Hybrid cell chemical in electrical drives

Abstract

The system may include a first group of energy storage systems including a first cell chemistry. The system may also include at least a second group of energy storage systems including a second cell chemistry that may be different than the first cell chemistry. The system may also include a power electronic converter that may connect the first group of energy storage systems and the at least second group of energy storage systems, and may act as a traction inverter to convert direct current (DC) power from the first group of energy storage systems and the at least second group of energy storage systems to alternating current (AC) power to drive a motor of the electric drive unit.

Description

Technical Field

[0001] The present disclosure relates to electric vehicle technology and, more particularly, to hybrid cell chemistries that can be employed in electric drives to generate electrical energy. Background Art

[0002] Electric drives are commonly used in electric vehicles, industrial machines, and appliances. They convert electrical energy from a power system or batteries into mechanical energy that can be used to generate motion. Most batteries typically consist of a single cell chemistry and cannot be optimized for different parameters, such as those used to improve the performance and / or efficiency of electric vehicles.

[0003] The above background is intended only to provide a contextual overview of electric drives and cell chemistries and is not intended to be exhaustive. Summary of the Invention

[0004] The following summary is presented to provide a basic understanding of one or more embodiments described herein. This summary is not intended to identify key or critical elements, delineate the scope of a particular embodiment, or the scope of the claims. Its sole purpose is to present concepts in a simplified form as a prelude to the more detailed description that is presented later. In one or more embodiments described herein, systems, methods, and / or devices for implementing electric drives with mixed cell chemistries are discussed.

[0005] According to one embodiment, a system is provided. The system may include a first energy storage system group, the first energy storage system group including a first battery cell chemistry that can be targeted at the energy density of the electric drive unit. The system may also include at least a second energy storage system group, the at least second energy storage system group including a second battery cell chemistry that can be different from the first battery cell chemistry and can be targeted at the power density of the electric drive unit. The system may also include a power electronic converter that can connect the first energy storage system group and the at least second energy storage system group and can act as a traction inverter to convert direct current (DC) power from the first energy storage system group and the at least second energy storage system group to alternating current (AC) power to drive a motor of the electric drive unit.

[0006] According to another embodiment, a method is provided. The method may include connecting a first energy storage system group and at least a second energy storage system group via a power electronic converter of an electric drive unit, the first energy storage system group including a first cell chemistry targeted for an energy density of the electric drive unit, and the at least second energy storage system group including a second cell chemistry that may be different from the first cell chemistry and targeted for a power density of the electric drive unit, wherein the power electronic converter may function as a traction inverter to convert DC power from the first energy storage system group and the at least second energy storage system group to AC power to drive a motor of the electric drive unit.

[0007] According to yet another embodiment, a system is provided. The system may include a first energy storage system group including a first battery cell chemistry that may be targeted for energy density of an electric vehicle. The electric vehicle may also include at least a second energy storage system group including a second battery cell chemistry that may be different from the first battery cell chemistry and may be targeted for power density of the electric vehicle. The electric vehicle may also include two or more power electronic converters that may serve as respective traction inverters to convert DC power from the first energy storage system group and the at least second energy storage system group to AC power to drive a motor of the electric vehicle, wherein the first energy storage system group and the at least second energy storage system group may be connected via the two or more power electronic converters. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] One or more embodiments are described below in the detailed description with reference to the following drawings:

[0009] Figure 1 A block diagram is shown of an exemplary non-limiting system that can generate electrical energy in an electric drive using a variety of different battery cell chemistries according to one or more embodiments described herein.

[0010] Figure 2 Schematic diagram illustrating exemplary non-limiting topologies of energy storage systems having different cell chemistries connected to an electric drive including an open-ended winding electric machine and two inverters, according to one or more embodiments described herein.

[0011] Figure 3 Another schematic diagram illustrates exemplary non-limiting topologies of energy storage systems having different cell chemistries connected to an electric drive including an open-ended winding motor and two inverters, according to one or more embodiments described herein.

[0012] Figure 4Schematic diagram illustrating exemplary non-limiting topologies of energy storage systems with different cell chemistries connected to an electric drive including a neutral point clamped (NPC) inverter and an electric motor according to one or more embodiments described herein.

[0013] Figure 5 Schematic diagram showing exemplary non-limiting topologies of energy storage systems with different cell chemistries connected to an electric drive including a cascaded H-bridge (CHB) converter and an electric motor according to one or more embodiments described herein.

[0014] Figure 6 A flow chart illustrating an exemplary non-limiting method for generating electrical energy in an electric drive using at least two different battery cell chemistries according to one or more embodiments described herein.

[0015] Figure 7 Another flow chart illustrating an exemplary non-limiting method for generating electrical energy in an electric drive using at least two different battery cell chemistries according to one or more embodiments described herein.

[0016] Figure 8 Depicted is an example schematic block diagram of a computing environment with which the disclosed subject matter can at least partially interact in accordance with various aspects and implementations of the subject disclosure.

[0017] Figure 9 is a block diagram representing an example computing environment in which aspects of the subject matter described herein may be incorporated. DETAILED DESCRIPTION

[0018] The following detailed description is merely illustrative and is not intended to limit the embodiments and / or the application or uses of the embodiments. In addition, there is no intention to be bound by any express or implied information presented in the above background or summary or detailed description.

[0019] One or more embodiments will now be described with reference to the accompanying drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a more thorough understanding of one or more embodiments. However, it will be apparent that in various circumstances, one or more embodiments may be practiced without these specific details.

[0020] definition:

[0021] Two-level inverter: The main function of the inverter is to convert DC to AC. A two-level inverter produces an AC output voltage that can take on two possible levels (usually positive and negative of the DC supply voltage), thus producing a staircase approximation of a sinusoidal waveform.

[0022] Multilevel inverter: A multilevel inverter is an advanced type of power electronic inverter designed to overcome some of the limitations of traditional two-level inverters, particularly in terms of harmonic distortion and voltage stress across the switching devices. Multilevel inverters generate output voltage waveforms that can exhibit more than two levels, typically achieving a closer approximation to a sinusoidal waveform. This capability allows for reduced harmonic distortion, lower electromagnetic interference (EMI), and the ability to operate at higher voltages with lower switching losses.

[0023] DC bus capacitors: DC bus capacitors are used to smooth out voltage fluctuations on the DC bus, thereby providing a stable voltage supply to the inverter. This is crucial during dynamic load conditions (such as acceleration and deceleration) where the demand on the power source changes rapidly.

[0024] Electric Machine: The electric machine in an electric vehicle plays a vital role in converting electrical energy into mechanical energy to propel the vehicle. These machines are electric motors, which can also act as generators during regenerative braking, capturing kinetic energy and converting it back into electrical energy to recharge the battery.

[0025] An electric drive includes an electric motor or motor and converts electrical energy from a power supply system or battery into mechanical energy that can be used to generate motion. Electric drives are commonly used in electric vehicles, industrial machines, and electrical appliances. Electric drives are typically connected to one or more batteries on an electric vehicle network. Specific contactors or specific DC-DC converters are used to interconnect the batteries and supply power to the electric drive from the batteries. The electric drive also uses a power electronics controller that can manage the flow of electrical energy delivered by the DC source and control the speed and torque of the motor. Therefore, multiple hardware components are used in the electric drive to interconnect different batteries, reduce the DC voltage, and control the amount of electrical energy delivered to the motor. In addition, electric drives typically obtain power from a single type of battery cell chemistry and cannot be optimized for different parameters.

[0026] Embodiments described herein include systems, methods, and apparatus that can include energy storage systems with different corresponding battery cell chemistries that can be used to generate electrical energy to drive the motor of an electric drive unit (or electric drive). The different corresponding battery cell chemistries can be primarily utilized via a traction inverter, but the traction inverter can also control the motor. For example, different energy storage systems can be interconnected via a power electronic converter that can also serve as a traction inverter to convert DC power from the energy storage system into AC power to drive and control the motor without the need for additional components. More specifically, embodiments described herein relate to electric drive designs that can combine at least two different battery cell chemistries within two corresponding electrically isolated energy storage systems. Such electric drives can be used within electric vehicles to enhance the overall performance, drivability, and efficiency of the electric vehicle. For example, an electric drive unit can include two or more energy storage systems that utilize different corresponding battery cell chemistries that can be tailored to specific driving conditions. In addition, the two or more energy storage systems can be electrically isolated from each other to ensure independent management of the two or more energy storage systems for optimal operation. Power electronic converters can also be used to connect two or more energy storage systems in an electric vehicle (while maintaining electrical isolation between the two or more energy storage systems). The power electronic converter can have the additional function of acting as a power electronic inverter or traction inverter for the electric vehicle. Such an electric drive can also be used in industrial machines or other electromechanical systems. As described above, the electric drive is typically connected to one or more batteries on the electric vehicle network, and specific contactors or specific DC-DC converters are used to interconnect the batteries and supply power from the batteries to the electric drive. An embodiment of the present disclosure provides an electric drive that includes more than one type of power input (for example, batteries with different cell chemistries or other types of energy storage systems), and multiple power inputs in the electric drive can be directly interconnected without the need for any additional electronic components between the power inputs.

[0027] Typically, an electric drive unit can employ multiple energy storage systems with different corresponding characteristics, behaviors, and chemistries, which can allow the electric drive unit to be optimized for different parameters. For example, a first battery cell chemistry may be more suitable for producing a higher energy density in the electric drive unit, a second battery cell chemistry may be more suitable for producing a higher power density in the electric drive unit, and so on. In an electric vehicle, a higher energy density can lead to a longer range for the electric vehicle, a higher power density can lead to better performance for the vehicle, and so on. Therefore, the electric drive unit can be used to optimize various parameters of a larger system. In various embodiments, different battery cell chemistries can also lead to different corresponding charge and load curves for the energy storage system. In this regard, the energy storage system can be optimized for faster charging, longer life, etc. In various embodiments, the different chemistries can be selected from Nickel Manganese Cobalt (NMC) chemistry, Lithium Iron Phosphate (LFP) chemistry, Lithium Cobalt Oxide (LCO) chemistry, or another type of battery cell chemistry. The energy storage system can be a battery, a fuel cell, a supercapacitor, or other type of energy storage system. As described above, the power electronic converter can be connected to different energy storage systems and function as a traction inverter, and the power electronic converter can have different topologies. For example, the power electronic converter can have a two-level or multi-level inverter topology that can be combined with an open-ended winding machine, and the traction inverter can be an NPC inverter, etc. In various embodiments, the power electronics within the power electronic converter can select different energy storage systems to drive the motor. For example, based on the parameters to be enhanced, the power electronics within the power electronic converter can select different energy storage systems to drive the motor at different times or operating periods of the electric drive unit.

[0028] The embodiments depicted in one or more figures described herein are for illustration only, and thus, the architecture of the embodiments is not limited to the systems, devices, and / or components depicted therein, nor to any specific order, connection, and / or coupling of the systems, devices, and / or components depicted therein. For example, in one or more embodiments, the non-limiting systems described herein (such as Figure 1 The non-limiting system 100 shown here and / or its system) may also include the operating environment (such as Figure 8 One or more computers and / or computing-based elements described in the operating environment 800 shown in FIG. 1 may be associated, interacted, and / or coupled. In one or more of the described embodiments, the computers and / or computing-based elements may be combined to implement the combined Figure 1and / or used in combination with one or more of the computer-implemented operations shown and / or described in other figures described herein.

[0029] Figure 1 A block diagram is shown of an exemplary non-limiting system 100 that can generate electrical energy in an electric drive using a variety of different battery cell chemistries, according to one or more embodiments described herein.

[0030] The non-limiting system 100 can be used to solve problems (e.g., related to electric vehicles, electric drives, hybrid battery chemistries, etc.) that are highly technical in nature and are not abstract and cannot be performed by a human as a set of mental actions. Furthermore, some of the processes performed by the non-limiting system 100 can be executed to perform defined tasks related to generating electrical energy via an electric drive using hybrid battery chemistries. The non-limiting system 100 can be used to solve new problems that arise due to advances in the aforementioned technologies, etc. The non-limiting system 100 can provide technical improvements to electric drives by increasing their performance efficiency, reducing the number of components employed in the electric drive, and employing a variety of battery chemistries tailored to different performance parameters of the electric drive. By employing such an electric drive in an electric vehicle, the non-limiting system 100 can provide additional improvements by allowing for flexible system designs for the electric vehicle, allowing the electric vehicle to incorporate multiple smaller batteries with various battery chemistries rather than a single large battery with a single battery chemistry. Such an embodiment can provide advantages in terms of physical space constraints within the electric vehicle and in terms of enhancing the different performance parameters of the electric vehicle by controlling the energy storage system via control software.

[0031] In various embodiments, non-limiting system 100 may include an energy storage system group 104 (e.g., a first energy storage system group). In various embodiments, energy storage system group 104 may include one or more energy storage systems, and each energy storage system may include multiple cells containing a first cell chemistry. That is, each cell within each energy storage system within energy storage system group 104 may contain only the first type of cell chemistry. It should be understood that each cell within a single energy storage system within non-limiting system 100 may include the same cell chemistry, as employing cells with different chemistries within a single energy storage system may cause the different chemistries to react with each other, which may be undesirable. In some embodiments, each energy storage system within energy storage system group 104 may be a battery / battery pack. In other embodiments, each energy storage system may be a fuel cell, an ultracapacitor, or another type of energy storage system now known or developed in the future. In various embodiments, the first cell chemistry may be an NMC chemistry, an LFP chemistry, an LCO chemistry, or another type of cell chemistry. In some embodiments, the first cell chemistry may be selected to target the energy density of electric drive unit 102.

[0032] In various embodiments, the non-limiting system 100 may also include an energy storage system group 106. In various embodiments, the energy storage system group 106 (e.g., a second energy storage system group) may include one or more energy storage systems, and each energy storage system may include multiple cells that include a second cell chemistry that may be different from the first cell chemistry. That is, the individual cells in each energy storage system of the energy storage system group 106 may only include the second type of cell chemistry. In some embodiments, the individual energy storage systems in the energy storage system group 106 may be batteries / battery packs. In other embodiments, the individual energy storage systems may be fuel cells, supercapacitors, or other types of energy storage systems now known or developed in the future. In various embodiments, the second cell chemistry may be an NMC chemistry, an LFP chemistry, an LCO chemistry, or another type of cell chemistry. In some embodiments, the second cell chemistry may be selected so that the second cell chemistry can be targeted to the power density of the electric drive unit 102.

[0033] In various embodiments, the respective energy storage systems in energy storage system group 104 may have a first packaging type, and the respective energy storage systems in energy storage system group 106 may have a second packaging type different from the first packaging type. Such embodiments of the present disclosure can provide an efficient packaging solution for systems with mixed cell chemistries by allowing two or more different energy storage systems to have different respective packaging sizes and formats. Furthermore, in various embodiments, the respective energy storage systems in energy storage system group 104 and energy storage system group 106 can have different voltage levels and different lifespans. Due to the first and second cell chemistries, the respective energy storage systems in energy storage system group 104 and energy storage system group 106 can also charge at different respective charging rates and discharge at different respective discharging rates. In various embodiments, the first cell chemistry can generate a first charge curve and a first load curve, and the second cell chemistry can generate a second charge curve and a second load curve. The second charge curve can be different from the first charge curve, and the second load curve can be different from the first load curve. The load curve can refer to a discharge curve, as discharging the energy storage system can place a load on the energy storage system. Generally, energy storage system group 104 and energy storage system group 106 may have different respective designs / forms and characteristics. Therefore, energy storage system group 104 and energy storage system group 106 may each be targeted at different performance parameters of electric drive unit 102 .

[0034] Embodiments of the present disclosure in which the respective energy storage systems of the non-limiting system 100 can be charged at different respective charging speeds can provide the non-limiting system 100 with a fast DC charging capability such that one energy storage system (e.g., in the energy storage system group 104 and the energy storage system group 106) can be charged faster than another energy storage system (e.g., in the energy storage system group 104 and the energy storage system group 106). This capability can be beneficial in situations where charging time is limited. Embodiments of the present disclosure in which the respective energy storage systems of the non-limiting system 100 can have different voltage levels / asymmetric voltage levels can make the non-limiting system 100 more suitable for high voltage system designs. In such embodiments, different energy storage systems can have different voltage levels depending on the open circuit voltage (OCV) of energy storage systems having the same number of cells. The OCV of an energy storage system can be defined as the voltage of the energy storage system when the energy storage system is not connected to any load.

[0035] In some embodiments, the non-limiting system 100 can be employed in an electric vehicle, where a first cell chemistry can be targeted at the energy density of the electric drive unit 102 to increase the range of the electric vehicle, and a second cell chemistry can be targeted at the power density of the electric drive unit 102 to improve the performance of the electric vehicle. For example, the energy storage system group 104 can include high-energy-density cells that can be designed (via a first cell chemistry) for long-range driving, and such cells can prioritize energy density, for example, over other parameters, to extend the overall range of the electric vehicle. Such cells may be ideal for highway or continuous driving scenarios. Similarly, the energy storage system group 106 can include high-power-density cells that can be tailored for situations requiring rapid acceleration and deceleration (via a second cell chemistry), and such cells can provide enhanced power output. Such cells may be ideal for stop-and-go urban driving conditions, highways, and / or performing rapid acceleration or regeneration of the electric vehicle. In general, a multi-cell chemistry approach can maximize the range of the electric vehicle by leveraging the strengths of each type of cell chemistry. Additionally, in various embodiments, the combination of energy storage system group 104 and energy storage system group 106 can implement redundancy in the non-limiting system 100. For example, the combination of energy storage system group 104 and energy storage system group 106 can prevent a loss of propulsion in an electric vehicle due to the loss of one type of energy storage system. For example, in the event of a failure in one energy storage system or the loss of one battery pack due to a failure in one battery cell, the non-limiting system 100 can continue to generate energy to propel the electric vehicle. Furthermore, the combination of different cell chemistries can allow for the use of multiple smaller battery packs in electric vehicles where large batteries cannot be used due to physical space constraints.

[0036] In various embodiments, energy storage system group 104 and energy storage system group 106 can be connected via power electronic converters 110. However, the individual energy storage systems in energy storage system group 104 and energy storage system group 106 can remain electrically isolated from each other. This electrical isolation can ensure independent management of the individual energy storage systems in energy storage system group 104 and energy storage system group 106 to control the respective amounts of power drawn from the individual energy storage systems in energy storage system group 104 and energy storage system group 106. In various embodiments, the independent management can be performed via a control system (not shown) of power electronic converters 110. In other words, the independent management of how power can be drawn from each energy storage system of non-limiting system 100 can be regulated by the control system of the inverters (i.e., power electronic converters 110) that can interconnect the respective energy storage systems of non-limiting system 100. This electrical isolation can also prevent currents from rotating in the non-limiting system 100, such as common-mode currents associated with open-ended winding configurations or circulating currents flowing between cells of an MMC converter that can rotate in the non-limiting system 100. Thus, the various energy storage systems of the non-limiting system 100 can be interconnected via the power electronic converter 110 while remaining electrically isolated from each other. Figure 2 An example of galvanic isolation of an energy storage system is shown in , which shows an open-ended winding motor connected to two different inverters, where each inverter is connected to an energy storage system having a different cell chemistry than the other. Figure 2 In the event of any failure in one inverter, the non-limiting system 100 can continue to operate via the other inverter. Thus, electrical isolation of the various energy storage systems can have multiple benefits.

[0037] In various embodiments, motor 112 may be an electric motor (or electric machine). In various embodiments, power electronic converter 110 may select energy storage system group 104 or energy storage system group 106 to generate electrical energy to drive motor 112. For example, power electronic converter 110 may be controlled via software to select energy storage system group 104 or energy storage system group 106 to generate electrical energy to drive motor 112. In one or more embodiments, each energy storage system of non-limiting system 100 may be individually controlled via software. Furthermore, the amount of energy extracted from each energy storage system may also be controlled. For example, in an embodiment in which non-limiting system 100 may be employed in an electric vehicle, the entity operating the electric vehicle (e.g., hardware, software, AI, neural network, machine, and / or user) may select one or more specific batteries to engage at any point during the drive based on the ultimate goal during the drive. For example, a battery may be selected for energy density to increase the range of the electric vehicle, and after a period of time, a battery may be selected for power density to increase the performance of the electric vehicle, e.g., in terms of acceleration or other performance parameters.

[0038] In various embodiments, the power electronic converter 110 can function as a traction inverter to convert DC power from the energy storage system group 104 and the energy storage system group 106 into AC power to drive the motor 112. That is, the power electronic converter 110 can utilize different energy sources of the non-limiting system 100 to drive the motor 112 and simultaneously control the motor 112 (e.g., by managing the flow of electrical energy and controlling the speed and torque generated by the motor 112), rather than simply controlling the motor 112. Furthermore, the power electronic converter 110 can be used alone without additional components. This can be achieved by employing a multilevel converter as the power electronic converter 110. In this regard, the power electronic converter 110 can be both a converter and a DC-to-AC inverter with more than one energy source. Due to the unique charge and load profiles of the energy storage system group 104 and the energy storage system group 106, interconnecting the energy storage system group 104 and the energy storage system group 106 can be challenging. However, as described above, the power electronic converter 110 can also interconnect the energy storage system group 104 and the energy storage system group 106. Depending on the motor 112, in some embodiments, the non-limiting system 100 may include two or more power electronic converters with separate energy sources, as described below. Thus, in some embodiments discussed herein, Figure 1 The power electronic converter 110 shown in FIG. 1 may represent two or more inverters coupled to respective energy sources.

[0039] As described above, in various embodiments, the power electronic converter 110 can have a two-level topology or a multi-level topology with n levels, where n≥3, and the multi-level topology can be selected based on the type of motor 112 employed by the non-limiting system 100. For example, the power electronic converter 110 can be a flying capacitor inverter, an NPC inverter, an active neutral point clamped (ANPC) inverter, a T-type NPC inverter, an MMC inverter, a CHB inverter, a multi-source inverter, or other suitable inverter types. In some embodiments, the motor 112 can be an open-ended winding motor coupled to two inverters connected to each end of the winding of the motor 112, and the power electronic converter 110 can represent two inverters. In this regard, the electric drive unit 102 can represent a combination of the power electronic converter 110 and the motor 112. Some of the topologies listed herein are explained in more detail below with reference to subsequent figures. In various embodiments, the power electronic converter 110 may have only one type of topology (e.g., NPC, T-type NPC, ANPC, MMC, CHB, or another type of topology). However, a single motor, such as the motor 112, may be compatible with different types of inverter topologies. In various embodiments, multiple electric drive units 102 having different corresponding topologies for the power electronic converter 110 may be combined in a larger system. For example, an electric vehicle may have a motor coupled to an NPC inverter at the front of the electric vehicle and a motor coupled to a CHB converter at the rear of the electric vehicle. Typically, the electric drive of an electric vehicle may include only one type of inverter topology, and the electric vehicle may include additional electric drives with different inverter topologies. Thus, different inverter topologies may be combined in a single system (e.g., an electric vehicle).

[0040] In one embodiment, non-limiting system 100 may additionally include an energy storage system group 108. Energy storage system group 108 may include one or more energy storage systems, which may be connected to each other, to energy storage system group 104, and to energy storage system group 106 via power electronic converters 110. Each energy storage system in energy storage system group 108 may remain electrically isolated from each other, from energy storage system group 104, and from energy storage system group 106. In various embodiments, the one or more additional energy storage systems may each include one or more cell chemistries that may be different from each other, from the first cell chemistry, and from the second cell chemistry. In various embodiments, the one or more cell chemistries may be selected from the group consisting of an NMC chemistry, an LFP chemistry, an LCO chemistry, or another type of cell chemistry. Furthermore, the one or more cell chemistries may each be optimized for different performance parameters of electric drive unit 102. For example, the one or more cell chemistries may be optimized for specific driving conditions of an electric vehicle. It should be understood that in addition to electric vehicles, non-limiting system 100 may also be used in industrial machines or other electromechanical systems.

[0041] In some embodiments, each energy storage system in energy storage system group 108 may be a battery / battery pack. In other embodiments, each energy storage system may be a fuel cell, ultracapacitor, or other type of energy storage system now known or developed in the future. In various embodiments, the respective energy storage systems in energy storage system group 108 may have different respective packaging types. By allowing two or more different energy storage systems to have different respective packaging sizes and formats, such embodiments of the present disclosure can provide an efficient packaging solution for systems with mixed cell chemistries. Furthermore, in various embodiments, the respective energy storage systems in energy storage system group 108 may have different voltage levels, different lifespans, and may charge and discharge at different rates. In general, the respective energy storage systems in energy storage system group 108 may have different respective designs / formats and characteristics. Mixed cell chemistries can increase cell chemistry availability in non-limiting system 100, allowing energy storage systems of one type to be substituted with another type if insufficient.

[0042] Figure 2 A schematic diagram illustrates an exemplary, non-limiting topology 200 of an energy storage system having different cell chemistries connected to an electric drive including an open-ended winding motor and two inverters, according to one or more embodiments described herein. For the sake of brevity, repeated descriptions of similar elements and / or processes employed in corresponding embodiments are omitted.

[0043] As reference Figure 1 As discussed, in various embodiments, the electric drive unit 102 may include a power electronic converter 110 and a motor 112 (or electric machine). In various embodiments, the power electronic converter 110 may function as a traction inverter to convert DC power from the energy storage system group 104 and the energy storage system group 106 into AC power to drive the motor 112. That is, the power electronic converter 110 may utilize different energy sources from different energy storage systems of the non-limiting system 100 to drive the motor 112 and simultaneously control the motor 112, rather than simply controlling the motor 112. In addition, the power electronic converter 110 may be used alone without the need for additional components. This may be achieved by employing a multi-level converter as the power electronic converter 110. For example, the power electronic converter 110 may have a two-level topology or a multi-level topology having n levels, where n ≥ 3, and the multi-level topology may be selected based on the type of electric machine 112 employed by the non-limiting system 100. For example, the power electronic converter 110 may be a flying capacitor inverter, an NPC inverter, an ANPC inverter, a T-type NPC inverter, an MMC, a CHB inverter, a multi-source inverter, or another type of suitable inverter.

[0044] In some embodiments, the motor 112 may be an open-ended winding motor, and the power electronic converter 110 may represent two multilevel inverters connected to each end of the windings of the motor 112. For example, the motor 210 may be an open-ended winding motor connected to the inverter 220 and the inverter 222 shown within the dashed box. An open-ended winding motor is a motor with open windings and does not have a Y point, which is the neutral point of a three-phase circuit. Thus, the motor 210 may be a three-phase motor, and the motor 210 may be connected to the three-phase output of the inverter 220 on one side and to the three-phase output of the inverter 222 on the other side. Figure 2 , the windings corresponding to the respective phases of the motor 210 are shown by three rows of scallop patterns, and the symbol “L a,b,c " may represent the three-phase inductance of the motor 210. An open-ended winding motor such as the motor 210 may only have two terminals and therefore may only be connected to two inverters. However, other topologies for the power electronic converter 110 may have additional inverters. For example, other topologies for the power electronic converter may include multiple converter modules (e.g., MMC or CHB converters), wherein the respective converter modules may be separate complex inverter topologies including respective energy storage systems.

[0045] Energy storage system 202 having a first type of cell chemistry can be connected to the positive, negative, or terminal of inverter 220, and energy storage system 212 having a second type of cell chemistry can be connected to the positive, negative, or terminal of inverter 222. Energy storage system 202 can be electrically isolated from energy storage system 212. In various embodiments, the second type of cell chemistry can be different from the first type of cell chemistry. In various embodiments, the first type of cell chemistry and the second type of cell chemistry can be any of NMC, LFP, LCO, or another type of cell chemistry. Inverter 220 can convert DC power from energy storage system 202 to AC power to drive motor 210, and inverter 222 can convert DC power from energy storage system 212 to AC power to drive motor 210. By combining energy storage systems having different cell chemistries with an open-ended winding motor, electric drive unit 102 can be optimized and made more efficient.

[0046] Inverter 220 may include a DC bus capacitor 208. The DC bus capacitor 208 may smooth out voltage fluctuations on the DC bus, thereby providing a stable voltage supply to inverter 220, which may be critical during dynamic load conditions (such as acceleration and deceleration) where demands on the power source (e.g., energy storage system 202) can change rapidly. Inverter 220 may also include six switches 204 and diodes 206. Switches 204 may be transistors, such as metal oxide semiconductor field effect transistors (MOSFETs), insulated gate bipolar transistors (IGBTs), or another type of transistor now known or developed in the future. Diodes 206 may be semiconductor diodes. Inverter 222 may have a similar layout to DC bus capacitor 218, switches 214, and diodes 216.

[0047] Figure 3 A schematic diagram illustrates an exemplary, non-limiting topology 300 of an energy storage system having different cell chemistries connected to an electric drive including an open-ended winding motor and two inverters, according to one or more embodiments described herein. For the sake of brevity, repeated descriptions of similar elements and / or processes employed in corresponding embodiments are omitted.

[0048] Non-limiting topology 300 illustrates a portion of non-limiting topology 200 having energy storage system 202, inverter 220, and motor 210. As described above, inverter 220 and inverter 222 can be multi-level inverters. For example, inverter 220 can have three levels, each including two switches 204 and two diodes 206. Each level of inverter 220 can represent a phase of inverter 220, such that inverter 220 can generate a three-phase output, and motor 210 can be connected to the three-phase output of inverter 220 on one side. The connections between the respective phases of inverter 220 and motor 210 are illustrated by connections 302, 304, and 306. Motor 210 can be similarly connected to the three-phase output of inverter 222 on the other side, and motor 210 can be driven by energy storage system 202 and energy storage system 212.

[0049] Figure 4 A schematic diagram illustrates an exemplary, non-limiting topology 400 of an energy storage system having different cell chemistries connected to an electric drive including an NPC inverter and an electric motor, according to one or more embodiments described herein. For the sake of brevity, repeated descriptions of similar elements and / or processes employed in corresponding embodiments are omitted.

[0050] As reference Figure 1 As discussed, in various embodiments, the electric drive unit 102 may include a power electronic converter 110 and a motor 112 (or electric machine). In various embodiments, the power electronic converter 110 may function as a traction inverter to convert DC power from the energy storage system group 104 and the energy storage system group 106 into AC power to drive the motor 112. That is, the power electronic converter 110 may utilize different energy sources from different energy storage systems of the non-limiting system 100 to drive the motor 112 and simultaneously control the motor 112, rather than simply controlling the motor 112. In addition, the power electronic converter 110 may be used alone without the need for additional components. This may be achieved by employing a multi-level converter as the power electronic converter 110. For example, the power electronic converter 110 may have a two-level topology or a multi-level topology having n levels, where n ≥ 3, and the multi-level topology may be selected based on the type of electric machine 112 employed by the non-limiting system 100. For example, the power electronic converter 110 may be a flying capacitor inverter, an NPC inverter, an ANPC inverter, a T-type NPC inverter, an MMC, a CHB inverter, a multi-source inverter, or another suitable type of inverter. In some embodiments, the motor 112 may be an open-ended winding motor, and the power electronic converter 110 may represent two multi-level inverters connected to each end of the winding of the motor 112.

[0051] In some embodiments, motor 112 may be an electric motor, and power electronic converter 110 may be an NPC inverter coupled to motor 112. That is, motor 410 may be coupled to inverter 416, and inverter 416 may be an NPC inverter. Motor 410 may be a three-phase motor, and motor 410 may be connected to the three-phase output of inverter 416. Figure 4 In the symbol "L a,b,c ” may represent the three-phase inductance of motor 410. Inverter 416 may be further coupled to energy storage system 402 having a first type of cell chemistry and energy storage system 412 having a second type of cell chemistry different from the first type of cell chemistry. Energy storage system 402 may be electrically isolated from energy storage system 412. Inverter 416 may include DC bus capacitor 408 and DC bus capacitor 414. The DC bus capacitor may smooth out voltage fluctuations on the DC bus, thereby providing a stable voltage supply to the inverter, which may be critical during dynamic load conditions (such as acceleration and deceleration) where power requirements can change rapidly. Inverter 416 may also include switch 404 and diode 406. Switch 404 may be a transistor, such as a MOSFET, an IGBT, or another type of transistor now known or developed in the future. Diode 406 may be a semiconductor diode. Inverter 4 16 can be a multi-level inverter having n levels, where n ≥ 3, and each level of the inverter 416 can include four switches 404 and six diodes 406. For example, the non-limiting topology 400 corresponds to a three-level topology, and the inverter 416 is shown as a three-level inverter (n = 3), which can mean that the inverter 416 can take two DC inputs, one from the energy storage system 402 and the other from the energy storage system 412. However, the NPC inverter topology can be extended to more levels. For example, in one or more embodiments, the inverter 416 can have additional levels (n>3). For example, the inverter 416 can have five levels, which can mean that the inverter 416 can take four DC inputs with different corresponding battery cell chemistries. In general, an n-level NPC inverter can have (n-1) DC inputs, or in other words, an n-level NPC inverter can take (n-1) batteries.

[0052] In various embodiments, the inverter 416 can be controlled via software to select a particular energy storage system to draw energy from to the motor 410. For example, the control software can be implemented in the non-limiting system 100 so that an entity (e.g., hardware, software, AI, neural network, machine, and / or user) can select the energy storage system 402, the energy storage system 412, and / or another energy storage system (e.g., in an n-level NPC inverter) to power the motor 410 via another system directly or indirectly coupled to the non-limiting system 100. In some embodiments, the control software can also be configured to control the amount of energy drawn from the particular energy storage system selected by the entity. For example, the energy storage system 402 can be controlled to deliver more power than the energy storage system 412. This concept is not limited to the NPC inverter topology and can be applied to other topologies of the power electronic converter 110.

[0053] As described above, the inverter 416 can be a multi-level NPC inverter. For example, the inverter 416 can have three levels, each level including four switches 204 and six diodes 206. Each level of the inverter 416 can represent a phase of the inverter 416, so that the inverter 416 can generate a three-phase output via the energy storage system 402 and the energy storage system 412, and the motor 410 can be connected to the three-phase output of the inverter 416. The connection between the inverter 416 and the motor 410 is Figure 4 Connections 418, 420, and 422 are shown in FIG.

[0054] In some embodiments, the power electronic converter 110 may be a flying capacitor inverter, an ANPC inverter, a T-type NPC inverter, a CHB inverter, a multi-source inverter, or an MMC inverter. For example, in some embodiments, the motor 112 may be an electric motor, and the power electronic converter 110 may represent an MMC coupled to the motor 112. The MMC may be further coupled to energy storage systems 402 and 412 having different corresponding cell chemistries. For example, the energy storage systems 402 and 412 may be coupled to MMC boards. The MMC boards may include different power switches, electronics, etc., and the MMC may convert DC power from the energy storage systems 402 and 412 into AC power capable of powering the motor 112. In some embodiments, the power electronic converter 110 may be an MMC coupled to one or more additional energy storage systems having different corresponding cell chemistries. For example, the power electronic converter 110 may be coupled to an energy storage system including a third type of cell chemistry that may be different from the first type of cell chemistry and the second type of cell chemistry. In this regard, the number of energy storage systems may be incremented by any integer value.

[0055] By combining different cell chemistries with the MMC (or another type of inverter), the design of the non-limiting system 100 can be made more flexible. Furthermore, the various energy storage systems can be electrically isolated from one another to prevent current from circulating in the non-limiting system 100 and ensure independent management of the various energy storage systems to control the amount of power drawn from the respective energy storage systems, wherein the independent management can be performed via a control system (not shown) of the power electronic converter 110. For example, in various embodiments, the control system of the MMC can be controlled via software to select an energy storage system to draw energy from to the motor 112. For example, the control software can be implemented in the non-limiting system 100 so that an entity (e.g., hardware, software, AI, a neural network, a machine, and / or a user) can select energy storage system 402, energy storage system 412, and / or another energy storage system to power the motor 112 via another system directly or indirectly coupled to the non-limiting system 100. The control software can also be configured to control the amount of energy drawn from a particular energy storage system selected by the entity. For example, energy storage system 402 may be controlled to deliver more power than energy storage system 412 .

[0056] Figure 5 A schematic diagram of an exemplary non-limiting topology 500 of an energy storage system having different cell chemistries connected to an electric drive including a CHB converter and an electric motor according to one or more embodiments described herein is shown. For the sake of brevity, repeated descriptions of similar elements and / or processes employed in the corresponding embodiments are omitted.

[0057] As reference Figure 1As discussed, in various embodiments, the electric drive unit 102 may include a power electronic converter 110 and a motor 112 (or electric machine). In various embodiments, the power electronic converter 110 may function as a traction inverter to convert DC power from the energy storage system group 104 and the energy storage system group 106 into AC power to drive the motor 112. That is, the power electronic converter 110 may utilize different energy sources from different energy storage systems of the non-limiting system 100 to drive the motor 112 and simultaneously control the motor 112, rather than simply controlling the motor 112. In addition, the power electronic converter 110 may be used alone without the need for additional components. This may be achieved by employing a multi-level converter as the power electronic converter 110. For example, the power electronic converter 110 may have a two-level topology or a multi-level topology having n levels, where n ≥ 3, and the multi-level topology may be selected based on the type of electric machine 112 employed by the non-limiting system 100. For example, the power electronic converter 110 may be a flying capacitor inverter, an NPC inverter, an ANPC inverter, a T-type NPC inverter, an MMC, a CHB inverter, a multi-source inverter, or another type of suitable inverter. In one or more embodiments, two or more power electronic converters (such as the power electronic converter 110) may be used as respective traction inverters to convert DC power from the first energy storage system group and the second energy storage system group into AC power to drive the motor of the electric vehicle. For example, in some embodiments, the motor 112 may be an open-ended winding motor, and the power electronic converter 110 may represent two multi-level inverters connected to each end of the winding of the motor 112.

[0058] In some embodiments, motor 112 may be an electric machine, and power electronic converter 110 may represent multiple CHB converters coupled to motor 112, such that each phase of power electronic converter 110 may include two or more CHB converters. In some embodiments, motor 510 may be a three-phase electric machine that may be coupled to a three-phase output generated by power electronic converter 110. For example, connection 508 may illustrate the first phase of power electronic converter 110, connection 514 may illustrate the second phase of power electronic converter 110, and connection 516 may illustrate the third phase of power electronic converter 110. In other embodiments, multiple CHB converters may be distributed across more than three phases. Therefore, the number of phases of the CHB-based topology of power electronic converter 110 is not limited to three.

[0059] Each of the multiple CHB converters can be coupled to an energy storage system having a different corresponding cell chemistry. For example, energy storage system 502 can include a first type of cell chemistry (cell type 1), and energy storage system 504 can include a second type of cell chemistry (cell type 2), which can be different from the first type of cell chemistry. In various embodiments, power electronic converter 110 can include one or more additional energy storage systems, such as energy storage system 506 (cell type N), which includes a third type of cell chemistry that can be different from the first and second types of cell chemistry. Energy storage system 502 can be coupled to a first CHB converter, energy storage system 504 can be coupled to a second CHB converter, energy storage system 506 can be coupled to a third CHB converter, and so on, and this pattern can be repeated for different phases of power electronic converter 110, as shown by non-limiting topology 500. Each CHB converter can convert DC power from a corresponding energy storage system into AC power that can power motor 510. In various embodiments, any combination of different cell chemistries can be implemented using CHB converters. By combining different cell chemistries with a CHB converter, the design of the non-limiting system 100 can be made more flexible. A full-bridge configuration of a single CHB converter is shown at 512. While the full-bridge configuration may be the most common configuration for a CHB converter, such a separate module (shown at 512) may include any type of inverter.

[0060] In various embodiments, multiple CHB converters can be individually controlled via software to select a specific energy storage system to draw energy from to the motor 510. For example, control software can be implemented in the non-limiting system 100 so that an entity (e.g., hardware, software, AI, neural network, machine, and / or user) can select energy storage system 502, energy storage system 504, energy storage system 506, and / or another energy storage system to power the motor 510 via another system directly or indirectly coupled to the non-limiting system 100. The control software can also be configured to control the amount of energy drawn from the specific energy storage system selected by the entity. For example, the entity can select energy storage system 504 to deliver more power than energy storage system 502.

[0061] Figure 6 A flow chart illustrating an exemplary non-limiting method 600 for generating electrical energy in an electric drive using at least two different battery cell chemistries according to one or more embodiments described herein is shown. For the sake of brevity, repeated descriptions of similar elements and / or processes employed in corresponding embodiments are omitted.

[0062] At 602, non-limiting method 600 may include connecting a first energy storage system group and at least a second energy storage system group via a power electronic converter of an electric drive unit, the first energy storage system group including a first battery cell chemistry targeted at an energy density of the electric drive unit, and at least the second energy storage system group including a second battery cell chemistry that may be different from the first battery cell chemistry and may be targeted at a power density of the electric drive unit, wherein the power electronic converter may act as a traction inverter to convert DC power from the first energy storage system group and the at least second energy storage system group to AC power to drive a motor of the electric drive unit.

[0063] At 604, the non-limiting method 600 may include electrically isolating the first energy storage system group from at least the second energy storage system group to ensure independent management of the first energy storage system group and the at least second energy storage system group to control the respective amounts of electrical power drawn from the first energy storage system group and the at least second energy storage system group, wherein the independent management is performed via a control system of the power electronic converter.

[0064] Figure 7 A flow chart illustrating an exemplary non-limiting method 700 for generating electrical energy in an electric drive using at least two different battery cell chemistries according to one or more embodiments described herein is provided. For the sake of brevity, repeated descriptions of similar elements and / or processes employed in the corresponding embodiments are omitted.

[0065] The non-limiting method 700 may correspond to additional aspects of the non-limiting system 100. It should be understood that the non-limiting system 100 and the non-limiting method 700 are not limited by the aspects disclosed herein.

[0066] At 702, non-limiting method 700 may include determining, by an entity (e.g., hardware, software, AI, neural network, machine, and / or user), whether to optimize the electric drive unit for energy density or power density. Based on the determination by the entity, the power electronic converter may select the first energy storage system group or the second energy storage system group to power the motor.

[0067] For example, at 704, non-limiting method 700 may include selecting, by the power electronic converter, a first energy storage system group to generate electrical energy to drive the motor if the electric drive unit is to be optimized for energy density. For example, the first energy storage system group may include a first battery cell chemistry that may be optimized for energy density of the electric drive unit, and selecting the first energy storage system group to drive the motor may optimize the electric drive unit for energy density.

[0068] Likewise, at 706 , non-limiting method 700 may include selecting, by the power electronic converter, a second energy storage system group to generate electrical energy to drive the motor if the electric drive unit is to be optimized for power density. For example, the second energy storage system group may include a second battery cell chemistry that may be optimized for the power density of the electric drive unit, and selecting the second energy storage system group to drive the motor may optimize the electric drive unit for power density.

[0069] For simplicity of explanation, the method provided herein is depicted and / or described as a series of actions. It should be understood that the present invention is not limited by the actions shown and / or the order of actions, for example, the actions can occur in one or more sequences and / or simultaneously, and occur together with other actions not presented and described herein. In addition, not all actions shown can be used to implement the method according to the described theme. In addition, the computer-implemented methods described hereinafter and / or throughout the specification can be stored on articles of manufacture so that the computer-implemented methods can be transmitted and transferred to a computer. As used herein, the term article of manufacture is intended to encompass computer programs accessible from any computer-readable device or storage medium.

[0070] This paper has (and / or will further) described a system and / or device with respect to the interaction between one or more components. Such a system and / or component may include those components or subcomponents, one or more specified components and / or subcomponents and / or additional components specified therein. Subcomponents may be implemented as components coupled to other components rather than being included in a parent component. One or more components and / or subcomponents may be combined into a single component that provides aggregation functionality. For the sake of brevity, these components may interact with one or more other components not specifically described herein but known to those skilled in the art.

[0071] Next go to Figure 8 and Figure 9 , which provides references for this article Figures 1-9 A detailed description of additional context for one or more embodiments described.

[0072] To provide context for various aspects of the disclosed subject matter, Figure 8 The following discussion is intended to provide a general description of a suitable environment in which various aspects of the disclosed subject matter may be implemented. Figure 8 A block diagram of an exemplary non-limiting operating environment in which one or more embodiments described herein may be facilitated is shown. For the sake of brevity, repetitive descriptions of similar elements employed in other embodiments described herein are omitted. Figure 8A suitable operating environment 800 for implementing various aspects of the present disclosure may also include a computer 812. The computer 812 may also include a processing unit 814, a system memory 816, and a system bus 818. The system bus 818 couples system components, including but not limited to the system memory 816, to the processing unit 814. The processing unit 814 may be any of a variety of available processors. Dual microprocessors and other multi-processor architectures may also be used as the processing unit 814. The system bus 818 may be any of several types of bus structures, including a memory bus or memory controller, a peripheral bus or external bus, and / or a local bus using any of a variety of available bus architectures, including but not limited to Industry Standard Architecture (ISA), Micro-Channel Architecture (MSA), Extended ISA (EISA), Intelligent Drive Electronics (IDE), VESA Local Bus (VLB), Peripheral Component Interconnect (PCI), Card Bus, Universal Serial Bus (USB), Advanced Graphics Port (AGP), FireWire (IEEE 1394), Small Computer System Interface (SCSI), Controller Area Network (CAN) bus, and Local Interconnect Network (LIN) bus. The system memory 816 may also include volatile memory 820 and non-volatile memory 822. The basic input / output system (BIOS), which contains basic routines for transferring information between elements within the computer 812, such as during startup, is stored in the non-volatile memory 822. By way of illustration and not limitation, the non-volatile memory 822 may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, or non-volatile random access memory (RAM) (e.g., ferroelectric RAM (FeRAM)). The volatile memory 820 may also include random access memory (RAM) that acts as external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), direct Rambus RAM (DRRAM), direct Rambus dynamic RAM (DRDRAM), and Rambus dynamic RAM.

[0073] Computer 812 may also include removable / non-removable, volatile / non-volatile computer storage media. Figure 8For example, disk storage 824 is shown. Disk storage 824 may also include, but is not limited to, devices such as a magnetic disk drive, a floppy disk drive, a tape drive, a Jaz drive, a Zip drive, an LS-100 drive, a flash memory card, or a memory stick. Disk storage 824 may also include storage media alone or in combination with other storage media, including, but not limited to, an optical disk drive, such as a compact disk ROM device (CD-ROM), a CD recordable drive (CD-R drive), a CD rewritable drive (CD-RW drive), or a digital versatile disk ROM drive (DVD-ROM). To facilitate connection of disk storage 824 to system bus 818, a removable or non-removable interface, such as interface 826, is typically used. Figure 8 Also depicted is software that acts as an intermediary between the user and the basic computer resources described in the appropriate operating environment 800. Such software may also include, for example, an operating system 828. The operating system 828, which may be stored on disk storage 824, is used to control and allocate the resources of the computer 812. System applications 830 utilize the operating system 828 to manage resources through, for example, program modules 832 and program data 834 stored in system memory 816 or on disk storage 824. It should be understood that the present disclosure may be implemented using various operating systems or combinations of operating systems. The user enters commands or information into the computer 812 through input devices 836. Input devices 836 include, but are not limited to, pointing devices such as a mouse, trackball, stylus, touchpad, keyboard, microphone, joystick, gamepad, satellite dish, scanner, TV tuner card, digital camera, digital video camera, webcam, etc. These and other input devices are connected to the processing unit 814 via the system bus 818 via interface ports 838. Interface ports 838 include, for example, serial ports, parallel ports, game ports, and universal serial buses (USB). Output devices 840 use some of the same types of ports as input devices 836. Thus, for example, a USB port can be used to provide input to computer 812 and output information from computer 812 to output devices 840. Output adapters 842 are provided to illustrate that among other output devices 840, some output devices 840, such as monitors, speakers, and printers, require specific adapters. By way of illustration and not limitation, output adapters 842 include video and sound cards that provide a means of connecting output devices 840 to system bus 818. It should be noted that other devices and / or systems of devices provide both input and output capabilities, such as remote computers 844.

[0074] Computer 812 can operate in a network environment using logical connections to one or more remote computers, such as remote computer 844. Remote computer 844 can be a computer, server, router, network PC, workstation, microprocessor-based device, peer device, or other public network node, and can generally include many or all of the elements described with respect to computer 812. For simplicity, only memory storage device 846 is shown with remote computer 844. Remote computer 844 is logically connected to computer 812 via network interface 848, and then physically connected via communication connection 850. Network interface 848 includes wired and / or wireless communication networks, such as local area networks (LANs), wide area networks (WANs), cellular networks, and the like. LAN technologies include Fiber Distributed Data Interface (FDDI), Copper Distributed Data Interface (CDDI), Ethernet, Token Ring, and the like. WAN technologies include, but are not limited to, point-to-point links, circuit-switched networks (such as Integrated Services Digital Networks (ISDN) and their variants), packet-switched networks, and Digital Subscriber Lines (DSL). Communication connection 850 refers to the hardware / software used to connect the network interface 848 to the system bus 818. Although communication connection 850 is shown internal to the computer 812 for clarity of illustration, it may also be external to the computer 812. For example purposes only, the hardware / software used to connect to the network interface 848 may also include internal and external technologies such as modems including conventional telephone-grade modems, cable modems, and DSL modems, ISDN adapters, and Ethernet cards.

[0075] The illustrated embodiments described herein may be employed with respect to a distributed computing environment (e.g., a cloud computing environment), such as the one described below with respect to Figure 9 As described, some tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in local and / or remote memory storage devices.

[0076] For example, one or more embodiments described herein and / or one or more components thereof may be employed with reference to Figure 9 One or more computing resources of a cloud computing environment are depicted in diagram 900. For example, one or more embodiments described herein and / or components thereof may employ such one or more resources to perform one or more of the following: mathematical functions, calculations, and / or equations; computational and / or processing scripts; algorithms; models (e.g., artificial intelligence (AI) models, machine learning (ML) models, deep learning (DL) models, and / or the like); and / or other operations according to one or more embodiments described herein.

[0077] It should be understood that although one or more embodiments described herein include detailed descriptions regarding cloud computing, implementation of the teachings described herein is not limited to cloud computing environments. Rather, one or more embodiments described herein can be implemented in conjunction with any other type of computing environment now known or later developed. That is, for example, one or more embodiments described herein can be implemented solely in a local environment and / or a non-cloud integrated distributed environment.

[0078] A cloud computing environment may provide one or more of low coupling, modularity, and / or semantic interoperability. The core of cloud computing is the infrastructure of a network including interconnection aspects.

[0079] Furthermore, the non-limiting system 100 may be associated with and / or included in a cloud-based and / or partially cloud-based system.

[0080] Now refer to Figure 9 9. Detail of one or more elements shown at , depicting illustrative cloud computing environment 900. Figure 9 9 is a schematic block diagram of a computing environment 900 with which the disclosed subject matter can interact. System 900 includes one or more remote components 910. Remote components 910 can be hardware and / or software (e.g., threads, processes, computing devices). In some embodiments, remote components 910 can be distributed computer systems that are connected to local automatic scaling components and / or programs that use resources of the distributed computer systems via a communication framework 940. Communication framework 940 can include wired network devices, wireless network devices, mobile devices, wearable devices, radio access network devices, gateway devices, femtocell devices, servers, and the like.

[0081] System 900 also includes one or more local components 920. Local components 920 can be hardware and / or software (e.g., threads, processes, computing devices). In some embodiments, local components 920 can include programs that connect to an autoscaling component of a remote distributed computing system via a communication framework 940 and / or communicate / use remote resources 910 and 920.

[0082] One possible communication between remote component 910 and local component 920 can be in the form of data packets suitable for transmission between two or more computer processes. Another possible communication between remote component 910 and local component 920 can be in the form of circuit-switched data suitable for transmission between two or more computer processes in a radio time slot. System 900 includes a communication framework 940, which can be used to facilitate communication between remote component 910 and local component 920 and can include an air interface via a Long Term Evolution (LTE) network, such as the Uu interface of a UMTS network. Remote component 910 can be operably connected to one or more remote data stores 950, such as a hard drive, solid-state drive, SIM card, device memory, etc., which can be used to store information on the remote component 910 side of the communication framework 940. Similarly, local component 920 can be operably connected to one or more local data stores 930, which can be used to store information on the local component 920 side of the communication framework 940.

[0083] The embodiments described herein may be directed to one or more of the systems, methods, apparatus, and / or computer program products at any possible level of technical detail integration. A computer program product may include a computer-readable storage medium (or multiple media) having computer-readable program instructions thereon for causing a processor to perform various aspects of one or more embodiments described herein. A computer-readable storage medium may be a tangible device that can retain and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a superconducting storage device, and / or any suitable combination of the foregoing. A non-exhaustive list of more specific examples of computer-readable storage media may also include the following: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device (such as a punch card with instructions recorded thereon or a raised structure in a groove), and / or any suitable combination of the foregoing. As used herein, computer-readable storage media should not be interpreted as transient signals themselves, such as radio waves and / or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides and / or other transmission media (e.g., light pulses through fiber optic cables), and / or electrical signals transmitted through wires.

[0084] The computer-readable program instructions described herein can be downloaded to corresponding computing / processing equipment and / or downloaded to an external computer or external storage device from a computer-readable storage medium via a network (e.g., the Internet, a local area network, a wide area network, and / or a wireless network). The network can include copper transmission cables, optical transmission fibers, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or the network interface in each computing / processing equipment receive computer-readable program instructions from the network, and forward computer-readable program instructions to be stored in the computer-readable storage medium in the corresponding computing / processing equipment. The computer-readable program instructions for performing the operation of one or more embodiments described herein can be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, configuration data of an integrated circuit, and / or source code and / or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​(such as Smalltalk, C++, etc.) and / or procedural programming languages ​​(such as "C" programming language and / or similar programming languages). The computer-readable program instructions can be executed entirely on the computer, partially on the computer, as a stand-alone software package, partially on the computer and / or partially on a remote computer or entirely on a remote computer and / or server. In the latter case, the remote computer can be connected to the computer via any type of network, including a local area network (LAN) and / or a wide area network (WAN), and / or can be connected to an external computer (e.g., via the Internet using an Internet service provider). In one or more embodiments, electronic circuits including, for example, programmable logic circuits, field programmable gate arrays (FPGAs) and / or programmable logic arrays (PLAs) can execute computer-readable program instructions by personalizing the electronic circuit using state information of the computer-readable program instructions to perform aspects of one or more embodiments described herein.

[0085] Reference is made to the flowchart illustrations and / or block diagrams of the methods, devices (systems) and computer program products according to one or more embodiments described herein to describe various aspects of one or more embodiments described herein. It should be understood that each frame of the flowchart and / or block diagram and the combination of frames in the flowchart and / or block diagram can be implemented by computer-readable program instructions. These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer and / or other programmable data processing device to produce a machine so that the instructions executed by the processor of the computer or other programmable data processing device can create a device for implementing the function / action specified in one or more frames of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium, which can guide a computer, a programmable data processing device and / or other equipment to operate in a specific manner so that the computer-readable storage medium having instructions stored therein can include an article of manufacture, which includes instructions for various aspects of the function / action specified in one or more frames of the flowchart and / or block diagram. Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, and / or other devices to cause a series of operational actions to be performed on the computer, other programmable apparatus, and / or other devices to produce a computer-implemented process, so that the instructions executed on the computer, other programmable apparatus, and / or other devices implement the functions / actions specified in one or more boxes of the flowchart and / or block diagram.

[0086] The flowcharts and block diagrams in the accompanying drawings illustrate possible implementations of the system, computer-implemented method, and / or computer program product according to one or more embodiments described herein. In this regard, each box in the flowchart or block diagram may represent a module, segment, and / or portion of an instruction, which includes one or more executable instructions for implementing a specified logical function. In one or more alternative embodiments, the functions indicated in the box may not occur in the order indicated in the accompanying drawings. For example, two boxes shown in succession may be executed substantially simultaneously, and / or the boxes may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart illustration and / or the combination of boxes in the block diagram and / or flowchart illustration may be implemented by a dedicated hardware-based system that can perform the specified functions and / or actions and / or execute one or more combinations of dedicated hardware and / or computer instructions.

[0087] Although the subject matter has been described above in the general context of computer-executable instructions of a computer program product running on one and / or multiple computers, it will be appreciated by those skilled in the art that one or more embodiments herein may also be implemented in combination with one or more other program modules. Typically, a program module includes routines, programs, components, data structures, etc. that perform specific tasks and / or implement specific abstract data types. In addition, the aforementioned computer-implemented methods can be practiced with other computer system configurations, including single-processor and / or multi-processor computer systems, microcomputing devices, mainframe computers and computers, handheld computing devices (e.g., PDAs, phones), microprocessor-based or programmable consumer and / or industrial electronic devices, etc. The illustrated aspects may also be practiced in a distributed computing environment, where tasks are performed by remote processing devices linked via a communication network. However, one or more (if not all) aspects of one or more embodiments described herein may be practiced on a stand-alone computer. In a distributed computing environment, program modules may be located in local and remote memory storage devices.

[0088] As used in this application, the terms "component", "system", "platform", "interface" and the like may refer to and / or may include computer-related entities or entities related to an operating machine having one or more specific functions. The entities described herein may be hardware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and / or a computer running on a processor. As an illustration, both an application running on a server and a server may be a component. One or more components may reside within a process and / or an execution thread, and a component may be located on one computer and / or distributed between two or more computers. In another example, each component may be executed from various computer-readable media having various data structures stored thereon. Components may communicate via local and / or remote processes, such as according to signals having one or more data packets (e.g., data from a component interacts with another component in a local system, a distributed system, and / or interacts with other systems across a network such as the Internet via signals). As another example, a component may be a device having a specific function provided by a mechanical component operated by an electrical circuit or electronic circuit, which is operated by software and / or firmware applications executed by a processor. In this case, the processor can be internal and / or external to the device and can execute at least a portion of a software and / or firmware application. As another example, the component can be a device that provides a specific function through electronic components without mechanical components, where the electronic components can include a processor and / or other devices to execute the software and / or firmware that at least partially imparts the functionality of the electronic components. In one aspect, the component can emulate the electronic component via a virtual machine within a cloud computing system, for example.

[0089] In addition, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X employs A or B" is intended to mean any natural inclusive permutation. That is, if X employs A; X employs B; or X employs both A and B, then "X employs A or B" is satisfied under any of the foregoing instances. In addition, the articles "a" and "an" as used in this specification and the drawings should generally be interpreted to mean "one or more" unless otherwise specified or clear from the context to point to the singular form. As used herein, the terms "example" and / or "exemplary" are used to mean serving as an example, instance, or illustration. For the avoidance of doubt, the subject matter described herein is not limited to these examples. In addition, any aspect or design described herein as "example" and / or "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects or designs, nor is it meant to exclude equivalent exemplary structures and techniques known to those of ordinary skill in the art.

[0090] As used in this specification, the term "processor" may refer to substantially any computational processing unit and / or device, including but not limited to a single-core processor; a single processor with software multi-threaded execution capability; a multi-core processor; a multi-core processor with software multi-threaded execution capability; a multi-core processor with hardware multi-threading technology; a parallel platform; and / or a parallel platform with distributed shared memory. In addition, a processor may refer to an integrated circuit, an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic controller (PLC), a complex programmable logic device (CPLD), discrete gate or transistor logic, discrete hardware components, and / or any combination thereof, designed to perform the functions described herein. In addition, the processor may utilize nanoscale architectures, such as, but not limited to, molecular-based transistors, switches, and / or gates, in order to optimize space usage and / or enhance the performance of associated devices. The processor may be implemented as a combination of computational processing units.

[0091] In this document, terms such as "storage," "memory," "data storage," "data storage," "database," and substantially any other information storage component related to the operation and functionality of the component are used to refer to a "memory component," an entity embodied in a "memory," or a component that includes a memory. The memories and / or memory components described herein may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. By way of illustration and not limitation, non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM), flash memory, and / or non-volatile random access memory (RAM) (e.g., ferroelectric RAM (FeRAM)). Volatile memory may include RAM, which may act as, for example, external cache memory. By way of illustration and not limitation, RAM can be available in many forms, such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), direct Rambus RAM (DRRAM), direct Rambus dynamic RAM (DRDRAM), and / or Rambus dynamic RAM (RDRAM). In addition, the memory components of the systems and / or computer-implemented methods described herein are intended to include, but are not limited to, these and / or any other suitable types of memory.

[0092] The foregoing includes only examples of systems and computer-implemented methods. Of course, for purposes of describing one or more embodiments, it is not possible to describe every conceivable combination of components and / or computer-implemented methods, but one of ordinary skill in the art will recognize that many further combinations and / or permutations of one or more embodiments are possible. Furthermore, to the extent that the terms "including," "having," "having," and the like are used in the detailed description, claims, appendices, and / or drawings, these terms are intended to be inclusive in a manner similar to the term "comprising" as "comprising" is to be interpreted when used as a transitional word in a claim.

[0093] The description of one or more embodiments has been presented for illustrative purposes and is not intended to be exhaustive or limited to the embodiments described herein. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, practical applications, and / or technical improvements over technologies found in the marketplace, and / or to enable others of ordinary skill in the art to understand the embodiments described herein.

[0094] Other aspects of the various embodiments described herein are provided by the subject matter of the following clauses:

[0095] Item 1: A system comprising: a first energy storage system group, the first energy storage system group including a first cell chemistry, the first cell chemistry being targeted at the energy density of an electric drive unit; at least a second energy storage system group, the at least second energy storage system group including a second cell chemistry, the second cell chemistry being different from the first cell chemistry and being targeted at the power density of the electric drive unit; and a power electronic converter, the power electronic converter connecting the first energy storage system group and the at least second energy storage system group and acting as a traction inverter to convert DC power from the first energy storage system group and the at least second energy storage system group to AC power to drive a motor of the electric drive unit.

[0096] Clause 2: The system according to any preceding clause further comprises: one or more additional energy storage system groups, the one or more additional energy storage system groups being connected to each other and to the first energy storage system group and the at least second energy storage system group via the power electronic converter, wherein the one or more additional energy storage system groups respectively comprise one or more battery cell chemicals that are different from each other and from the first battery cell chemical and the second battery cell chemical, and wherein the one or more battery cell chemicals are respectively targeted at different performance parameters of the electric drive unit.

[0097] Clause 3: A system according to any preceding clause, wherein the first energy storage system group is electrically isolated from the at least second energy storage system group to prevent current from rotating in the system, and independent management of the first energy storage system group and the at least second energy storage system group is ensured to control the respective amounts of electrical power drawn from the first energy storage system group and the at least second energy storage system group, and wherein the independent management is performed via a control system of the power electronic converter.

[0098] Clause 4: A system according to any preceding clause, wherein the power electronic converter has a multi-level topology selected based on a motor employed by the system.

[0099] Clause 5: The system of any preceding clause, wherein respective energy storage systems in the first energy storage system group and the at least second energy storage system group comprise a plurality of battery cells.

[0100] Clause 6: A system according to any of the preceding clauses, wherein the corresponding energy storage systems in the first energy storage system group have a first packaging type, and the corresponding energy storage systems in the at least second energy storage system group have a second packaging type different from the first packaging type.

[0101] Clause 7: A system according to any preceding clause, wherein the respective energy storage systems in the first energy storage system group and the at least second energy storage system group have different voltage levels, different lifespans, and are capable of being charged at different respective charging speeds.

[0102] Clause 8: The system of any preceding clause, wherein the first energy storage system group and at least the second energy storage system group are batteries or electrical energy storage systems other than batteries.

[0103] Clause 9: A system according to any preceding clause, wherein the first battery cell chemistry generates a first charge profile and a first load profile, and wherein the electric drive unit is used in an electric vehicle to increase the range of the electric vehicle.

[0104] Clause 10: The system of any preceding clause, wherein the second battery cell chemistry generates a second charge profile and a second load profile, and wherein the electric drive unit is used in an electric vehicle to improve performance of the electric vehicle.

[0105] Clause 11: The system of any preceding clause, wherein the power electronic converter selects the first energy storage system group or at least the second energy storage system group to generate electrical energy to drive the motor.

[0106] Clause 12: The system of any preceding clause, wherein the combination of the first energy storage system group and the at least second energy storage system group achieves redundancy in the system.

[0107] Clause 13: The system according to clause 1, having any combination of clauses 2-12 above.

[0108] Item 14: A method comprising: connecting a first energy storage system group and at least a second energy storage system group via a power electronic converter of an electric drive unit, wherein the first energy storage system group includes a first battery cell chemistry for an energy density of the electric drive unit, and the at least second energy storage system group includes a second battery cell chemistry different from the first battery cell chemistry and for a power density of the electric drive unit, wherein the power electronic converter serves as a traction inverter to convert DC power from the first energy storage system group and the at least second energy storage system group to AC power to drive a motor of the electric drive unit.

[0109] Clause 15: The method according to any preceding clause further includes: electrically isolating the first energy storage system group from the at least second energy storage system group to ensure independent management of the first energy storage system group and the at least second energy storage system group to control the corresponding amounts of electrical power drawn from the first energy storage system group and the at least second energy storage system group, wherein the independent management is performed via the control system of the power electronic converter.

[0110] Clause 16: The method of any preceding clause, wherein the power electronic converter has a multi-level topology selected based on a motor employed by the system.

[0111] Clause 17: The method according to any preceding clause further comprising: packaging the respective energy storage systems in the first energy storage system group in a first type of packaging; and packaging the respective energy storage systems in at least a second energy storage system group in a second type of packaging that is different from the first type of packaging.

[0112] Clause 18: A method according to any preceding clause, wherein the respective energy storage systems in the first energy storage system group and the at least second energy storage system group have different voltage levels, different lifetimes and are capable of being charged at different respective charging speeds.

[0113] Clause 19: The method of any preceding clause, wherein the first energy storage system group and at least the second energy storage system group are batteries or electrical energy storage systems other than batteries.

[0114] Clause 20: The method of Clause 14 above and any combination of Clauses 15-19 above.

[0115] Item 21: A system comprising: a first energy storage system group, the first energy storage system group including a first cell chemistry, the first cell chemistry being targeted for energy density of an electric vehicle; at least a second energy storage system group, the at least second energy storage system group including a second cell chemistry, the second cell chemistry being different from the first cell chemistry and targeted for power density of the electric vehicle; and two or more power electronic converters, the two or more power electronic converters serving as respective traction inverters to convert DC power from the first energy storage system group and the at least second energy storage system group into AC power to drive a motor of the electric vehicle, wherein the first energy storage system group and the at least second energy storage system group are connected via the two or more power electronic converters.

[0116] Clause 22: The system according to any preceding clause further includes: one or more additional energy storage system groups, wherein the one or more additional energy storage system groups are connected to each other via corresponding power electronic converters in the two or more power electronic converters, connected to the first energy storage system group and the at least second energy storage system group, wherein the one or more additional energy storage system groups respectively include one or more battery cell chemicals that are different from each other and from the first battery cell chemical and the second battery cell chemical, and wherein the one or more battery cell chemicals are respectively targeted at different performance parameters of the electric vehicle.

[0117] Clause 23: The system of Clause 21 above and any combination of Clauses 21 and 22 above.

Claims

1. A system comprising: a first energy storage system group including a first cell chemistry specific to the energy density of the electric drive unit; at least a second energy storage system group including a second cell chemistry different from the first cell chemistry and targeted to a power density of the electric drive unit; as well as a power electronic converter connecting the first energy storage system group and the at least second energy storage system group and acting as a traction inverter to convert direct current (DC) power from the first energy storage system group and the at least second energy storage system group into alternating current (AC) power to drive the motor of the electric drive unit.

2. The system according to claim 1, further comprising: One or more additional energy storage system groups, the one or more additional energy storage system groups being connected to each other and to the first energy storage system group and the at least second energy storage system group via the power electronic converter, wherein the one or more additional energy storage system groups respectively include one or more battery cell chemicals that are different from each other and from the first battery cell chemical and the second battery cell chemical, and wherein the one or more battery cell chemicals are respectively targeted at different performance parameters of the electric drive unit.

3. The system of claim 1 , wherein the first energy storage system group is electrically isolated from the at least second energy storage system group to prevent current from rotating in the system, and to ensure independent management of the first energy storage system group and the at least second energy storage system group to control the respective amounts of power drawn from the first energy storage system group and the at least second energy storage system group, and wherein the independent management is performed via a control system of the power electronic converter. 4 . The system of claim 1 , wherein the power electronic converter has a multi-level topology selected based on the motor employed by the system.

5. The system of claim 1, wherein respective energy storage systems in the first energy storage system group and the at least second energy storage system group comprise a plurality of battery cells.

6. The system of claim 1 , wherein respective energy storage systems in the first group of energy storage systems have a first packaging type, and respective energy storage systems in the at least second group of energy storage systems have a second packaging type different from the first packaging type.

7. The system of claim 1 , wherein respective energy storage systems in the first energy storage system group and the at least second energy storage system group have different voltage levels, different lifetimes, and are capable of being charged at different respective charging speeds.

8. The system of claim 1, wherein the first energy storage system group and the at least second energy storage system group are batteries or electrical energy storage systems other than batteries.

9. The system of claim 1, wherein the first battery cell chemistry generates a first charge profile and a first load profile, and wherein the electric drive unit is used in an electric vehicle to increase a range of the electric vehicle.

10. The system of claim 1, wherein the second battery cell chemistry generates a second charge profile and a second load profile, and wherein the electric drive unit is used in an electric vehicle to improve performance of the electric vehicle.

11. The system of claim 1 , wherein the power electronic converter selects the first energy storage system group or the at least second energy storage system group to generate electrical energy to drive the motor.

12. The system of claim 1, wherein the combination of the first energy storage system group and the at least second energy storage system group implements redundancy in the system.

13. A method comprising: A first energy storage system group and at least a second energy storage system group are connected via a power electronic converter of an electric drive unit, wherein the first energy storage system group includes a first battery cell chemistry for the energy density of the electric drive unit and the at least second energy storage system group includes a second battery cell chemistry different from the first battery cell chemistry and for the power density of the electric drive unit, wherein the power electronic converter serves as a traction inverter to convert DC power from the first energy storage system group and the at least second energy storage system group to AC power to drive a motor of the electric drive unit.

14. The method according to claim 13, further comprising: The first energy storage system group is electrically isolated from the at least second energy storage system group to ensure independent management of the first energy storage system group and the at least second energy storage system group to control the respective amounts of electrical power drawn from the first energy storage system group and the at least second energy storage system group, wherein the independent management is performed via a control system of the power electronic converter.

15. The method of claim 13, wherein the power electronic converter has a multi-level topology selected based on the motor employed by the system.

16. The method according to claim 13, further comprising: encapsulating respective energy storage systems of the first group of energy storage systems in a first type of enclosure; as well as Respective energy storage systems of the at least second group of energy storage systems are enclosed in a second type of packaging that is different from the first type of packaging.

17. The method of claim 13, wherein respective energy storage systems in the first and at least second energy storage system groups have different voltage levels, different lifetimes, and are capable of being charged at different respective charging speeds.

18. The method of claim 13, wherein the first energy storage system group and the at least second energy storage system group are batteries or electrical energy storage systems other than batteries.

19. A system comprising: a first energy storage system group including a first cell chemistry targeted for an energy density for an electric vehicle; at least a second energy storage system group including a second cell chemistry different from the first cell chemistry and targeted to a power density of the electric vehicle; as well as Two or more power electronic converters, the two or more power electronic converters acting as respective traction inverters to convert DC power from the first energy storage system group and the at least second energy storage system group into AC power to drive a motor of the electric vehicle, wherein the first energy storage system group and the at least second energy storage system group are connected via the two or more power electronic converters.

20. The system of claim 19, further comprising: One or more additional energy storage system groups, the one or more additional energy storage system groups being connected to each other and to the first energy storage system group and the at least second energy storage system group via corresponding power electronic converters in the two or more power electronic converters, wherein the one or more additional energy storage system groups respectively include one or more cell chemistries that are different from each other and from the first cell chemistries and the second cell chemistries, and wherein the one or more cell chemistries are respectively targeted at different performance parameters of the electric vehicle.

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