JP2016001970A - On-vehicle battery charging/discharging display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easily recognizable to suppress charging and discharging of an on-vehicle battery.SOLUTION: A charging/discharging display device 1 for a battery 30 mounted in a vehicle, includes: a motor-generator 31 driven by electric power output from a battery 30 for running and driving the vehicle; a motor control unit 32 for driving the motor-generator 31 in response to vehicle running to generate electric power, and inputting the electric power generated by the motor-generator 31 to the battery 30 to charge the battery 30 while braking the vehicle; and a suppression gain computing unit 22 and an output indication torque computing unit 23 of a control unit 20 suppressing charging and discharging of the battery 30. The device 1 displays an input/output electric power status of the battery 30 by moving an indicator, displays a charging/discharging suppression state of the battery 30 by turning on a lamp 10 provided on a tip end of the indicator, and turns on the lamp 10 on the basis of a suppression rate (suppression gain G) of charging/discharging of the battery 30 when the charging/discharging is suppressed.

Description

  The present invention relates to a display device that displays an input / output power status of an in-vehicle battery.

In regenerative braking devices that are used in recent years, electric vehicles and plug-in hybrid vehicles, etc. use an electric motor for driving as a generator during deceleration to reduce the power consumption of the on-board battery. Is provided.
Furthermore, some vehicles equipped with the above-described regenerative braking device include a display device that displays the input / output power status of the on-vehicle battery.

  For example, Patent Document 1 discloses a display device that displays the input / output power status of an in-vehicle battery as a display device that displays the input / output power status of the in-vehicle battery. In the display device of Patent Document 1, when the input / output power to the in-vehicle battery is 0, the pointer is positioned at the middle position of the swing range, and the pointer swings to the right as the output power increases. As the input power increases, the pointer swings leftward. Thereby, it becomes a standard for the driver | operator who performs the driving | operation which suppresses power consumption, and the driving | operation which accelerates | stimulates charge.

JP 2013-201840 A

  However, when charging with the regenerative braking device as described above, if the on-board battery is nearly fully charged, there is no destination for the generated power, so control is performed to suppress the generated power in the regenerative braking device. Yes. Therefore, when the on-vehicle battery is fully charged, the regenerative braking force by the regenerative braking device is reduced, and there is a possibility that the deceleration of the vehicle is delayed or a sense of incongruity than the degree intended by the driver.

In addition, the driver may drive to recharge the vehicle battery so that more regenerative braking is performed, but if the vehicle battery is charged, the regenerative braking force is reduced to reduce the running speed. Sometimes you want to secure.
The present invention has been made to solve the above-described problems, and its object is to
It is an object of the present invention to provide a charge / discharge display device for an in-vehicle battery that can easily recognize that the input / output power to the in-vehicle battery is suppressed and can perform an appropriate vehicle running operation.

  In order to achieve the above object, a charge / discharge display device for an in-vehicle battery according to claim 1 includes an electric motor for driving a vehicle driven by electric power output from the in-vehicle battery, and driving the electric motor by driving the vehicle. A regenerative braking control unit configured to input and charge the electric power generated by the motor while generating power and braking the vehicle; and a charging / discharging suppressing unit configured to suppress charging / discharging of the on-vehicle battery. A charge / discharge display device for an in-vehicle battery mounted on a vehicle, which displays the input / output power status of the in-vehicle battery and displays the charge / discharge suppression status in a manner different from the display mode of the input / output power status. When the charge / discharge to the in-vehicle battery is suppressed by the input / output power indicator provided with the suppression indicator and the charge / discharge suppression unit, based on the suppression rate of the charge / discharge, the suppression indicator Charge / discharge A display control unit to execute the display of the control status, characterized by comprising a.

According to a second aspect of the present invention, there is provided the on-vehicle battery charge / discharge display device according to the first aspect, wherein the input / output power indicator displays the input / output power status of the on-vehicle battery by moving a pointer, and the suppression indicator is The lamp is provided on the pointer, and the charge / discharge suppression status is displayed by turning on the lamp.
According to a third aspect of the present invention, there is provided the in-vehicle battery charge / discharge display device according to the second aspect, wherein the suppression indicator is a plurality of lamps provided on the pointer, and the display control unit is configured to charge the in-vehicle battery. The number of lighting or lighting positions of the plurality of lamps is changed according to a discharge suppression rate.

  According to a fourth aspect of the present invention, there is provided the on-vehicle battery charge / discharge display device according to any one of the first to third aspects, wherein the charge / discharge suppression unit suppresses torque of the electric motor and the regenerative braking control unit performs the on-vehicle battery control. Charging the battery is suppressed, and the display control unit displays the charge / discharge suppression status by the suppression indicator based on a torque suppression rate of the electric motor in the charge / discharge suppression unit.

The charge / discharge display device for an in-vehicle battery according to claim 5 is characterized in that, in claim 4, the torque suppression rate of the electric motor in the charge / discharge suppression unit is calculated based on at least the charge capacity of the in-vehicle battery. And
Moreover, the charging / discharging display apparatus of the vehicle-mounted battery of Claim 6 WHEREIN: The said charging / discharging suppression part suppresses the maximum output from the said vehicle-mounted battery in any one of Claims 1-3, The said display control part is The charge / discharge suppression status is displayed by the suppression indicator based on the maximum output suppression rate from the in-vehicle battery in the charge / discharge suppression unit.

  According to a seventh aspect of the present invention, there is provided the on-vehicle battery charge / discharge display device according to the sixth aspect, wherein the maximum output suppression rate from the on-vehicle battery in the charge / discharge suppression unit is calculated based on at least the temperature of the on-vehicle battery. It is characterized by.

  According to the invention of claim 1, when charging / discharging to the in-vehicle battery is suppressed by the charging / discharging suppression unit, the suppression indicator provided in the input / output power indicator is based on the charging / discharging suppression rate. Since the charge / discharge suppression status is displayed, the input / output power status of the in-vehicle battery can be confirmed and the suppression status of the input / output power to the in-vehicle battery can be recognized simultaneously and easily. Therefore, input / output of electric power of the in-vehicle battery is suppressed, and for example, even if vehicle traveling is suppressed, an appropriate vehicle traveling operation can be performed without feeling uncomfortable.

  According to the invention of claim 2, the input / output power status of the in-vehicle battery can be recognized by the movement of the pointer by the input / output power indicator, and the charge / discharge suppression status to the in-vehicle battery is displayed by the lamp provided on the pointer. Therefore, the input / output power status of the in-vehicle battery and the charging / discharging suppression status can be recognized without moving the line of sight, and the charging / discharging suppression status can be intuitively recognized, and the visibility can be greatly improved.

According to the invention of claim 3, it becomes possible to recognize the charging / discharging suppression status of the in-vehicle battery in a step-by-step manner based on the number of lighting or the lighting position of the plurality of lamps provided on the pointer, and more appropriate vehicle driving operation can be performed. Can be possible.
According to the invention of claim 4, since the charge / discharge suppression status is displayed by the suppression indicator provided in the input / output power indicator based on the torque suppression rate of the motor in the charge / discharge suppression unit, It is possible to display the charging / discharging suppression status with easy control using the torque suppression rate in suppression, and easily recognize that the input power to the in-vehicle battery is suppressed along with checking the input / output power status to the in-vehicle battery can do. Therefore, even if further regenerative braking is not possible, it is possible to perform an appropriate vehicle traveling operation such as suppressing unnecessary use of regenerative braking and maintaining the traveling speed without feeling uncomfortable.

According to the invention of claim 5, since the torque suppression rate of the motor in the charge / discharge suppression unit is calculated based on at least the charge capacity of the in-vehicle battery, the input power to the in-vehicle battery is appropriately suppressed. The suppression status of the input power can be easily recognized by displaying the charging / discharging suppression status on the suppression indicator.
According to the invention of claim 6, since the charge / discharge suppression status is displayed by the suppression indicator provided in the input / output power indicator based on the maximum output suppression rate in the charge / discharge suppression unit, It is possible to display the charge / discharge suppression status with easy control using the maximum output suppression rate when suppressing the maximum output of the battery, and confirming the input / output power status to the in-vehicle battery and suppressing the output power from the in-vehicle battery Can be easily recognized. Therefore, even if further acceleration is impossible, it is possible to perform an appropriate vehicle traveling operation such as suppressing a useless acceleration operation without feeling uncomfortable.

  According to the invention of claim 7, since the maximum output suppression rate from the in-vehicle battery in the charge / discharge suppression unit is calculated based on at least the temperature of the in-vehicle battery, the suppression of the output power from the in-vehicle battery is appropriately performed. This is done, and the suppression status of the output power can be easily recognized by displaying the charging / discharging suppression status on the suppression indicator.

It is an external view of the charging / discharging display apparatus which concerns on one Embodiment of this invention. It is an external view of the charge / discharge display apparatus which concerns on other embodiment. It is a block diagram of the control unit which performs motor torque control. It is an example of the calculation map of the suppression gain based on the highest cell voltage in the suppression gain calculating part. It is an example of the calculation map of the suppression gain based on the highest cell temperature in the suppression gain calculating part. It is an example of the calculation map of the suppression gain based on the minimum cell temperature in the suppression gain calculating part. It is an example of the calculation map of the suppression gain based on the motor temperature in the suppression gain calculating part. It is a flowchart which shows the control point which determines the lighting display of a pointer lamp in a control unit, and non-display.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a charge / discharge display device according to an embodiment of the present invention. FIG. 2 is an external view of a charge / discharge display device according to another embodiment. FIG. 3 is a block diagram of a control unit that executes motor torque control.
The charge / discharge display device according to the present embodiment drives driving wheels by a motor generator 31 (electric motor) supplied with power from an in-vehicle battery 30 (in-vehicle battery) like an electric vehicle or a plug-in hybrid vehicle. It is mounted on a vehicle that can travel.

  The motor control unit 32 (regenerative braking control unit) that controls the operation of the motor generator 31 enables regenerative braking control. In the regenerative braking control, the motor generator 31 is used as a generator, the rotation of the drive wheels is converted into electric power during deceleration or downhill, etc., and the battery 30 is charged. Is done.

The battery 30 is configured by collecting a plurality of cells, has a sensor for detecting the temperature for each cell, and can detect the voltage of each cell. The motor generator 31 is provided with a sensor that detects the temperature of the motor generator 31.
As shown in FIG. 1, the charge / discharge display device 1 (input / output power indicator) of the present embodiment is a semicircular meter having a pointer 2 that can be swung in a range of approximately 180 degrees. The output power from the battery 30 and the input power to the battery 30 can be displayed with a movement angle of 2.

Near the position where the needle 2 is swung approximately 40 degrees from the upper side to the left side is the zero position 3 where the input / output power to the battery 30 is zero, and when there is output power from the battery 30, the zero position 3 starts. It swings to the right and swings from the zero position 3 to the left when there is input power to the battery 30.
The pointer 2 swings to the right as the output power from the battery 30 increases, and the pointer 2 swings to the left as the input power to the battery 30 increases.

In the swing range of the pointer 2 on the right side from the zero position 3, the output power from the battery 30 is small near the zero position 3, so-called Eco mode, and the output power from the battery 30 is large near the position swung to the right side. This is a so-called Power mode.
Further, in the swing mode of the left hand pointer 2 from the zero position 3, that is, when there is input power to the battery 30, it is a so-called Charge mode in which the battery 30 is charged.

Furthermore, in the present embodiment, a lamp 10 (suppression indicator) is provided at the tip of the pointer 2. The lamp 10 is a lamp that displays motor torque suppression in regenerative braking control.
As shown in FIG. 2, a plurality of lamps (10a to 10e) for indicating motor torque suppression may be arranged side by side from the vicinity of the base of the pointer 2 toward the tip.
A control unit 20 that executes motor torque control is mounted on a vehicle and performs suppression control of motor output torque at the time of regenerative braking control or during power running by supplying power from the battery 30 to the motor generator 31. The control unit 20 includes an input / output device, a storage device (ROM, RAM, nonvolatile RAM, etc.), a central processing unit (CPU), and the like.

As shown in FIG. 3, the control unit 20 includes a required torque calculation unit 21, a suppression gain calculation unit 22, an output instruction torque calculation unit 23, and a suppression display control unit 24 (display control unit).
The required torque calculation unit 21 calculates the required output torque of the motor generator 31 based on the accelerator operation amount, the rotation speed of the motor generator 31, and the like.

The suppression gain calculation unit 22 receives the voltage and temperature of each cell of the battery 30 and the temperature of the motor generator 31, and determines the suppression gain G from the maximum cell voltage Vmax, the maximum cell temperature Tmax, the minimum cell temperature Tmin, and the motor temperature Tm. (Torque suppression rate, suppression rate) is calculated.
The output instruction torque calculation unit 23 calculates the output instruction torque (regenerative braking torque) by adding the suppression gain G calculated by the suppression gain calculation unit 22 to the request output torque calculated by the request torque calculation unit 21. .

The output instruction torque calculator 23 outputs the calculated output instruction torque to the motor control unit 32, and the output control of the motor generator 31 (regenerative braking force control) is performed.
The suppression display control unit 24 controls the operation of the lamp 10 provided on the pointer 2 of the charge / discharge display device 1 based on the suppression gain G calculated by the suppression gain calculation unit 22.
The suppression gain calculation unit 22 and the output instruction torque calculation unit 23 correspond to the charge / discharge suppression unit of the present invention.

  4 to 7 are examples of maps for calculating the suppression gain G in the suppression gain calculation unit 22. FIG. 4 is a map for calculating the suppression gain G based on the maximum cell voltage Vmax, FIG. 5 is a map for calculating the suppression gain G based on the maximum cell temperature Tmax, and FIG. 6 is an suppression gain based on the minimum cell temperature Tmin. FIG. 7 is a map for calculating the suppression gain G based on the motor temperature Tm.

As shown in FIG. 4, when the maximum cell voltage Vmax is less than or equal to a predetermined value V1, the suppression gain G is set to 1, and the suppression gain G is decreased as the value becomes higher than the predetermined value V1, thereby increasing the maximum cell voltage Vmax. The suppression gain G is set to 0 near the upper limit value. The predetermined value V1 is a value corresponding to the vicinity of full charge.
Further, as shown in FIG. 5, when the maximum cell temperature Tmax is equal to or lower than a predetermined value T1, the suppression gain G is set to 1, and the suppression gain G is decreased as the value becomes higher than the predetermined value T1. Set to 0 near the upper limit of the operating temperature range. The predetermined value T1 is a value lower than the upper limit value of the operating temperature range of the battery 30 and in the vicinity thereof.

Further, as shown in FIG. 6, when the minimum cell temperature Tmin is equal to or higher than a predetermined value T2, the suppression gain G is set to 1, and the suppression gain G is decreased as the minimum cell temperature Tmin becomes lower than the predetermined value T2. Set to 0 near the lower limit of the operating temperature range. The predetermined value T2 is higher than the lower limit value of the operating temperature range of the battery 30 and a value in the vicinity thereof.
Further, as shown in FIG. 7, when the motor temperature Tm is equal to or lower than the predetermined value T3, the suppression gain G is set to 1, and the suppression gain G is decreased as the motor temperature Tm becomes higher than the predetermined value T3. Set to 0 near the upper limit of the operating temperature range. The predetermined value T3 is lower than the upper limit value of the operating temperature range of the motor generator 31 and is a nearby value.

The suppression gain calculation unit 22 selects the lowest value among the suppression gains G obtained using FIGS. 4 to 7 and uses it for calculation and display of the output instruction torque. Note that the suppression gain calculation unit 22 may select a value obtained by integrating the plurality of suppression gains G.
FIG. 8 is a flowchart showing a control procedure for determining whether to turn on or off the lamp 10 of the pointer 2 in the control unit 20 during regenerative braking control. This flowchart shows a control procedure when there is one lamp 10 on the pointer 2 as shown in FIG.

This control is executed during regenerative braking control.
First, in step S10, the voltage of each cell of the battery 30 is input to determine whether or not the battery is fully charged. If the battery is fully charged, the process proceeds to step S20. If it is not fully charged, the process proceeds to step S50. The fully charged state here may be set as appropriate within a range where the charging capacity of the battery 30 is close to 100%.

In step S <b> 20, electric power is generated in the motor generator 31 by regenerative braking control, and the battery 30 is charged with the electric power. Then, the process proceeds to step S30.
In step S30, it is determined whether or not there is input suppression. Whether or not there is input suppression is determined to be input suppression when the suppression gain G is calculated to be less than the predetermined value G1 by the suppression gain calculation unit 22, and the process proceeds to step S40. When the suppression gain G is calculated to be equal to or greater than the predetermined value G1, it is determined that there is no input suppression, and the process proceeds to step S50. The predetermined value G1 may be set to a value greater than 0 and close to 0.

In step S40, the indicator 10 lamp 10 is turned on. Then, this routine ends.
In step S50, the normal mode, that is, the lamp 10 of the pointer 2 is turned off. Then, this routine ends.
As described above, in the present embodiment, when the lamp 10 is provided at the tip of the pointer 2 of the charge / discharge display device 1 and the input of power to the battery 30 is suppressed during regenerative braking control, the input suppression is described in detail. The lamp 10 is turned on when torque suppression is performed so that the suppression gain G related to the suppression rate is less than the predetermined value G1. Therefore, the driver can easily and reliably recognize that the input suppression is performed. As a result, the driver can perform appropriate vehicle driving operations such as maintaining the vehicle traveling speed by suppressing unnecessary regenerative braking control without feeling uncomfortable even if further regenerative braking control is impossible. It can be.

  In the present embodiment, since the lamp 10 provided at the tip of the pointer 2 of the charge / discharge display device 1 is turned on when there is input suppression, the driver can intuitively understand that there is input suppression at the present time only by lighting the lamp 10. Therefore, the input / output power status to the battery 30 and the charge / discharge suppression status can be recognized without moving the line of sight. Therefore, the visibility in the charge / discharge display device 1 can be greatly improved, and the safety during traveling can be improved.

Further, since the lighting of the lamp 10 is determined using the suppression gain G that is the torque suppression rate during the regenerative braking control, the torque suppression during the regenerative braking control, that is, the input of power to the battery 30 is suppressed. This can be achieved with easy control.
In this embodiment, the suppression gain G is calculated based on the maximum cell voltage Vmax, the maximum cell temperature Tmax, the minimum cell temperature Tmin, and the motor temperature Tm, and in particular, the maximum cell correlated with the charge capacity of the battery 30. Since the suppression gain G is calculated based on the voltage Vmax, the input to the battery 30 is appropriately suppressed. Since the suppression gain G decreases and the lamp 10 is turned on as the maximum cell voltage Vmax becomes higher than the predetermined value V1, it is easy for the battery 30 to be nearly fully charged and the input is suppressed. And can be recognized accurately.

  In the above embodiment, the lamp 10 is lit when the input is suppressed to suppress the input power to the battery 30 during regenerative braking control. However, the power running is performed by supplying power from the battery 30 to the motor generator 31. Even at times, the lamp 10 may be lit when the output is suppressed to suppress the maximum output from the battery 30. In such output suppression, control may be performed so that the lamp 10 is turned on when the maximum output suppression rate from the battery 30 is less than the predetermined value G2 set as appropriate, similar to the predetermined value G1 described above. This maximum output suppression rate may be calculated in the same manner as the suppression gain G calculated in the above embodiment.

Thereby, when the maximum output from the battery 30 is suppressed, the suppression of the output power can be easily recognized by the lighting of the indicator lamp 10, without feeling uncomfortable even if further acceleration is impossible, An appropriate vehicle travel operation can be made possible, such as suppressing useless acceleration operations.
In such output suppression, in particular, by calculating the suppression gain G (maximum output suppression rate) based on the maximum cell temperature Tmax and the minimum cell temperature Tmin of the battery 30, the output suppression is performed based on the temperature of these batteries 30. Thus, the suppression of output can be easily and accurately recognized by the lighting of the lamp 10.

  Further, in the above embodiment, one lamp 10 is provided at the tip of the pointer 2 of the charge / discharge display device 1, and the lamp is turned on when the suppression gain G is less than the predetermined value G1, but as shown in FIG. When a plurality of lamps 10 are provided at the tip of 2, all the lamps 10 a to 10 e may be turned on when the suppression gain G is less than the predetermined value G 1, or a plurality of lamps 10 a are selected according to the suppression gain G. 10e may be changed, or the number of lighting may be changed according to the suppression gain G.

When the lamp to be lit (the position of the lit lamp) is changed among the plurality of lamps 10a to 10e according to the suppression gain G, for example, as the suppression gain G decreases from 1, that is, the suppression rate increases. Accordingly, the lamp to be lit may be changed from the lamp 10a on the proximal end side of the pointer 2 to the lamp 10e on the distal end side.
When changing the number of lighting of the lamps 10a to 10e according to the suppression gain G, for example, the number of lighting is increased as the suppression gain G decreases from 1, that is, as the suppression rate increases. That's fine. Further, when the number of lamps 10a to 10e to be lit is increased, the lamps 10a to 10e may be lit so as to be lit from the lamp 10a at the base end and increase toward the lamp 10e at the tip.

In this way, by changing the number of lighting and the lighting position of the lamps 10a to 10e, it becomes possible to recognize the reduction of the suppression gain G, that is, the charging / discharging suppression rate to the battery 30 step by step and intuitively, Corresponding to the number of lighting and the lighting position of each of the lamps 10a to 10e, the vehicle traveling operation such as the accelerator operation can be performed more appropriately.
The suppression gain G can be calculated from at least one of the maximum cell voltage Vmax, the maximum cell temperature Tmax, the minimum cell temperature Tmin, and the motor temperature Tm, or calculated from other vehicle data. May be.

  The present invention is not limited to the above embodiment, and can be widely applied to the charge / discharge display device of the battery 30.

1 Charging / Discharging Display 2 Pointer 10 Lamp (Suppression Indicator)
20 control unit 22 suppression gain calculation unit (charge / discharge suppression unit)
23 Output instruction torque calculation part (charge / discharge suppression part)
24 Suppression display control unit (display control unit)
30 battery (on-vehicle battery)
31 Motor generator (electric motor)
32 Motor control unit (regenerative braking control unit)

Claims (7)

An electric motor for driving the vehicle driven by the electric power output from the in-vehicle battery, and the electric power generated by driving the electric motor by driving the vehicle, and the electric power generated by the electric motor while braking the vehicle is input to the in-vehicle battery A regenerative braking control unit for charging and a charging / discharging suppressing unit for suppressing charging / discharging to the in-vehicle battery, and a charging / discharging display device for an in-vehicle battery mounted on a vehicle,
An input / output power indicator provided with a suppression indicator that displays the input / output power status of the in-vehicle battery and displays the charge / discharge suppression status in a mode different from the display mode of the input / output power status;
When charging / discharging to the in-vehicle battery is suppressed by the charge / discharge suppression unit, based on the suppression rate of the charge / discharge, a display control unit for executing display of the charge / discharge suppression status by the suppression indicator;
An in-vehicle battery charge / discharge display device comprising: The input / output power indicator displays the input / output power status of the in-vehicle battery by moving a pointer,
The charging / discharging display device for an in-vehicle battery according to claim 1, wherein the suppression indicator is a lamp provided on the pointer, and displays the charging / discharging suppression status by lighting the lamp. The suppression indicator is a plurality of lamps provided on the pointer,
The charge / discharge display of the on-vehicle battery according to claim 2, wherein the display control unit changes a lighting number or a lighting position of the plurality of lamps according to a charge / discharge suppression rate to the on-vehicle battery. apparatus. The charge / discharge suppression unit suppresses charging of the in-vehicle battery by the regenerative braking control unit by suppressing torque of the electric motor,
The said display control part performs the display of the said charging / discharging suppression condition by the said suppression indicator based on the torque suppression rate of the said motor in the said charging / discharging suppression part, The any one of Claim 1 to 3 characterized by the above-mentioned. The charging / discharging display apparatus of the vehicle-mounted battery as described in a term.   5. The on-vehicle battery charge / discharge display device according to claim 4, wherein a torque suppression rate of the electric motor in the charge / discharge suppression unit is calculated based on at least a charge capacity of the on-vehicle battery. The charge / discharge suppression unit suppresses the maximum output from the in-vehicle battery,
The said display control part displays the said charging / discharging suppression condition by the said suppression indicator based on the maximum output suppression rate from the said vehicle-mounted battery in the said charging / discharging suppression part. The on-vehicle battery charge / discharge display device according to any one of the preceding claims.   The charge / discharge display device for an in-vehicle battery according to claim 6, wherein the maximum output suppression rate from the in-vehicle battery in the charge / discharge suppression unit is calculated based on at least a temperature of the in-vehicle battery.

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