particular wave-shaped. Furthermore, the cell connector 8 has a connection area, in particular formed by a connection tab 48, which is used for a voltage tap. The cell connector 8 also has two, in particular circular, pole openings 50. These are in particular formed in the middle of each contact tab 42.
  • the contact tabs 44 are placed flat on a respective cell pole of the cell.
  • the cell pole is preferably approximately cuboid-shaped. It also preferably has an upwardly protruding contact pin with a typically circular cross-section.
  • the pole openings 50 are each slipped over this contact pin and preferably accommodate it with a precise fit (with insertion play). This ensures and enables correct positioning and also a checking of the positioning.
  • the checking of the positioning is preferably carried out using the edges of the cuboid-shaped cell pole, for example.
  • the assembly of the respective cell contact unit 6 is carried out as follows: First, the individual holders 18 are fitted with the required components, specifically with the cell connector 8 and preferably with at least some of the sensor elements, such as the aforementioned connection elements, in particular contact plugs. The holders 18 are then successively pushed or clipped onto the two assembly lines 20. The cable set 12 is then assembled and the individual sensor lines 12 are connected to the sensor elements. A functional test is preferably carried out afterwards. The cell contact units 6 thus completed are then typically packaged and delivered to an assembly location where the battery is assembled.
  • the cell contact units 6 are attached to the cell stack to form the module.
  • the individual cell connectors 8 are electrically connected to the Cell poles of the cells are electrically and mechanically connected, in particular by welding.
  • the individual cells of the module are preferably also held together mechanically via the assembly bands 20, in particular in a tensioned state in which the cells are pressed against one another with a tensioning force in the longitudinal direction.
  • the assembly bands 20 are mechanically connected to the cell stack in a suitable manner, in particular by welding.
  • the cell stack usually has pressure plates, in particular made of metal, which are attached at least to the opposite ends of the cell stack and, if required, more are attached distributed along the length. These pressure plates are attached in particular so as to be electrically insulated from the cells.
  • the assembly bands 20 are welded to these pressure plates.
  • the assembly lines 20 are electrically insulated from the cell housings, which are also typically made of metal. This is achieved in particular by the holders 18 made of plastic.
  • a (double-sided) adhesive tape is also attached, with which the cell contact unit 6 is additionally held to the cells and thereby also mechanically couples the individual cells to one another.
  • the adhesive tape is therefore attached between the cell housing and the cell contact unit 6, in particular between the cell housing and the holders 18.
  • the rear base surfaces 30 of the holders rest on the adhesive tape.
  • Compression elements also called compression pads, are typically placed between two adjacent cells.
  • each holder 18 has exactly one cell connector 8.
  • a respective holder can also have, for example, several holding receptacles 26, wherein the holders are still arranged in a modular manner.
  • such (pair) holders have exactly two holding receptacles 26 or alternatively exactly three or exactly four holding receptacles 26.
  • Such (multiple) holders 18 with several holding receptacles 26 are formed, for example, by a series of the (single) holders 18 described in the exemplary embodiment, wherein a respective (multiple) holder 18 is designed as a monolithic, one-piece component, in particular as an injection-molded component.
  • the cover 32 forms a contact protection, in particular in accordance with protection class IPXXB according to ISO 20653.
  • the contact protection is explained in more detail below with reference to FIGS. 3 and 4.
  • the contact protection ensures that the cell connector 8 cannot be touched from the front 24 with a finger, more precisely with a test finger according to IEC 61032 ( Figure 2, test sample B).
  • the cover 32 is suitably designed: It first has mounting openings 52, which are L-shaped in the exemplary embodiment. An assembly tool can reach through these during assembly. In particular a welding tool for welding the cell connector 8 to the cell.
  • pole windows 54 are formed, which are preferably arranged between two opposite mounting openings 52. When the cell connector 8 is inserted, the pole windows 54 are aligned with its pole openings 50 (see FIG. 2). The pole windows 54 therefore enable optical control of the correct positioning relative to the cell poles.
  • fixing webs 56 are formed in the interior of the holding receptacle 26.
  • these each surround a mounting opening 52. They protrude into the interior of the holding receptacle 26 from a base formed by the cover 32, counter to the transverse direction Q, and form a counter bearing for the cell connector 8.
  • the cell connector 8 rests on these fixing webs 56 at least during assembly and preferably also in the assembled state, or alternatively has a tolerance distance in the assembled state.
  • the cell connector 8 is pressed against the cell poles during assembly using these fixing webs 56, so that a welded connection can be reliably formed.
  • the pressing force is typically exerted by a hold-down device that is supported on the front side 24 on the cover 32.
  • a welding electrode is typically guided through the hold-down device and is guided through the mounting opening 52 for welding.
  • the openings 52, 54 have a limited maximum opening width so that the relevant standards for contact protection are met.
  • the contact protection is designed in particular in accordance with ISO 20653. This defines a test probe, which is also referred to as a test finger.
  • the contact protection is now designed in such a way that contact with the cell connector is reliably avoided with such a test probe.
  • the test probe has a diameter of 12 mm, 8 mm, or 4 mm, depending on the penetration depth.
  • the maximum opening width is therefore less than 12 mm and preferably less than 8 mm.
  • the maximum opening width is understood in particular to mean that the respective opening 52, 54 has a maximum Circular area of less than 12 mm, preferably less than 8 mm (if necessary under further boundary conditions as laid down in the standards).
  • Sensors are generally provided for monitoring the battery.
  • the respective cell contact unit 6 is designed in particular for temperature measurement and voltage measurement. This means that the corresponding sensors are integrated directly into the cell contact unit 6.
  • the special measures for the sensors are explained in more detail in connection with FIGS. 5-8 and also in connection with FIGS. 3 and 4.
  • a respective holder 18 is designed by the plug receptacles 42 to accommodate parts of the sensor system, in particular contact plugs 58.
  • the plug receptacles 42 are formed in the longitudinal direction L on opposite sides of the holder 18 and thus adjacent to the holding receptacle 26.
  • the plug receptacles 42 are designed in particular in the manner of receiving channels, in particular continuous receiving channels.
  • a respective contact plug 58 can be plugged into these plug receptacles 42 on the front side 24, for example, in a plugging direction which in the exemplary embodiment is oriented opposite to the vertical direction V, as shown by arrows in FIG 3.
  • suitable openings 60 are formed in which parts of the sensors, for example a sensor, are located. A connection from the rear side 22 to the front side 24 is thus created via the openings 60.
  • the openings 60 are arranged adjacent to a respective plug receptacle 42.
  • the holders 18 have contact plugs 58 in the opposite plug receptacles 42. which can be seen in particular in FIG 7, in which the holder 18 is hidden.
  • the contact plug 58A shown on the left is used to connect a temperature sensor 62.
  • the contact plug 58B shown on the right is used to measure voltage and in the exemplary embodiment is connected to a bonding wire 64, which is preferably designed as a bare conductor throughout and which directly contacts the cell connector 8 and in particular its connection tab 48.
  • Each contact plug 58 has an internal contact element (not shown in detail here) which is designed in particular as a crimp contact. This typically has a crimp area to which a stripped conductor of the respective sensor line 14 is connected. At the opposite front end, the contact element has a front plug-in part, typically a contact pin or a contact socket.
  • a very small contact element is preferred, the length of which is preferably less than 20 mm and, for example, less than 15 mm and the width and height of which are preferably less than 4 mm and, in particular, less than 2 mm.
  • the crimp contact is, for example, a contact element known under the brand name "NanoMQS".
  • the contact element is surrounded by an insulating plug housing.
  • the front end of the contact element is freely accessible and not protected by the plug housing, particularly in the case of contact plug 58B.
  • a part of the contact element, particularly the front plug part is thus virtually exposed and no longer surrounded by the plug housing.
  • the voltage - preferably of each cell - is tapped via the bonding wire 64.
  • This bonding wire 64 is connected with both ends by direct bonding on the one hand to the cell connector 8 and on the other hand to the described contact element, namely in particular with its front plug-in part.
  • the bonding wire 64 is thus directly connected to the respective element in a material-locking manner, i.e. without any further intermediate elements.
  • the bonding wire 64 itself serves as a safety element and in particular as a fuse.
  • the safety properties of the bonding wire 64 are set in a suitable manner by its geometry and material properties.
  • the bonding wire 64 has a total length of only 10-30 mm and a diameter of, for example, 50 pm to 100 pm. It consists in particular of aluminum or an aluminum alloy, for example an aluminum-silicon alloy with a one percent silicon content. Overall, this sets a fuse rating of, for example, 750 mA to 1.5 A.
  • the advantage of securing via bonding wire 64 is that it requires extremely little installation space and eliminates the need for a separate fuse element, which usually requires a fuse carrier, such as a circuit board.
  • temperature sensors 62 are provided for temperature monitoring. These temperature sensors 62 are each in thermally conductive contact with the cell, in particular with the cell housing, for example on the front side. In the exemplary embodiment, some of the temperature sensors 62A are provided for a hot spot measurement and are preferably positioned directly adjacent to a respective cell pole 66 (see in particular FIG. 7). In addition, further temperature sensors 62B are provided for a so-called cold spot temperature measurement, which are each further away from the Cell pole 66 are arranged. In particular, such a further temperature sensor 62B is positioned in an edge region 28 of the holder 18, as will be explained in more detail below in connection with FIG. 8.
  • the structure of a respective temperature sensor 62 can be seen from a hot spot temperature sensor 62A in FIG 7.
  • the temperature sensor 62 has a suitable electronic component, in particular an NTC thermistor, as a sensor element. This is contacted on a circuit board, which is attached to the cell housing either directly or, in the exemplary embodiment, via a heat-conducting intermediate element (heat pad), for example by gluing.
  • Contact pins 68 are connected to the circuit board and to the sensor element, onto which the contact plug 58A is directly plugged in the assembled state.
  • the contact plug 58A is preferably designed identically to the previously described contact plug 58B (if necessary without a partially exposed contact element).
  • the contact element in the connector housing is again preferably a crimp contact.
  • the front plug-in area has contact sockets that are plugged onto the contact pins 68.
  • the contact pins 68 are bent out of the circuit board plane. They run in particular parallel to the circuit board plane and are accordingly bent at least in an L shape and, in the exemplary embodiment, in a U shape.
  • a vertically protruding stabilizing element 70 is arranged on the circuit board, which serves to mechanically stabilize the contact pins 68.
  • the stabilizing element 70 also serves, in particular, to absorb the insertion forces when plugging in the contact plug 58A.
  • FIG. 7 shows the typical design of the cell pole 66, which has an approximately cuboid-shaped base with a contact pin 72 protruding upwards in the middle, which, in the assembled state, lies in the pole opening 50 of the cell connector 8.
  • the further temperature sensor 62B is - as can be seen from FIG 8 - arranged in the area of one of the two assembly lines 20 and in particular in the area of the upper assembly line 20B.
  • this has a sensor opening 74 through which the temperature sensor 62B can pass from the rear 28 to the front.
  • the holder 18 also has an opening, particularly in the area of the guide 34, 34B, through which the temperature sensor 62B is inserted.
  • a positioning element 76 is formed, which is particularly designed as an edge web that protrudes upwards and runs around the opening. The holder 18 engages with this positioning element 76 in the sensor opening 74, so that the assembly line 20B is fixed in place and the temperature sensor 62B is protected.
  • FIG 8 also shows an edge-side holder 18'. Instead of a cell connector 8, this holds a cell connection (not shown in detail here), which is designed similarly to the cell connector 8 for electrically contacting a cell pole 66, but only for electrically contacting the outermost, edge-side cell pole 66 of the first or last cell in the module.
  • the edge-side holder 18' is designed approximately as half a normal holder 18.
  • the cell connection has a contact tab 44 with a pole opening 50 formed therein.
  • the cell connection at least its partial area lying in the edge-side holder 18', is designed in particular as a flat sheet metal.
  • the cell connection as a whole is preferably designed in particular as a bent sheet metal part which extends laterally out of the edge-side holder 18' and is connected to the connection terminal 10 or is part of the same.
  • the cell connection is electrically and mechanically connected to the cell pole 66.
  • the edge-side holder 18' also has assembly openings 52 and a pole window 54, in accordance with the normal holders 18. Furthermore, it has at least one plug receptacle 42, in which in particular a contact plug 58 B is arranged for tapping the cell voltage by means of the bonding wire 64. An identically constructed edge-side holder 18' is arranged at the opposite end of the cell contact unit.
  • a cell contact unit 6 with a modular sensor cable set 12 is shown. This is combined in particular with one or more of the aspects described above, in particular with the entire modular structure of the cell contact unit 6. In principle, however, this is also designed as an independent inventive concept which can be used independently of the aspects described above, especially in the case of generally modularly constructed cell contact units.
  • cell connectors 8 are initially combined to form a group 80.
  • the cell connectors 8 of a respective group 80 are held by a common holding frame 82. They therefore form a prefabricated modular unit with the holding frame 82.
  • the sensor cable set 12 has in particular a plurality of flat cables 84 arranged next to one another, each of which has a plurality of conductor strands 86.
  • a respective flat cable 84 is divided into sections 88 when viewed in the longitudinal direction, with each group 80 having a section 88 of a respective flat cable 84. This means that several sections adjoining one another in the longitudinal direction form a respective flat cable 84.
  • the flat cable 84 is in particular a flexible ribbon cable in which the individual conductor strands 86 are embedded in a common insulation sheath.
  • the flat cables 84 and thus also several sections 88 of the several flat cables 84 are arranged next to one another.
  • the flat cables 84 and thus the cable set 12 extend from a connection side (starting side) on the right half of the image to an end side in the direction of the left half of the image.
  • the first group 80 preferably has at least as many flat cables 82 and thus as many conductor strands 86 as are required for the electrical contacting of all the components of the cell contact unit 6 to be contacted.
  • the number of flat cables 84 arranged next to one another is successively reduced, so that the cable set 12 has a stepped design in the area of the cell connectors 8.
  • the conductor strands 86 are generally initially interrupted at the boundaries between the groups formed by the holding frames 82.
  • the holding frames 82 therefore simultaneously define separation points for a respective conductor strand 86 and thus also for the flat cable 82.
  • the conductor strands 86 are only subsequently electrically connected to one another via connectors 90 across the separation point during assembly.
  • a first type of connector 90A is designed to connect two conductor strands 86.
  • it has in particular two opposing crimp terminals, via which a respective conductor strand 86, more precisely two sections of the conductor strand 86 of the flat cable 82, are connected to one another.
  • the electrical contact is preferably made without removing the insulation.
  • a second type of connector 90B is designed to connect a respective conductor strand 86 to a respective cell connector 8 or also to a sensor, in particular temperature sensor 62.
  • This connector 90B has in particular a welding tab at one end, with which it is electrically connected to the cell connector 8 or to the sensor 62, for example by ultrasonic welding. The other end is preferably in turn designed as a crimp terminal for contacting a respective conductor strand 86.
  • This second type of connector 90B is preferably designed as an angled (in particular L-shaped) connector, so that one end, in particular the crimp terminal, extends in the longitudinal direction of the cable set 12 and the other end, in particular the welding tab, is oriented perpendicular to this.
  • the individual flat cables 84 at the beginning of the cable set 12 are connected via round cables 92 to a multi-pole plug 16, via which the entire sensor cable set 12 is connected, for example, to a battery management system.
  • the round cables 92 form connecting lines between the flat cables 84 and the plug 16.
  • a third type of connector 90C is provided for contacting these round cables 92 to a respective conductor strand 86, which is designed at one end to contact a respective conductor strand 86 and at its other end to contact a respective round cable 92. Both ends are preferably formed by suitably designed, different crimp terminals.
  • the individual groups 80 of the cell contact unit 6 are prefabricated and preferably provided with the sections 88 of the flat cables 84 at the same time.
  • the holding frame 82, the cell connectors 8, possibly sensors 62 and possibly several sections 88 of the possibly several flat cables 84 arranged next to one another therefore preferably form a prefabricated modular unit.
  • the individual conductor strands 86 are, for example, already electrically contacted with the cell connectors 8 and/or sensors 62 that this respective group 80 has.
  • these module units and thus several groups 80 are arranged in series.
  • the conductor strands 86 of sections 88 of adjacent groups 80 are then electrically connected via the connectors 90A, so that a respective conductor strand 86 is looped through several holding frames 82 and thus across the separation points.
  • the cell connectors 8 and/or sensors 62 can also be electrically connected via the connectors 90B, provided this has not already been done previously during the pre-configuration of the module units.
  • recesses 94 are provided in particular on the holding frame 82, which in Figure 9 are only shown by dashed lines. These are formed in particular on the edge areas of the holding frame 82 and there in particular on the underside. These recesses 94 are formed in such a way that in the area of the connectors 90A and especially in the area of their crimp terminals, they can be gripped by a crimping tool.
  • the temperature sensor 62 is held in a special holder 100.
  • This is a monolithic part of a holder 18, which, in contrast to the previous embodiments, forms a common holder 18 for a plurality of cell connectors 8. In particular, it forms a common holder 18 for all cell connectors 8 arranged next to one another in a row in the longitudinal direction L.
  • the holder 18 is in particular a plastic injection-molded part.
  • the holder 100 has two holding parts 102 that are opposite one another in the longitudinal direction L and are each connected to the rest of the holder 18 via a base part.
  • This base part is followed by a holding tab 104 that is cut freely and bent.
  • this has two parallel arches, in particular U-shaped arches, arranged next to one another. These are also made of the same plastic material and are part of the monolithic holder 18 of the holder 100.
  • arches are bent in the transverse direction (according to the present directional nomenclature), ie they are made of Plane of the cell connectors 8 (plane spanned by the longitudinal direction L and the vertical direction V) bent upwards.
  • Plane of the cell connectors 8 plane spanned by the longitudinal direction L and the vertical direction V
  • this arcuate shape of the retaining tabs 104 creates elasticity in the longitudinal direction L.
  • the retaining tabs 104 are therefore designed as spring tabs.
  • the temperature sensor 62 is accommodated in the holder 100.
  • this has a circuit board 106 with integrated sensor electronics. This is connected to a sensor line 14 via a contact plug 108 and to a battery management system, for example, via the cable set 12, as described above.
  • the circuit board 106 is clamped between the two opposing holding parts 102 against the elastic holding force of the respective holding part 102 or the respective holding tab 104.
  • a respective retaining tab 104 has retaining elements at the end, in particular for the form-fitting fixation of the circuit board 106.
  • a respective retaining tab 104 forms a lower support, in particular in the form of a strip-shaped element, which in the exemplary embodiment is approximately L-shaped, which in particular also has a stop against which the temperature sensor 62 and in particular the circuit board 106 preferably rests with their long side.
  • a respective retaining tab 104 forms a retaining element which is effective in the longitudinal direction L and which is designed in particular to overlap the circuit board 106.
  • the contact plug 108 is omitted and the circuit board 106 is shown transparently so that electronic components such as the conductor tracks can be seen.
  • a thermal contact element 110 is arranged, which in the thermal contact with the cell of the battery (not shown here).
  • this contact element 110 lies flat on the cell housing and is firmly connected to it, in particular in a material-locking manner, for example by gluing.
  • This contact element 110 is, for example, a metal plate, the temperature of which is detected, for example, by corresponding measuring electrodes of the temperature sensor 62.

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

Abstract

La présente invention concerne une unité de mise en contact d'éléments de batterie (6) destinée à une batterie à plusieurs éléments, des éléments voisins étant à l'état monté connectés électriquement les uns aux autres par des connecteurs d'éléments (8), et un jeu de câbles de détection (12) étant prévu, lequel présente au moins une ligne de détection (14) qui est connectée électriquement et de manière sécurisée contre les surintensités, à l'élément, pour permettre une mesure de la tension aux bornes de l'élément, la ligne de détection (14) étant connectée électriquement à un point de prise de tension par un fil de connexion (64) et une soudure.
EP24705057.8A 2023-02-07 2024-02-06 Unité de mise en contact d'éléments de batterie Pending EP4659303A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102023200964 2023-02-07
DE102023207126 2023-07-26
PCT/EP2024/052883 WO2024165544A1 (fr) 2023-02-07 2024-02-06 Unité de mise en contact d'éléments de batterie

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EP4659303A1 true EP4659303A1 (fr) 2025-12-10

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Application Number Title Priority Date Filing Date
EP24705057.8A Pending EP4659303A1 (fr) 2023-02-07 2024-02-06 Unité de mise en contact d'éléments de batterie

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EP (1) EP4659303A1 (fr)
WO (1) WO2024165544A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012213273B4 (de) * 2012-07-27 2021-08-05 Hydac Technology Gmbh Energiespeichervorrichtung
DE102014200197A1 (de) * 2014-01-09 2015-07-09 Robert Bosch Gmbh Batteriezelle mit erhöhter Sicherheit und Verfahren
EP3573127A1 (fr) * 2018-05-25 2019-11-27 E-Seven Systems Technology Management Ltd Dispositif pour cellules destinée à stocker de l'énergie électrique doté de l'élément de contact à ressort

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