Module-based energy systems having converter-source modules and methods related thereto
Module-based energy systems are provided having multiple converter-source modules. The converter-source modules can each include an energy source and a converter. The systems can further include control circuitry for the modules. The modules can be arranged in various ways to provide single phase AC, multi-phase AC, and/or DC outputs. Each module can be independently monitored and controlled.
1. A modular battery pack system controllable to supply power to a multi-phase motor of an electric vehicle (EV), the modular battery pack system comprising:
a plurality of interconnection modules, each interconnection module comprising a plurality of respective ports, a respective battery, and respective switch circuitry, wherein the respective batteries are electrically coupled in parallel; and
a plurality of converter module arrays, each array comprising arrayed converter modules electrically coupled together to output an AC voltage signal comprising a superposition of output voltages from each of the arrayed converter modules, wherein each of the converter module arrays is configured to output an AC voltage waveform having a different phase angle for the multi-phase motor, and wherein each of the arrayed converter modules comprises an energy source and is controllable to selectively output a positive DC output voltage, zero output voltage, or negative DC output voltage from the energy source;
wherein each interconnection module has at least one respective port connected to a separate converter module array, and the respective switch circuitry of the plurality of interconnection modules are configured to selectively connect the batteries of the interconnection modules to the converter module arrays to balance states of charge across the plurality of converter module arrays;
a plurality of local control devices configured to output switch signals to each of the arrayed converter modules of each array and the interconnection modules;
a master control device communicatively coupled with the plurality of local control devices, the master control device configured to output information to the plurality of local control devices; and
wherein the plurality of local control devices are configured to generate pulse width modulated switch signals based on the information received from the master control device.
2. The system of claim 1 , further comprising control circuitry communicatively coupled with the arrayed converter modules of each array and with the plurality of interconnection modules.
3. The system of claim 2 , wherein the control circuitry is configured to control, for each array, the arrayed converter modules to balance intraphase state of charge.
4. The system of claim 3 , wherein the control circuitry is configured to control a first interconnection module to balance interphase state of charge between a first and a second array.
5. The system of claim 4 , wherein the control circuitry is configured to control the respective switch circuitry to exchange energy between the first array and the second array.
6. The system of claim 1 , wherein the plurality of local control devices are configured to output state of charge information about the arrayed converter modules of each array and the interconnection modules to the master control device.
7. The system of claim 1 , wherein in at least one interconnection module:
a positive terminal of the battery is electrically coupled with a first node;
a negative terminal of the battery is electrically coupled with a second node;
the switch circuitry is configured to:
selectively couple a first port of the plurality of ports to either the first or second node; and
selectively couple a second port to either the first or second node.
8. The system of claim 1 , wherein in a first interconnection module the switch circuitry is electrically coupled between a battery in the first interconnection module and another battery in a second interconnection module and first port and a second of the plurality of ports in the first interconnection module, and the switch circuitry in the second interconnection module is electrically coupled between the battery in the first interconnection module and a battery in the second interconnection module and a port in the second interconnection module.
9. The system of claim 1 , wherein a first array has a first end and a second end opposite the first end, wherein the first end has a first end terminal that outputs the AC voltage signal of the first array to the multi-phase motor, and the second end has a second end terminal electrically coupled to a first interconnection module.
10. The system of claim 9 , wherein a second array has a first end and a second end opposite the first end, wherein the first end has a first end terminal that outputs the AC voltage signal of the second array to the multi-phase motor, and the second end has a second end terminal electrically coupled to the first interconnection module, and
wherein a third array has a first end and a second end opposite the first end, wherein the first end has a first end terminal that outputs the AC voltage signal of the third array to the multi-phase motor, and the second end has a second end terminal electrically coupled to a second interconnection module.
11. The system of claim 1 , further comprising control circuitry configured to control the plurality if interconnection modules to balance interphase state of charge between the plurality of arrays.
12. The system of claim 1 , further comprising control circuitry configured to control the plurality of interconnection module to exchange energy between the plurality of arrays.
13. A method of supplying power from a modular battery pack system of an electric vehicle (EV), the method comprising:
controlling a plurality of converter module array to output multi-phase voltage signals to a multi-phase motor of the EV, wherein each array comprises a plurality of arrayed converter modules electrically coupled together to output an AC voltage signal comprising a superposition of output voltages from each of the arrayed converter modules, wherein each of the arrayed converter modules comprises an energy source and is controllable to selectively output a positive DC output voltage, zero output voltage, or negative DC output voltage from the energy source, and wherein:
wherein for a plurality of interconnection modules, each interconnection module comprising a plurality of respective ports, a respective battery, and respective switch circuitry, wherein the respective batteries are electrically coupled in parallel, each interconnection module has at least one respective port connected to a separate converter module array, and the respective switch circuitry of the plurality of interconnection modules are configured to selectively connect the batteries of the interconnection modules to the converter module arrays to balance states of charge across the plurality of converter module arrays, the controlling comprising:
outputting information from a master control device to a plurality of local control devices;
generating, by the plurality of local control devices, pulse width modulated signals from the information received from the master control device; and
controlling each arrayed converter module of the arrays by the pulse width modulated signal to selectively output the positive DC output voltage, zero output voltage, or negative DC output voltage; and
controlling interconnection modules to selectively connect the batteries of the interconnection modules to the converter module arrays to balance states of charge across the plurality of converter module arrays.
14. The method of claim 13 , wherein controlling interconnection modules comprises controlling switch circuitry of a first interconnection module to selectively couple a first array or a second array to the battery of the first interconnection module.
15. The method of claim 13 , wherein controlling interconnection modules comprises controlling a first interconnection module to balance interphase state of charge between a first array and a second array.
16. The method of claim 15 , wherein controlling interconnection modules to balance interphase state of charge between the first array and the second array comprises:
controlling switch circuitry of the first interconnection module with a pulse width modulated switch signal to selectively couple the first array or the second array to a battery of the first interconnection module.
17. The method of claim 13 , wherein controlling interconnection modules comprises controlling a first interconnection module to exchange energy between a first array and a second array.
18. The method of claim 13 , wherein controlling the converter module arrays to output multi-phase voltage signals comprises controlling, for each array, the arrayed converter modules to balance intraphase state of charge.
19. The method of claim 13 , wherein controlling interconnection modules comprises controlling switch circuitry of a first interconnection module that is electrically coupled between a battery of the first interconnection module and a battery of a second interconnection module and a first port and a second port of the first interconnection module, and controlling switch circuitry of the second interconnection module that is electrically coupled between the batteries and a port of the second interconnection module.
20. The method of claim 13 , wherein a first array has a first end with a first end terminal that outputs the AC voltage signal of the first array to the multi-phase motor, and a second end, opposite the first end, with a second end terminal that is connected to a first interconnection module.
21. The method of claim 20 , wherein a second array has a first end with a first end terminal that outputs the AC voltage signal of a second array to the multi-phase motor, and a second end, opposite the first end, with a second end terminal that is connected to the first interconnection module, and
wherein a third array has a first end with a first end terminal that outputs the AC voltage signal of the third array to the multi-phase motor, and a second end, opposite the first end, with a second end terminal that is connected to the second interconnection module.
22. The method of claim 13 , wherein a first interconnection module and a second interconnection module are controlled to balance interphase state of charge between arrays.
23. The method of claim 13 , wherein a first interconnection module and a second interconnection module are controlled to exchange energy between the arrays.