Battery control with cell voltage verification

Abstract

A battery arrangement for connection to an electric machine and / or a power supply is disclosed, comprising: a plurality of battery cells, wherein a first sub-number connected in series forms a first string, a second sub-number connected in series forms a second string, and a third sub-number connected in series forms a third string, the first string, the second string and the third string being connectable as one respective phase to the electric machine; a plurality of battery cell controllers forming a plurality of slave nodes, each battery cell controller connecting at least one terminal of a plurality of battery cells within one string, each battery cell controller comprising a power electronics arrangement and a sensor configured to obtain at least one battery cell parameter; and a master node configured to connect to each of the first string, the second string and the third string, the master node further being configured to obtain a total parameter of a respective one of the first string, the second string and the third string; the battery arrangement being configured to mutually authenticate the obtained at least one battery cell parameter and the obtained total parameter.

Description

Technical Field

[0001] The present disclosure relates to electric and / or hybrid electric vehicle drive technology. In particular, the present disclosure relates to a battery arrangement, a method for controlling such a battery arrangement, and a vehicle including such a battery arrangement. Background Art

[0002] Electric vehicles are an increasingly important segment of the vehicle fleet today and in the future. For example, regional and / or global climate goals require practical and efficient electric drive technology.

[0003] Practical experience shows that electric drive technology is subject to limitations, for example, due to the battery configurations available today. This is due to complex requirements, such as a high number of charging cycles, performance requirements in terms of power output, available capacity, operating conditions, etc.

[0004] For example, if the electric machine is to be operated together with a control battery arrangement, the control battery arrangement sets high requirements. Summary of the Invention

[0005] Therefore, it may be desirable to provide improved control over a battery arrangement, or at least a portion thereof.

[0006] The objects of the present disclosure are solved by the subject-matter of the attached independent claims, wherein further embodiments are incorporated in the dependent claims.

[0007] According to a first aspect, there is provided a battery arrangement for connection to a motor and / or a power supply, comprising:

[0008] a plurality of battery cells, wherein a first subnumber connected in series forms a first string, a second subnumber connected in series forms a second string, and a third subnumber connected in series forms a third string, the first string, the second string, and the third string being connectable as one respective phase to a motor; and

[0009] a plurality of battery cell controllers forming a plurality of slave nodes, each battery cell controller connected to at least one terminal of a plurality of battery cells within a string, each battery cell controller comprising a power electronics arrangement and a sensor configured to acquire at least one battery cell parameter; and

[0010] a master node configured to be connected to each of the first string, the second string, and the third string, the master node further configured to obtain a total parameter of a corresponding one of the first string, the second string, and the third string;

[0011] The battery arrangement is configured to mutually verify the acquired at least one battery cell parameter and the acquired overall parameter.

[0012] In this way, cell voltage verification can be determined, thereby improving the accuracy of controlling battery placement.

[0013] As used herein, the battery in an electric vehicle and hybrid vehicle that can be arranged in a battery arrangement or assembly as described herein provides electrical energy to the electric motor(s) (i.e. electric machine) which is converted into mechanical kinetic energy for propulsion.

[0014] Furthermore, each of the plurality of battery cells (which can also be referred to as battery segments and can be, for example, lithium-ion technology) is itself a power source. These can also power, for example, a battery cell controller.

[0015] For example, each of the plurality of battery cell boards can contain four terminals or output points. Two of these can be AC terminals or power points, and two can be isolated DC terminals or power points. The connection of the battery cell to the outside world can be done through these points.

[0016] When a battery cell is connected to one or more other battery cells, here the number of battery cell controllers can be determined between the two cell AC points, rather than between the cell terminals as in conventional technology. Since the battery cell itself can control internally (i.e. through the battery cell controller connected to it) whether and how it is connected to the AC terminals, this allows the battery cell to disconnect itself from the main battery without significantly affecting the overall battery arrangement or battery pack performance. This mode can also be referred to as bypass mode and can be the default. The battery cell controller can be designed as one per battery cell, or even one per two or more battery cells.

[0017] In electric and hybrid vehicles, the battery cell controller and / or power electronics etc. control the electric drive and establish a connection between the electric motor and, for example, the high-voltage battery and / or the individual battery cells.

[0018] Furthermore, as used herein, the master node can be configured to connect to each of the plurality of battery cell controllers, which can also be referred to as a plurality of slave nodes. The master node can be configured to broadcast information or data to each slave node, for example as information or data transmitted as a message, which can be in a predefined format. Likewise, each slave node or one slave node per string can be configured to send information or data (for example in a message in a predefined format) to the master node and / or one or more of the other slave nodes. Furthermore, one or more (or even each) slave node can be configured to broadcast information or data within the system of the battery arrangement. For example, the master node can be configured to connect to one or more slave nodes, for example through a communication interface, through wireless communication or another galvanically isolated communication.

[0019] Furthermore, the master node may be configured to generate a virtual sine wave as control information to be used by the slave node to control the battery unit (eg, to switch on or off). The slave node uses the virtual sine wave to generate a corresponding signal by switching the battery switch on or off.

[0020] In addition, for example, there can be a master node / slave node work split to provide distributed feedback control. The master node can be configured to request, for example, one or more of the following: modulator phase current, phase angle, current cycle time, and resolver angle per millisecond (ms). The slave node can operate with closed-loop phase current control at approximately 10kHz and can include onboard current sensors to achieve the desired phase current and can detect or determine the cycle time, current set point, and resolver angle updated every millisecond (ms). Optionally, to improve control performance, the slave node can also measure the phase between current and voltage to adjust its own phase. The slave node can also include internal slave current control.

[0021] According to an embodiment, the battery arrangement can also be configured to mutually verify the obtained at least one battery cell parameter and the obtained total parameter by controlling only one slave node to be activated at a time and obtaining at least one battery cell parameter of the corresponding activated slave node and / or battery cell.

[0022] In an embodiment, the battery arrangement may be further configured to activate each of the plurality of slave nodes one by one, obtain the corresponding at least one battery cell parameter, add the parameters together, and then perform verification using the obtained total parameter.

[0023] According to an embodiment, the master node may also be configured to connect to each of the first string, the second string, and the third string via a wireless communication interface or other galvanically isolated communication method.

[0024] In an embodiment, multiple slave nodes may also be configured to connect to the master node via a wireless communication interface or other galvanically isolated communication methods.

[0025] According to an embodiment, a plurality of slave nodes may each have an assigned identifier to be recognized and / or addressed by the master node.

[0026] In an embodiment, the plurality of slave nodes may each have an assigned Media Access Control (MAC) address to be identified and / or addressed by the master node.

[0027] According to an embodiment, the power electronics arrangement of each of the plurality of busbar unit connectors may include an H-bridge including a plurality of power switches configured to be selectively connected to corresponding battery cells.

[0028] In an embodiment, the battery arrangement may further be configured to mutually verify the acquired at least one battery cell parameter and the acquired overall parameter during a start-up phase of the battery arrangement.

[0029] According to a second aspect, there is provided a vehicle comprising:

[0030] motors; and

[0031] According to the battery arrangement of the first aspect, the battery arrangement is connected to the electric machine.

[0032] In an embodiment, the vehicle may further comprise a power interface, to which the battery arrangement is further connected.

[0033] According to a third aspect, a method for controlling a battery arrangement comprising a plurality of battery cells is provided, wherein a first sub-number of battery cells connected in series form a first string, a second sub-number of battery cells connected in series form a second string, and a third sub-number of battery cells connected in series form a third string, the first string, the second string, and the third string being connectable to a motor as a respective phase, a plurality of battery cell controllers forming a plurality of slave nodes, each battery cell controller being connected to at least one terminal of a plurality of battery cells within a string and a master node, the method comprising:

[0034] obtaining, by at least a portion of the plurality of battery cell controllers, at least one battery cell parameter;

[0035] Obtaining, by the master node, a total parameter of a corresponding one of the first string, the second string, and the third string; and

[0036] The at least one battery cell parameter determined by the battery arrangement and the determined overall parameter are mutually verified.

[0037] The method may be at least partially computer-implemented and may be implemented in software or hardware, or in both. Furthermore, the method may be performed by computer program instructions running on a component that provides data processing functionality. The data processing component may be a suitable computing component, such as an electronic control module. It may also be a distributed computer system. The data processing component or computer may each include one or more of a processor, memory, a data interface, and the like.

[0038] According to a further aspect, a computer program element for operating a haptic system is provided, which, when executed by a processing unit, is adapted to perform the method steps of the first aspect.

[0039] According to another aspect, a computer readable medium storing the computer program element of the fourth aspect is provided.

[0040] It should be noted that the above embodiments can be combined with each other, regardless of the aspects involved. Thus, the method can be combined with structural features, and similarly, the device and system can be combined with features described above in relation to the method.

[0041] These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Exemplary embodiments of the present invention will be described below with reference to the following drawings.

[0043] Figure 1 A battery arrangement for connection to a motor and / or a power supply according to an embodiment is shown in a schematic top view.

[0044] Figure 2A A perspective view shows a battery cell controller designed to be one per battery cell according to an embodiment.

[0045] Figure 2B A battery cell controller designed for every two or more battery cells according to an embodiment is shown in a perspective view.

[0046] Figure 3 The structure of a battery cell controller according to an embodiment is shown in an exploded view.

[0047] Figure 4 A portion of a battery arrangement according to an embodiment, in particular a portion of a battery cell controller, is shown in a cross-sectional view.

[0048] Figure 5 A portion of a battery arrangement according to an embodiment, in particular a portion of a battery cell controller, is shown in a cross-sectional view.

[0049] Figure 6 A method for removing heat from a battery cell controller of a battery arrangement connected to an electric machine and / or a power source according to an embodiment is shown in a flow chart.

[0050] Figure 7 A battery arrangement for connection to a motor and / or a power supply according to an embodiment is shown in a schematic top view.

[0051] Figure 8 The scheduling of a multidirectional broadcast according to an embodiment is shown in a timeline.

[0052] Figure 9 The tasks of a master node and one or more slave nodes that are triggered and / or synchronized by an update event are shown in a timeline.

[0053] The accompanying drawings are only schematic representations and serve only to illustrate embodiments of the present disclosure. In principle, identical or equivalent elements are provided with the same reference numerals. DETAILED DESCRIPTION

[0054] Figure 1 A battery arrangement 100 is shown for connecting to a motor 200 and / or a power source 300. Figure 1 , the connection(s) between the battery arrangement 100 and the electric machine 200 are indicated by solid lines. The electric machine 200 is, for example, a three-phase electric motor, which is, for example, part of the vehicle 1 or a powertrain or drive of the vehicle. The battery arrangement 100 is configured to provide electrical energy to the electric machine 200 and / or a power source and / or to be charged via the power source.

[0055] The battery arrangement 100 comprises a plurality of battery cells 110 connected in series into three strings, providing three phases to operate the motor 200, i.e. each string forms one phase if each string is connected to the motor 200. The three strings are connected in series into three strings, providing three phases to operate the motor 200. Figure 1 In other words, as Figure 1 As shown, a first sub-number of battery cells 110 connected in series form a first string, a second sub-number of battery cells 110 connected in series form a second string, and a third sub-number of battery cells 110 connected in series form a third string, and the first string, second string and third string can be connected to the motor 200 as a corresponding phase.

[0056] In addition, if the battery cells 110 are connected in an appropriate number to achieve the desired voltage, the battery arrangement 100 can also be connected to a power source (e.g., a 50 Hz power source, etc.), and the battery cells 110 can be charged by the power source, or energy can be provided from the battery cells 110 to the grid.

[0057] The battery arrangement 100 further includes a plurality of battery cell controllers 120, each of which is connectable to or connected to a terminal of at least one of the plurality of battery cells 110 within a string. The plurality of battery cell controllers 120 may also be referred to as a plurality of nodes, i.e., a plurality of slave nodes, which will be explained in more detail further below.

[0058] Therefore, the battery cell controller 120 can be designed as follows Figure 2A One per battery cell 110 as shown or Figure 2B One for every two or more battery cells 110 shown. Each of the plurality of battery cells 110 includes four terminals or output points. Two of them can be AC ​​terminals or power supply points, and two can be isolated DC terminals or power supply points, such as Figure 2A An electrode represented by AC and DC.

[0059] Reference Figure 3 , which shows in exploded view the structure of a battery cell controller 120. Each battery cell controller 120 comprises a power electronics arrangement 121 embedded in a multilayer structure, which may also be referred to as at least one printed circuit board (PCB) or a combination of several PCBs or parts thereof.

[0060] like Figure 3 As shown, the PCB of the battery cell controller 120 can be formed in multiple layers, and the base layer or first layer 122 can include at least a portion made of a metal core or metal back and can be configured as (in Figure 3 The top or second layer 124 includes at least a portion made of a metal core or metal back and can be configured as (in Figure 3 The busbars are connected to the corresponding terminals (via corresponding through-holes) to form at least a portion of the busbar. For example, the first layer 122 can be formed as a PCB layer, where, for example, the two busbar parts can be made of a metal-backed PCB. The middle layer can be formed, for example, from a standard PCB that includes one or more through-holes in appropriate locations to locate the embedded power electronics arrangement 121. Atop this layer, a controller unit or chip 125 and / or a transformer core can be arranged.

[0061] The power electronics arrangement 121 comprises a plurality of power switches, such as FETs, MOSFETs, etc. The second layer may be formed by a standard PCB and two metal backer PCBs.

[0062] Still refer to Figure 3 , the power electronic arrangement 121 may be arranged between a base or first layer 122 and a top or second layer 124 , thereby contacting at least one layer of conductive material.

[0063] Figure 4 A portion of the battery arrangement 100, in particular a portion of the battery cell controller 120, is shown in cross-section. Figure 4 As shown by arrows A and B, each battery cell controller 120 includes or forms a first heat conduction path extending from the power electronics arrangement via the terminals to the body of the corresponding battery cell 110. Thus, the power electronics arrangement 121 contacts the corresponding terminals via the conductive material (i.e., the metal core or metal back) integrated into the plurality of battery cell controllers 120, as described above.

[0064] Figure 5 A portion of the battery arrangement 100, in particular a portion of the battery cell controller 120, is shown in cross-section. Figure 5As shown by arrows C and D, the multiple battery cell controllers 120 also include or form a second heat conduction path extending from the power electronics arrangement 121 through the terminals and / or bodies of the battery cells 110 to the housing 130 of the corresponding battery cells 110 and / or the battery arrangement 100. As shown, the housing 130 covers the multiple battery cell controllers 120 and contacts at least a portion of the top side of the multiple battery cell controllers 120. Furthermore, the housing 130 contacts the multiple battery cell controllers 120 via a thermal interface material (TIM) 126 disposed between at least a portion of the multiple battery cell controllers and the housing, which also contacts the battery cell controllers. For example, the thermal interface material 126 can be formed as a pad that two-dimensionally contacts each of the multiple battery cell controllers 120 and the housing 130. Furthermore, for example, the housing 130 can have an outer surface exposed to the ambient air surrounding the battery arrangement 100. Furthermore, the housing 130 can be made of aluminum or an aluminum alloy.

[0065] Alternatively or additionally, such as Figure 5 As shown by the dashed line, battery arrangement 100 may further include a third heat conduction path arranged and / or formed between the plurality of battery cells 100 by a heat conduction blade 140, wherein the heat conduction blade 140 contacts at least a portion of the body of the plurality of battery cells 100 and / or the plurality of battery cell controllers 120 and is exposed to ambient air relative to the battery arrangement 100. According to claim 16, the heat conduction blade is coupled to the body of the plurality of battery cells and / or the plurality of battery cell controllers by interconnecting a thermal interface material 126 therebetween.

[0066] In an example not shown, the battery arrangement further includes a fourth heat conduction path formed by a plurality of tracks extending along at least a portion of the plurality of battery cell controllers.

[0067] Optionally, each of the plurality of battery cell controllers 120 may be materially bonded to a terminal of the battery cell 110. Alternatively, the connection may be made by a threaded connection. For example, the material bond may be formed by a weld bond. Furthermore, the material bond may be formed by laser welding.

[0068] Further optionally, the plurality of battery cells 110 may be connected to at least one refrigerant and / or coolant circuit 400 ( Figure 5 By means of this loop (indicated by a dotted line for only one battery cell 100 ), thermal energy released from the power electronics arrangement 121 to the body of the plurality of battery cells 110 can be dissipated.

[0069] refer to Figure 6, which shows a flow chart, a method for removing heat from a battery cell controller 120 of a battery arrangement 100 (such as described above) connected to a motor 200 and / or a power source 300 may be performed as follows.

[0070] In step S100, a plurality of battery cells 100 are provided, wherein a first number of battery cells 100 connected in series form a first string, a second number of battery cells 100 connected in series form a second string, and a third number of battery cells 100 connected in series form a third string, and the first string, the second string, and the third string can be connected to a motor as a corresponding phase.

[0071] In step S200 , a plurality of battery cell controllers 120 are provided, each battery cell controller 120 comprising at least one power electronics arrangement 121 .

[0072] In step S300 , each of the plurality of battery cell controllers is connected to a terminal of at least one of the plurality of battery cells 110 within a string, and each battery cell controller 120 includes or forms a first heat conduction path extending from the power electronics arrangement 121 via the terminal to the body of the corresponding battery cell 110 .

[0073] Reference Figure 7 , which shows that with Figure 1 Similar to the battery arrangement 100, the battery arrangement 100 includes a plurality of battery cells 110, which form three strings, i.e., three phases, to be connected to the motor 200 and / or the power source 300. In addition, the battery arrangement 100 includes a plurality of battery cell controllers 120, wherein these controllers further form a plurality of slave nodes. Thus, each battery cell controller 120 is connected to at least one terminal of a plurality of battery cells in a string, and each battery cell controller 120 includes a power electronics arrangement 121 and a sensor 127 (see, for example, Figure 3 ), the sensor 127 is configured to obtain at least one battery cell parameter. Furthermore, the battery arrangement 100 includes a master node 150, which is configured to connect to each of the first, second, and third strings and / or each of the slave nodes, i.e., the plurality of battery cell controllers 120. Furthermore, the master node is configured to obtain a total parameter of a corresponding one of the first, second, and third strings. Thus, the battery arrangement 100 is configured to mutually verify the obtained at least one battery cell parameter and the obtained total parameter. The total parameter may be, for example, the total voltage or current of the corresponding string.

[0074] In other words, the master node 150 is configured to measure and / or determine a total parameter of each string (e.g., total voltage, its phase, etc., total current, SOC, temperature, etc.). This total parameter can be verified by turning on one slave node with a cell parameter (e.g., voltage) measurement, measuring the cell parameter (e.g., total voltage, its phase, etc., total current, SOC, temperature, etc.) at a time and comparing the value from the slave node with the total value measured by the master node. For example, this can be performed during startup, such as startup of the battery arrangement 100 and / or vehicle 1. Furthermore, for example, in DC operation, the values ​​from the slave nodes can be summed and compared with the measured value of the master node. In AC operation, the stable condition can be controlled for a time interval, e.g., approximately 100 milliseconds, to collect data from the slave nodes. Furthermore, the battery arrangement 100 can also be configured to mutually verify the at least one cell parameter obtained and the total parameter obtained by controlling only one slave node to be activated at a time and obtaining at least one cell parameter of the corresponding activated slave node and / or battery cell.

[0075] In addition, the battery arrangement may be further configured to activate each of the plurality of slave nodes one by one, obtain the corresponding at least one battery cell parameter, add the parameters together, and then perform verification using the obtained total parameter.

[0076] Still refer to Figure 7 , which shows that with Figure 1 Similar to battery arrangement 100, battery arrangement 100 includes a plurality of battery cells 110, which form three strings, i.e., three phases, for connection to motor 200 and / or power source 300. Furthermore, battery arrangement 100 includes a plurality of battery cell controllers 120, wherein these controllers further form a plurality of slave nodes. Thus, each battery cell controller 120 is connected to at least one terminal of a plurality of battery cells within a string, and each battery cell controller 120 includes a power electronics arrangement. Furthermore, battery arrangement 100 includes a master node 150, which is configured to broadcast a control information message to each of the plurality of slave nodes, allowing each slave node to control its power electronics arrangement 121.

[0077] In other words, the battery arrangement 100 includes a master node 150, which is configured to dictate the behavior of the system (i.e., the battery arrangement 100), and multiple slave nodes (i.e., the battery cell controller 120), which are mounted directly on the battery cells 110. The slave devices know their position in the battery arrangement. They receive broadcast control information messages simultaneously or within agreed-upon time limits. They can be configured to connect and disconnect based on the control information messages included therein (e.g., modulator angle, etc.). The slave devices are connected in three strings, and together they can create three sinusoidal voltages that are controlled to achieve the desired phase current, such as torque. The master node 150 can be configured to generate a virtual sine wave, which can also be referred to as a modulator. This is accomplished by broadcasting propulsion request information at a predetermined rate (e.g., every millisecond). The broadcast can be performed via radio or other galvanically isolated communication methods. Because the broadcast transmission delay is well defined and the absolute time is sent in the broadcast message, the entire system will have the same absolute time with an accuracy better than 1 microsecond. The slave nodes can have time slots that are scheduled to distribute information to the system. Slave nodes broadcast messages in the same manner as master node 150. This way, all nodes in the system will have access to all information currently flowing through the network. Slave node responses can be scheduled so that three slave nodes (one for each string) have time to respond between each master transmission. For example, the current from each string with the same timestamp is available on the network, enabling analysis of every millisecond of AC current based on internal current sensors in the slave nodes.

[0078] Figure 8 The scheduling of the multi-directional broadcasts described above is shown in a timeline. The time interval T can be in the millisecond or microsecond range, for example, approximately 1 ms. M can indicate the transmission of the master node 150, and 1:1, 2:1, 3:1, etc. can indicate the corresponding time slots of the corresponding battery cell controller 120 (i.e., the slave node) between each broadcast of the master node 150. As described above, the numbers 1:1, 1:2, and 1:3 refer to the corresponding strings of battery cells 110.

[0079] In other words, the master node 150 can be configured to generate a virtual sine wave, which is also called a modulator. This can be done by broadcasting propulsion request information at a predetermined rate (e.g., every millisecond). The broadcast can be performed by radio or other galvanically isolated communication methods. Because the broadcast transmission delay is well defined and the absolute time is sent in the broadcast message, the entire system (i.e., the battery arrangement 100) will have the same absolute time, for example, with an accuracy better than 1 microsecond. The slave nodes have time slots that are scheduled to distribute information to the system. The slave nodes broadcast messages in the same way as the master nodes. For example, even all nodes in the system can obtain all information that is flowing in the network. The slave node responses can be scheduled so that three slave nodes (one in each string) have time to respond between each master transmission. For example, the current from each string with the same timestamp is available on the network, and the AC current of each millisecond can be analyzed based on the internal current sensor in the slave node.

[0080] Reference Figure 9 , which shows in a timeline the tasks of a master node and one or more slave nodes triggered and / or synchronized by an update event. Update events can occur at the aforementioned time interval T. Update events are the basis for all time-synchronized changes in the modulator. A master node message transmission is scheduled just after the update. Three slave node transmissions are then scheduled before the next master node transmission. For example, after an update event, some or all nodes in a battery arrangement can simultaneously measure the corresponding current. The master node can measure the resolver angle and can obtain or determine the current modulator angle.

[0081] Still refer to Figure 9 , explains the modulator, i.e., the virtual sine wave generated by the master node 150, in more detail. At each update event, the master node 150 can send the current modulator angle. The slave nodes (i.e., the battery cell controllers 120) can receive this angle, compare it with their own modulator angle, and calculate a correction if there is a deviation. This is done in Figure 9 Indicated by the rectangles representing the switch on time of the slave node or battery cell respectively, the virtual modulator voltage (angle) is adapted by changing the switch time. At the next switch on event, the offset of the corresponding slave node can be applied to the modulator timing once, so that the modulator remains synchronized because the absolute timing is synchronized. Note that Figure 9 The figure shows a system with only two slave nodes, which generates a sine wave with a fairly low resolution. It also shows the virtual sinusoidal voltage generated by the system. For a large number of slave nodes, the generated voltage will be very close to a true sinusoidal shape.

[0082] As described above, the virtual sine wave generated by the master node can also be called a modulator. The update event can be considered the basis for all time synchronization changes in the modulator. The master node message transmission is scheduled just after the update event. Then, as mentioned above Figure 8 As explained, three slave node transmissions are scheduled before the next master node transmission.

[0083] Other variations to the disclosed embodiments may be understood and implemented by those skilled in the art in practicing the claimed invention, by studying the drawings, the disclosure and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single processor or other unit may perform the functions of several items or steps listed in a claim. The fact that certain measures are listed in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. The computer program may be stored / distributed on a suitable medium, such as an optical storage medium or solid-state medium provided with or as part of other hardware, but may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunications systems. Any reference signs in the claims should not be construed as limiting the scope of the claim.

Claims

1. A battery arrangement for connection to a motor and / or a power source, comprising: a plurality of battery cells, wherein a first subnumber connected in series forms a first string, a second subnumber connected in series forms a second string, and a third subnumber connected in series forms a third string, the first string, the second string, and the third string being connectable as a respective phase to the motor; as well as a plurality of battery cell controllers forming a plurality of slave nodes, each battery cell controller being connected to at least one terminal of the plurality of battery cells within a string, each battery cell controller comprising a power electronics arrangement and a sensor configured to obtain at least one battery cell parameter; as well as a master node configured to be connected to each of the first string, the second string, and the third string, the master node further configured to obtain a total parameter of a corresponding one of the first string, the second string, and the third string; The battery arrangement is configured to mutually verify the acquired at least one battery cell parameter and the acquired overall parameter.

2. The battery arrangement according to claim 1 is further configured to mutually verify the at least one battery cell parameter obtained and the total parameter obtained by controlling only one slave node to be activated at a time and obtaining the at least one battery cell parameter of the corresponding activated slave node and / or battery cell.

3. The battery arrangement according to claim 2, further configured to activate each of the plurality of slave nodes one by one, obtain the corresponding at least one battery cell parameter, add them together, and then perform verification using the obtained total parameter.

4. The battery arrangement of claim 1 , the master node further configured to connect to each of the first, second, and third strings via a wireless communication interface or other galvanically isolated communication method. 5 . The battery arrangement of claim 1 , the plurality of slave nodes further configured to connect to the master node via a wireless communication interface or other galvanically isolated communication method.

6. The battery arrangement of claim 1, the plurality of slave nodes each having an assigned identifier to be identified and / or addressed by the master node.

7. The battery arrangement of claim 1, the plurality of slave nodes each having an assigned Media Access Control (MAC) address to be identified and / or addressed by the master node.

8. The battery arrangement of claim 1, the power electronics arrangement of each of the plurality of busbar cell connectors comprising an H-bridge including a plurality of power switches configured to selectively connect to a corresponding battery cell.

9. The battery arrangement according to any one of claims 1 to 8, further configured to mutually verify the acquired at least one battery cell parameter and the acquired overall parameter during a startup phase of the battery arrangement.

10. A vehicle comprising: Motor; as well as A battery arrangement according to any preceding claim, connected to the electric machine.

11. The vehicle of claim 10, further comprising a power interface, the battery arrangement being further connected to the power interface.

12. A method for controlling a battery arrangement comprising a plurality of battery cells, wherein a first subnumber of the battery cells connected in series form a first string, a second subnumber of the battery cells connected in series form a second string, and a third subnumber of the battery cells connected in series form a third string, the first string, the second string, and the third string being connectable to a motor as a respective phase, a plurality of battery cell controllers forming a plurality of slave nodes, each battery cell controller being connected to at least one terminal of the plurality of battery cells within a string and a master node, the method comprising: obtaining, by at least a portion of the plurality of battery cell controllers, at least one battery cell parameter; The master node obtains a total parameter of a corresponding one of the first string, the second string, and the third string; as well as The at least one battery cell parameter determined by the battery arrangement and the determined overall parameter are mutually verified.

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