WO2019105839A1

WO2019105839A1 - Connecting device and battery system

Info

Publication number: WO2019105839A1
Application number: PCT/EP2018/082213
Authority: WO
Inventors: Tobias Mayer; Sebastian Stoll; Christian Behlen; Dominic HEIN
Original assignee: Lion Smart Gmbh
Priority date: 2017-11-28
Filing date: 2018-11-22
Publication date: 2019-06-06
Also published as: DE102017221312B3

Abstract

The present invention relates to a connecting device (1) for the data-communicating connection of a data communication (2) of a battery management system (101) in the form of a data stream (70) in a first battery stack (102) and a second battery stack (103), wherein the first battery stack (102) and the second battery stack (103) each have at least one temperature-control fluid line (50) and the temperature-control fluid lines (50) are each used, at least in sections, to transmit the data stream (70), and wherein furthermore the transmission of the data stream (70) ends at a communication end (51) of the temperature-control fluid line (50) in the first battery stack (102) and begins at a communication start (52) of the temperature-control fluid line (50) in the second battery stack (103). The present invention further relates to a battery system (100) comprising at least one first battery stack (102), one second battery stack (103) and one battery management system (101), wherein the first battery stack (102) and the second battery stack (103) each have at least one temperature-control fluid line (50) and the temperature-control fluid lines (50) of the battery stacks (102, 103) are each used, at least in sections, to transmit a data communication (2) in the form of a data stream (70) of the battery management system (101).

Description

Connecting device and battery system

Description

The invention relates to a connection device for data-communicating connection of a data communication of a battery management system in the form of a data stream in a first battery stack and a second battery stack, the first battery stack and the second battery stack each having at least one Temperierfluidleitung and at least partially the Temperierfluidleitungen for transmitting the

Data stream are used, and further wherein the transmission of the data stream in the first battery stack ends in a communication end of the Temperierfluidleitung and begins in the second battery stack in a communication start of Temperierfluidleitung. Furthermore, the invention relates to a battery system having at least a first battery stack, a second battery pack and a battery management system, wherein the first

Battery pack and the second battery stack each have at least one Temperierfluidleitung and in each case the Temperierfluidleitungen the battery pack at least

are used in sections for transmitting a data communication in the form of a data stream of the battery management system.

Battery systems as electrical energy storage devices are widely used in modern technology, for example in electric vehicles. Possible embodiments of such energy storage are, for example, lithium-ion batteries. In order to increase the performance of such battery systems, it is also known, for example, to combine a plurality of individual battery cells as battery units in a module housing to form a battery module and electrically connect them in parallel. A further increase in the electrical performance of such battery systems can be achieved by stacking two or more of these battery modules to form a stack of batteries in a stacking direction, wherein the individual battery modules can preferably be electrically connected in series. Moreover, it is also possible to interconnect a plurality of these battery stacks also electrically in parallel and / or in series in order to provide maximum electrical performance of a battery system can.

In order to be able to provide monitoring, control, regulation and / or control of the individual units of the battery system, in particular a plurality of battery packs and the battery modules arranged therein, it is also known to provide a Provide battery management system as part of the battery system. In order to be able to carry out the tasks relating to monitoring, control, regulation and / or control, it is necessary to establish a connection between the battery management system and the units of the battery system to be monitored or monitored

Data communication, in particular in the form of a data stream to provide. in the

Data stream, for example, state data of the individual battery units may be included, which for the higher-level monitoring by the data communication

Battery management system, for example, a control unit of the

Battery management system to be supplied. In the reverse data direction, control and / or regulation commands of the battery management system can be transmitted to the individual battery units of the battery system via the data communication or the data stream of the data communication. Advantageously, it has been found, a Temperierfluidleitung the battery pack, via a temperature control of the

Battery stack can be provided to use for a transmission of the data stream of the data communication. Compared to a wired data communication, this brings, for example, the advantages that on the one hand can not affect the data communication by radiating electrical interference in the cable-based data communication and at the same time even the data communication in the Temperierfluidleitungen no source of possible electrical disturbances of the operation of the entire battery system represent.

In particular, in battery systems that have multiple battery packs, it is necessary to integrate all the battery packs used in the data communication of

To integrate the battery management system. In particular, in battery systems which have a plurality of battery stacks, for example 20, 50 or even more battery stacks, this can be a not inconsiderable expense in the planning,

Design and / or manufacture of the battery system represent. Also for the

Provision of the data communication necessary space is to be considered.

It is therefore an object of the present invention to at least partially overcome the disadvantages described above. In particular, it is an object of the present invention to provide a connection device and a battery system in a cost-effective and simple manner, by which a data communication of a battery management system in Form of a data stream with at least two battery stacks can be simplified or provided, in particular a particularly compact and in terms of

Data communication simple transmission of the data stream of the data communication can be provided.

The above object is achieved by a connecting device for

data communicating connection with the features of independent claim 1 and by a battery system with the features of independent claim 13. Further features and details of the invention will become apparent from the dependent claims, the description and the drawings. There are features and details that are in the

Are described in connection with the connecting device according to the invention, of course, also in connection with the battery system according to the invention and in each case vice versa, so that with respect to the disclosures to the individual

Invention aspects is always mutually referenced or can be.

According to a first aspect of the invention, the object is achieved by a

A connection device for data-communicating connection of a data communication of a battery management system in the form of a data stream in a first

Battery stack and a second battery stack, wherein the first battery stack and the second battery stack each have at least one Temperierfluidleitung and each Temperierfluidleitungen are at least partially used for transmitting the data stream, and further wherein the transmission of the data stream in the first battery stack ends in a communication end of the Temperierfluidleitung and in second battery stack begins in a communication beginning of Temperierfluidleitung. A connecting device according to the invention is characterized in that the connecting device has an input interface, which can be arranged at the communication end of the tempering fluid line of the first battery stack, for receiving the data stream from the communication end, and the connecting device also has a communication start

Temperierfluidleitung of the second battery stack can be arranged operable output interface for outputting the data stream to the beginning communication, and further the

Connecting device comprises a transmission element, wherein the transmission element with the input interface and the output interface data-communicating connected to transmit the data stream from the input interface to

Output interface.

A connection device according to the invention is intended for use in a battery system which has at least two battery stacks. In battery systems, which have several, in particular more than two, battery stacks, two of these can each

Battery pack also be connected via a data connection device according to the invention in pairs. The individual battery packs have in particular Temperierfluidleitungen, whereby the individual battery stacks a Temperierfluid for controlled control of a temperature of the battery pack can be supplied. Cooling or heating of the respective battery stack by the tempering fluid can thereby be made possible. In addition, in both battery stacks the

Temperierfluidleitungen each at least partially for transmitting the

Data stream of a data communication with a battery management system of the

Battery system used. All of the above-described advantages of transmitting a data stream of data communication via tempering fluid lines, in particular in comparison to a cable-supported transmission of a data stream, can thus be provided in a battery stack according to the present type. As essential

The starting point for a connection device according to the invention is provided in the two battery stacks that in both a data communication in the form of a data stream in the Temperierfluidleitungen is transmitted, the data communication ends at a communication end of Temperierfluidleitung the first battery pack and the data communication in the second battery stack at a communication start the Temperierfluidleitung of the second battery stack begins. In other words, the communication end and the communication start represent a possible location in the interior and / or at the edge of the respective Temperierfluidleitung at which the

Data communication can be received and / or sent. The

Communication end and / or the beginning of the communication can be preferably arranged in a fluid-filled space of the respective Temperierfluidleitung. In particular, the communication end and / or the beginning of the communication may also be different and preferably also remote from a line end or a

Be formed line beginning of the respective Temperierfluidleitung. By a connecting device according to the invention can now be a

data-communicating linking these data communications in the two

Battery stacks of the battery system are provided. For this purpose, a connecting device according to the invention has in particular an input interface which can be arranged at the communication end of the tempering fluid line of the first battery stack. This arranging the input interface at the communication end of

Temperierfluidleitung the first battery stack may particularly preferably be a data-communicating arranging, so that the data stream of the data communication of the first battery stack can get into the connection device via the input interface. In particular, the connection device according to the invention also has a transmission element that also communicates with the input interface

is connected in a data-communicating manner. As a result, the data stream of the data communication which is now present at the input interface can also enter the transmission element and be transmitted there. At the other end of the transmission element this is again data-communicating with an output interface of

Connected connection device. The data stream of the data communication can in turn be transferred from the transmission element to the output interface in this way. In addition, this output interface can be arranged, in particular, at the start of the communication of the tempering fluid line of the second battery stack

datacommunicating can be arranged. Passing the data stream of the

Data communication from the output interface to the beginning of communication of the tempering fluid line of the second battery stack can be made possible.

In summary, therefore, in other words by an inventive

Connection device can be provided that a data stream transmitted in the Temperierfluidleitung the first battery stack of a data communication over the

Input interface is received by the connecting device is further transported by the transmission element inside the connecting device according to the invention and transferred to the output interface, wherein the output interface further passing the data stream of the data communication to the Temperierfluidleitung the second battery stack can be provided. A secure data transport between the Temperierfluidleitung the first battery pack and the Temperierfluidleitung the second battery stack can be provided in this way become. In particular, it can be provided by a connection device according to the invention that a continuous data communication of the

Battery management system can be provided by both battery packs. Separate data communication of the battery management system with each individual battery stack can be avoided in this way. A particularly simple and, in particular, cost-effective embodiment of a data communication of the

Battery management system with all battery stacks of the battery system can be made possible in this way, in particular by the presence of a corresponding number of connecting devices according to the invention, wherein in particular additionally by avoiding separate data communications of the

Battery management system with all battery stacks the required space for the battery management system can be reduced.

In a connection device according to the invention, it is particularly preferable for the transmission of the data stream in the tempering fluid lines to be based on acoustic signals, in particular ultrasound signals, and / or light signals, in particular infrared signals, the input interface for recording and the output interface for outputting acoustic signals and / or or light signals are formed. Acoustic signals and light signals represent preferred types of signals that can be transmitted in Temperierfluidleitungen of battery stacks. In particular, acoustic signals can be transmitted by pressure or density fluctuations of the tempering fluid itself. For a particularly good transmission of light signals, such as laser pulses, the Temperierfluidleitungen

be formed such that a wall of the respective Temperierfluidleitung can provide a total reflection of the light signals. A particularly good and in particular low-loss transmission of the data stream of the data communication can be provided in this way. Due to the configuration that both the input interface and the output interface for processing such acoustic signals and / or light signals are formed, a connecting device according to the invention for this type of signals can be used.

In addition, a connection device according to the invention can be designed such that the input interface is a receiver element for generating electrical signals from the data stream transmitted in the temperature control fluid line of the first battery stack and received at the communication end, that the transmission element has a line element for transmitting the electrical signals from the input interface to the output interface, and that further

Output interface has a transmitter element for generating a transferable in the Temperierfluidleitung data stream for outputting the data stream to the beginning of communication. In this first embodiment possibility of an inventive

Connection device is in particular an electrical or electronic transmission of the data stream between the input interface of the output interface

provided. By the receiver element, a reliable generation of the electrical signals from the data stream, which preferably has acoustic signals and / or light signals, can be provided. Analogously, a data stream can be provided by the transmitter element, which is likewise transferable again in the temperature control fluid line and has, for example, acoustic signals and / or light signals as information carrier. By the

Transmission of the data stream as an electrical signal between the input interface and the output interface, a particularly simple and especially secure transmission path between the input interface and the output interface can be provided. Also, in this embodiment, it is particularly easy to make it possible to change a transmission mode of the data stream in the individual tempering fluid lines, for example from acoustic signals in the tempering fluid line of the first battery stack to light signals in the tempering fluid line of the second battery stack. Also a tapping of the information of the data stream is particularly easy to provide by reading the electrical signals in the transmission element.

Particularly preferably, a connecting device according to the invention can be developed to the effect that the line element is a data cable and / or a

Plug connection is and / or that the receiver element and the line element and the transmitter element are arranged on a common printed circuit board. In this particularly preferred embodiment of an inventive

Connecting device can be a particularly compact design of the entire

Connection device can be provided. In addition, a particularly flexible space utilization by a connecting device according to the invention can be provided by a designed as a data cable line element. In one embodiment with In particular, for example, the line element may be formed as a simple printed circuit on a printed circuit board on a common printed circuit board. This also makes it possible to further increase the compactness of a connecting device according to the invention.

According to an alternative embodiment, in an inventive

Be provided connecting device, that the transmission element a

Temperierfluidleitungselement for conducting tempering fluid and for transmitting the data communication in the form of a data stream, wherein the input interface is a beginning of the element and the output interface is an element end of the

Form tempering fluid conduit element, and wherein the element beginning fluid communicating and data communicating with the communication end and the element end

can be connected in a fluid-communicating and data-communicating manner with the start of communication. In this alternative embodiment of an inventive

Connecting device is provided by the connecting device in particular also a fluidkommunizierende connection of Temperierfluidleitungen the first battery pack and the second battery pack. For this, the inventive

Connecting device on a Temperierfluidleitungselement on, between the

Communication end of the Temperierfluidleitung the first battery pack and the

Communication start of Temperierfluidleitung the second battery stack can be arranged. An element beginning and thus the input interface of the

Temperierfluidleitungselements can be connected in fluid communication and data communication with the communication end of the Temperierfluidleitung the first battery stack. An inflow of the tempering from the Temperierfluidleitung the first battery stack in the Temperierfluidleitungselement and at the same time an input of the data stream of the data communication from the Temperierfluidleitung the first

Battery pack in the Temperierfluidleitungselement can be provided in this way. The Temperierfluidleitungselement as part of the transmission element is in particular designed such that it is designed to forward both the Temperierfluids and the data stream. When using acoustic signals and / or light signals, this means in particular that the Temperierfluidleitungselement is also designed to forward the acoustic signals or the light signals. At the other end of the Temperierfluidleitungselements is the element end, which simultaneously represents the output interface of the connecting device, this Element ends are fluid-communicating and data-communicating with the

Communication start the Temperierfluidleitung the second battery stack is connectable. The tempering fluid can flow out in this way through the Temperierfluidleitungselement back to the Temperierfluidleitung in the second battery pack and at the same time the data stream of the data communication can also be transferred to the Temperierfluidleitung in the second battery stack. In summary, in this embodiment of a connecting device according to the invention, a particularly simple and compact construction of the connecting device can be provided, since in particular no

additional transmitter elements and / or receiver elements are necessary to a transmission of the data stream of the data communication from the communication end of the

Temperierfluidleitung in the first battery stack to communication start the

To provide Temperierfluidleitung the second battery stack, and also no additional components are necessary for a fluid-communicating connection of the Temperierfluidleitungen the first and second battery stack.

In a further alternative embodiment of an inventive

Connection device may further be provided that the input interface comprises a decoupling element for decoupling the data stream from the communication end, that the transmission element comprises a signal line element for transmitting the decoupled from the decoupled data stream, and further that the output interface is a coupling element for coupling the through the

Signal line element has transmitted data stream to the beginning of communication.

In this alternative embodiment of a connecting device according to the invention, the data stream can be transmitted from the communication end of the tempering fluid line of the first battery stack to the beginning of communication of the tempering fluid line of the second battery stack, without having to change the type of signals of the data stream. In other words, if the data stream of the data communication in the tempering lines is transmitted by acoustic signals and / or light signals, this type of transmission can also be achieved by the invention

Connection device can be provided. In particular, the signal line element is designed accordingly, with respect to the previous example, in particular for conducting acoustic signals and / or light signals. Nevertheless, this transmission is independent of the temperature control. This can be done by the decoupling element as part of Input interface and the coupling element are provided as part of the output interface. A binding of the signal transmission to the Temperierfluidleitung can be avoided in this way. Greater flexibility in the planning and / or construction of a battery system with a connection device according to the invention can be provided in this way.

According to a preferred development of an inventive

Connection device may further be provided that the connection device comprises a Temperierverbindung for fluid-communicating connecting the Temperierfluidleitung the first battery stack with the Temperierfluidleitung the second battery stack, in particular the Temperierverbindung is formed separately from the signal line element. In this way, in a connecting device according to the invention additionally a fluid-communicating connection of the Temperierfluidleitungen the first battery pack and the second battery pack can be provided. The tempering connection may preferably be arranged on or at least in the vicinity of the communication end of the tempering fluid line of the first battery stack and / or on or at least in the vicinity of the communication start of the tempering fluid line of the second battery stack. In this case, it can preferably be provided that the signal line element which is used for transmitting the data stream from the communication end of the tempering fluid line of the first battery stack to the communication start of the tempering fluid line of the second battery stack is formed independently and in particular separately from the temperature control connection. An overall particularly flexible embodiment of a connecting device according to the invention, in which nevertheless both the data stream of the data communication and the flow of tempering fluid between the two

Temperierfluidleitungen can be transmitted, can be provided in this way.

It can also be provided in a connection device according to the invention that the connection device, in particular the input interface and / or the transmission element and / or the output interface, having an amplifier element for amplifying the data stream. In a transmission of the data stream of

Data communication in the Temperierfluidleitungen it can come by attenuation processes to a reduction in the signal quality of the data stream. Worst case can this leads to a loss of information. By an amplifier element, a signal quality of the data stream can be improved again, so that the risk of data loss can be prevented by a reduced signal quality or at least significantly reduced.

Also, a connection device according to the invention may be designed such that the connection device, in particular the input interface and / or the transmission element and / or the output interface, a feed element for feeding state data of the first battery pack and / or the second

Battery pack into the data stream. In this embodiment of a

The connecting device according to the invention can also be used to connect the data stream of the data communication with additional information, in particular status data of the first battery stack and / or of the second

Battery pack, expand. This additional information about the state of the first battery pack and / or the second battery pack can be a quality of

Monitoring, control, and / or regulation of the individual battery packs can be further improved by the battery management system of the battery system.

Particularly preferably, a connection device according to the invention can be further developed such that the feed element is designed to feed in at least one value of one of the following state variables of the first battery stack and / or of the second battery stack:

- temperature

- electrical voltage

- electrical current

- electrical power

- leakage

- mechanical load

- Temperierfluidfluss

- tempering fluid temperature

In particular, this list is not completed, so that the feed-in element, if technically meaningful and possible, also for feeding in values of others State variables of the first battery stack and / or the second battery pack

can be trained.

Also, a connection device according to the invention can be further developed such that to provide a bidirectional data communication in the form of a data stream, the output interface for recording the data stream from the

Communication start is formed, the input interface for delivering the

Data stream is formed at the communication end, and further the

Transmission element is designed to transmit the data stream from the output interface to the input interface. In this particularly preferred embodiment of a connection device according to the invention, data communication can thus be carried out both from the individual battery stacks to the battery management system and in the other direction, ie. H. from the battery management system to the individual battery stacks. All the advantages described above with respect to data communication can thus be provided for both directions of the data communication. In other words, status data can be transmitted from the battery stacks to the battery management system, for example, which are evaluated there and, if necessary, control commands of the

Battery management system to be transferred back to the battery pack.

In addition, in a connecting device according to the invention may also be provided that the connecting device has a placement portion for

Arranging on a counter-assembly portion of an electrical interconnection element of the first battery pack and the second battery stack, in particular, the connection device is integrated into the interconnection element. such

Interconnection elements are used in particular for the electrical connection of the two battery stacks, for example for the electrical serial and / or parallel connection of the two battery stacks. An increase in performance of the entire battery system can be provided in this way. By arranging the connection device on such a connection element, in particular provided by a

Arrangement portion of the connection device and a counter-arrangement section on the electrical interconnection element, a particularly compact design of an entire battery or battery system can be provided. This compactness the entire battery system can be further increased by the

Connecting device is completely integrated or integrated into the Verschaltungselement.

According to a second aspect of the invention, the object is achieved by a

Battery system having at least a first battery stack, a second battery pack and a battery management system, wherein the first battery pack and the second

Battery pack each have at least one Temperierfluidleitung and each of the Temperierfluidleitungen the battery packs are at least partially used for transmitting a data communication in the form of a data stream of the battery management system. A battery system according to the invention is characterized in that the battery system is a connection device according to the first aspect of the invention for data-communicating the data communication in the form of a data communication

Data stream of the battery management system in the first battery pack and second

Battery stack has. Thereby, all the advantages described in detail with respect to a connection device according to the first aspect of the invention can also be provided by a battery system according to the second aspect of the invention.

Further advantages, features and details of the invention will become apparent from the

following description, with reference to the drawings

Embodiments of the invention are described in detail. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination. The explanations of

Embodiments describe the present invention purely by way of example. Of course, individual features of the embodiments, if technically feasible, can be combined freely with one another, without departing from the scope of the present invention. Elements with the same function and mode of operation are provided with the same reference numerals in the figures. They show schematically:

1 shows a first embodiment of a battery system according to the invention with a connecting device according to the invention, 2 shows a second embodiment of a battery system according to the invention with a connecting device according to the invention,

3 shows a third embodiment of a battery system according to the invention with a connecting device according to the invention, and

Fig. 4 is a Verschaltungselement with an inventive

Connecting device.

Various embodiments of a battery system 100 are shown in FIGS. 1 to 3, each having different embodiments of a connecting device 1 according to the invention. In all of the illustrated embodiments, battery system 100 includes a first battery pack 102 and a second battery pack, respectively

Battery pack 103 shown, each having a Temperierfluidleitung 50. A data communication 2 in the form of a data stream 1, for example with a schematically shown battery management system 101, is present in the two Temperierfluidleitungen 50 and ends in the Temperierfluidleitung 50 of the first battery stack 102 in a communication end 51 of the Temperierfluidleitung 50, wherein at a

Communication start 52 of the Temperierfluidleitung 50 of the second battery stack 103 of the data stream 70 of the data communication 2 starts again. The data communication 2 or the data stream 70 can preferably be transmitted in the temperature control lines 50 as acoustic signals and / or as light signals. The various embodiments of an inventive invention described below

Connection device 1 can each provide a data-communicating connection of the two tempering fluid lines 50, as a result of which the data communication 2 as a whole can be provided with continuous data communication 2 in both battery stacks 101, 103. A data communication 2 in the form of a data stream 70 of the

Battery management system 101 each separately with the individual battery stacks 102, 103 can be avoided in this way. In order to be able to provide this, a connection device 1 according to the invention generally has an input interface 10, which can be arranged at the communication end 51. Furthermore, an inventive

Connecting device 1, an output interface 30, which in turn with the

Communication start 52 of the Temperierfluidleitung 50 of the second battery stack 103rd can be arranged. Between the input interface 10 and the output interface 30, a transmission element 20 of the connecting device 1 according to the invention is arranged, which is a transport of the data stream 70 of the data communication 2 of the

Can provide input interface 10 to the output interface 30.

In Fig. 1 is a first embodiment of an inventive

Connecting device 1 shown. The connection device 1 has, in particular as part of the input interface 10, a receiver element 11 which is designed to receive the data stream 70 and in particular to convert the data stream 70 into electrical signals. Subsequent to the receiver element 1 1, a line element 21 is arranged as part of the transmission element 20, which is designed in particular for forwarding the data stream 70 in the form of electrical signals. For example, the line element 21 may be formed as a data cable and / or plug connection. At the other end of the conduit member 21, a transmitter element 31 is provided as part of the output interface 30, which in turn is configured to convert the electrical signals in which the data stream 70 is present into a waveform that is transferable in the tempering fluid conduit 50 of the second battery stack 103. As already described above, such a signal form may be, for example, an acoustic signal form and / or light signals.

Without limitation to this embodiment of an inventive

Connecting device 1, in this illustration, further an amplifier element 41 and a feed element 42 are shown. Also shown in the further FIGS. 2 and 3

Embodiments of a connecting device 1 according to the invention may have correspondingly formed amplifier elements 41 and / or feed elements 42. By such an amplifier element 41 can be provided in particular that the signals of the data stream 70 by an inventive

Connecting device 1 can be amplified. A data loss by a

Reduction of the signal quality of the data stream 70, for example by attenuation during data transmission, can thereby be avoided. Further, through the feed element 42 shown, a feed of state data of the first battery stack 102 and / or the second battery stack 103, for example a total voltage, a total current or a temperature, into the data stream 70 of the data communication 2 be made. As a result of this additional status data as part of the data stream 70, monitoring, control, regulation and / or control by the

Battery management system 101 can be performed even better.

Fig. 2 now shows an alternative embodiment of an inventive

Connecting device 1 for data-communicating connecting the

Temperierfluidleitungen 50 of the first battery stack 102 and the second battery stack 103. In this embodiment, in particular, the transmission element 20 comprises a Temperierfluidleitungselement 22. This Temperierfluidleitungselement 22 is for fluid-communicating with both the communication end 51 of

Temperierfluidleitung 50 of the first battery stack 101 and with the

Communication start 52 of the Temperierfluidleitung 50 of the second battery stack 103 is provided, shown in Fig. 2 by the dashed connecting line. A flow or a transport of the tempering fluid 53 from the Temperierfluidleitung 50 of the first

Battery stack 102 through the Temperierfluidleitungselement 22 in the Temperierfluidleitung 50 of the second battery stack 103 can be provided in this way. At the same time the Temperierfluidleitungselement 22 is also designed to conduct the data stream 70 of the data communication 2. For example, if the data stream 70 is present as acoustic signals and / or light signals, the Temperierfluidleitungselement 22 may be formed such that it is also designed for the transmission of acoustic signals and / or light signals. The input interface 10, which is formed in this embodiment as element start 12 of the Temperierfluidleitungselements 22, is connected to the communication end 51 both fluid-communicating and data-communicable connected or connected. Analogously, the element end 32 of the

Temperierfluidleitungselements 22, which in this embodiment, the

Output interface 30 of the connecting device 1 according to the invention forms fluidkommunizierend and datenkommunizierend with the communication start 52 of the Temperierfluidleitung 50 of the second battery stack 103 connectable or connected. In other words, a particularly simple connection between the two Temperierfluidleitungen 50 can be provided in this way, both in terms of transmission of the Temperierfluids 53 and with respect to a transmission of the data stream 70 of the data communication 2. In particular, in this

Embodiment of a connecting device 1 according to the invention no receiving or transmitter elements 31 necessary to transmit the data stream 70 of the data communication 2 between the two Temperierfluidleitungen 50.

Another possible embodiment of an inventive

Connecting device 1 is shown in Fig. 3. In this embodiment of a connecting device 1 according to the invention, the input interface 10

in particular, a decoupling element 13, which is designed for decoupling the data stream 70 of the data communication 2 from the communication end 51 of the Temperierfluidleitung 50 of the first battery stack 102. In other words, the data stream 70 can be transferred from the coupling-out element 13 to a signal line element 23, which in this embodiment forms part of the transmission element 20 of the connection device 1 according to the invention, the signal type of the data stream 70 in particular not changing. In other words, in the signal line element 23, the data stream 70 of the data communication 2 is present in the same type of signal as is present in the temperature control fluid lines 50. This also means in particular that if the data stream 70 is present as acoustic signals and / or light signals in the Temperierfluidleitungen 50, the signal line element 23 is also designed for transmitting acoustic signals and / or light signals. At the other end of the signal line element 23 there is in turn a coupling element 33, which forms part of the output interface 30 of the connecting device 1 according to the invention in this embodiment. This coupling element 33 receives the signals of the data stream 70 from the

Signal line element 23 and couples the signals of the data stream 70 of

Data communication 2 at the beginning communication 52 in the Temperierfluidleitung 50 of the second battery pack 103 again. A secure data-communicating connection of the Temperierfluidleitungen 50 of the first battery pack 102 and the second

Battery stack 103 and thus a continuous data communication 2 or a continuous data stream 70 can thus also be provided in this embodiment of a connection device 1 according to the invention. In addition, in this embodiment, the connection device 1 according to the invention as a possible development on a Temperierverbindung 40, which communicates fluidkommunizierend in the illustrated embodiment of a connecting device 1 according to the invention both with the communication end 51 of the Temperierfluidleitung 50 of the first battery 102 and the beginning of communication 52 of the Temperierfluidleitung 50 second Battery stack 103 is connected or connected. In this manner, it is thus possible to conduct the tempering fluid 53 from the tempering fluid conduit 50 of the first

Battery stack 102 are provided in the Temperierfluidleitung 50 of the second battery stack 103. By the integration of the Temperierfluidleitung 50 in the

Overall, a particularly compact embodiment of a battery system 100 according to the invention with a continuous tempering fluid line 50 in both battery stacks 101, 103 can be provided.

FIG. 4 shows two views of a connection element 60, as can be used in a battery system 100 according to the invention (not shown). The left picture shows in particular a side view, the right one

Frontal view. Such a connection element 60 is provided in particular for an electrical connection of the two battery stacks 101, 103 (each not shown), and in particular has electrical contacts 62 for this purpose. Via a fastening portion 63, the interconnection element 60 can be arranged on the two battery stacks 101, 103. In addition, such a connection element 60 a

Counterposition portion 61, with which an arrangement portion 43 of the connecting device 1 according to the invention can be brought into operative connection. In this way, an arrangement, in particular a fastening, of a connecting device 1 according to the invention can be provided on such a connecting element 60. Of the connection device 1 according to the invention, in particular the input interface 10 and the output interface 30 are visible in FIG. 4. By means of this arrangement, in particular integration, of the connection device 1 according to the invention into a connection element 60 of a battery system 100, a particularly compact design of the entire battery system 100 can be provided.

REFERENCE CHARACTERS

1 connection device

2 data communication

10 input interface

1 1 receiver element

12 element beginning

13 decoupling element

20 transmission element

21 line element

22 tempering fluid conduit element

23 signal line element

30 output interface

31 transmitter element

32 element end

33 coupling element

40 tempering connection

41 amplifier element

42 feed element

43 arrangement section

50 tempering fluid line

51 communication end

52 Communication start

53 tempering fluid

60 interconnection element

61 Counterparty section

62 contact Mounting section data stream battery system

Battery management system of the first battery stack of the second battery pack

Claims

Patent claims

A connection device (1) for data-communicating connection of a data communication (2) of a battery management system (101) in the form of a data stream (70) in a first battery stack (102) and a second battery stack (103), wherein the first battery stack (102) and the each battery stack (103) each have at least one Temperierfluidleitung (50) and in each case the Temperierfluidleitungen (50) at least partially used for transmitting the data stream (70), and further wherein the transmission of the data stream (70) in the first battery stack (102) in a Communication end (51) of the Temperierfluidleitung (50) ends and in the second battery stack (103) in a communication start (52) of the Temperierfluidleitung (50) starts, characterized in that the connecting device (1) at the communication end (51) of the Temperierfluidleitung (50) of the first battery stack (102) can be arranged input interface (10) for receiving the data stream (70) from the communication end (51), further comprising the connection device (1) at the communication start (52) of the Temperierfluidleitung (50) of the second battery stack (103) can be arranged output interface (30) for outputting the data stream (70) to the communication start (52) and the connection device (1) further comprises a transmission element (20), wherein the transmission element (20) is data communicating with the input interface (10) and the output interface (30) for transmitting the data stream (70) from the input interface (10) to the Output interface (30).

2. Connecting device (1) according to claim 1, characterized in that the transmission of the data stream (70) in the Temperierfluidleitungen (50) on acoustic signals, in particular ultrasonic signals, and / or light signals, in particular infrared signals, based, wherein the input interface (10) for recording and the output interface (30) for outputting acoustic signals and / or light signals are formed.

3. Connecting device (1) according to claim 1 or 2, characterized in that the input interface (10) has a receiver element (1 1) for generating electrical signals from the in the Temperierfluidleitung (50) of the first Battery pack (102) and at the communication end (51) recorded data stream (70),

in that the transmission element (20) has a line element (21) for transmitting the electrical signals from the input interface (10) to the output interface (30),

and in that the output interface (30) further comprises a transmitter element (31) for generating a data stream (70) transferable in the temperature control fluid line (50) for outputting the data stream (70) to the communication start (52).

4. Connecting device (1) according to claim 3, characterized in that the line element (21) is a data cable and / or a plug connection and / or that the receiver element (1 1) and the line element (21) and the transmitter element (31) a common circuit board are arranged.

5. Connecting device (1) according to claim 1 or 2, characterized in that the transmission element (20) has a Temperierfluidleitungselement (22) for conducting tempering fluid (53) and for transmitting the data communication (2) in the form of a data stream (70), wherein the input interface (10) forms an element start (12) and the output interface (30) forms an element end (32) of the tempering fluid conduit element (22), and wherein the element start (12) is in fluid communication and data communication with the communication end (51) and the element end (32 ) can be connected in a fluid-communicating and data-communicating manner with the start of communication (52).

6. Connecting device (1) according to claim 1 or 2, characterized in that the input interface (10) has a decoupling element (13) for decoupling the data stream (70) from the communication end (51),

in that the transmission element (20) has a signal line element (23) for transmitting the data stream (70) decoupled by the decoupling element (13), and in that the output interface (30) has a coupling element (33) for coupling in the signal line element (23) Data stream (70) to the communication start (52).

7. Connecting device (1) according to claim 6, characterized in that the connecting device (1) a Temperierverbindung (40) for fluidkommunizierenden connecting the Temperierfluidleitung (50) of the first battery stack (102) with the Temperierfluidleitung (50) of the second battery stack (103) wherein, in particular, the tempering connection (40) is formed separately from the signal line element (23).

8. Connecting device (1) according to one of the preceding claims, characterized in that the connecting device (1), in particular the input interface (10) and / or the transmission element (20) and / or the output interface (30), an amplifier element (41) for amplifying the data stream (70).

9. Connecting device (1) according to one of the preceding claims, characterized in that the connecting device (1), in particular the input interface (10) and / or the transmission element (20) and / or the output interface (30), a feed element (42) for feeding status data of the first battery stack (102) and / or the second battery stack (103) into the data stream (70).

10. The connecting device (1) according to claim 9, characterized in that the feed element (42) is designed to feed at least one value of one of the following state variables of the first battery stack (102) and / or the second battery stack (103):

- temperature

- electrical voltage

- electrical current

- electrical power

- leakage

- mechanical load

- Temperierfluidfluss

- tempering fluid temperature

1 1. Connection device (1) according to one of the preceding claims, characterized in that for providing a bidirectional data communication (2) in the form of a data stream (70), the output interface (30) for receiving the data stream (70) from the communication start (52) is formed, the input interface (10) for outputting the data stream (70) to the communication end (51) is formed, and further formed the transmission element (20) for transmitting the data stream (70) from the output interface (30) to the input interface (10) is.

The connection device (1) according to any one of the preceding claims, characterized in that the connection device (1) has a disposition portion (43) for locating on a counter disposition portion (61) of an electrical interconnection element (60) of the first battery stack (102) and the second battery stack (103), wherein in particular the connection device (1) can be integrated into the interconnection element (60).

13. Battery system (100) with at least one first battery stack (102), a second

Battery stack (103) and a battery management system (101), wherein the first battery stack (102) and the second battery stack (103) each have at least one Temperierfluidleitung (50) and each of the Temperierfluidleitungen (50) of the battery pack (102, 103) at least partially to Transfer one

Data communication (2) in the form of a data stream (70) of the

Battery Management System (101) are used, characterized in that the battery system (100) is a connection device (1) according to one of the preceding claims for data - communicating connecting the data communication (2) in the form of a data stream (70)

Battery management system (101) in the first battery stack (102) and second battery pack (103).