JP2013243927A - Drive electric power supply device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply electric power required for a rotary electric machine and a load, in a drive electric power supply device for a vehicle, including a plurality of electric power supply devices connected in parallel with each other for performing electric power transfer through a rotary electric machine and an inverter mounted on the vehicle.SOLUTION: A drive electric power supply device for a vehicle includes a plurality of electric power supply devices 3, 5 connected in parallel with each other for performing electric power transfer through a rotary electric machine 1 and an inverter 2 mounted on a vehicle. The drive electric power supply device for the vehicle includes: a control device 7 which variably controls a current flow rate of each controllable DC converting device so that each controllable DC converting device periodically causes the current to flow through the inverter and each controllable DC converting device supplies predetermined drive electric power to the rotary electric machine via the inverter; and a plurality of electric power supply state detection devices 31, 51 corresponding to the respective electric power supply devices and detecting the states of the corresponding electric power supply devices. The current flow rate of the corresponding controllable DC converting device is controlled by the control device in response to the state of the corresponding electric power supply device detected by each electric power supply state detection device.

Description

  The present invention relates to a vehicle drive power supply device, and more particularly to a vehicle drive power supply device for driving a rotating electrical machine represented by a permanent magnet AC synchronous motor.

  Many proposals have been made for a vehicle drive power supply device that can be efficiently acquired for driving a rotating electrical machine that is mounted on a vehicle and typified by a permanent magnet AC synchronous motor.

For example, Patent Literature 1 proposes a device that connects a battery and a capacitor in parallel to make maximum use of the capacity of the capacitor.
Patent Document 2 discloses a control method capable of suppressing loss in a power supply system including two power storage devices and two voltage conversion devices.
Patent Document 3 discloses a method for selecting an optimum phase number based on a step-up / step-down ratio while enabling ripple reduction and downsizing or reduction of electronic components for a multi-phase multiple type step-up / down converter. Is disclosed.

JP-A-6-292305 (FIG. 1 and its description) Japanese Patent Laying-Open No. 2008-17661 (FIG. 1 and description thereof) JP 2004-357388 A (FIG. 1 and its description)

For example, in an electric vehicle that obtains propulsive power by driving a rotating electrical machine represented by a permanent magnet AC synchronous motor, it is necessary to increase the capacity by adding the number of batteries to further extend the cruising range There is. However, if the number of installed batteries is simply increased as a series connection, the total voltage of the battery also increases, and as a result, the loss increases when power is supplied to the rotating electrical machine via the inverter device, and the breakdown voltage of the device is increased. This leads to cost increase and equipment enlargement.
Therefore, it is conceivable to connect the batteries in parallel if the drive voltage of the rotating electrical machine is not changed and the capacity of the battery is improved while maintaining the total voltage of the battery.
Here, the batteries connected in parallel are, for example, batteries having different total voltages, or batteries having different characteristics such as an output-oriented type and an energy-oriented type, or batteries having different degrees of deterioration. Thus, in the case of different batteries that are not exactly the same, it is difficult to balance the voltages between the batteries.
Patent Document 1 proposes a method in which the capacitor capacity can be utilized to the maximum by controlling the current control means so that the capacitor voltage is higher than the battery voltage in a configuration in which a battery and a capacitor are connected in parallel. However, no proposal has been made regarding a method for controlling the balance between power storage devices and extracting desired power, and no method for reducing current ripple in the inverter has been proposed.
Patent Document 2 proposes a method of reducing loss by controlling the number of phases to be operated in accordance with required power in a power supply system having a two-phase configuration of a power storage device and a voltage conversion device. However, a proposal for controlling the voltage balance between power storage devices and operating multiple phases at the same time only by raising the loss reduction measures by adjusting the number of voltage converters that are activated or deactivated Has not been made.
In Patent Document 3, a DC chopper is connected in parallel in a plurality of phases in order to increase and decrease the output of at least the battery connected in series and efficiently take out while reducing ripples. It has proposed about the setting method.
However, no proposal has been made regarding a method for extracting desired power from batteries connected in parallel.

  The present invention has been made in view of the above-described circumstances, and is a vehicle drive power supply device including a plurality of power supply devices connected in parallel to perform power transfer via a rotating electrical machine and an inverter mounted on the vehicle. In the present invention, it is an object of the present invention to be able to stably supply electric power necessary for a rotating electrical machine and a load.

  A vehicle drive power supply device according to the present invention is a vehicle drive power supply device including a plurality of power supply devices connected in parallel to each other to perform power transfer via a rotating electrical machine and an inverter mounted on the vehicle, A plurality of controllable DC converters connected in parallel and connected between an inverter and each power supply device to convert the power of the corresponding power supply device, each controllable DC conversion device having a period relative to the inverter The controllable DC converter is variably controlled so that each controllable DC converter supplies a predetermined drive power to the rotating electrical machine via the inverter. A control device, and a plurality of power supply state detection devices provided corresponding to the respective power supply devices and detecting the state of the corresponding power supply device. Depending on the state of the detected corresponding power supplies, in which the conduction ratio of the corresponding controllable DC converter is controlled by the control device.

  The present invention is a vehicular drive power supply device including a plurality of power supply devices connected in parallel to perform electric power transfer via a rotating electrical machine mounted on a vehicle and an inverter, and each of the inverter, the power supply devices, A plurality of controllable DC converters connected in parallel to convert the power of the corresponding power supply device connected between each of the controllable DC converters, each of the controllable DC converters periodically passing power to the inverter. A control device for variably controlling the conduction rate of each controllable DC converter so that each controllable DC converter supplies a predetermined drive power to the rotating electrical machine via the inverter, and each power source A plurality of power supply state detection devices provided corresponding to the devices and detecting the state of the corresponding power supply device, and the corresponding power supply devices detected by each of the power supply state detection devices Depending on the state, the flow rate of the corresponding controllable DC converter is controlled by the control device, so that a plurality of power sources connected in parallel to each other for power transmission and reception via a rotating electric machine and an inverter mounted on the vehicle In the vehicle drive power supply device provided with the device, there is an effect that the electric power necessary for the rotating electrical machine and the load can be stably supplied.

It is a figure which shows the reference example 1 of this invention, and is a figure which illustrates an example of a process structure. It is a figure which shows the reference example 1 of this invention, and is a figure which illustrates the flowchart which shows the outline of an example of the process sequence in the control apparatus in FIG. It is a figure which shows the reference example 1 of this invention, and is a figure which illustrates the flowchart which shows an example of a flow start process in the control apparatus in FIG. It is a figure which shows the reference example 1 of this invention, and is a figure which illustrates the flowchart which shows an example of the flow end process in the control apparatus in FIG. It is a figure which shows the reference example 1 of this invention, and is a figure which illustrates an example of the timing chart of the flow control of the 1st phase and the 2nd phase in the control apparatus in FIG. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the other example of a processing structure. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the flowchart which shows the outline of an example of the process sequence of the control apparatus in FIG. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the flowchart of a state detection process. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the flowchart of a flow start timing determination process. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the flowchart of a flow rate determination process. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the flowchart of a flow start process. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the flowchart of a flow end process. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the timing chart of the flow control of a 1st phase and a 2nd phase. It is a figure which shows the reference example 2 of this invention, and is a figure which illustrates the timing chart of an inverter input and an inverter output. It is a figure which shows Embodiment 1 of this invention, and is a figure which illustrates a processing structure. It is a figure which shows Embodiment 1 of this invention, and is a figure which illustrates the flowchart of a process sequence. It is a figure which shows Embodiment 1 of this invention, and is a figure which illustrates the flowchart of a state detection process. It is a figure which shows Embodiment 1 of this invention, and is a figure which illustrates the flowchart of a flow rate determination process. It is a figure which shows Embodiment 1 of this invention, and is a figure which illustrates the flowchart of a flow start process. It is a figure which shows Embodiment 1 of this invention, and is a figure which illustrates the flowchart of a flow end process. It is a figure which shows Embodiment 1 of this invention, and is a figure which illustrates the timing chart of the flow control of a 1st phase and a 2nd phase.

Reference Example 1
Hereinafter, Reference Example 1 of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of a processing configuration in the first reference example.
In FIG. 1, 1 is a permanent magnet AC synchronous motor (hereinafter abbreviated as “motor”) that generates driving force for a vehicle, 2 is an inverter that converts power supplied to the motor 1 from DC to AC, and 3 is a storage A first power supply device 4 such as a storage battery that supplies electric power to the motor 1 via the inverter 2 and stores regenerative power of the motor 1, and a first power supply device 3 for supplying drive power to the motor 1 via the inverter 2. A first controllable DC converter 5 for converting the power of the second power supply device 5 such as a storage battery for supplying the stored power to the motor 1 via the inverter 2 and storing the regenerative power of the motor, 6 for the inverter 2 A second controllable DC converter for converting the power of the second power supply device 5 to supply drive power to the motor 1, a first controllable DC converter 4 for supplying a predetermined voltage to the inverter 2, and 7 Second controllable It shows a control device for controlling the flow converter 6, respectively. A configuration including the first power supply device 3 and the first controllable DC conversion device 4 is referred to as a first phase, and a configuration including the second power supply device 5 and the second controllable DC conversion device 6 is referred to as a second phase.

  In the present embodiment, the phase number N is shown as two phases, but the phase number N may be two or more. Further, it is assumed that lithium ion batteries are used as the first power supply device 3 and the second power supply device 5, but the means to be used is not limited to these, and other means other than the lithium ion battery may be used.

Next, the operation will be described.
FIG. 2 is a flowchart illustrating an outline of an example of a processing procedure in the control device 7 according to the first reference example.
During the operation of the control device 7, the timer count is incremented by 1 in FIG. 2 (step ST21).
The flow control of the first controllable DC conversion device 4 and the second controllable DC conversion device 6 starts the flow start process (step ST22) and the flow end process (step ST23) so as to supply a predetermined voltage to the inverter 2. ).
FIG. 3 is a flowchart showing an outline of a processing procedure in the flow start processing (step ST22). In this reference example 1, as illustrated in FIG. 5, the control device 7 controls the first phase with a predetermined cycle C ₁ , and the second phase is C ₂ from the first phase flow start timing. As a control after the first phase, the first phase flow start timing is TS ₁ , and the second phase flow start timing is TS ₂ .
In the flow start process (step ST22), when the timer count is TS ₁ (step ST31), the first controllable DC converter 4 is controlled as the first phase flow start (step ST32).
Also, the timer count is set to 0 at the first phase flow start timing (step ST33). When the timer count is TS ₂ (step ST34), the second controllable DC converter 6 is controlled as the second phase flow start (step ST35).

As illustrated in FIG. 2, the flow proceeds to the flow end process (step ST23) after the flow start process (step ST22).
FIG. 4 is a flowchart showing an outline of an example of a processing procedure in the flow end process (step ST23). In FIG. 4, as illustrated in FIG. 5, the first phase is driven at a predetermined flow rate d ₁ and the second phase is driven at a predetermined flow rate d _2. The end timing is TE ₁ , and the second-phase flow end timing is TE ₂ .
In FIG. 4, when the timer count is TE ₁ (step ST41), the first controllable DC converter 4 is controlled as the first phase end of flow (step ST42).
When the timer count is TE ₂ (step ST43), the second controllable DC converter 6 is controlled as the second phase end of flow (step ST44).

FIG. 5 is an example of a timing chart showing a flow control image of the first phase and the second phase in the control device 7 in FIG. 1 of the first reference example. In the present Reference Example 1, as illustrated in FIG. 5, the first controllable DC converter 4 of the first phase is controlled by the control device 7 at a predetermined cycle C ₁ and the second controllable DC of the second phase. converter 6 is controlled after C ₂ from flowing start timing of the first controllable DC converter 4 of the first phase. Further, the first phase first controllable DC converter 4 is driven at a predetermined conduction rate d ₁ , and the second phase second controllable DC converter 6 is driven at a predetermined conductivity d _2. . That is, the control device 7 repeats the control of starting the flow of the first phase controllable DC converter 4 of the first phase at TS ₁ and ending the flow at TE ₁ in the cycle C ₁ , 2 Controlling the DC control device 6 so as to start the flow at TS ₂ after C ₂ from the start of the first phase flow and end the flow at TE ₂ to supply a predetermined voltage to the inverter 2 To do. In the present embodiment, the number of phases is N = 2, but the configuration may be two or more.

  As described above, the phases of the N-phase controllable DC converters 4 and 6 are controlled by the control device 7 in synchronization with the start timing of the flow, and desired power is supplied for each phase. As described above, since the control device 7 variably controls the flow rate of the controllable DC converters 4 and 6 of each phase, for example, the total voltage of the power supply device is changed to extend the cruising range of the electric vehicle. For the purpose of increasing the total capacity, the power supply devices 3 and 5 are connected in parallel, and when the power supply devices 3 and 5 are not the same but different, the controllable DC converters 4 of the phases connected in parallel are connected. 6 is defined by the control device 7 and the flow rate of each phase can be arbitrarily controlled. Therefore, even if the power supply devices 3 and 5 are arranged in parallel, the power supply devices 3 and 5 of the respective phases. Easy to balance the voltage of each phase It can be realized et desired stable power supply. Further, even if the power supply devices 3 and 5 are arranged in parallel, the ripple of the current flowing through the inverter 2 can be reduced, and the capacity of each smoothing capacitor of the controllable DC converters 4 and 6 can be reduced. And cost reduction.

Reference Example 2
Hereinafter, the reference example 2 will be described with reference to the drawings.
FIG. 6 shows an example of the processing configuration in the second reference example.
In FIG. 6, 1 is a permanent magnet AC synchronous motor (hereinafter abbreviated as “motor”) that generates the driving force of the vehicle, 2 is an inverter that converts power supplied to the motor 1 from DC to AC, and 3 is a storage. A first power supply device 4 such as a storage battery that supplies electric power to the motor 1 via the inverter 2 and stores regenerative power of the motor 1, and a first power supply device 3 for supplying drive power to the motor 1 via the inverter 2. A first controllable DC converter 5 for converting the power of the second power supply device 5 such as a storage battery for supplying the stored power to the motor 1 via the inverter 2 and storing the regenerative power of the motor, 6 for the inverter 2 A second controllable DC converter that converts the power of the second power supply device 5 to supply drive power to the motor 1, 7 is based on the drive frequency information 2 s from the inverter 2 and the first controllable DC converter 4 and 2 possible Shows a controller supply voltage of the control DC converter 6 to their the inverter is controlled to vary in accordance with the driving frequency, respectively. A configuration including the first power supply device 3 and the first controllable DC conversion device 4 is referred to as a first phase, and a configuration including the second power supply device 5 and the second controllable DC conversion device 6 is referred to as a second phase.

  In the present embodiment, the phase number N is shown as two phases, but the phase number N may be two or more. Further, it is assumed that lithium ion batteries are used as the first power supply device 3 and the second power supply device 5, but the means to be used is not limited to these, and other means other than the lithium ion battery may be used.

Next, the operation will be described.
FIG. 7 is a flowchart illustrating an outline of an example of a processing procedure in the control device 7 according to the second reference example.
During the operation of the control device 7, the timer count is incremented by 1 in FIG. 7 (step ST71).
Information such as the drive frequency from the inverter 2 is acquired in the state detection process (step ST72), and each flow start of the first controllable DC converter 4 and the second controllable DC converter 6 is started based on the acquired information. The timing is determined by the flow start timing determination process (step ST73) and the respective flow rates of the first controllable DC converter 4 and the second controllable DC converter 6 by the flow rate determination process (step ST74). From these processing results, the flow control of the first controllable DC converter 4 and the second controllable DC converter 6 is performed by a flow start process (step ST75) and a flow end process (step ST76).
FIG. 8 is an example of a flowchart showing an outline of the processing procedure of the state detection processing (step ST72). Control device 7 obtains drive frequency 2s of inverter 2 from inverter 2 in FIG. 8 (step ST81).

As illustrated in FIG. 7, after the state detection process (step ST72), the process proceeds to the flow start timing determination process (step ST73).
FIG. 9 is an example of a flowchart showing an outline of the processing procedure of the flow start timing determination process (step ST73). In this reference example 2, as illustrated in FIG. 13, the control device 7 determines the first-phase driving cycle C ₁ and the first phase from the driving frequency 2 s of the inverter 2 acquired in the state detection process (step ST 72). decide flowing start timing C ₂ of the second phase in light of the flowing start timing of one phase, set the flowing start timing TS ₁ of the first phase (step ST 91), the second phase of the flowing start timing TS ₂ is set (step ST92).

As illustrated in FIG. 7, the process proceeds to the flow rate determination process (step ST74) after the flow start timing determination process (step ST73).
FIG. 10 is a flowchart showing an outline of an example of a processing procedure of the flow rate determination process (step ST74). In FIG. 10, as illustrated in FIG. 13, a predetermined voltage is applied to the inverter 2 based on the drive frequency 2 s of the inverter 2 acquired in the state detection process (step ST <b> 72) and the conduction start timing of each phase. Assuming that the first-phase conduction rate d ₁ and the second-phase conduction rate d ₂ are driven so as to supply, the first-phase conduction end timing TE ₁ is set (step ST101), and the second phase set the flowing end timing TE ₂ phase (step ST 102).

As illustrated in FIG. 7, after the flow rate determination process (step ST74), the process proceeds to the flow start process (step ST75).
FIG. 11 is a flowchart showing an outline of an example of a processing procedure of the flow start processing (step ST75). In FIG. 11, as exemplified in FIG. 13, based on the flow start timing of each phase set in the flow start timing determination process (step ST73), when the timer count is TS ₁ (step ST111), The first controllable DC converter 4 is controlled as the first phase flow start (step ST112). Also, the timer count is set to 0 at the first phase flow start timing (step ST113). When the timer count is TS ₂ (step ST114), the second controllable DC converter 6 is controlled as the start of second phase flow (step ST115).

As illustrated in FIG. 7, after the flow start process (step ST75), the flow proceeds to the flow end process (step ST76).
FIG. 12 is a flowchart showing an outline of an example of a processing procedure of the flow end process (step ST76). In this flow end process (step ST76), control is performed based on the flow end timing determined in the flow rate determination process (step ST74).
In FIG. 12, as also illustrated in FIG. 13, when the timer count is TE ₁ (step ST121), the first controllable DC converter 4 is controlled as the first phase end of flow (step ST122). . Further, when the timer count is TE ₂ (step ST123), the second controllable DC converter 6 is controlled as the end of the second phase flow (step ST125).

FIG. 13 is an example of a timing chart showing a flow control image of the first phase and the second phase in the control device 7 in FIG. 6 of the second reference example. In this reference example 2, as illustrated in FIG. 13, the drive cycle of the first phase first controllable DC converter 4 and the second phase second controllable DC converter 6 is controlled by the control device 7 as an inverter. 2 is set by the control device 7 based on the drive frequency 2s. The first controllable DC converter 4 of the first phase is controlled with the cycle C ₁ this time, but in the next cycle, the cycle becomes C ₁ 'according to the drive frequency 2s of the inverter 2, and the second phase The 2 controllable DC converter 6 is controlled after C ₂ from the first phase flow start timing, but is controlled after C ₂ ′ according to the drive frequency 2 s of the inverter 2 in the next cycle. Thus, according to the drive frequency 2s of the inverter 2, each drive period of the 1st controllable DC converter 4 of a 1st phase and the 2nd controllable DC converter 6 of a 2nd phase becomes variable for every period. Similarly, the respective conduction rates of the controllable DC converters 4 and 6 for each phase change for each period according to the drive frequency 2s of the inverter 2, and this time the first controllable DC converter 4 for the first phase. There conduction ratio d _1, but the second controllable DC converter 6 of the second phase is driven by the conduction ratio d _2, the first controllable DC converter 4 of the first phase in the next cycle Tsuryu The rate d ₁ ′ and the second phase second controllable DC converter 6 become the flow rate d ₂ ′, and accordingly, the start timing of the flow of the controllable DC converters 4 and 6 of each phase Further, TS ₁ , TS ₂ , TE ₁ , and TE _{2 of the} flow end timing also change like TS ₁ ′, TS ₂ ′, TE ₁ ′, and TE ₂ ′ depending on the cycle. In this reference example 2, the number of phases is N = 2, but the configuration may be two or more.

  FIG. 14 is an example of a timing chart showing an outline of the input of the inverter 2 and the output of the inverter 2 in the second reference example. An inverter used in a drive system of an electric vehicle is generally of a pulse width modulation type. This reference example 2 is characterized in that the controllable DC converters 4 and 6 of each phase are controlled in conjunction with the drive frequency 2s of the inverter 2. That is, the pulse width D that is the drive cycle of the inverter 2 is generated by the controllable DC converters 4 and 6, and the inverter 2 performs control to invert the polarity of the input. In comparison, the functions of the inverter can be reduced.

  As described above, the control device 7 arbitrarily variably controls the flow start timing of the controllable DC converters 4 and 6 of each phase, and the control device 7 drives the inverter 2 at the drive timing. The control device 7 controls the flow start timing of the controllable DC converters 4 and 6 of each phase to be synchronized with the drive timing of the inverter 2, so that, for example, for an electric vehicle In order to increase the total capacity without changing the total voltage of the power supply device in order to extend the cruising range, the power supply devices 3 and 5 are connected in parallel, and the power supply devices 3 and 5 connected in parallel are not the same but different. In this case, in order to control the conduction ratio of the controllable DC converters 4 and 6 of each phase in conjunction with the drive timing of the inverter 2, the desired stable power supply from each phase to the inverter 2 is achieved. The realized can also easily takes the voltage balance of each phase were parallelized. In addition, since the controllable DC converters 4 and 6 perform conduction rate control in conjunction with the drive timing of the inverter 2, the inverter 2 performs control to invert the polarity of the input signal from the controllable DC converters 4 and 6. Thus, the function and configuration of the inverter 2 can be simplified as compared with the conventional pulse width modulation method.

Embodiment 1 FIG.
Hereinafter, the first embodiment will be described with reference to the drawings.
FIG. 15 shows an example of the processing configuration in the first embodiment.
In FIG. 15, 1 is a permanent magnet AC synchronous motor (hereinafter abbreviated as “motor”) that generates driving force for the vehicle, 2 is an inverter that converts power supplied to the motor 1 from DC to AC, and 3 is a storage. A first power supply device such as a storage battery that supplies electric power to the motor 1 via the inverter 2 and stores regenerative power of the motor 1, 31 is a first power supply charge state detection device that detects the charge state of the first power supply device 3, 4 Is a first controllable DC converter that converts the power of the first power supply device 3 to supply driving power to the motor 1 via the inverter 2, 5 supplies the stored power to the motor 1 via the inverter 2, and A second power supply device such as a storage battery that stores regenerative power of the motor 1, 51 is a second power supply charge state detection device that detects the charge state of the second power supply device 5, and 6 supplies drive power to the motor 1 via the inverter 2. Second to The second controllable DC converter for converting the power of the power supply device 5, 7 is the charge state of the power supply devices 3, 5 of each phase obtained from the first power supply charge state detection device 31 and the second power supply charge state detection device 51. The control devices for controlling the first controllable DC converter 4 and the second controllable DC converter 6 based on the information 31s and 51s so that the supply voltages to the inverters change according to the state of charge are shown. The configuration including the first power supply device 3 with the first power supply charge state detection device 31 and the first controllable DC conversion device 4 is the first phase, the second power supply device 5 with the second power supply charge state detection device 51 and the first A configuration including the two controllable DC converter 6 is a second phase.

  In the first embodiment, the number of phases N is shown as two, but the number of phases N may be two or more. Further, it is assumed that lithium ion batteries are used as the first power supply device and the second power supply device, but the means to be used is not limited to these, and other means other than the lithium ion battery may be used. The power supply device 3 and the second power supply device 5 may have different characteristics or different types. Further, as the first power supply charge state detection device 31 and the second power supply charge state detection device 51, an apparatus that uses the outputs 3s and 5s of the current sensor and calculates the power consumption from the voltages of the power supply devices 3 and 5 to estimate the charge state However, the means to be used is not limited to this, and other means may be used. Moreover, although the object of the state detected from the 1st power supply device 3 and the 2nd power supply device 5 is assumed to be each charge state, the state of the power supply device to detect is not limited to this, deterioration state, temperature, etc. Other states of the power supply device may be used. Further, as the information 31s and 51s referred to when the control device 7 controls the first controllable DC converter 4 and the second controllable DC converter 6, the first power supply charge state detection device 31 and the second power supply charge state are referred to. The charging states of the first power supply device 3 and the second power supply device 5 obtained from the detection device 51 are assumed. However, the information on the power supply device to be used is not limited to this, and the power supply device deterioration state, temperature, etc. Other information may be used.

Next, the operation will be described.
FIG. 16 is a flowchart illustrating an outline of an example of a processing procedure of the control device 7 according to the first embodiment.
During the operation of the control device 7, the timer count is incremented by 1 in FIG. 16 (step ST161).
In the state detection process (step ST162), the information 31s, 51s is acquired from the first power supply state detection device 31 and the second power supply state detection device 51, and the first phase of the first phase is obtained based on the acquisition information 31s, 51s. The corrected conduction rate of the first controllable DC converter 4 and the second phase second controllable DC converter 6 is determined by the conduction rate determination process (step ST163), and the first controllable DC is based on these conduction rates. Flow control of the converter 4 and the second controllable DC converter 5 is performed by a flow start process (step ST164) and a flow end process (step ST165).
FIG. 17 is an example of a flowchart showing an outline of the processing procedure of the state detection processing (step ST162). In the first embodiment, as illustrated in FIG. 17, the control device 7 uses the first power supply charge state detection device to obtain the charge state information 31 s and 51 s of the first power supply device 3 and the second power supply device 5. 31 and the second power supply charging state detection device 51 (steps ST171 and ST172).

As illustrated in FIG. 16, the flow proceeds to the flow rate determination process (step ST163) after the state detection process (step ST162).
FIG. 18 is an example of a flowchart showing an outline of the processing procedure of the flow rate determination processing (step ST163). In the first embodiment, in order to supply a predetermined voltage to the inverter 2, the controllable DC converters 4 and 6 of each phase are set in advance with a conduction ratio, and the first phase first controllable device is set. The controlled DC converter 4 has a conductivity d ₁ , and the second phase second controllable DC converter 6 has a conductivity d ₂ . The purpose of the current flow rate determination process (step ST163) is to correct the current flow rate of each phase based on the state of charge of the power supply devices 3 and 5 to obtain a corrected current flow rate used in the control. .
In FIG. 18, the control device 7 calculates the average value of the charge amount from the charge states of the first-phase and second-phase power supply devices 3 and 5 obtained in the state detection process (step ST162), that is, the charge amounts 3s and 5s. (Step ST181).
This average value is compared with the charge amounts 3 s and 5 s of the power supply devices 3 and 5 of each phase, and a large output is obtained from a phase with a larger charge amount than the average value, and a small output from a phase with a smaller charge amount than the average value. Set the correction value for each phase so that The correction value for the first phase is r ₁ , and the correction value for the second phase is r ₂ . Multiplying this correction value by the preset flow rate for each phase, the flow rate to be set for each phase is derived. That is, in the first phase, dr ₁ which is a value obtained by multiplying the duty ratio d ₁ by the correction value r ₁ is set as a corrected duty ratio (step ST182), and in the second phase, the correction value r ₂ is set to the duty ratio d _2. The multiplied value dr ₂ is set as a corrected conduction rate (step ST183).
In the first embodiment, controlled by the unit 7, a first controllable DC converter 4 of the first phase is controlled at a predetermined cycle C _1, the second controllable DC converter 6 of the second phase the first phase It is assumed that the control is performed after C ₂ from the flow start timing of the first phase. From the flow start timings of the first phase controllable DC converter 4 of the first phase and the second controllable DC converter 6 of the second phase. The first phase controllable DC converter 4 is driven with a corrected duty ratio dr ₁ and the second phase second controllable DC converter 6 is driven with a corrected duty ratio dr ₂ . The flow end timing TEr ₁ of the first controllable DC converter 4 is set (step ST184), and the flow end timing TEr ₂ of the second phase second controllable DC converter 6 is set (step ST185). In the first embodiment, the average value is calculated from the acquired state of charge of each phase, and the correction value of the conduction rate of each phase is determined based on this, but the conduction rate is corrected. The method is not limited to this, and other means may be used.

As illustrated in FIG. 16, the process proceeds to the flow start process (step ST164) after the flow rate determination process (step ST163).
FIG. 19 is an example of a flowchart showing an outline of the processing procedure of the flow start processing (step ST164). In the first embodiment, the first controllable DC converter 4 of the first phase is controlled at a predetermined cycle C _1, the second controllable DC converter 6 of the second-phase first-controllability of the first phase As the control after C ₂ from the flow start timing of the DC converter 4, the flow start timing of the first controllable DC converter 4 of the first phase is TS ₁ , and the second controllable DC conversion of the second phase. the flowing start timing of the device 6 and TS _2. When the timer count is TS ₁ (step ST191), the first controllable DC converter 4 is controlled as a first phase flow start (step ST192). Also, the timer count is set to 0 at the first phase flow start timing (step ST193). When the timer count is TS ₂ (step ST194), the second controllable DC converter 6 is controlled as the start of second phase flow (step ST195). In the first embodiment, the first phase first controllable DC converter 4 is controlled with a predetermined cycle C ₁ , and the second phase second controllable DC converter 6 is connected to the first phase. Although control is performed after C ₂ from the flow start timing, the drive cycle of each phase may be variable according to the drive frequency of the inverter 2.

As illustrated in FIG. 16, the flow proceeds to the flow end process (step ST165) after the flow start process (step ST164).
FIG. 20 is an example of a flowchart showing an outline of the processing procedure of the flow end processing (step ST165). Control is performed based on the flow end timing determined in the flow rate determination process (step ST163). In FIG. 20, when the timer count is TEr ₁ (step ST201), the control device 7 controls the first controllable DC conversion device 3 as the first phase end of flow (step ST202). Further, when the timer count is TEr ₂ (step ST203), the second controllable DC converter 6 is controlled as the second phase end of flow (step ST204).

FIG. 21 is an example of a timing chart showing a flow control image of the first phase and the second phase in the first embodiment. In the first embodiment, the first phase first controllable DC converter 4 is controlled at a predetermined cycle C _1, the second controllable DC converter 6 of the second-phase first-controllability of the first phase It is controlled after C ₂ from the flow start timing of the DC converter 4. Further, in order to supply a predetermined voltage to the inverter 2, the first phase first controllable DC converter 4 has a predetermined conductivity d ₁ , and the second phase second controllable DC converter 6 has a predetermined the conduction ratio d ₂ is set in advance. Here, based on the charging state detection results 31 s and 51 s of the power supply devices 3 and 5 of each phase, the conduction ratio is corrected, respectively, and the first phase first controllable DC converter 4 has the corrected conduction ratio. The second controllable DC converter 6 of dr ₁ and the second phase is driven with the corrected conduction rate dr ₂ . In the control device 7, the first phase controllable DC conversion device 4 of the first phase is started to flow at TS ₁ , and the flow rate set from the flow rate dr ₁ corrected based on the state of charge of the first power supply device 3. The control to end the flow at the flow end timing TEr ₁ is repeated in the cycle C ₁ , and the second phase second controllable DC converter 6 flows in TS ₂ after C ₂ from the start of the first phase flow. Control is performed so as to end the flow at the flow end timing TEr ₂ set from the flow rate dr ₂ corrected based on the state of charge of the second power supply device 5. In the first embodiment, the number of phases is N = 2, but the configuration may be two or more. In the first embodiment, the first controllable DC converter 4 of the first phase is controlled at a predetermined cycle C _1, the second controllable DC converter 6 of the second phase flow of the first phase Although control is performed after C ₂ from the start timing, the drive cycle of the controllable DC converters 4 and 6 of each phase may be variable according to the drive frequency of the inverter 2.

  As described above, the control device includes the power supply state detection devices 31 and 51 for detecting the states of the power supply devices 3 and 5 of the respective phases, and controls the controllable DC converters 4 and 6 of the respective phases. 7 weights each phase based on the state of the power supply devices 3 and 5 detected by the power supply state detection devices 31 and 51 of each phase and the characteristics of the power supply devices 3 and 5, Since the duty ratios of the control DC converters 4 and 6 are corrected based on the weighting result, for example, the power supply device is intended to increase the total capacity without changing the total voltage of the power supply device in order to extend the cruising range of the electric vehicle. 3 and 5 are connected in parallel, and when these parallel-connected power supply devices 3 and 5 are not the same, but are different, more accurate voltage balance adjustment taking into account the states of the power supply devices 3 and 5 of each phase Each phase power supply Suitable power supply in consideration of state can be realized.

  In addition, in each figure, the same code | symbol shows the same or an equivalent part.

The above Reference Examples 1 and 2 and Embodiment 1 have the following features 1 to 25.
Feature 1: A vehicular drive power supply device including a plurality of power supply devices connected in parallel to perform electric power transfer via a rotating electrical machine mounted on a vehicle and an inverter, and each of the inverter and each power supply device A plurality of controllable DC converters connected in parallel to convert the power of the corresponding power supply device connected between them, and each of the controllable DC converters sends a predetermined drive power to the rotating electric machine via the inverter. It is a vehicle drive power supply device provided with the control apparatus which controls the timing of the start of flow of each said controllable DC converter, and a flow rate so that it may supply to.
Feature 2: The vehicle drive power supply device according to Feature 1, wherein each controllable DC converter supplies drive power to a common rotating electrical machine.
Feature 3: A vehicular drive power supply device including a plurality of power supply devices connected in parallel to each other through a rotating electrical machine mounted on a vehicle and an inverter, and each of the inverter and each power supply device A plurality of controllable DC converters connected in parallel to convert the power of the corresponding power supply device connected in between, and the controllable DC converters each supply a predetermined DC voltage to the inverter. It is a vehicle drive power supply device provided with the control apparatus which controls the timing of the start of flow of each controllable DC converter, and a flow rate.
Feature 4: The vehicle drive power supply device according to Feature 3, wherein each controllable DC converter supplies a DC voltage to a common inverter.
Feature 5: The vehicle drive power supply device according to any one of features 1 to 4, wherein each of the controllable DC converters is controlled synchronously by the control device. It is.
Feature 6: In the vehicle drive power supply device according to any one of features 1 to 5, the flow start timing and the flow rate are controlled in response to the drive timing of the inverter. It is a drive power supply device for vehicles.
Feature 7: In the vehicle drive power supply device according to any one of features 1 to 5, the flow start timing and the flow rate are controlled in response to the drive frequency of the inverter. It is a drive power supply device for vehicles.
Feature 8: The vehicle drive power supply device according to any one of features 1 to 7, further comprising a plurality of power supply state detection devices provided corresponding to the respective power supply devices and detecting states of the corresponding power supply devices. The drive power supply for a vehicle is characterized in that the flow rate of the corresponding controllable DC converter is controlled in accordance with the state of the corresponding power supply detected by each of the power supply status detection devices.
Feature 9: In the vehicle drive power supply device according to Feature 8, the control device weights each controllable DC converter based on the state of each power supply device detected by each power supply state detection device, and The vehicle drive power supply device is characterized in that the duty ratio of each controllable DC converter is corrected by weighting.
Feature 10: The vehicle drive power supply device according to feature 8 or feature 9, wherein the power supply device is in a charged state.
Feature 11: The vehicle drive power supply device according to feature 8 or feature 9, wherein the state of the power supply device is a characteristic of each of the power supply devices.
Feature 12: The vehicle drive power supply device according to claim 8 or 9, wherein the state of the power supply device is a deterioration state of each of the power supply devices.
Feature 13: The vehicle drive power supply device according to Feature 8 or 9, wherein the state of the power supply device is the temperature of each of the power supply devices.
Feature 14: The vehicle drive power supply device according to feature 8 or feature 9, wherein the state of the power supply device is an output performance of each of the power supply devices.

Feature 15: A drive power source for a vehicle that transmits and receives power via a rotating electric machine and an inverter device mounted on the vehicle, and for supplying driving power to the rotating electric machine via the inverter device and a power source device that stores electric power In addition, a controllable DC converter that converts the power of the power supply device by setting a step-up ratio by controlling the conduction rate, and a configuration in which the power supply device and the controllable DC converter are connected in series are one-phase. In an apparatus comprising a control device that connects two or more N phases in parallel and controls the flow of the first to Nth N-phase controllable DC converters, the N-phase controllability Each phase of the DC converter is controlled by the control device in synchronism with the start timing of the flow, and the control device passes through the controllable DC converter of each phase so as to supply desired power for each phase. To control the flow rate variably. A vehicle drive power source device according to symptoms.
Feature 16: The control device arbitrarily variably controls the flow start timing of the controllable DC converter of each phase, the control device acquires the drive timing of the inverter device, and the control device 16. The vehicular drive power supply device according to claim 15, wherein the flow start timing of each phase of the controllable DC converter is controlled in synchronization with the drive timing of the inverter device.
Feature 17: A power supply state detection device that detects a state of the power supply device of each phase, wherein the control device that controls the controllable DC converter of each phase is detected by the power supply state detection device of each phase Each phase is weighted based on the state of the power supply device of each phase or the characteristics of the power supply device, and the duty ratio of the controllable DC converter of each phase is corrected by the result of the weighting. Alternatively, the vehicle drive power supply device according to the feature 16 is provided.
Feature 18: The state of the power supply device detected by the power supply state detection device of each phase is a charge state of the power supply device of each phase, and the control device detects the power supply device of each phase detected by the power supply state detection device 18. The vehicular drive power supply device according to claim 17, wherein the conduction rate of the controllable DC converter of each phase is corrected by weighting each phase based on the state of charge.
Feature 19: The state of the power supply device detected by the power supply state detection device of each phase is a deterioration state of the power supply device of each phase, and the control device detects the power supply device of each phase detected by the power supply state detection device 18. The vehicular drive power supply device according to claim 17, wherein the conduction rate of the controllable DC converter of each phase is corrected based on a result of weighting each phase based on the deterioration state of the vehicle.
Feature 20: The state of the power supply device detected by the power supply state detection device of each phase is the temperature of the power supply device of each phase, and the control device detects the power supply device of each phase detected by the power supply state detection device. 18. The vehicular drive power supply device according to claim 17, wherein the conduction rate of the controllable DC converter of each phase is corrected by weighting each phase based on temperature.
Feature 21: The state of the power supply device detected by the power supply state detection device of each phase is the output performance of the power supply device of each phase, and the control device detects the power supply device of each phase detected by the power supply state detection device 18. The vehicular drive power supply device according to claim 17, wherein the conduction rate of the controllable DC converter of each phase is corrected based on the result of weighting each phase based on the output performance.

Feature 22: By adopting the means as described above, each phase of the N-phase controllable DC converter is controlled by the control device in synchronism with the start timing of the flow, and a desired power is supplied for each phase. Since the control device variably controls the flow rate of the controllable DC converter of each phase so as to supply, for example, the total voltage of the power supply device is not changed to extend the cruising range of the electric vehicle. When power supply units are connected in parallel for the purpose of raising capacity, and these power supply units are not the same but different, the timing of starting the flow of each phase connected in parallel is specified, and the current flow rate of each phase Therefore, it is easy to balance the voltage of the power supply devices of each phase even if they are arranged in parallel, and a desired stable power supply from each phase can be realized. In addition, ripples can be reduced even in parallel, and the capacity of the smoothing capacitor of the controllable DC converter can be reduced, so that the size and cost of the device can be reduced.
Feature 23: The control device arbitrarily variably controls the flow start timing of the controllable DC converter of each phase, the control device acquires the drive timing of the inverter device, and the control device Since the flow start timing of each phase controllable DC converter is controlled in synchronization with the drive timing of the inverter device, the total voltage of the power supply device is changed to extend the cruising range of the electric vehicle, for example. In order to increase the total capacity without connecting the power supply devices in parallel and these power supply devices are not the same but different, in order to control the flow rate of each phase in conjunction with the drive timing of the inverter device, It is possible to realize a desired stable power supply from each phase to the inverter device, and to easily balance the voltage of each phase in parallel. In addition, since the controllable DC converter performs conduction rate control in conjunction with the drive timing of the inverter device, the inverter device performs control to invert the polarity of the input signal from the controllable DC converter, and the conventional pulse Compared with the width modulation method, the function and configuration of the inverter device can be simplified.
Feature 24: A power supply state detection device that detects a state of the power supply device of each phase, wherein the control device that controls the controllable DC converter of each phase is detected by the power supply state detection device of each phase Each phase is weighted based on the state of the power supply device of each phase or the characteristics of the power supply device, and the continuity of the controllable DC converter of each phase is corrected by the result of the weighting. In order to increase the total capacity without changing the total voltage of the power supply unit to extend the possible distance, connect the power supply units in parallel, and when these power supply units are not the same but different, the status of the power supply units for each phase In consideration of the above, it is possible to realize a more accurate voltage balance adjustment and to realize a suitable power supply in consideration of the power state of each phase.
Feature 25: Also, the state of the power supply device detected by the power supply state detection device of each phase is a charge state of the power supply device of each phase, and the control device detects the state of each phase detected by the power supply state detection device. Since the duty ratio of the controllable DC converter of each phase is corrected based on the result of weighting each phase based on the state of charge of the power supply, for example, the total voltage of the power supply for extending the cruising range of an electric vehicle Even if the power supply devices are connected in parallel for the purpose of raising the total capacity without changing the power supply, and the power supply devices are charged in different phases, such as those that are fully charged and discharged, for example, the control device Thus, by correcting and controlling the conduction rate of the controllable DC converter of each phase, it is possible to adjust the output balance of each phase and stably supply power to the inverter device.
Feature 26: The state of the power supply device detected by the power supply state detection device of each phase is a deterioration state of the power supply device of each phase, and the control device detects the power supply device of each phase detected by the power supply state detection device For example, the total voltage of the power supply device is changed to extend the cruising range of an electric vehicle because the duty ratio of the controllable DC converter of each phase is corrected based on the result of weighting each phase based on the deterioration state of the vehicle. Even if the power supply units are connected in parallel for the purpose of increasing the total capacity, and the power supply units are deteriorated in different phases, such as new ones and those that have been used for a long time. By correcting and controlling the conduction rate of the controllable DC converter, the output balance of each phase can be adjusted and power can be stably supplied to the inverter device.
Feature 27: The state of the power supply device detected by the power supply state detection device of each phase is the temperature of the power supply device of each phase, and the control device detects the power supply device of each phase detected by the power supply state detection device. Since the conduction rate of the controllable DC converter of each phase is corrected based on the result of weighting each phase based on the temperature, for example, without changing the total voltage of the power supply device for extending the cruising range of the electric vehicle For the purpose of raising the total capacity, power supply devices are connected in parallel, and even if the power supply devices have different temperatures due to factors such as differences in mounting position, the control device can control each phase of the DC converter. By correcting and controlling the current flow rate, the output balance of each phase can be adjusted and power can be stably supplied to the inverter device.
Feature 28: The state of the power supply device detected by the power supply state detection device of each phase is the output performance of the power supply device of each phase, and the control device detects the power supply device of each phase detected by the power supply state detection device For example, the total voltage of the power supply device is changed to extend the cruising range of an electric vehicle because the duty ratio of the controllable DC converter of each phase is corrected based on the result of weighting each phase based on the output performance of the vehicle. Even if power supplies are connected in parallel for the purpose of increasing the total capacity, and these power supplies combine power supplies with different output performance in each phase, such as lithium ion batteries and electric double layer capacitors, By correcting and controlling the conduction rate of the controllable DC converter of each phase, the output balance of each phase can be adjusted and power can be stably supplied to the inverter device.

1 Permanent magnet type AC synchronous motor, 2 Inverter,
2s drive frequency of the inverter, 3 first power supply,
3s 1st power supply device state detection signal, 31 1st power supply charge state detection device,
31s Charging state information of the first power supply device, 4 first controllable DC converter,
5 Second power supply device, 5s Second power supply state detection signal,
51 2nd power supply charge condition detection apparatus, 51s The charge condition information of a 2nd power supply apparatus,
6 Second controllable DC converter, 7 Control device.

Claims (7)

A vehicular drive power supply device including a plurality of power supply devices connected in parallel to each other to perform power transfer via a rotating electric machine and an inverter mounted on a vehicle,
A plurality of controllable DC converters connected in parallel to each other, each connected between the inverter and each power supply device and converting the power of the corresponding power supply device;
The controllable DC converters periodically pass power to the inverter, and the controllable DC converters supply predetermined drive power to the rotating electrical machine via the inverter. A control device that variably controls the flow rate of each controllable DC converter, and a plurality of power supply state detection devices that are provided corresponding to the respective power supply devices and detect the state of the corresponding power supply device,
A vehicle drive power supply device in which a conduction rate of a corresponding controllable DC converter is controlled by the control device in accordance with the state of the corresponding power supply device detected by each of the power supply state detection devices. In the vehicle drive power supply device according to claim 1,
Based on the state of each power supply device detected by each power supply state detection device, the control device weights each controllable DC conversion device, and the weighting rate of each controllable DC conversion device is corrected by the weighting. A drive power supply device for a vehicle. In the vehicle drive power supply device according to claim 1 or 2,
A vehicle drive power supply device, wherein the power supply device is in a charged state. In the vehicle drive power supply device according to claim 1 or 2,
A drive power supply for a vehicle, wherein the state of the power supply is a characteristic of each power supply. In the vehicle drive power supply device according to claim 1 or 2,
The vehicle drive power supply device, wherein the power supply device is in a deteriorated state. In the vehicle drive power supply device according to claim 1 or 2,
The vehicle drive power supply device characterized in that the state of the power supply device is the temperature of each of the power supply devices. In the vehicle drive power supply device according to claim 1 or 2,
The vehicle drive power supply device, wherein the state of the power supply device is an output performance of each of the power supply devices.