CN101512364A - Accumulator degradation evaluating system, vehicle, accumulator degradation evaluation method, and computer-readable recording medium containing program for causing computer to execute the degradation - Google Patents

Abstract

The deterioration evaluation system (100) includes: a vehicle (10) equipped with an electric storage device, a charging station (30), a connecting wire (20) for connecting the vehicle (10) to the charging station (30), and a server (40) ). A vehicle (10) can charge a power storage device from a charging station (30). A charging station (30) includes a degradation evaluation device (32). The deterioration evaluation device (32) collects data such as voltage, charging current, and temperature of the power storage device when the power storage device is charged from the charging station (30), and uses the collected data and data for evaluation acquired from the server (40) The state of deterioration of the power storage device was evaluated.

Description

Deterioration evaluation system for electric storage device, vehicle, method for evaluating deterioration of electric storage device, and computer-readable storage medium storing program for causing computer to execute the deterioration evaluation method

technical field

The present invention relates to a technique for evaluating the state of deterioration of a power storage device mounted on a vehicle.

Background technique

Japanese Patent Application Laid-Open No. 2004-014403 discloses a secondary battery deterioration determination device. The degradation judging device includes: a load history estimating unit that estimates a history of a load on the secondary battery based on a current flowing through the secondary battery; When it is approximately 0 and the load history estimated by the load history estimating unit is within a range that can be regarded as a predetermined history, it is determined that the secondary battery has deteriorated based on the inter-terminal voltage of the secondary battery.

According to this degradation determination device, the degradation determination of the secondary battery is performed only when the load history of the secondary battery is within the range that can be regarded as a predetermined history, so accurate degradation determination can be performed.

In the degradation determination device disclosed in Japanese Patent Laid-Open No. 2004-014403 mentioned above, the degradation determination of the secondary battery is performed when the load history of the secondary battery is within the range that can be regarded as a predetermined history. When determining the deterioration of a secondary battery of an electric vehicle such as an automobile or a hybrid vehicle, it is conceivable that there is little chance that the load history of the secondary battery becomes a specific history during travel.

In particular, in the case of a hybrid vehicle using a motor and an engine as power sources, when the driving force of the vehicle is generated by the driving motor and the engine is started using the generating motor, the secondary battery is discharged. The secondary battery is charged during regenerative power generation by the motor for generating power from the engine and during regenerative braking by the motor for driving. In this way, in a hybrid vehicle, the secondary battery is frequently charged and discharged according to the running state of the vehicle, so the degradation determination device disclosed in the above-mentioned publication cannot sufficiently evaluate the degradation state of the secondary battery. possibility.

In addition, by appropriately displaying the transition of such a state of deterioration of the secondary battery to the user, the user can grasp the state of deterioration of the secondary battery and use the vehicle while considering the state of deterioration, which can be beneficial when the user uses the vehicle. Information.

Contents of the invention

Therefore, the present invention was made to solve this problem, and an object of the present invention is to provide a degradation evaluation system and a vehicle that can reliably evaluate the degradation state of a power storage device mounted on a vehicle.

Another object of the present invention is to provide a degradation evaluation system and a vehicle capable of appropriately displaying the degradation state of a power storage device mounted on a vehicle to a user.

In addition, another object of the present invention is to provide a degradation evaluation method capable of reliably evaluating the degradation state of a power storage device mounted on a vehicle, and a computer-readable storage device storing a program for causing a computer to execute the degradation evaluation method. medium.

In addition, another object of the present invention is to provide a degradation evaluation method capable of appropriately displaying the degradation state of a power storage device mounted on a vehicle to a user, and a computer-readable device storing a program for causing a computer to execute the degradation evaluation method. selected storage medium.

According to the present invention, there is provided a degradation evaluation system for a power storage device mounted on a vehicle, including a vehicle and a degradation evaluation device. The vehicle is configured to be able to supply and receive electric power between the power storage device and a power source or an electric load external to the vehicle. The deterioration evaluation device evaluates the deterioration state of the electric storage device using data collected when electric power is supplied and received between the electric storage device and a power source or an electric load external to the vehicle.

Preferably, the deterioration evaluation device evaluates the state of deterioration of the power storage device using data collected when the power storage device is charged from a power source external to the vehicle.

Preferably, the vehicle includes a power conversion device, a connection device and a control device. The power conversion device is configured to be able to convert power between the power storage device and a power source or an electric load outside the vehicle. The connection device is configured to be able to electrically connect the power conversion device to a power source or an electric load outside the vehicle. The control device controls the power conversion device. In addition, the control device controls the power conversion device under certain conditions at least when collecting data.

More preferably, the control device controls the power conversion device so that the electric power supplied and received between the power storage device and a power source or an electric load outside the vehicle becomes larger than a predetermined value at the time of data collection.

Preferably, the degradation evaluation device evaluates the degradation state of the power storage device when the vehicle or its surrounding environment satisfies a predetermined condition.

Preferably, the degradation evaluation device further includes a charging mode selection unit and a display unit. The charging mode selection unit is capable of selecting a normal charging mode in which the power storage device is charged from a power source outside the vehicle at a first charging rate, and a normal charging mode in which the power storage device is charged from a power source outside the vehicle at a second charging rate higher than the first charging rate. Any one of the rapid charging modes. The display unit can display the deterioration state of the power storage device when charging in the normal charging mode and the deterioration state of the power storage device when charging in the rapid charging mode.

More preferably, the display unit displays the state of charge of the power storage device when the power storage device is charged from a power source external to the vehicle, and displays a transition in a state of degradation of the power storage device in conjunction with a change in the state of charge.

In addition, according to the present invention, there is provided a vehicle capable of supplying and receiving electric power to and from a power source or an electric load outside the vehicle, and including a power storage device, a power conversion device, a connection device, and a degradation evaluation device. The power conversion device is configured to be able to convert power between the power storage device and a power source or an electric load outside the vehicle. The connection device is configured to be able to electrically connect the power conversion device to a power source or an electric load outside the vehicle. The deterioration evaluation device evaluates the degradation state of the power storage device using data collected when electric power is supplied and received between the power storage device and a power source or an electric load outside the vehicle via a connection device.

Preferably, the deterioration evaluation device evaluates the state of deterioration of the power storage device using data collected when the power storage device is charged from a power source external to the vehicle.

Preferably, the vehicle further includes a control device that controls the power conversion device. The control device controls the power conversion device under certain conditions at least when collecting data.

More preferably, the control device controls the power conversion device so that the electric power supplied and received between the power storage device and a power source or an electric load outside the vehicle becomes larger than a predetermined value at the time of data collection.

Preferably, the degradation evaluation device evaluates the degradation state of the power storage device when the vehicle or its surrounding environment satisfies a predetermined condition.

Preferably, the vehicle further includes a charging mode selection unit and a display device. The charging mode selection unit is capable of selecting a normal charging mode in which the power storage device is charged from a power source outside the vehicle at a first charging rate, and a normal charging mode in which the power storage device is charged from a power source outside the vehicle at a second charging rate higher than the first charging rate. Any one of the rapid charging modes for charging. The display device can display the deterioration state of the power storage device when charging in the normal charging mode and the deterioration state of the power storage device when charging in the rapid charging mode.

More preferably, the display device displays the state of charge of the power storage device when the power storage device is charged from a power source external to the vehicle, and displays the transition of the degradation state of the power storage device in conjunction with the transition of the state of charge.

In addition, according to the present invention, there is provided a degradation evaluation method, which is a degradation evaluation method of a power storage device mounted on a vehicle. The vehicle is configured to be able to supply and receive electric power between the power storage device and a power source or an electric load external to the vehicle. Furthermore, the degradation evaluation method includes: a first step of collecting data for evaluating a deterioration state of the power storage device when power is supplied and received between the power storage device and a power source or an electric load outside the vehicle; and using the collected data The second step of evaluating the deterioration state of the power storage device.

Preferably, in the first step, the data is collected when the power storage device is charged from a power source outside the vehicle.

Preferably, the vehicle includes a power conversion device and a connection device. The power conversion device is configured to be able to convert power between the power storage device and a power source or an electric load outside the vehicle. The connection device is configured to be able to electrically connect the power conversion device to a power source or an electric load outside the vehicle. Furthermore, the degradation evaluation method further includes a third step of controlling the power conversion device under a certain condition at least when collecting data.

More preferably, in the third step, the power conversion device is controlled so that the electric power supplied and received between the power storage device and a power source or electric load outside the vehicle is larger than a predetermined value during data collection.

Preferably, the degradation evaluation method further includes a fourth step of determining whether the vehicle or its surrounding environment satisfies a predetermined condition. Then, when it is determined that the environment satisfies the predetermined condition, the deterioration state of the power storage device is evaluated in the second step.

Preferably, the degradation evaluation method further includes the fifth and sixth steps. In the fifth step, a normal charging mode for charging the power storage device at a first charging rate from a power source outside the vehicle and a normal charging mode for charging the power storage device from a power source outside the vehicle at a second charging rate higher than the first charging rate are selected. Any one of the rapid charging modes for charging. In the sixth step, at least one of the deterioration state of the power storage device when charging in the normal charging mode and the deterioration state of the power storage device when charging in the rapid charging mode is displayed.

More preferably, when the power storage device is charged from a power source external to the vehicle, in the sixth step, the state of charge of the power storage device is displayed, and the state of deterioration of the power storage device is displayed in conjunction with the transition of the state of charge. pass.

Also, according to the present invention, there is provided a computer-readable storage medium storing a program for causing a computer to execute any one of the degradation evaluation methods described above.

In the present invention, the vehicle is configured to be able to supply and receive electric power between a power storage device mounted on the vehicle and a power source or an electric load outside the vehicle. Furthermore, since the degradation evaluation device evaluates the deterioration state of the power storage device using data collected when power is supplied and received between the power storage device and a power source or electric load outside the vehicle, it is possible to evaluate the power storage device using data collected under stable conditions. The degraded state of the device.

Therefore, according to the present invention, it is possible to reliably evaluate the state of degradation of the power storage device mounted on the vehicle. In addition, it is possible to accurately evaluate the state of deterioration of the power storage device.

In addition, in the present invention, either one of the normal charging mode and the rapid charging mode can be selected, and the deterioration state of the power storage device when charging in the normal charging mode and the state of deterioration of the power storage device when charging in the rapid charging mode can be displayed. state of deterioration.

Therefore, according to the present invention, the deterioration state of the power storage device mounted on the vehicle can be appropriately displayed to the user. As a result, the user can select the charging mode when charging the power storage device from the power supply outside the vehicle in consideration of the deterioration state of the secondary battery.

Description of drawings

FIG. 1 is an overall diagram of a degradation evaluation system according to Embodiment 1 of the present invention;

Fig. 2 is a functional block diagram of the deterioration evaluation device shown in Fig. 1;

FIG. 3 is a diagram showing an example of degradation evaluation displayed on the display unit shown in FIG. 2;

Fig. 4 is a flow chart for explaining the control structure of the degradation evaluation device shown in Fig. 1;

Fig. 5 is a schematic structural diagram of the vehicle shown in Fig. 1;

Fig. 6 is a functional block diagram of the power output device shown in Fig. 5;

FIG. 7 is a zero-phase equivalent circuit diagram (zero-phase equivalent circuit diagram) of the converter (inverter, inverter) shown in FIG. 6 and the motor generator;

8 is a diagram showing degradation evaluation displayed on a display unit of Modification 1 of Embodiment 1;

9 is a graph showing the charge rate of the power storage device according to Modification 2 of Embodiment 1;

10 is a diagram showing degradation evaluation displayed on a display unit of Modification 2 of Embodiment 1;

FIG. 11 is a flowchart illustrating a control structure of a deterioration evaluation device according to Modification 2 of Embodiment 1;

FIG. 12 is a flowchart illustrating a control structure of a degradation evaluation device according to Modification 3 of Embodiment 1;

13 is a functional block diagram of a degradation evaluation device according to Modification 4 of Embodiment 1;

FIG. 14 is a diagram showing the travelable time and the travelable distance of the vehicle;

15 is a schematic configuration diagram of a vehicle according to Embodiment 2;

16 is a schematic configuration diagram of a vehicle according to Embodiment 3;

Fig. 17 is a functional block diagram of the vehicle ECU shown in Fig. 16;

18 is a functional block diagram of a degradation evaluation device according to Embodiment 4;

19 is a flowchart for explaining the control structure of the degradation evaluation device according to Embodiment 4;

FIG. 20 is a diagram showing an example of a display state when charging is performed in the rapid charging mode;

FIG. 21 is a diagram showing an example of a display state during charging;

22 is a schematic configuration diagram of a vehicle according to Embodiment 5;

Fig. 23 is a functional block diagram of the vehicle ECU shown in Fig. 22 .

Detailed ways

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code|symbol is attached|subjected to the same or corresponding part in a drawing, and the description is not repeated.

[Embodiment 1]

FIG. 1 is an overall view of a degradation evaluation system according to Embodiment 1 of the present invention. Referring to FIG. 1 , a degradation evaluation system 100 includes: a vehicle 10 , a charging station 30 , and a server 40 (server).

The vehicle 10 is an electric vehicle equipped with a power storage device and a motor as a power source, and is constituted by, for example, an electric vehicle, a hybrid vehicle, or the like. In addition, in the first embodiment, the case of a hybrid vehicle in which the power storage device is frequently charged and discharged will be described in particular. The vehicle 10 can be connected to the charging station 30 via the connecting wire 20 , and can receive the supply of electric power from the charging station 30 to charge the power storage device as will be described later.

Connection wire 20 is a power wire for supplying charging power from charging station 30 to vehicle 10 . In addition, the connecting wire 20 is also used as a data communication medium between the charging station 30 and the vehicle 10 . Charging station 30 is a device for charging the power storage device of vehicle 10 connected by connecting wire 20 , and supplies electric power from a commercial (industrial) power system (not shown) to vehicle 10 via connecting wire 20 .

The charging station 30 includes a degradation evaluation device 32 , a current sensor 34 and a voltage sensor 36 . Current sensor 34 detects a current Is supplied from charging station 30 to vehicle 10 . Voltage sensor 36 detects voltage Vs output from charging station 30 to vehicle 10 . Deterioration evaluation device 32 evaluates the state of degradation of the power storage device of vehicle 10 using various data collected by current sensor 34 , voltage sensor 36 , and vehicle 10 when vehicle 10 is charged from charging station 30 .

The server 40 has evaluation data for evaluating the deterioration state of the power storage device of the vehicle that can be connected to the charging station 30, which is different according to the type of vehicle, and outputs and connects to the deterioration evaluation device 32 according to the request from the deterioration evaluation device 32. Evaluation data corresponding to the vehicle 10 on the charging station 30 . In addition, the server 40 may not be provided, and the above-mentioned data for evaluation may be provided in the charging station 30 .

FIG. 2 is a functional block diagram of the degradation evaluation device 32 shown in FIG. 1 . Referring to FIG. 2 , the degradation evaluation device 32 includes a data acquisition unit 52 , a degradation evaluation unit 54 , a storage unit 56 , and a display unit 58 .

Data acquisition unit 52 acquires current Is and voltage Vs from current sensor 34 and voltage sensor 36 , respectively, and determines whether vehicle 10 is being charged from charging station 30 based on the connection state of connecting wire 20 and the acquired current Is and voltage Vs. Then, when the vehicle 10 is being charged, the data acquisition unit 52 activates the flag FLG output to the vehicle 10 via the connection wire 20 within a predetermined period (for example, within a predetermined period after a predetermined time elapses from the start of charging). (activate, activate). Here, flag FLG is a signal for instructing to transmit various data collected for evaluating the degradation state of the power storage device mounted on vehicle 10 to degradation evaluation device 32 . In addition, the collected data include, for example, the voltage Vb, charging current Ib, and temperature Tb of the power storage device mounted on the vehicle 10 . Then, when the data acquisition unit 52 receives the response signal ACK corresponding to the activation of the flag FLG from the vehicle 10 , it acquires the data transmitted from the vehicle 10 via the connecting wire 20 .

Deterioration evaluation unit 54 calculates degradation data capable of evaluating the degradation state of the power storage device of vehicle 10 using the data acquired by data acquisition unit 52 . Specifically, the degradation evaluation unit 54 calculates the charging efficiency using the collected data acquired by the data acquisition unit 52 . Here, charging efficiency refers to the ratio of the amount of electric power actually charged to the power storage device of vehicle 10 to the power amount supplied from charging station 30 to vehicle 10 , and charging efficiency decreases as the power storage device deteriorates.

In addition, degradation evaluation unit 54 acquires evaluation data for evaluating the degradation state of the power storage device of vehicle 10 from server 40 based on the identification code ID of vehicle 10 . Specifically, the evaluation data includes a first charging efficiency level value indicating that the deterioration of the power storage device has progressed to a considerable extent, and a second charging efficiency level value indicating that an overhaul of the power storage device is required. Then, the degradation evaluation unit 54 associates the calculated degradation data and the evaluation data acquired from the server 40 with the identification code ID of the vehicle 10 and the date and time of data collection, and outputs them to the storage unit 56 .

The storage unit 56 is composed of a non-volatile memory, and associates the degradation data and evaluation data received from the degradation evaluation unit 54 with the identification code ID and data collection date and time every time the vehicle 10 is charged from the charging station 30 . store.

The display unit 58 reads data corresponding to the vehicle 10 from the storage unit 56 based on the identification code ID of the vehicle 10 (including not only the data at the time of current charging, but also the data at the time of past charging.), and displays it to the user. The read data. In addition, display unit 58 also predicts the future deterioration state based on the current and past charging data, and displays the prediction result. For example, the future deterioration state can be predicted by performing extrapolation (interpolation) calculation on the regression curve calculated using the current and past charging data.

FIG. 3 is a diagram showing an example of degradation evaluation displayed on the display unit 58 shown in FIG. 2 . Referring to FIG. 3 , the vertical axis represents the charging efficiency when charging the vehicle 10 from the charging station 30 , and the horizontal axis represents time (the unit is day). The solid line represents the change of charging efficiency so far, and the dotted line represents the change of future charging efficiency predicted based on the previous change of charging efficiency. In addition, time t0 corresponds to the present.

The first level LV1 and the second level LV2 correspond to the evaluation data acquired from the server 40. The first level LV1 is a level indicating that the deterioration of the power storage device has progressed to a considerable extent, and the second level LV2 is a level indicating that the power storage device is required. The maintenance level (level). Thereby, the user can recognize the deterioration state of the power storage device.

FIG. 4 is a flowchart for explaining the control structure of the degradation evaluation device 32 shown in FIG. 1 . In addition, the processing of this flowchart is called and executed from the main routine at regular intervals or every time a predetermined condition is satisfied.

4 and 1 , degradation evaluation device 32 determines whether vehicle 10 is being charged from charging station 30 based on the connection state of connecting wire 20 and the detection values of current sensor 34 and voltage sensor 36 (step S10 ). When the deterioration evaluation device 32 determines that the battery is not being charged (NO in step S10 ), the process proceeds to step S80 .

On the other hand, when it is determined in step S10 that charging is in progress (YES in step S10 ), degradation evaluation device 32 determines whether to perform data collection for evaluating the degradation state of the power storage device (step S20 ). In addition, as described above, data collection is performed for a predetermined period (for example, a predetermined period after a predetermined time elapses from the start of charging).

Then, when the degradation evaluation device 32 determines that data collection is to be performed (YES in step S20), it activates the flag FLG, and when the response signal ACK is activated, acquires the The voltage Vb, charging current Ib, and temperature Tb of the power storage device on the vehicle 10 are obtained from the current sensor 34 and the voltage sensor 36, respectively, from the current Is and the voltage Vs (step S30). In addition, the degradation evaluation device 32 also acquires the identification code ID of the vehicle 10 connected to the charging station 30 from the vehicle 10 . On the other hand, when it is determined in step S20 that data collection is not to be performed (NO in step S20), the degradation evaluation device 32 advances the process to step S40.

Next, the degradation evaluation device 32 determines whether or not the data collection has been completed (step S40). When the deterioration evaluation device 32 determines that the data collection has not been completed (NO in step S40 ), the process proceeds to step S80 .

On the other hand, when it is determined in step S40 that the data collection has ended (YES in step S40 ), the degradation evaluation device 32 acquires evaluation data corresponding to the vehicle 10 from the server 40 (step S50 ). Then, after acquiring the evaluation data, the degradation evaluation device 32 evaluates the degradation state of the power storage device of the vehicle 10 using the data collected in step S30 (step S60 ). Specifically, the degradation evaluation device 32 calculates degradation data (charging efficiency in the first embodiment) capable of evaluating the degradation state of the power storage device using the data collected in step S30.

Then, the degradation evaluation device 32 displays the degradation data calculated in the past charging, the future degradation prediction data, and the evaluation data acquired from the server 40 together with the degradation data calculated in the current charging. The user displays the transition of the deterioration state of the power storage device (step S70).

FIG. 5 is a schematic configuration diagram of the vehicle 10 shown in FIG. 1 . 5, the vehicle 10 includes: a power output device 110, a modem 130, a vehicle ECU (Electronic Control Unit) 140, power lines ACL1, ACL2, and a connector 150. In addition, electric power lines ACL1 and ACL2 correspond to connection line 20 shown in FIG. 1 .

The power output device 110 outputs the driving force of the vehicle 10 . In addition, when the signal AC from the vehicle ECU 140 is activated, the power output device 110 converts the commercial power (charging power) transmitted from the charging station 30 (not shown) connected to the connector 150 to the power lines ACL1 and ACL2 into A power storage device (not shown) is charged by DC power. In addition, when charging the power storage device, power output device 110 charges the power storage device at a constant charging rate based on current command IR from vehicle ECU 140 . The structure of the power output device 110 will be described later. Modem 130 is connected to power lines ACL1, ACL2 and is a communication device for performing data communication with charging station 30 connected to connector 150 via power lines ACL1, ACL2.

Vehicle ECU 140 inactivates signal AC to be output to power output device 110 when connector 150 is not connected to charging station 30 and the vehicle can run, and generates a signal AC of the motor generator included in power output device 110 . The torque command values TR1 , TR2 , and the generated torque command values TR1 , TR2 are output to the power output device 110 .

Also, when charging the power storage device in power output device 110 from charging station 30 , vehicle ECU 140 activates signal AC, generates a current command IR that is a target value of the charging current from charging station 30 , and sends it to power output device 110 . output.

Furthermore, vehicle ECU 140 outputs response signal ACK to charging stand 30 via modem 130 when flag FLG received by modem 130 from charging stand 30 is activated during charging of the power storage device. Then, vehicle ECU 140 collects voltage Vb, charging current Ib, and temperature Tb of the power storage device in power output device 110 , and transmits them to charging station 30 via modem 130 . In addition, vehicle ECU 140 transmits the identification code ID of vehicle 10 to charging stand 30 .

FIG. 6 is a functional block diagram of the power output device 110 shown in FIG. 5 . Referring to FIG. 6 , power output device 110 includes engine 204 , motor generators MG1 , MG2 , power distribution mechanism 203 , and wheels 202 . In addition, power output device 110 also includes: power storage device B, voltage step-up converter 210 (voltage step-up converter), inverters 220, 230, MG-ECU 240, capacitors C1, C2, positive pole lines PL1, PL2, and negative pole Lines NL1, NL2. Furthermore, the power output device 110 further includes: voltage sensors 252 , 258 , current sensors 254 , 260 , and a temperature sensor 256 .

Power split mechanism 203 is coupled to engine 204 and motor generators MG1, MG2 to distribute power between them. For example, as the power distribution mechanism 203, a planetary gear having three rotation shafts of a sun gear, a carrier, and a ring gear can be used.

Motor generator MG1 operates as a generator driven by engine 204 and operates as an electric motor capable of starting engine 204, and is incorporated in power output device 110. Motor generator MG2 functions as an electric motor that drives wheels 202 that are drive wheels. It is assembled in the power output device 110 .

Motor generators MG1 and MG2 each include Y-connected three-phase coils (not shown) as stator coils. Further, a power line ACL1 is connected to a neutral point N1 of the three-phase coils of the motor generator MG1, and a power line ACL2 is connected to a neutral point N2 of the three-phase coils of the motor generator MG2.

Power storage device B is a chargeable DC power supply, and is composed of, for example, a secondary battery such as a nickel metal hydride battery or a lithium ion battery. Power storage device B outputs DC power to boost converter 210 . In addition, power storage device B is charged by receiving the electric power output from boost converter 210 .

Capacitor C1 smoothes the voltage variation between positive line PL1 and negative line NL1 . Boost converter 210 boosts a DC voltage received from power storage device B based on signal PWC from MG-ECU 240 , and outputs the boosted boosted voltage to positive line PL2 . Also, boost converter 210 steps down the DC voltage received from inverters 220 and 230 via positive line PL2 to the level of power storage device B based on signal PWC to charge power storage device B. Boost converter 210 is constituted by, for example, a buck-boost type chopper circuit or the like.

Capacitor C2 smoothes the voltage variation between positive line PL2 and negative line NL2 . Inverter 220 converts the DC voltage received from positive line PL2 into a three-phase AC voltage based on signal PWM1 from MG-ECU 240 , and outputs the converted three-phase AC voltage to motor generator MG1 . Also, inverter 220 converts the three-phase AC voltage generated by motor generator MG1 receiving the output of engine 204 into a DC voltage based on signal PWM1 , and outputs the converted DC voltage to positive line PL2 .

Inverter 230 converts a DC voltage received from positive line PL2 into a three-phase AC voltage based on signal PWM2 from MG-ECU 240 , and outputs the converted three-phase AC voltage to motor generator MG2 . Accordingly, motor generator MG2 is driven to generate a predetermined torque. Also, during regenerative braking of the vehicle, inverter 230 converts, based on signal PWM2 , the three-phase AC voltage generated by motor generator MG2 receiving the rotational force from wheels 202 into a DC voltage, and supplies the converted DC voltage to the positive line. PL2 output.

Also, when charging power storage device B using commercial power supplied from charging station 30 (not shown), inverters 220 and 230 assign a neutral point voltage from charging station 30 via power lines ACL1 and ACL2 based on signals PWM1 and PWM2 . The commercial electric power of N1 and N2 is converted into DC power, and the converted DC power is output to positive line PL2.

Motor generators MG1 and MG2 are three-phase AC motors, and are composed of, for example, three-phase AC synchronous motors. Motor generator MG1 generates a three-phase AC voltage using the output of engine 204 , and outputs the generated three-phase AC voltage to inverter 220 . In addition, motor generator MG1 generates driving force by the three-phase AC voltage received from inverter 220 to start engine 204 . Motor generator MG2 generates driving torque of the vehicle by the three-phase AC voltage received from inverter 230 . In addition, motor generator MG2 generates a three-phase AC voltage and outputs it to inverter 230 during regenerative braking of the vehicle.

Voltage sensor 252 detects voltage Vb of power storage device B, and outputs the detected value to vehicle ECU 140 (not shown). Current sensor 254 detects charging current Ib of power storage device B, and outputs the detected value to vehicle ECU 140 . Temperature sensor 256 detects temperature Tb of power storage device B, and outputs the detected value to vehicle ECU 140 . Voltage sensor 258 detects voltage Vac between power lines ACL1 and ACL2 , and outputs the detected value to MG-ECU 240 . Current sensor 260 detects current Iac flowing through power line ACL2 and outputs the detected value to MG-ECU 240 .

When signal AC from vehicle ECU 140 is deactivated, MG-ECU 240 generates a signal PWC for driving boost converter 210 and a signal for driving inverter 220 , Signals PWM1 and PWM2 at 230 output the generated signals PWC, PWM1 and PWM2 to boost converter 210 and inverters 220 and 230 , respectively.

Also, when signal AC from vehicle ECU 140 is activated, MG-ECU 240 generates signals PWM1 , PWM2 , and PWC for respectively controlling inverters 220 , 230 and boost converter 210 so as to transfer power from charging station 30 via power line ACL1 , ACL2, and the commercial power transmitted to neutral points N1, N2 is converted into DC power to charge power storage device B.

Also, when charging power storage device B from charging station 30 , MG-ECU 240 controls inverters 220 and 230 based on voltage Vac from voltage sensor 258 and current Iac from current sensor 260 so that the power supplied from charging station 30 The current matches current command IR from vehicle ECU 140 .

FIG. 7 shows a zero-phase equivalent circuit of inverters 220 and 230 and motor generators MG1 and MG2 shown in FIG. 6 . In each of inverters 220 and 230 which are three-phase inverters, there are eight patterns of on/off combinations of six transistors. The phase-to-phase voltage of 2 of the 8 switching modes is 0, and such a voltage state is called a zero voltage vector (zero voltage vector). For the zero voltage vector, the three transistors of the upper arm can be regarded as being in the same switching state (all on or off), and the three transistors of the lower arm can also be regarded as being in the same switching state. Therefore, in FIG. 7 , the three transistors on the upper arm of inverter 220 are collectively shown as upper arm 220A, and the three transistors on the lower arm of inverter 220 are collectively shown as lower arm 220B. Similarly, the three transistors of the upper arm of inverter 230 are collectively indicated as upper arm 230A, and the three transistors of the lower arm of inverter 230 are generally indicated as lower arm 230B.

As shown in FIG. 7 , this zero-phase equivalent circuit can be regarded as a single-phase PWM converter for inputting single-phase AC commercial power transmitted to neutral points N1 and N2 via power lines ACL1 and ACL2 . Therefore, by changing the zero-voltage vector in each of inverters 220, 230 and switching control inverters 220, 230 so that each phase arm of a single-phase PWM converter operates separately, the power input from power lines ACL1, ACL2 can be AC commercial power is converted into DC power and output to positive line PL2.

Referring again to FIG. 5 , in this vehicle 10 , power storage device B in power output device 110 can be charged from charging station 30 connected to connector 150 . The charging current from charging station 30 can be arbitrarily controlled based on current command IR, but vehicle ECU 140 generates current so as to perform charging at least at a constant charging rate while flag FLG received from charging station 30 via modem 130 is activated. Instruction IR.

Then, when flag FLG is activated, vehicle ECU 140 collects voltage Vb, charging current Ib, and temperature Tb of power storage device B, and transmits the collected data to charging station 30 via modem 130 .

That is, when charging power storage device B from charging station 30, the environment (temperature, etc.) of power storage device B is stable compared with when vehicle 10 is running, and the charging conditions (charging rate, etc.) Since it can be set arbitrarily, in the first embodiment, the data of power storage device B is collected during charging when the state of power storage device B is stable, and the deterioration of power storage device B is evaluated based on the collected data.

As described above, in the first embodiment, the deterioration evaluation device 32 evaluates the deterioration of the power storage device B using the data collected when the power storage device B is charged from the charging station 30, so it is possible to evaluate the deterioration of the power storage device B using data collected under stable conditions. Deterioration of power storage device B. Therefore, according to Embodiment 1, it is possible to reliably evaluate the deterioration of power storage device B mounted on vehicle 10 . Furthermore, the deterioration of power storage device B can be accurately evaluated.

In addition, in the first embodiment, the degradation of power storage device B is evaluated at the charging station 30 , so the evaluation data of various types of vehicles that can be connected can be comprehensively managed at the charging station 30 . In addition, an increase in cost on the vehicle side can also be suppressed.

[Modification 1 of Embodiment 1]

In Embodiment 1, the charging efficiency is used as the degradation data capable of evaluating the degradation state of the power storage device B, but other data may be used instead of the charging efficiency. For example, a secondary battery generally has a temperature rise when it becomes fully charged, and the temperature rise when fully charged becomes larger as deterioration progresses. Therefore, it is possible to collect the temperature Tb when power storage device B becomes fully charged, and use the collected temperature Tb to evaluate the deterioration state of power storage device B.

8 is a diagram showing degradation evaluation displayed on a display unit according to Modification 1 of Embodiment 1. FIG. Referring to FIG. 8 , the vertical axis represents the temperature Tb when the electric device B is fully charged, and the horizontal axis represents time (the unit is day). The solid line represents the current transition of the full charge temperature Tb, and the dotted line represents the predicted future full charge temperature Tb transition based on the previous full charge temperature Tb transition. In addition, time t0 corresponds to the present.

The first level LVL1 and the second level LVL2 correspond to the evaluation data acquired from the server 40, the first level LVL1 indicates the temperature at which the deterioration of the power storage device B has progressed to a considerable extent, and the second level LVL2 indicates the need for electric storage. The temperature of the overhaul of the device. Thereby, the user can recognize the deterioration state of power storage device B. As shown in FIG.

[Modification 2 of Embodiment 1]

When charging power storage device B from charging station 30 , a desired charging condition (charging rate) can be set, unlike when vehicle 10 is running. Here, the voltage Vb of the power storage device B rises as the power storage device B is charged, but when the deterioration of the power storage device B progresses, the resistance loss also increases due to an increase in the internal resistance, so the rate of increase in the voltage Vb decreases. . In addition, since the resistance loss is proportional to the square of the charging current, the decrease in the increase rate of the voltage Vb becomes more pronounced as the charging rate increases. Therefore, the deterioration state of power storage device B can be evaluated based on the rate of increase in voltage Vb when power storage device B is charged from charging station 30 .

FIG. 9 is a graph showing the charge rate of power storage device B according to Modification 2 of Embodiment 1. FIG. Referring to FIG. 9 , the vehicle 10 is typically charged at a charge rate of, for example, 1 Ah (1 amp per hour). When voltage Vb of power storage device B reaches Vb1, charging station 30 activates flag FLG. Then, the vehicle 10 raises the charging rate to a certain value (for example, 2Ah) higher than a predetermined value. Then, when the voltage Vb reaches Vb2 (>Vb1), the charging station 30 deactivates the flag FLG, and restores the charging rate to 1 Ah.

The charging station 30 counts the time during which the flag FLG is activated (the period during which the response signal ACK of the flag FLG is activated), that is, the time Δt required for the voltage Vb to rise from Vb1 to Vb2, and evaluates based on this required time Δt The state of deterioration of power storage device B.

10 is a diagram showing deterioration evaluation displayed on a display unit according to Modification 2 of Embodiment 1. FIG. Referring to FIG. 10 , the vertical axis represents the time Δt required for the voltage of power storage device B to rise from Vb1 to Vb2 , and the horizontal axis represents time (the unit is day). The solid line represents the transition of the required time Δt for charging in the past and this time, and the dotted line represents the transition of the future required time Δt predicted based on the transition of the previous required time Δt. In addition, time t0 corresponds to the present.

The first level LVL1 and the second level LVL2 correspond to the evaluation data acquired from the server 40. The first level LVL1 is a level indicating that the deterioration of the power storage device has progressed to a considerable extent, and the second level LVL2 is a level indicating that the power storage device is required. level of maintenance. Thereby, the user can recognize the deterioration state of the power storage device.

FIG. 11 is a flowchart illustrating a control structure of a degradation evaluation device according to Modification 2 of Embodiment 1. FIG. In addition, the processing of this flowchart is called from the main routine and executed at regular intervals or every time a predetermined condition is satisfied.

Referring to FIG. 11 , this flowchart includes steps S22 , S32 , S34 , S42 , and S44 in place of steps S20 , S30 , and S40 in the flowchart shown in FIG. 4 . That is, when it is determined in step S10 that power storage device B is being charged (YES in step S10), degradation evaluation device 32 determines whether voltage Vb of power storage device B is higher than Vb1 but lower than Vb2 (step S22) . When the degradation evaluation device 32 determines that the voltage Vb is equal to or less than Vb1 or equal to or greater than Vb2 (NO in step S22 ), the process proceeds to step S42 described later.

On the other hand, when it is determined in step S22 that voltage Vb is higher than Vb1 but lower than Vb2 (YES in step S22 ), degradation evaluation device 32 activates flag FLG output to vehicle 10 . Then, vehicle 10 increases the charging rate of power storage device B from charging station 30 to a certain value higher than a predetermined value (step S32). Then, the degradation evaluation device 32 counts the time for activating the flag FLG (that is, the time for increasing the charging rate) (step S34 ).

Next, the degradation evaluation device 32 determines whether or not the voltage Vb has become equal to or greater than Vb2 (step S42). When the degradation evaluation device 32 determines that the voltage Vb is lower than Vb2 (NO in step S42), the process proceeds to step S80. On the other hand, when it is determined in step S42 that the voltage Vb is equal to or greater than Vb2 (YES in step S42), the degradation evaluation device 32 restores the charging rate of the power storage device B from the charging station 30 to the normal charging rate. (step S44). Then, the degradation evaluation device 32 advances the process to step S50.

As described above, in Modification 2 of Embodiment 1, when charging power storage device B from charging station 30, a certain charging condition (charging rate) is set, and the performance of power storage device B is evaluated based on the data collected at this time. Deteriorated state. Therefore, according to Modification 2, the deterioration of power storage device B can be evaluated more accurately. In addition, since the charging rate is increased at the time of data collection, the deterioration state of power storage device B can be captured reliably.

[Modification 3 of Embodiment 1]

In order to evaluate the deterioration of power storage device B more accurately, it is preferable to prepare the charging conditions at the time of data collection, and to prepare the environment (temperature, etc.) at the time of data collection. Here, when charging from the charging station 30 , the vehicle 10 is stopped, and charging can also be performed in a garage, so it is assumed that the surrounding environment of the vehicle 10 is more stable than when the vehicle 10 is running. Therefore, in Modification 3 of Embodiment 1, data collection is performed when the charging environment is a predetermined condition, and the deterioration state of power storage device B is evaluated based on the collected data.

12 is a flowchart illustrating a control structure of a degradation evaluation device according to Modification 3 of Embodiment 1. FIG. In addition, the processing of this flowchart is called from the main routine and executed at regular intervals or every time a predetermined condition is satisfied.

Referring to FIG. 12 , this flowchart includes step S24 instead of step S20 in the flowchart shown in FIG. 4 . That is, when it is determined in step S10 that power storage device B is being charged, degradation evaluation device 32 determines whether temperature Tb of power storage device B is higher than threshold Tth1 and lower than threshold Tth2 (< Tth1 ) (step S24 ).

When the deterioration evaluation device 32 determines that the temperature Tb is equal to or less than the threshold value Tth1 or equal to or greater than the threshold value Tth2 (NO in step S24 ), the process proceeds to step S40 . On the other hand, when it is determined in step S24 that the temperature Tb is higher than the threshold value Tth1 and lower than the threshold value Tth2 (YES in step S24), the deterioration evaluation device 32 advances the process to step S30, and the temperature Tb is transmitted from the vehicle 10 via the connection wire 20 to step S24. The voltage Vb, charging current Ib, and temperature Tb of the power storage device mounted on the vehicle 10 are acquired.

In addition, in the above, the data for evaluating the deterioration state of the power storage device B is collected when the temperature Tb of the power storage device B is within the predetermined range, but it may also be satisfied when the vehicle or its surrounding environment (for example, the air temperature around the vehicle) satisfies Collect data when conditions are specified.

As described above, in Modification 3 of Embodiment 1, data for evaluating the state of degradation of power storage device B is collected when the environment during charging is a predetermined condition. Therefore, according to Modification 3, the deterioration state of power storage device B can be more accurately evaluated.

[Modification 4 of Embodiment 1]

In the above, the evaluation result of the degradation state of power storage device B is displayed on charging station 30 , but in Modification 4 of Embodiment 1, the evaluation result is transmitted from charging station 30 to vehicle 10 and displayed on vehicle 10 .

13 is a functional block diagram of a degradation evaluation device according to Modification 4 of Embodiment 1. FIG. Referring to FIG. 13 , this degradation evaluation device 32A further includes a data transmission unit 60 in addition to the configuration of the degradation evaluation device 32 according to Embodiment 1 shown in FIG. 2 . The data transmission unit 60 acquires data displayed on the display unit 58 from the display unit 58 , and converts the acquired data according to a preset conversion map.

For example, data transmission unit 60 converts the charging efficiency data of power storage device B acquired from display unit 58 into the travelable time and travelable distance of vehicle 10 as shown in FIG. 14 using a prepared conversion map. Then, the data transmitting unit 60 transmits the data on the travelable time and the travelable distance of the vehicle 10 to the vehicle 10 , and the vehicle 10 displays the travelable time and the travelable distance to the user.

As described above, in Modification 4 of Embodiment 1, the evaluation result of the degradation state of power storage device B is transmitted from charging station 30 to vehicle 10 , and the evaluation result is displayed on vehicle 10 . Therefore, according to Modification 4, the user of vehicle 10 can be made to recognize the deterioration state of power storage device B more strongly.

[Embodiment 2]

In Embodiment 2, based on the result of the degradation evaluation displayed to the user, the user can select a charging mode when charging power storage device B from charging station 30 . Specifically, the user can select a rapid charging mode in which power storage device B is charged at the maximum charging rate, or a low charging rate charging mode in which power storage device B is charged at a low charging rate that can suppress the progress of deterioration of power storage device B. model.

FIG. 15 is a schematic configuration diagram of a vehicle 10A according to the second embodiment. Referring to FIG. 15 , vehicle 10A further includes charging mode selection unit 160 in addition to the configuration of vehicle 10 in Embodiment 1 shown in FIG. 5 . Charging mode selection unit 160 is an input device for a user to select a maximum charging mode or a low charging rate charging mode when charging power storage device B from charging station 30 .

In this way, vehicle ECU 140 sets current command IR to the maximum charging rate (for example, 2Ah) when charging mode selection unit 160 selects the maximum charging mode. In this way, power output device 110 charges power storage device B (not shown) from charging stand 30 (not shown) connected to connector 150 at the maximum charging rate.

On the other hand, vehicle ECU 140 sets current command IR to a low charging rate (for example, a charging rate lower than 1 Ah) when charging mode selection unit 160 selects the low charging rate charging mode. In this way, power output device 110 charges power storage device B from charging station 30 at the low charging rate.

As described above, according to Embodiment 2, since the charging mode can be selected by the user's judgment based on the evaluation result of the deterioration state of power storage device B, convenience is improved.

[Embodiment 3]

In Embodiment 1, its modified examples, and Embodiment 2, the degradation state of power storage device B is evaluated at charging station 30 , but in Embodiment 3, all evaluations are performed on the vehicle side.

FIG. 16 is a schematic configuration diagram of a vehicle according to Embodiment 3. FIG. Referring to FIG. 16 , vehicle 10B does not include modem 130 in the structure of vehicle 10 according to Embodiment 1 shown in FIG. 5 , and includes vehicle ECU 140A instead of vehicle ECU 140 .

When charging power storage device B in power output device 110 from charging station 30 connected to connector 150, vehicle ECU 140A collects voltage Vb, charging current Ib, and temperature Tb of power storage device B, and collects power lines ACL1, Voltage Vac between ACL2 and current Iac flowing in electric power lines ACL1 , ACL2 . Then, vehicle ECU 140A evaluates the deterioration state of power storage device B using the collected data, and displays the evaluation result to the user.

In addition, other functions of vehicle ECU 140A are the same as those of vehicle ECU 140 in Embodiment 1 shown in FIG. 5 . In addition, the other structures of the vehicle 10B are the same as those of the vehicle 10 .

FIG. 17 is a functional block diagram of vehicle ECU 140A shown in FIG. 16 . In addition, in this FIG. 17, only the functional part related to the deterioration evaluation of power storage device B is shown. Referring to FIG. 17 , vehicle ECU 140A includes charging control unit 172 , data collection unit 174 , degradation evaluation unit 176 , storage unit 178 , and display unit 180 .

Charging control unit 172 determines whether power storage device B is being charged from charging station 30 , and activates signal AC output to power output device 110 when charging is performed, and outputs current command IR to power output device 110 . Moreover, charging control unit 172 instructs data collection unit 174 to collect data when charging power storage device B from charging station 30 .

Data collection unit 174 collects various data from power output device 110 when receiving an instruction to collect data from charging control unit 172 . Specifically, data collection unit 174 collects voltage Vb, charging current Ib, and temperature Tb of power storage device B, and also collects voltage Vac and current Iac.

Deterioration evaluation unit 176 calculates degradation data capable of evaluating the degradation state of power storage device B by using the collected data when data collection by data collection unit 174 ends. Specifically, degradation evaluation unit 176 calculates the charging efficiency using the data collected by data collection unit 174 . Then, the degradation evaluation unit 176 outputs the degradation data to the storage unit 178 .

Storage unit 178 is composed of a nonvolatile memory, and stores the degradation data received from degradation evaluation unit 176 in association with the data collection date and time every time vehicle 10B is charged from charging station 30 . In addition, storage unit 178 stores evaluation data for evaluating the degradation state of power storage device B. As shown in FIG. In addition, the evaluation data may be stored in the storage unit 178 in advance, or may be acquired from an external server.

Display unit 180 reads the degradation data and evaluation data of power storage device B from storage unit 178 , and displays the read data to the user. In addition, display unit 180 also predicts the progress of future degradation based on the current and past degradation data during charging, and displays the prediction result.

As described above, according to this third embodiment, similarly to the first embodiment, it is possible to reliably evaluate the state of degradation of power storage device B mounted on vehicle 10B. In addition, the deterioration state of power storage device B can be accurately evaluated.

In addition, in Embodiment 3, since the deterioration state of power storage device B is evaluated on the vehicle side, no special device is required outside vehicle 10B. That is, it is not necessary to provide a degradation evaluation device at the charging station.

In addition, the above-mentioned third embodiment corresponds to the above-mentioned first embodiment, but the same functions as those of the first to fourth modifications of the first embodiment and the second embodiment can be realized on the vehicle side. That is, although description is omitted due to duplication of description, as Modification 1 of Embodiment 3, the temperature of power storage device B at full charge may be used instead of charging efficiency to evaluate the state of deterioration of power storage device B.

In addition, as Modification 2 of Embodiment 3, the charging rate may be raised to a constant value higher than a predetermined value during data collection, and the deterioration state of power storage device B may be evaluated based on the rate of increase in voltage Vb of power storage device B. . Furthermore, as Modification 3 of Embodiment 3, data collection may be performed when the charging environment is a predetermined condition, and the deterioration state of power storage device B may be evaluated based on the collected data. In addition, the charging mode selection unit described in Embodiment 2 may be provided so that the user can select the rapid charging mode or the low charging rate charging mode.

[Embodiment 4]

In Embodiment 4, when charging power storage device B from charging station 30, the user can select a normal charging mode in which charging is performed at a normal charging rate, and rapid charging in which charging is performed at a charging rate higher than the normal charging rate. model. Then, the transition of the deterioration state of power storage device B is displayed to the user according to the selected charging mode.

The overall configuration of the degradation evaluation system in Embodiment 4 is the same as that of the degradation evaluation system 100 shown in FIG. 1 .

FIG. 18 is a functional block diagram of a degradation evaluation device according to Embodiment 4. FIG. Referring to FIG. 18 , in the structure of the degradation evaluation device 32 according to the first embodiment shown in FIG. 54A.

Charging mode selection unit 62 is an input unit for the user to select a charging mode, set a charging mode, and instruct charging start when charging power storage device B from charging station 30 . That is, when charging power storage device B from charging station 30, the user can select a normal charging mode in which charging is performed at a normal charging rate, and a charging rate higher than the normal charging rate can be selected for the purpose of shortening the charging time. Rapid charging mode for charging. In addition, the user can set the charging rate (for example, the amount of charging current per unit time) when selecting the rapid charging mode. Furthermore, after the user connects the connector of the vehicle 10 to the charging station 30, he can instruct the start of charging.

Then, based on the selected charging mode and the set charging rate, charging mode selection unit 62 transmits to vehicle 10 a message indicating the charging rate when charging power storage device B from charging station 30 via connecting wire 20 (not shown). Signal R. Specifically, when the normal charging mode is selected, the charging mode selection unit 62 instructs the vehicle 10 to have a preset normal charging rate (for example, a predetermined value of 1 Ah or less). In addition, the charging mode selection unit 62 instructs the vehicle 10 on the charging rate set by the user when the rapid charging mode is selected. In addition, when the charging rate is not specifically set by the user, the charging mode selection unit 62 instructs the vehicle 10 to have a preset rapid charging rate (for example, the highest charging rate allowable by the power storage device B).

In addition, when the user instructs the start of charging, the charging mode selection unit 62 transmits a signal ST instructing execution of charging to the vehicle 10 via the connecting wire 20 . Furthermore, charging mode selection unit 62 outputs signal R to display control unit 64 and degradation evaluation unit 54A, and outputs signal MD indicating the selected charging mode to display control unit 64 .

The display control unit 64 controls the display content of the display unit 58 . Specifically, when displaying the transition of the deterioration state of power storage device B on display unit 58 , display control unit 64 reads data corresponding to vehicle 10 from storage unit 56 based on the identification code ID of vehicle 10 and displays it on the display unit 58 . display unit 58 . Then, when the signal MD indicates the normal charging mode, the display control unit 64 reads data from the storage unit 56 when the vehicle 10 was charged in the normal charging mode in the past, and predicts future charging in the normal charging mode based on the read data. Transition of the state of deterioration during charging. Then, the display control unit 64 displays the predicted transition of the degradation state on the display unit 58 together with the transition of the past degradation state read from the storage unit 56 .

In addition, when the signal MD indicates the rapid charging mode, the display control unit 64 reads data from the storage unit 56 for charging at the charging rate indicated by the signal R in the past, and based on the read data, predicts that the charging will be performed in the rapid charging mode. The transition of the deterioration state at the time of charging in the future. Then, the display control unit 64 displays the predicted transition of the degradation state together with the past transition of the degradation state on the display unit 58 .

Deterioration evaluation unit 54A calculates degradation data capable of evaluating the degradation state of power storage device B of vehicle 10 using the data acquired by data acquisition unit 52 . Then, degradation evaluation unit 54A outputs the calculated degradation data to storage unit 56 in association with the charging rate at that time indicated by signal R. In addition, other functions of the degradation evaluation unit 54A are the same as those of the degradation evaluation unit 54 shown in FIG. 2 .

Further, vehicle ECU 140 ( FIG. 5 ) of vehicle 10 having received signals R and ST generates current command IR based on signal R, and activates signal AC based on signal ST. As a result, power storage device B is charged from charging station 30 at the charging rate indicated by signal R. FIG.

FIG. 19 is a flowchart illustrating a control structure of the degradation evaluation device 32B according to the fourth embodiment. In addition, in this FIG. 19, the control structure of the part related to the display of a deterioration state among the control by deterioration evaluation apparatus 32B is shown. The control structure of the part related to data collection and deterioration evaluation is the same as the control structure shown by the flowchart shown in FIG. 4 . In addition, the processing of this flowchart is called from the main routine and executed at regular intervals or every time a predetermined condition is satisfied.

Referring to FIG. 19 , deterioration evaluation device 32B determines whether the user has selected the normal charging mode or the rapid charging mode (step S110 ). When it is determined that the normal charging mode is selected ("normal" in step S110), degradation evaluation device 32B displays on the display unit the transition of the degradation state during charging in the normal charging mode (step S120). Specifically, the degradation evaluation device 32B reads and displays data corresponding to the vehicle 10 from the storage unit, and predicts the transition of the degradation state when future charging is performed in the normal charging mode based on the past data.

On the other hand, when it is determined in step S110 that the rapid charging mode is selected ("quick" in step S110), deterioration evaluation device 32B reads the charging rate set by the user (step S130). In addition, when the charging rate is not set by the user, the deterioration evaluation device 32B sets a preset rapid charging rate. Then, degradation evaluation device 32B displays transition of the degradation state during charging in the rapid charging mode on the display unit (step S140 ). Specifically, the degradation evaluation device 32B reads and displays data corresponding to the vehicle 10 from the storage unit, and predicts the transition of the degradation state when future charging is performed in the rapid charging mode based on the past data.

When the deterioration state of power storage device B is displayed in step S120 or step S140, deterioration evaluation device 32B determines whether or not the start of charging is instructed by the user (step S150). When it is determined that charging start has been instructed (YES in step S150 ), degradation evaluation device 32B outputs a signal R indicating a charging rate and a signal ST indicating execution of charging to vehicle 10 (step S160 ). On the other hand, when it is determined in step S150 that the start of charging has not been instructed (NO in step S150), degradation evaluation device 32B advances the process to step S170 without executing step S160.

FIG. 20 is a diagram showing an example of a display state when charging is performed in the rapid charging mode. In addition, in this FIG. 20, the case where charging efficiency is displayed as the data which can evaluate the deterioration state of power storage device B is shown. Referring to FIG. 20 , the solid line k1 represents the change of charging efficiency so far, and the dotted line k2 represents the change of charging efficiency predicted in the future when charging is performed at the charging rate set by the user. In addition, as shown in the figure, a dotted line k3 indicating the transition of charging efficiency when charging at a charging rate lower than the charging rate set by the user and a dotted line k4 may be displayed in combination. Indicates the transition of charging efficiency when charging is performed at a charging rate higher than the set charging rate by a predetermined charging rate.

In addition, the display state when charging is performed in the normal charging mode is, for example, as shown in FIG. 3 .

In addition, although not particularly shown, the transition of the degradation state during charging in the normal charging mode and the transition of the degradation state during charging in the rapid charging mode may be displayed on the same screen. At this time, the line showing the transition of the charging efficiency when charging in the normal charging mode and the line showing the transition of the charging efficiency when charging in the rapid charging mode may be color-coded (coded). In addition, the first level LVL1 indicating that the deterioration state of the power storage device B has progressed to a considerable extent may be displayed in yellow, for example, and the second level LVL2 indicating a level at which maintenance of the power storage device B is required may be displayed in red, for example, so as to provide information to the user. The latter emphasizes the deterioration state of power storage device B.

FIG. 21 is a diagram showing an example of a display state during charging. Referring to FIG. 21 , area 66 shows the state of charge (SOC) of power storage device B, and changes in charging efficiency are displayed in conjunction with changes in SOC during charging displayed in area 66 . Time t0 represents the charging start time point, and time t1 represents the current time point. Time t2 represents the predicted charging end time point. A dotted line k11 shows the transition of the charging efficiency predicted at the start of charging, and a solid line k12 shows the transition of the actual charging efficiency from the time t0 to the current time t1.

In addition, when the difference between the actual charging efficiency represented by the solid line k12 and the predicted charging efficiency represented by the dotted line k11 exceeds a predetermined value, the solid line k12 is displayed in red or blinking to draw the user's attention.

In addition, above, the data displayed on the display unit 58 may be transmitted to the vehicle 10 via the connecting wire 20, and the transition of the deterioration state of the power storage device B may be displayed on the vehicle side. In addition, the data displayed on the display unit 58 may be output to the outside of the charging station 30 and displayed on a home computer or the like.

As described above, in Embodiment 4, the transition of the degradation state of power storage device B when charging in the normal charging mode and the transition of the degradation state when charging in the rapid charging mode are displayed on display unit 58 . Therefore, according to Embodiment 4, the user can determine the charging mode (and charging rate) when charging the power storage device from the charging station 30 in consideration of the deterioration state of the power storage device B.

[Embodiment 5]

In the fourth embodiment, the selection of the charging mode and the deterioration state of the power storage device B are displayed on the charging station 30 side, but in the fifth embodiment, all are implemented on the vehicle side.

FIG. 22 is a schematic configuration diagram of a vehicle 10C according to the fifth embodiment. Referring to FIG. 22 , vehicle 10C further includes charging mode selection unit 160A and display device 190 in addition to vehicle 10B in Embodiment 3 shown in FIG. 16 , and includes vehicle ECU 140B instead of vehicle ECU 140A.

Charging mode selection unit 160A has the same function as charging mode selection unit 160 shown in FIG. 18 . Then, charging mode selection unit 160A outputs signal MD indicating the selected charging rate and signal R indicating the charging rate to vehicle ECU 140B.

Display device 190 receives display data from vehicle ECU 140B, and displays the transition of the degradation state of power storage device B. Specifically, when the normal charging mode is selected, display device 190 displays the transition of the degradation state predicted when charging is performed in the normal charging mode, together with the past transition of the degradation state. In addition, when the rapid charging mode is selected, display device 190 displays the transition of the predicted degradation state when charging is performed in the rapid charging mode together with the past transition of the degradation state. In addition, the actual display state when each charging mode is selected is as shown in FIG. 3 (in the normal charging mode) and FIG. 20 (in the rapid charging mode).

FIG. 23 is a functional block diagram of vehicle ECU 140B shown in FIG. 22 . Referring to FIG. 23 , in the structure of vehicle ECU 140A according to Embodiment 3 shown in FIG. control unit 182 .

Charging control unit 172A sets current command IR output to power output device 110 to a preset normal charging rate when signal MD from charging mode selection unit 160A (not shown) indicates the normal charging mode. On the other hand, charging control unit 172A sets current command IR based on the charging rate indicated by signal R from charging mode selection unit 160A when signal MD indicates the rapid charging mode. In addition, other functions of charging control unit 172A are the same as charging control unit 172 of Embodiment 3 shown in FIG. 17 .

Deterioration evaluation unit 176A calculates degradation data capable of evaluating the degradation state of power storage device B using the collected data when data collection by data collection unit 174 ends. Then, degradation evaluation unit 176A outputs the calculated degradation data to storage unit 178 in association with the current charging rate indicated by signal R. In addition, other functions of the degradation evaluation unit 176A are the same as those of the degradation evaluation unit 176 shown in FIG. 17 .

The display control unit 182 has the same function as the display control unit 64 shown in FIG. 18 . Furthermore, display control unit 182 outputs data indicating transition of the degradation state of power storage device B to display device 190 .

In addition, above, the data displayed on display device 190 may be transmitted to charging station 30 via connecting wire 20, and the transition of the deterioration state of power storage device B may be displayed on the charging station side. In addition, the display data may be output from the charging station 30 to the outside and displayed on a computer or the like at home.

As described above, according to this fifth embodiment, the same effect as that of the fourth embodiment can be obtained. In addition, since the deterioration state of power storage device B is evaluated and displayed on the vehicle side, it is not necessary to install a special device outside the vehicle.

In addition, in Embodiments 4 and 5 described above, as in Modification 1 of Embodiment 1, instead of charging efficiency, the temperature of power storage device B at the time of full charge may be used to evaluate the state of deterioration of power storage device B, and This evaluation data is displayed on the display unit 58 or the display device 190 . In addition, similarly to Modification 3 of Embodiment 1, data collection may be performed when the environment during charging is a predetermined condition, and the deterioration state of power storage device B may be evaluated based on the collected data, and the evaluation data may be displayed on display unit 58 or on the display device 190.

In addition, in each of the above-mentioned embodiments, it is assumed that the power storage devices B of the vehicles 10, 10A to 10C are charged from the charging station 30, but it is also possible to reverse the power flow from the vehicles 10, 10A to 10C to the charging station 30 (reverse power flow), or supply electric power from vehicles 10 , 10A to 10C to electric loads connected to connector 150 . Also, when electric power is supplied from vehicles 10, 10A to 10C to charging station 30 or electric loads, the environment (temperature, etc.) of power storage device B is stable compared to when vehicles 10, 10A to 10C are running, as in charging. , and the power supply conditions from the power storage device B can also be set freely to some extent, so it is also possible to collect data on the power storage device B when power is supplied from the vehicles 10, 10A to 10C to the charging station 30 or the electric load. , and evaluate the deterioration of power storage device B based on the collected data.

In addition, referring to FIG. 7 again, the zero-phase equivalent circuit can be regarded as a single-phase PWM inverter (inverter) that generates a single-phase AC voltage at neutral points N1 and N2 using a DC voltage supplied from positive line PL2. Therefore, by changing the zero-voltage vector in each of inverters 320, 330 and switching control inverters 320, 330 to operate as respective phase arms of a single-phase PWM inverter, it is possible to transfer the voltage from positive line PL2 to The DC power is converted into AC power and output to power lines ACL1 and ACL2.

In addition, in each of the above-described embodiments, vehicles 10 , 10A to 10C include motor generators MG1 , MG2 , and during power supply and reception with charging station 30 , neutral points N1 , N2 of motor generators MG1 , MG2 Electric power is input and output, but a dedicated inverter for supplying and receiving electric power between power storage device B and connector 150 connected to charging station 30 may be separately provided.

In addition, in the above, the vehicles 10, 10A to 10C are described as hybrid vehicles equipped with an engine and a motor generator as a power source. It suffices to supply and receive electric power between electric loads.

In addition, in the above, the processing of the deterioration evaluation devices 32, 32A, 32B and the vehicle ECU 140, 140A, 140B is actually performed by the CPU (Central Processing Unit), and the CPU reads each step of the above-mentioned flowchart from the ROM (Read Only Memory). program, and executes the read program to perform processing according to the above-mentioned flowchart. Therefore, the ROM corresponds to a computer (CPU)-readable storage medium storing a program including each step of the above-described flowchart.

In addition, in the above, the degradation evaluation devices 32, 32A, 32B and the vehicle ECUs 140, 140A, 140B respectively correspond to the "deterioration evaluation device" in the present invention, and the motor generators MG1, MG2, the inverters 220, 230, and the step-up converter 210 forms the "power conversion device" in the present invention. In addition, power lines ACL1 and ACL2 and connector 150 form a "connection device" in the present invention, and MG-ECU 240 corresponds to a "control device" in the present invention.

Embodiments disclosed this time should be considered as illustrative and non-restrictive in every respect. The scope of the present invention is shown by the claims rather than the description of the above-mentioned embodiments, and the meanings equivalent to the claims and all modifications within the scope are included.

Claims (22)

1. the deterioration evaluation system of an electrical storage device, it is the deterioration evaluation system that carries the electrical storage device on vehicle, comprising:

Vehicle, it constitutes can supply with and receive electric power between the power supply of described electrical storage device and outside vehicle or electric loading; With

The deterioration evaluating apparatus, it uses the deterioration state of the described electrical storage device of data evaluation of supplying with and collecting during reception electric power between the power supply of described electrical storage device and described outside vehicle or electric loading.

2. deterioration evaluation system as claimed in claim 1, wherein: described deterioration evaluating apparatus uses the deterioration state of the described electrical storage device of collecting of data evaluation when the power supply from described outside vehicle carries out the charging of described electrical storage device.

3. deterioration evaluation system as claimed in claim 1, wherein:

Described vehicle comprises:

Power-converting device, it constitutes and can carry out power converter between the power supply of described electrical storage device and described outside vehicle or electric loading;

Coupling arrangement, it constitutes and described power-converting device can be electrically connected with the power supply or the electric loading of described outside vehicle; With

Control device, it controls described power-converting device,

Described control device is controlled described power-converting device with certain condition at least when collecting described data.

4. deterioration evaluation system as claimed in claim 3, wherein: described control device is controlled described power-converting device when collecting described data, makes that the electric power of supplying with and receiving between the power supply of described electrical storage device and described outside vehicle or electric loading is bigger than setting.

5. deterioration evaluation system as claimed in claim 1, wherein: the deterioration state of estimating described electrical storage device when the environment of described deterioration evaluating apparatus around described vehicle or its satisfies rated condition.

6. deterioration evaluation system as claimed in claim 1 wherein, also comprises:

The charge mode selection portion, its can select from the power supply of described outside vehicle carry out with the 1st charge rate described electrical storage device charging common charge mode and to carry out the charge mode rapidly of charging of described electrical storage device any one from the power supply of described outside vehicle than high the 2nd charge rate of described the 1st charge rate; With

Display part, it can show the deterioration state of the described electrical storage device when charging with described common charge mode and with the deterioration state of the described rapidly described electrical storage device when charge mode charges.

7. deterioration evaluation system as claimed in claim 6, wherein: when described display part carries out the charging of described electrical storage device at the power supply from described outside vehicle, the charged state that shows described electrical storage device, and show the passing of the deterioration state of described electrical storage device with the passing of described charged state with linking.

8. vehicle, this vehicle can and the power supply of outside vehicle or electric loading between supply with and receive electric power, comprising:

Electrical storage device;

Power-converting device, it constitutes and can carry out power converter between the power supply of described electrical storage device and described outside vehicle or electric loading;

Coupling arrangement, it constitutes and described power-converting device can be electrically connected with the power supply or the electric loading of described outside vehicle; With

The deterioration evaluating apparatus, it uses between the power supply of described electrical storage device and described outside vehicle or electric loading the deterioration state of the described electrical storage device of data evaluation of supplying with via described coupling arrangement and collecting during reception electric power.

9. vehicle as claimed in claim 8, wherein: described deterioration evaluating apparatus uses the deterioration state of the described electrical storage device of collecting of data evaluation when the power supply from described outside vehicle carries out the charging of described electrical storage device.

10. vehicle as claimed in claim 8, wherein:

The control device that also possesses the described power-converting device of control;

Described control device is controlled described power-converting device with certain condition at least when collecting described data.

11. vehicle as claimed in claim 10, wherein: described control device is controlled described power-converting device when collecting described data, makes that the electric power of supplying with and receiving between the power supply of described electrical storage device and described outside vehicle or electric loading is bigger than setting.

12. vehicle as claimed in claim 8, wherein: the deterioration state of estimating described electrical storage device when the environment of described deterioration evaluating apparatus around described vehicle or its satisfies rated condition.

13. vehicle as claimed in claim 8 wherein, also comprises:

The charge mode selection portion, its can select from the power supply of described outside vehicle carry out with the 1st charge rate described electrical storage device charging common charge mode and to carry out the charge mode rapidly of charging of described electrical storage device any one from the power supply of described outside vehicle than high the 2nd charge rate of described the 1st charge rate; With

Display device, it can show the deterioration state of the described electrical storage device when charging with described common charge mode and with the deterioration state of the described rapidly described electrical storage device when charge mode charges.

14. vehicle as claimed in claim 13, wherein: when described display device is carried out the charging of described electrical storage device at the power supply from described outside vehicle, the charged state that shows described electrical storage device, and show the passing of the deterioration state of described electrical storage device in linkage with the passing of described charged state.

15. the deterioration evaluation method of an electrical storage device, it is the deterioration evaluation method of carrying the electrical storage device on vehicle, wherein:

Described vehicle constitutes can supply with and receive electric power between the power supply of described electrical storage device and outside vehicle or electric loading;

Described deterioration evaluation method comprises:

Between the power supply of described electrical storage device and described outside vehicle or electric loading, supply with and when receiving electric power, collect the 1st step of the data of the deterioration state that is used to estimate described electrical storage device; With

Use the 2nd step of the deterioration state of the collected described electrical storage device of data evaluation.

16. deterioration evaluation method as claimed in claim 15, wherein: in described the 1st step, described data are collected when the power supply from described outside vehicle carries out the charging of described electrical storage device.

17. deterioration evaluation method as claimed in claim 15, wherein:

Described vehicle comprises:

Power-converting device, it constitutes and can carry out power converter between the power supply of described electrical storage device and described outside vehicle or electric loading; With

Coupling arrangement, it constitutes and described power-converting device can be electrically connected with the power supply or the electric loading of described outside vehicle;

Described deterioration evaluation method also comprises the 3rd step of controlling described power-converting device at least when collecting described data with certain condition.

18. deterioration evaluation method as claimed in claim 17, wherein: in described the 3rd step, described power-converting device is controlled when collecting described data, makes that the electric power of supplying with and receiving between the power supply of described electrical storage device and described outside vehicle or electric loading is bigger than setting.

19. deterioration evaluation method as claimed in claim 15, wherein:

Also possess and judge whether described vehicle or the environment around it satisfy the 4th step of rated condition;

Be judged to be described environment when satisfying described rated condition, in described the 2nd step, estimating the deterioration state of described electrical storage device.

20. deterioration evaluation method as claimed in claim 15 wherein, also possesses:

Selection from the power supply of described outside vehicle carry out with the 1st charge rate described electrical storage device charging common charge mode and to carry out any one the 5th step the charge mode rapidly of charging of described electrical storage device from the power supply of described outside vehicle than high the 2nd charge rate of described the 1st charge rate; With

The deterioration state of the described electrical storage device when demonstration is charged with described common charge mode and with the 6th at least a step in the deterioration state of the described rapidly described electrical storage device when charge mode charges.

21. deterioration evaluation method as claimed in claim 20, wherein: when the power supply from described outside vehicle carries out the charging of described electrical storage device, in described the 6th step, the charged state that shows described electrical storage device, and show the passing of the deterioration state of described electrical storage device with the passing of described charged state with linking.

22. the storage medium that computing machine can read wherein stores and is used for making the computing machine enforcement of rights to require the program of each described deterioration evaluation method of 15～21.

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