EP4107809A1 - Module de batterie pour construction de système de batterie pour véhicule - Google Patents

Module de batterie pour construction de système de batterie pour véhicule

Info

Publication number
EP4107809A1
EP4107809A1 EP21707235.4A EP21707235A EP4107809A1 EP 4107809 A1 EP4107809 A1 EP 4107809A1 EP 21707235 A EP21707235 A EP 21707235A EP 4107809 A1 EP4107809 A1 EP 4107809A1
Authority
EP
European Patent Office
Prior art keywords
battery
address
module
battery module
connector
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
EP21707235.4A
Other languages
German (de)
English (en)
Inventor
Patrick ASSMANN
Björn Langhof
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.)
Webasto SE
Original Assignee
Webasto SE
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 Webasto SE filed Critical Webasto SE
Publication of EP4107809A1 publication Critical patent/EP4107809A1/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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 battery module for building a battery system for a vehicle, as well as a cable harness with several connectors for connecting several battery modules, and a battery system with at least one battery module and a cable harness, and a method for communication between a central control unit and at least one battery module.
  • high-voltage storage systems which are organized in battery modules, which are also known as battery packs or in battery packs, in any configuration in a series and / or parallel connection, e.g. 1sXp or 2sXp, are electrical interconnected to a battery system.
  • the battery modules are usually high-voltage storage devices with a voltage of 400V or 800V.
  • Each battery module in the battery system must be able to be uniquely assigned and recognized in order to implement and guarantee stable communication and functional execution.
  • This assignment is typically performed by a central and higher-level control unit, which can be integrated in one of the built-in battery modules or in a separate switch box, for example a so-called “vehicle interface box”.
  • the higher-level control unit then uses a master-slave principle to ensure that each battery module is uniquely recognized.
  • each battery module can be addressed using a wide variety of methods. In any case, each battery module must be assigned a unique identifier, in particular a unique address. There are two established addressing methods to solve this problem: Either the address is permanently programmed into the battery module at the beginning, or the addressing of the battery modules is regulated in a dynamic method.
  • a disadvantage of static battery module addressing is that the system can no longer be started in the event of a fault. The error must then be corrected manually in the battery system. This proves to be time-consuming at least when battery systems have already been delivered to the end user and integrated in the vehicle.
  • each battery module is repeatedly assigned a unique ID with each start process.
  • a disadvantage of such a dynamic solution is that each start process requires a certain amount of time for the secure assignment of addresses and identifiers. Usually, however, the end user wants to start the vehicle and use it immediately without any waiting times. In addition, the complexity of the software and the associated development and validation effort for the system are significantly increased. Furthermore, an analysis of the status of an individual battery module is made more difficult in the case of dynamic address assignment, since the address of the battery module can change over its lifetime.
  • previous concepts mostly only support a certain high-voltage topology. This means that previous concepts are very inflexible. In the event of changes to the high-voltage topology, the source code or the hardware of the central control unit must therefore always be adapted.
  • a battery module for setting up a battery system for a vehicle, the battery module having at least one battery cell and a battery management controller with a battery management controller interface, the Battery management controller interface has at least two address contacts for assigning an address to the battery module; and the battery management controller is designed and set up to recognize an assignment of the address contacts and to derive an address for the battery module therefrom.
  • a battery module is an interconnection of battery cells, the latter preferably storing electrical energy in the form of chemical energy.
  • a battery cell can be a lithium iron phosphate cell, for example.
  • the capacity and voltage of the battery module can be varied depending on the circuit.
  • different battery cells can be interconnected to form battery modules.
  • a battery module is understood here to be a sub-unit of a battery system, a plurality of battery cells being interconnected in a battery module. According to the understanding on which this is based, a battery module can also comprise a combination of several such subunits. In other contexts, such a combination is also referred to as a battery pack, but this also falls under the definition of a battery module.
  • a battery module usually comprises a battery management controller, which takes over the interconnection of the respective subunits as well as their monitoring and control, or at least one cell measuring device for measuring the status of the battery cell (s).
  • a battery module comprises at least one battery cell and a cell measuring device for measuring the state of the battery cell (s).
  • Several battery modules are combined to form a battery pack, the battery pack comprising a battery management controller which is set up to interconnect, control and monitor the battery modules in the battery pack.
  • Several battery packs are then combined to form a battery system that provides the vehicle with energy.
  • battery module In the definition used here, for the sake of simplicity, the hierarchy levels of the battery module and the battery pack are equated and referred to as “battery module”.
  • Various battery modules can then be interconnected to form a battery system.
  • These battery systems can then be used, for example, in vehicles, with the interconnections used, the number of battery modules and / or cells depending can be differentiated according to purpose.
  • the battery systems used in vehicles are in principle also suitable for stationary storage of energy.
  • a vehicle is any means of transportation that has an electric motor.
  • a car is a vehicle, but trucks, buses, aircraft equipment such as fixed-wing aircraft or rotary-wing aircraft, boats, submarines, electrically-assisted scooters and bicycles, electric bicycles in the form of pedalecs or golf caddies are also vehicles within the meaning of the claim.
  • a battery management controller monitors the status of the battery modules on which the battery is based, regulates the extraction of energy from the various battery modules and protects the battery modules against, for example, deep discharge.
  • a battery management controller can be associated with the entire battery system, or with the individual battery modules or with the individual cells or combinations thereof.
  • the battery management controller can have a battery management controller interface which has at least two address contacts.
  • the battery management controller recognizes an assignment of the address contacts and can, for example, assign an address to the battery module.
  • each battery module can be assigned a unique address by assigning the respective address contacts.
  • the battery management controller also assigns itself an address in the overall network based on the address contact assignment, so that the controller itself can also be addressed via the address on the battery management controller interface.
  • a controller in particular a battery management controller, is a control unit.
  • a controller can be software that is imported into existing hardware, but it can also be a hardware component that is connected to an existing hardware component. However, it can also be a hardware component which is taken into account in parallel in the circuit layout during the production of an already known hardware component. However, it can also be a hardware component which, together with an already known hardware component is integrated. In particular, it can be the case that the hardware component only assumes its function through the software.
  • a battery module can also mean that the hardware and / or software has at least partially a modular structure.
  • a modular structure can also mean that the overall system can also function without the battery module, but then does not have the desired improvements.
  • a modular structure can also mean that the battery module can be attached to existing systems.
  • a modular structure can also mean that different systems and devices, in particular battery systems, circuit units and control systems and control software, can be equipped with the module and then have a common basic configuration on the basis of which data and information can be exchanged.
  • the controller has an interface.
  • An interface is a connection unit that allows information to be transmitted to the controller, which can then be processed in the controller.
  • the interface has at least two address contacts.
  • An address contact is, for example, a conductive connection of the interface at which the controller can take measurements of one or more physical quantities.
  • Physical variables are, for example, the resistance, the conductivity and / or the electrical potential of the address contact.
  • the at least two address contacts can be used to assign an address to the battery module.
  • An address is a combination of specific and defined physical quantities.
  • An address is also unique in the communication area of the controller, i.e. the system, so that a module can be clearly identified.
  • the address can be assigned to the module in the controller.
  • the controller can, for example, transfer data, information and control commands that are sent to the address to the module.
  • the controller can also send data from the module, provided that it is requested or requested by the respective module address.
  • the number A of address contacts must be adapted. If only one physical variable, for example the voltage, is to be measured at all address contacts, and this only in two States are present, for example high voltage or no voltage, or negative voltage and positive voltage, then you always need at least Log2 (M)
  • the controller can read or measure the assignment of the address contacts of the interface. For example, the combination of physical measured variables that are present at the interface is associated with the module.
  • An assignment of two address contacts can consist, for example, in that a high electrical voltage is applied to the first address contact, while no electrical voltage is applied to the second address contact.
  • the module can be configured overall, for example, in such a way that it has a controller, the hardware of which has two contact surfaces to which a voltage can be applied.
  • the controller software recognizes these voltages and assigns the module an address that is associated with the combination of voltages on the contact surfaces.
  • the address contacts can each be contacted by an addressing pin with a connector and applied to electrical potentials.
  • a connector is a device for connecting a cable harness to the battery management controller interface.
  • a connector can have means that enable the connector to be locked in the connector counterpart, for example the battery management controller interface.
  • a connector can, for example, also be standardized to a specific external geometry and can contain connecting elements via which data and information can be transmitted from the cable harness.
  • a connector can be designed, for example, in the form of a plug or a socket in order to be able to establish a plug connection in this way.
  • Such connecting elements can be so-called addressing pins. Addressing pins can be conductive elevations or depressions that are attached in or on the connector. One side of the addressing pins can each be connected to one of the cables of the cable harness. The other side of the addressing pins can then transport the data and information from the cable harness towards the battery management controller interface.
  • the data and information can in particular be transported and generated via electrical potentials, as described above.
  • the address contacts of the battery management controller interface can by default also be at a first potential and brought to a second potential through a contact with the addressing pin.
  • the connector can in particular ensure a secure hold of the addressing pins on or on the address contacts.
  • the use of electrical potentials enables simple, safe and direct communication with the electronics of the battery management controller.
  • the connector can in particular be a CAN connector, the first potential being the ground of the CAN connector and the addressing pins being the freely selectable pins of the CAN connector.
  • CAN is the abbreviation for Controlled Area Network, which is a serial bus system and is used especially in vehicles for communication between different participants.
  • the first potential of the connector can be connected to the ground of the CAN connector.
  • the second potential can be applied via the freely selectable or assignable pins of the CAN connector to the battery management controller interface.
  • a CAN connector By using a CAN connector, in particular, compatibility of the battery management controller communication with other components can be ensured. Furthermore, it allows the use of established hardware, as well as established methods and protocols, in particular communication protocols that are typical and / or standardized in motor vehicles.
  • the electrical connection between an addressing pin and a first potential can be interpreted by the battery management controller as a logical 0, and an electrical connection between an addressing pin and another second potential can be interpreted as a logical 1 by the battery management controller.
  • the respective addressing pin can simply remain unconnected, so that the battery management controller can distinguish between a defined (first) potential and an undefined potential for the unconnected addressing pins and interprets them accordingly as a logical 0 and a logical 1 .
  • the first potential can be at ground (GND), while the second potential is 5 volts. If, for example, the potentials GND, 5V, 5V, GND, GND are applied to a connector with 5 addressing pins, these potentials are transferred to the battery management controller interface, where they are interpreted as "01100" by the battery management controller.
  • the combination of the electrical connections of the addressing pins can be interpreted as an address by the battery management controller.
  • a control command can be sent to address “01100” so that only the battery module with the above address reacts to the control command.
  • the topology of the battery module and / or the battery system in particular the role of the battery module in the topology of the battery system, can be coded in the address of the battery module.
  • the topology of an electrical system provides information about the interconnection of the electronic components.
  • the topology of the battery module contains information about the Interconnection of the battery cells.
  • the topology of the battery system contains information about the interconnection of the battery modules.
  • the role of a battery module in the topology can include information about the interconnection of the battery module, its position in the overall system, the voltage and other properties.
  • the address “1011” can be assigned to a battery.
  • the first bit of the address could, for example, indicate that the battery module is connected in series with another battery module.
  • the numerical number could stand for an identification number of the battery module, which prefers a certain degree of degradation of the battery module in the overall system during the production process.
  • the last bit indicates whether the battery module is located on the right-hand side of the overall system or on the right-hand side of the overall system relative to a predefined orientation variable.
  • the first bit can mean whether the battery module is connected in series with another battery module. If the first bits of these two series-connected battery modules differ, the system can output an error message.
  • the module is the battery management controller or the battery management controller is connected to the module or the module is integrated in the battery management controller.
  • existing battery management controllers can also be retrofitted with a module so that the module assigns an address to the existing battery modules.
  • a module for setting up a battery system for a vehicle is also proposed, in particular a control module, the module having a controller and an interface, wherein the interface has at least two address contacts for assigning an address to the module and a controller, the controller being designed and set up to recognize an occupancy of the at least two address contacts and to derive an address for the module therefrom.
  • a cable harness with several connectors is provided for connecting several battery modules, the connectors occupying the address contacts of the battery modules differently.
  • a cable harness is a multi-part and electrically conductive connection with several connections and branches.
  • a cable harness can in particular improve the cable organization when interconnecting several components.
  • several devices can communicate with one another via these lines via a cable harness.
  • This connector can be, for example, a CAN connector or another connector.
  • the contacts of the connector can be connected by the cables of the cable harness.
  • several connectors can be connected via these disk cables and can be in contact with one another.
  • a different assignment of the address contacts of the battery modules can lead to a unique and unique address and enable the identification of the battery modules in the overall system.
  • the different assignment can be achieved by using the combination of the electrical connections from the connector to the address contacts in the system only once.
  • a first battery module can be connected to a connector in which the first addressing pin is on ground (0) and the second addressing pin is on 5V (1) and so the battery module is assigned the address "01" and A second battery module can be connected to a connector where the first addressing pin is at 5V and the second addressing pin is at ground and the battery module is assigned the address "10". Then the address contacts of each battery module are assigned differently. This enables the various battery modules to be clearly identified and addressed.
  • the cable harness can have a modular, in particular expandable, structure.
  • Modular construction means that the entire cable harness can be put together from sections. Each section has at least one input to which a section can be adapted, as well as at least two outputs to which further cable harness sections can be connected. If further wiring harness sections are connected to a wiring harness section, it will expand.
  • a modular structure has the particular advantage that only one model of a cable harness section has to be produced, and this one section can be assembled to form an entire cable harness.
  • the length of the cable harness and the number of connectors can be freely selected, so that only as many cable harness sections have to be installed as connectors are required.
  • the cable harness can partially place the addressing pins of the connectors on the same electrical potential, in particular the same ground.
  • the connectors can access a common ground line so that all modules or battery management controllers are connected to the same ground. This can reliably prevent electrical flashovers and also forms a common basis for communication between the various battery management controllers.
  • the cable harness can be integrated into the high-voltage cable harness and / or formed parallel to it and / or linked to it.
  • the various battery modules are interconnected to form a total battery with a total voltage and total capacity.
  • two 400V battery modules can be connected in series to form an 800V battery.
  • the wiring harness for communication between the battery modules can be configured parallel to the high-voltage wiring harness, so that with a given high-voltage topology the wiring harness and the high-voltage wiring harness are assembled and mix-ups between the high-voltage topology and the communication connections are avoided.
  • the cable harness can be laid parallel to the high-voltage cable harness, for example using cable ties, so that each connector for the battery management controller interface and the connectors for the high-voltage topology have a spatially adequate relationship ensures that both the correct connector and the correct battery connector are assigned to each battery module.
  • the high-voltage topology is defined within the overall battery system via the high-voltage wiring harness.
  • the cable harness for communication between the battery modules can therefore also be integrated into the high-voltage cable harness so that the communication lines and the power lines are parallel to one another. This can avoid mix-ups.
  • By using an integrated cable harness in the high-voltage cable harness it can be ensured that the high-voltage topology is consistent with the address assignment to the battery modules. This avoids incorrect configurations.
  • a battery system with at least one battery module and a cable harness is also provided, the battery modules being brought together with the cable harness in a central control unit.
  • a battery system is the interconnection of several battery modules. This interconnection takes place, for example, with a cable harness. Connectors can be connected to the wiring harness, which in turn occupy the address contacts of the battery modules. In this way, addresses can be assigned to the contacted battery modules by the respective battery management controllers.
  • the different packs can be connected to a central control unit.
  • This central control unit can, for example, recognize which battery addresses are assigned in the battery system.
  • the central control unit can also regulate the communication between the battery modules or communicate with the individual battery modules.
  • the central control unit can also assign specific roles in the overall topology to the battery modules via a master / slave system.
  • the central control unit can assign the various addresses of the battery modules of the battery system to an overall topology.
  • the overall topology reflects the entire interconnection of the battery modules with a total capacity and a total voltage.
  • the central control unit can use the addresses to recognize whether battery modules are connected in series. For example, it can be stored in the central control unit that batteries are connected in series when the first address bit is 1.
  • the central control unit can recognize battery modules connected in series. For example, a battery module with the address “1011” can be connected in series with the battery module with the address “0011”. Based on this assignment, the central control unit can manage the battery modules with the addresses “1011” and “0011” as a unit.
  • the central control unit can be designed in a battery module or independently and / or the central control unit can be formed by the module.
  • the battery system when a battery module is installed in the battery system, the battery system, in particular the connector, can assign the address to the battery module according to the assignment of the addressing contacts of the connector and, in particular, when changing or replacing a battery module, assign the same address to the new battery module.
  • the communication of the battery module can be started via the address of the old battery module in the event of a change.
  • the central control unit can communicate with the battery module via the assigned address and / or transmit the assigned address when communicating with the battery module and / or identify the battery module by means of the assigned address.
  • the central control unit can request the addresses of the connected battery modules via a global command via the CAN bus.
  • the responses from the individual battery modules can then be processed in the central control unit and, for example, registered.
  • the battery module voltages can then be queried at regular intervals from the various addresses.
  • the battery modules can also send their address when communicating with the control unit, so that an assignment in the central control unit is possible.
  • FIG. 1 shows a schematic representation of a battery module
  • FIG. 2 shows a tabular representation of various address contact assignments
  • FIG. 3 shows a schematic structure of a battery system
  • FIG. 4 shows a schematic structure of a 2s4p battery system
  • FIG. 5 shows a schematic representation of a plausibility analysis
  • FIG. 6 possible connectors
  • FIG. 7 shows a schematic representation of the mode of operation of a connector
  • FIG. 8 shows a schematic representation of the communication between a battery module and a central control unit
  • FIG. 9 shows a schematic representation of a modular cable harness.
  • a battery module 1 is shown schematically in FIG.
  • the battery module 1 comprises a battery cell 16, a battery management controller BMC, and a battery management controller interface BMCS.
  • the battery management controller interface BMCS has four address contacts 12.
  • the battery management controller also has a microcontroller pC in which data and information can be processed.
  • the address contacts 12 are connected to the addressing pins 14 of a connector 10 (not shown here). By occupying the addressing pins 14, three address contacts 12 are connected to ground. An address contact 12 remains unoccupied. The unused address contact is interpreted by the microcontroller pC as "1", the address contacts 12, which are connected to ground, are interpreted as "0". The battery management controller thus assigns the address "1000" to the battery module.
  • FIG. 2 the various possible assignments of the address contacts 12 of a battery module 1 with four address contacts 12 are shown in a table.
  • This table can be stored, for example, in a memory of the battery management controller BMC and used as a so-called look-up table.
  • the battery management controller BMC assigns the battery module 1 the appropriate address to recognize its role in the overall system.
  • the address contacts 12 are numbered in descending order in the table and start with address contact no. 4 ADR4 up to address contact no. 1 ADR1.
  • the “ECU type” column shows the type of electronic control unit (ECU). For example, in addition to battery management systems BMS, so-called “vehicle interface boxes” VIB, such as a central control unit ZS, are also provided.
  • the role of battery module 1 is specified in the "ECU sub type” column. If the battery module 1 is connected to an “1111” connector 10, it is a single battery module 1 with its own control (“standalone”). If a battery management controller BMC is connected to the connector (“plug”) “0000”, it recognizes that it takes on the role of a central control unit ZS (“VIC”) and controls a 400V battery system, for example.
  • VOC central control unit ZS
  • the battery system 3 can be specified, for example, in that the battery modules 1 are simply connected in series and x-times in parallel (1sXp). If the battery management controller BMC is connected to a "1000" connector 10, it recognizes, for example, that it is controlling an 800V battery system 3, whereby two battery modules 1 are connected in series and these two battery modules 1 are connected in parallel with other x battery module pairs ( 2sXp).
  • the battery management controller BMC If the battery management controller BMC is connected, for example, to an “0110” connector 10, it recognizes its role as a “slave” and is therefore subordinate to another control unit.
  • Various identifiers can also be associated with the address, which are listed in the "Pack ID” column. For example, central control units ZS and standalone battery modules can be assigned Pack ID 0. #
  • the "Pack Name” column indicates the name of the respective battery module.
  • the first digit in the "Pack Name” indicates the position within a serial battery system structure, the second number indicates the position within a battery system structure connected in parallel.
  • the pack addressing through the connector configuration facilitates variant management between different battery system solutions. Since different customers with different desired high-voltage topologies are to be served with a central control unit ZS, this solution does not have to make a distinction in production for the use of the central control unit ZS. That makes the logistical effort easier.
  • the arrangement of battery modules 1 in a battery system 3 is shown schematically in FIG.
  • the serial index ie the first digit of the “pack name”
  • the parallel index i.e. the second digit of the “pack name”
  • Various battery cells are arranged in the xy plane.
  • the polarity is marked with +/- in the respective battery cells.
  • the assigned address is in the first row of the identifier, the second row shows the pack name.
  • the third line shows the respective ID. All identifiers were taken from the table in FIG. It can be clearly seen that battery modules 1 with the same parallel index are placed next to one another, while battery modules 1 with the same serial index are arranged one above the other.
  • FIG. 4 shows the schematic structure of a 2s4p battery system 3.
  • Two of the battery modules 1 with the IDs 0 to 3 and 7 to 10 are connected to one another in series via the HV wiring harness 22 so that the voltage of both battery modules 1 adds up.
  • a total of four serially connected battery module pairs are again connected in parallel so that the capacity of all battery module pairs adds up.
  • the battery modules are additionally connected to a VIB via a cable harness 20 with connectors (not shown).
  • the VIB has been assigned the address "1000" via the connector so that the VIB takes on the role of the central control unit ZS of the 800 V system with 2s4p topology.
  • FIG. 5 shows a possible plausibility analysis that can protect against incorrect operation of the battery system 3. In particular, communication errors that occur and misuse of the battery system due to the impermissible interconnection of battery modules are detected and checked for plausibility.
  • FIG. 5A the battery modules 1 are correctly interconnected, since the parallel indices of the battery modules 1 match.
  • the central control unit ZS has been assigned an address “0000” which controls a battery system 3 in which the battery modules are not connected in series. This discrepancy between the information from the central control unit ZS and the information about the topology of the battery cells can lead to an error message which indicates the lack of interconnection and thus protects the battery cells from damage.
  • the central control unit ZS has been assigned the correct address for a serial connection of the two battery modules 1. However, the parallel indices of the two linked battery modules 1 do not match. This can be interpreted by the central control unit ZS as a possibly faulty circuit, so that an error message is output. Overall, the system can check whether the specified topology of the central control unit ZS matches the information from the battery modules 1.
  • the connector 10 in FIG. 6A is a CAN connector 100 which has five addressing pins 14.
  • the addressing pins 14 are characterized in the figure that they are filled with either black or white. Hatched pins represent communication pins that are not required for pure addressing and that ensure the functionality of the CAN communication. Since various pins are used as standard for communication via the CAN bus, the freely selectable pins of the CAN connector must be selected for correct addressing. It is assumed here that pins 2, 4, 5 as well as 8 and 9 can be freely assigned for CAN communication. Pin no. 3 is connected to ground as standard. For example, the addressing pins 14 can also be connected to ground via the CAN ground, provided the connector is set up accordingly. The addressing pins 14 connected to ground are then registered by the address contact 12 and interpreted as “0” by the battery management controller. The address contacts 14 ‘are not connected to ground and are therefore interpreted as" 1 ".
  • FIG. 6B A standard CAN connector 100 and an address connector 102 are shown in FIG. 6B.
  • the address connector 102 is connected to the CAN connector 100 via an electrical line.
  • the addressing pins 14 of the address connector 102 can thus use the ground of the CAN connector 100.
  • a combined connector 104 with 15 pins can be seen in FIG. 6C, of which pins 6 to 8 as well as 14 and 15 are addressing pins 14. In the connector of FIG. 6C there are in particular communication pins and addressing pins 14 and 14 '.
  • the mode of operation of a connector 10 is shown schematically in FIG.
  • the address contacts 14 of the battery management controller interface are assigned via the connector 10.
  • the address contacts 14 labeled ADR2 and ADR3 are connected to the ground of the central control unit ZS via the connector.
  • the address contacts with the labels ADR1 and ADR4 remain unoccupied.
  • the unused address contacts 14 are interpreted as "1" by the battery management controller.
  • the occupied address contacts 14 are interpreted as "0" by the battery management controller.
  • 1001 is the address for battery module 1.
  • the central control unit ZS and the battery module 1 can exchange data and information via the transmission and reception lines (TX and RX) of the cable harness 20.
  • the central control unit ZS can communicate with the specific battery module 1 by using the registered address of the battery module 1 in the communication.
  • the battery module 1 can then also send its address in its response, so that the response can be assigned to the corresponding battery module 1.
  • FIG 8 the communication scheme between battery module 3 and a central control unit ZS is illustrated. Shown is a 2s2p battery system 3 with a total of four battery modules 1.
  • the central control unit ZS sends a control command, for example "1000: 1010: V?" To the entire battery system 3.
  • the command structure can, for example, look like the first communication block contains the sender address, here "1000". In this way, the recipient can check the admissibility of a subsequent request using the system hierarchy.
  • the second communication block contains the recipient address, here "1010".
  • the receiver block is read by all battery modules 1 of the battery system 3.
  • the third block can contain the specific request, here "Status".
  • Each harness section 202 has at least one input and two outputs. This allows the various wiring harness sections 202 to be connected to one another.
  • the wiring harness also allows the various addressing pins of the connectors 10 to be connected to the same ground, provided that the ground contact is looped through the wiring harness.
  • a cable harness can easily be expanded by attaching new cable harness sections.
  • all the individual features that are shown in the exemplary embodiments can be combined with one another and / or exchanged without departing from the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un module de batterie (1) pour construire un système de batterie pour un véhicule, le module de batterie ayant au moins un élément de batterie et un controleur de gestion de batterie (BMC) comprenant une interface de contrôleur de gestion de batterie (BMCS), l'interface de contrôleur de gestion de batterie (BMCS) comprenant au moins deux contacts d'adresse pour attribuer une adresse au module de batterie, et le controleur de gestion de batterie (BMC) est conçu et configuré pour identifier une adresse attribuée au contact d'adresse et à partir de celui-ci, pour dériver une adresse pour le module de batterie.
EP21707235.4A 2020-02-19 2021-02-19 Module de batterie pour construction de système de batterie pour véhicule Pending EP4107809A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020104375.9A DE102020104375A1 (de) 2020-02-19 2020-02-19 Batteriemodul zum Aufbau eines Batteriesystems für ein Fahrzeug
PCT/EP2021/054196 WO2021165490A1 (fr) 2020-02-19 2021-02-19 Module de batterie pour construction de système de batterie pour véhicule

Publications (1)

Publication Number Publication Date
EP4107809A1 true EP4107809A1 (fr) 2022-12-28

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US (1) US20230070899A1 (fr)
EP (1) EP4107809A1 (fr)
CN (1) CN115152072A (fr)
DE (1) DE102020104375A1 (fr)
WO (1) WO2021165490A1 (fr)

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DE102022202455B4 (de) * 2022-03-11 2023-10-12 Vitesco Technologies GmbH Gerät mit einer Kommunikationseinrichtung zur Datenübertragung über einen Datenübertragungsbus, sowie Datenübertragungssystem mit derartigen Geräten
CN115955461B (zh) * 2023-03-15 2023-05-26 深圳市锐深科技有限公司 船舶电池包从机地址配置方法、装置、配置机及电池包从机

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DE102010033545A1 (de) 2010-08-05 2012-02-09 Valeo Schalter Und Sensoren Gmbh Kontaktierungsvorrichtung mit Schneidklemmen zur Adresskodierung
DE102015204301A1 (de) * 2015-03-11 2016-09-15 Volkswagen Aktiengesellschaft Testaufbau und Emulationseinheit für einen Zellmanagementcontroller eines Batteriemoduls zur Verwendung in einem Testaufbau zum Testen eines Batteriemanagementcontrollers
DE102015224485A1 (de) 2015-12-08 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Verfahren und System zur Überwachung von mehreren Zellen eines Kraftfahrzeugs

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CN115152072A (zh) 2022-10-04
DE102020104375A1 (de) 2021-08-19
WO2021165490A1 (fr) 2021-08-26
US20230070899A1 (en) 2023-03-09

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