JP6432415B2 - Battery remaining capacity display device - Google Patents

Description

  The present invention relates to a battery remaining capacity display device, for example, a battery remaining capacity display device for a battery that supplies power to a motor.

  Vehicles equipped with a motor that is driven using electric power stored in a battery are known, and some have a remaining battery capacity display device that displays the remaining battery capacity.

  For example, in Patent Document 1, in a battery remaining capacity display device that changes a display state according to a threshold value based on a SOC (State Of Charge) of the battery, the battery remaining capacity display device is based on a charging operation characteristic of a driver's battery. It has been proposed to change the threshold value for changing the display state.

  In the battery remaining capacity display device described in Patent Document 1, since the operating state of an electrical load such as a headlight or a blower fan connected to the battery is not considered, the remaining battery capacity is displayed depending on the operating state of the electrical load. The display state of the device may change rapidly, and the driver may be confused.

  In order to solve such a problem, there is a battery remaining capacity display device that changes a threshold value for changing a display state according to an operating state of an electric load.

JP 2013-069227 A

  In a vehicle in which engine restart or drive assist is performed by a motor, a threshold value is set for the SOC of the battery, and travel control such as prohibition of idle stop and prohibition of assist travel by the motor is executed based on the set threshold value. Is done.

  In this travel control, the threshold value for determining whether to stop idling or to prohibit assist travel by the motor is changed according to the operating state of an electric load such as a headlight or a blower fan.

  Therefore, in the battery remaining capacity display device described in Patent Document 1, even if the display state of the battery remaining capacity display device is the same, idle stop or assist running is not performed or performed depending on the operating state of the electric load. Sometimes.

  Further, in the battery remaining capacity display device that changes the threshold value for changing the display state according to the operating state of the electric load, the threshold value for changing the display state is changed when the operating state of the electric load is changed. In some cases, it is displayed that the remaining battery capacity has increased or displayed as if the remaining battery capacity has decreased even though the battery is not discharged.

  In this way, the display state of the remaining battery capacity display device does not match the execution timing of idle stop or assist travel, the display state of the remaining battery capacity display device does not match the battery state, and the driver Sometimes made me feel uncomfortable.

  Therefore, an object of the present invention is to provide a remaining battery capacity display device that can improve usability without making the driver feel uncomfortable.

One aspect of the invention of a battery remaining capacity display device that solves the above problem is a battery remaining capacity display device for a vehicle that includes an engine, a battery, and a motor that is driven by electric power supplied from the battery. A display unit that displays the remaining capacity state, idle stop control that restarts the engine by the driving force of the motor, assist traveling control that assists the engine driving by driving the motor, and travels the vehicle, driving only the motor A determination unit that performs execution permission determination to determine whether or not to permit execution of any one or more of motor driving control for driving the vehicle as a source, and a display unit based on the determination result determined by the determination unit determining a display state setting unit for setting a state of the remaining capacity of the battery to be displayed, whether the battery is being discharged or being charged Comprising a discharge state judging unit, the display state setting unit is an shall set the state of the remaining capacity of the battery to be displayed on the display unit based on information determined by the charge and discharge state determining unit.

  As described above, according to one embodiment of the present invention, the driver can be prevented from feeling uncomfortable, and usability can be improved.

FIG. 1 is a conceptual block diagram showing a remaining battery capacity display device according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating the remaining battery capacity display device according to the first embodiment of the present invention, and is a diagram illustrating a display example of the display unit. FIG. 3 is a diagram illustrating the remaining battery capacity display device according to the first embodiment of the present invention, and is a diagram illustrating a threshold map for determining the execution permission. FIG. 4 is a diagram showing the remaining battery capacity display device according to the first embodiment of the present invention, and is a flowchart for explaining the remaining battery capacity display processing procedure. FIG. 5 is a diagram showing the remaining battery capacity display device according to the first embodiment of the present invention, and is a flowchart for explaining the one-segment display flag establishment determination processing procedure. FIG. 6 is a diagram showing the remaining battery capacity display device according to the first embodiment of the present invention, and is a flowchart for explaining the 2-segment display flag establishment determination processing procedure. FIG. 7 is a diagram showing the remaining battery capacity display device according to the first embodiment of the present invention, and is a flowchart for explaining the processing procedure for determining whether the three-segment display flag is established. FIG. 8 is a diagram showing the remaining battery capacity display device according to the first embodiment of the present invention, and is a flowchart for explaining the 4-segment display flag establishment determination processing procedure. FIG. 9 is a diagram showing the remaining battery capacity display device according to the first embodiment of the present invention, and is a flowchart for explaining the 5-segment display flag establishment determination processing procedure. FIG. 10 is a conceptual block diagram showing a remaining battery capacity display device according to the second embodiment of the present invention. FIG. 11 is a diagram showing a remaining battery capacity display device according to the second embodiment of the present invention, and is a diagram showing a threshold map for determining the execution permission. FIG. 12 is a diagram illustrating a remaining battery capacity display device according to the second embodiment of the present invention, and is a flowchart for explaining a procedure for determining whether a 4-segment display flag is established. FIG. 13 is a diagram showing a battery remaining capacity display device according to the second embodiment of the present invention, and is a diagram showing a correction value map based on a current value flowing into the electric load. FIG. 14 is a view showing a remaining battery capacity display device according to the second embodiment of the present invention, and is a view showing a correction value map by SOH of the battery.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
In FIG. 1, a vehicle 1 equipped with a battery remaining capacity display device according to a first embodiment of the present invention includes an internal combustion engine 2, a motor 3, a transmission 4, drive wheels 5, and a battery 6. The electric load 7, the display unit 8, and the control unit 9 are included.

  The engine 2 is constituted by a four-cycle engine that performs a series of four strokes including an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke, and performs ignition in a combustion chamber during the compression stroke and the expansion stroke.

  The motor 3 is constituted by, for example, a three-phase AC motor that is driven by three-phase AC power converted from the power generated by the battery 6. Therefore, the motor 3 functions as an electric motor and generates assist torque that supplements the output torque of the engine 2. Based on the torque command signal from the control unit 9, the motor 3 controls the three-phase AC power so that the output torque becomes the command torque set in the torque command signal.

  Further, the motor 3 is driven by an external force or the like generated when the vehicle 1 is braked, thereby generating three-phase AC power. Therefore, the motor 3 also functions as a generator and generates electric power for charging the battery 6.

  The transmission 4 is provided in a power transmission path from the engine 2 and the motor 3 to the drive wheels 5. The transmission 4 can form any one shift stage among a plurality of shift stages. Specifically, the gear stage of the transmission 4 is changed by a hydraulic circuit (not shown) controlled by the control unit 9.

  The battery 6 is composed of, for example, a lithium ion storage battery. The battery 6 is electrically connected to the motor 3 and the electric load 7. A battery state detection sensor 61 is connected to the battery 6. The battery state detection sensor 61 detects the charge / discharge current, voltage, and battery temperature of the battery 6. The battery state detection sensor 61 is connected to the control unit 9. The controller 9 can detect the charge state and charge / discharge current of the battery 6 based on the output of the battery state detection sensor 61.

  The electric load 7 includes various electric devices that are supplied with power from the battery 6. The electric load 7 includes, for example, a headlight, a blower fan, and the like.

  The display unit 8 displays the remaining capacity of the battery 6. For example, as shown in FIG. 2, the display unit 8 displays the state of the remaining capacity of the battery 6 in five levels by blinking of five LEDs (Light Emitting Diodes). As shown in FIG. 2, a state in which only one LED is lit is referred to as a one-segment display, which indicates that the remaining capacity of the battery 6 is the smallest. 2 LED display when 2 LEDs are lit, 3 segment display when 3 LEDs are lit, 4 segment display when 4 LEDs are lit, 5 LEDs The lighted state is referred to as a 5-segment display, and indicates that the remaining capacity of the battery 6 increases as the number of LEDs to be lighted increases.

  The display unit 8 controls the blinking of the five LEDs in accordance with the display state instruction signal from the control unit 9. The display state instruction signal includes information indicating the segment display to be displayed on the display unit 8.

  The control unit 9 is configured by a computer unit having a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an input port, and an output port. .

  The ROM of the control unit 9 stores a program for causing the computer unit to function as the control unit 9 along with various constants and various maps. That is, in the control unit 9, when the CPU executes a program stored in the ROM, the computer unit functions as the control unit 9 in the present embodiment.

  In addition to the battery state detection sensor 61, various sensors including an engine speed sensor, a vehicle speed sensor, an accelerator opening sensor, a shift position sensor, and a brake switch (not shown) are connected to the input port of the control unit 9. Yes.

  In addition to the motor 3, various control objects including a hydraulic circuit for controlling the transmission 4, an injector (not shown), a spark plug, and a throttle valve are connected to the output port of the control unit 9. .

  The controller 9 controls various control objects based on information obtained from various sensors. For example, the control unit 9 controls the fuel injection amount, the ignition timing, the throttle opening degree, and the like based on the accelerator opening degree detected by the accelerator opening degree sensor and the engine speed detected by the engine speed sensor. The drive of the engine 2 is controlled.

  In addition, the control unit 9 causes the hydraulic circuit to change the gear position of the transmission 4 according to the vehicle speed detected by the vehicle speed sensor, the position of the shift lever detected by the shift position sensor, and the like. .

  The control unit 9 performs idle stop control for automatically stopping and restarting the engine 2 when the vehicle 1 is stopped, and assist traveling control for assisting driving of the engine 2 by driving of the motor 3 to drive the vehicle 1. To do. When the engine 2 is restarted at idle stop, the motor 3 rotates the engine 2 so that the restart is performed.

  The control unit 9 includes a charge state detection unit 91, a charge / discharge state determination unit 92, an electrical load detection unit 93, a deterioration state detection unit 94, a determination unit 95, and a display state setting unit 96. .

  The charging state detection unit 91 detects the SOC as the charging state of the battery 6 from the detection result of the battery state detection sensor 61.

  The charge / discharge state determination unit 92 determines from the detection result of the battery state detection sensor 61 whether the battery 6 is in a charge state or a discharge state.

  The electrical load detection unit 93 detects the current value flowing into the electrical load 7 from the operating state of the electrical equipment that constitutes the electrical load 7.

  Based on the detection result of the battery state detection sensor 61, the deterioration state detection unit 94 sets SOH (State Of Health) as the deterioration state of the battery 6 based on the initial value of the full charge capacity of the battery 6 and the current full charge capacity. To detect. As the SOH, for example, the degree of soundness expressed as a percentage value is used, and 100% represents a sound state. As the value decreases, the degree of soundness decreases and the degree of deterioration increases.

  The determination unit 95 determines whether or not the idle stop control can be executed based on the detection results of the charge state detection unit 91, the charge / discharge state determination unit 92, the electric load detection unit 93, and the deterioration state detection unit 94, and assist travel. Determine whether control can be executed.

  The display state setting unit 96 sets the display state of the remaining capacity of the battery 6 to be displayed on the display unit 8 based on the determination result of the determination unit 95. The display state setting unit 96 measures the time during which the display state displayed on the display unit 8 continues the same state by a built-in timer.

  In the first embodiment, the determination unit 95 performs an execution permission determination that determines whether or not the idle stop control can be executed and whether or not the assist travel control can be executed based on the SOC of the battery 6 detected by the charge state detection unit 91.

  Further, the determination unit 95 performs an execution permission determination for determining whether or not the idle stop control can be executed and whether or not the assist travel control can be executed based on the current value flowing into the electric load 7 detected by the electric load detection unit 93.

  Further, the determination unit 95 performs an execution permission determination for determining whether or not the idle stop control can be executed and whether or not the assist travel control can be executed based on the SOH of the battery 6 detected by the deterioration state detection unit 94.

  Specifically, the determination unit 95 determines whether or not the idle stop control can be executed and whether or not the assist travel control can be executed based on, for example, a “normal” SOC threshold shown in FIG. In addition, the determination unit 95, for example, when the current value flowing into the electrical load 7 detected by the electrical load detection unit 93 is equal to or greater than a predetermined current value set in advance or the battery 6 detected by the deterioration state detection unit 94 When SOH is equal to or less than a predetermined value, whether or not the idle stop control can be executed and whether or not the assist travel control can be executed is determined based on the “change” SOC threshold shown in FIG.

  When the SOC of the battery 6 is equal to or greater than the threshold value shown in FIG. 3, the determination unit 95 permits the operation targeted for the threshold value, that is, idle stop control or assist travel control. The first threshold value and the second threshold value are used in display state determination of the display state setting unit 96 described later.

  The threshold shown in FIG. 3 is obtained in advance by experiments or the like and stored in the ROM of the control unit 9. Each threshold value is set as A <B <C <D and A ′ <B ′ <C ′ <D ′. That is, the threshold value for allowing the assist travel control is set larger than the threshold value for permitting the idle stop control, the first threshold value is set larger than the threshold value for permitting the assist travel control, and the second threshold value is set higher than the first threshold value. It is set large.

  Also, A ≦ A ′, B ≦ B ′, C ≦ C ′, and D ≦ D ′ are set. In other words, when the value of the current flowing into the electric load 7 is large or when the battery 6 is largely deteriorated, a value equal to or greater than the “normal” threshold is set as the “change” threshold.

  The display state setting unit 96 sets the display state of the remaining capacity of the battery 6 to be displayed on the display unit 8 based on the determination result of the determination unit 95 and the above-described first threshold value and second threshold value.

  The display state setting unit 96 determines whether or not the conditions for displaying each of the segments 1 to 5 are satisfied, and transmits a display state instruction signal to the display unit 8 so that the segment display that satisfies the conditions is established. To do.

The display state setting unit 96 transmits a display state instruction signal to the display unit 8 so as to display one segment when all of the following conditions are satisfied.
1a) The determination unit 95 does not permit execution of idle stop control.
1b) The current segment display on the display unit 8 is a one-segment display.
Even when the above condition 1b) is not satisfied, the display state setting unit 96 displays the display state on the display unit 8 so as to display one segment when all the following conditions 1c) and 1d) are satisfied. An instruction signal is transmitted.
1c) The two-segment display on the display unit 8 is continued for a predetermined time or more.
1d) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being charged.

The display state setting unit 96 transmits a display state instruction signal to the display unit 8 so that two-segment display is performed when all of the following conditions are satisfied.
2a) The determination unit 95 permits the execution of the idle stop control.
2b) The current segment display on the display unit 8 is a two-segment display.
Even if the above condition 2b) is not satisfied, the display state setting unit 96 displays the display state on the display unit 8 so as to display two segments when all of the following conditions 2c) and 2d) are satisfied. An instruction signal is transmitted.
2c) The 3-segment display on the display unit 8 continues for a predetermined time or more.
2d) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being charged.

Even if the above condition 2c) is not satisfied, the display state setting unit 96 displays the display state on the display unit 8 so as to display two segments when all of the following conditions 2e) and 2f) are satisfied. An instruction signal is transmitted.
2e) One-segment display on the display unit 8 has continued for a predetermined time or more.
2f) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being discharged.

The display state setting unit 96 transmits a display state instruction signal to the display unit 8 so that three-segment display is performed when all of the following conditions are satisfied.
3a) The determination unit 95 permits the execution of the assist travel control.
3b) The current segment display on the display unit 8 is a three-segment display.
Even if the above condition 3b) is not satisfied, the display state setting unit 96 displays the display state on the display unit 8 so as to display three segments when all the following conditions 3c) and 3d) are satisfied. An instruction signal is transmitted.
3c) The 4-segment display on the display unit 8 continues for a predetermined time or more.
3d) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being charged.

Even if the above condition 3c) is not satisfied, the display state setting unit 96 displays the display state on the display unit 8 so as to display three segments when all the following conditions 3e) and 3f) are satisfied. An instruction signal is transmitted.
3e) The 2-segment display on the display unit 8 has continued for a predetermined time or more.
3f) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being discharged.

The display state setting unit 96 transmits a display state instruction signal to the display unit 8 so as to display four segments when all of the following conditions are satisfied.
4a) The SOC of the battery 6 is not less than the first threshold value.
4b) The current segment display on the display unit 8 is a 4-segment display.
Even if the above condition 4b) is not satisfied, the display state setting unit 96 displays the display state on the display unit 8 so as to display four segments when all the following conditions 4c) and 4d) are satisfied. An instruction signal is transmitted.
4c) The 5-segment display on the display unit 8 continues for a predetermined time or more.
4d) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being charged.

Even if the above condition 4c) is not satisfied, the display state setting unit 96 displays the display state on the display unit 8 so as to display four segments when all the following conditions 4e) and 4f) are satisfied. An instruction signal is transmitted.
4e) The 3-segment display on the display unit 8 continues for a predetermined time or more.
4f) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being discharged.

The display state setting unit 96 transmits a display state instruction signal to the display unit 8 so that a 5-segment display is performed when all of the following conditions are satisfied.
5a) The SOC of the battery 6 is greater than or equal to the second threshold value.
5b) The current segment display on the display unit 8 is a 5-segment display.
Even when the above condition 5b) is not satisfied, the display state setting unit 96 displays the display state on the display unit 8 so as to display five segments when all of the following conditions 5c) and 5d) are satisfied. An instruction signal is transmitted.
5c) The 4-segment display on the display unit 8 continues for a predetermined time or more.
5d) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being discharged.

  The display state setting unit 96 continues the display on the display unit 8 when none of the above conditions is satisfied.

  The remaining battery capacity display processing by the remaining battery capacity display device according to the first embodiment configured as described above will be described with reference to FIG. Note that the remaining battery capacity display process described below is started when the control unit 9 starts operating, and is executed at a preset time interval.

  Here, the display state setting unit 96 includes 1 to 5 segment display flags. The display state setting unit 96 sets “Established” to each segment display flag when the conditions for displaying each segment from 1 to 5 are satisfied, and the conditions for displaying each segment from 1 to 5 If “successful” is not established, “not established” is set in each segment display flag. Each of the segment display flags 1 to 5 is initially set to “not established” before the battery remaining capacity display process is started.

  First, the display state setting unit 96 executes a 5-segment display flag establishment determination process to be described later (step S1), and determines whether “established” is set in the 5-segment display flag (step S2). When it is determined that “Established” is set in the segment display flag, a display state instruction signal is sent to the display unit 8 to instruct 5 segment display to display 5 segments (step S3), and processing Exit.

  On the other hand, if it is determined that “established” is not set in the 5-segment display flag, the display state setting unit 96 executes a 4-segment display flag establishment determination process described later (step S4), and sets the 4-segment display flag to “ It is determined whether or not “established” is set (step S5), and when it is determined that “established” is set in the 4-segment display flag, a display state instructing the display unit 8 to perform 4-segment display An instruction signal is transmitted to display four segments (step S6), and the process ends.

  On the other hand, if it is determined that “established” is not set in the 4-segment display flag, the display state setting unit 96 executes a 3-segment display flag establishment determination process described later (step S7). It is determined whether or not “established” is set (step S8). When it is determined that “established” is set in the three-segment display flag, a display state instructing the display unit 8 to perform three-segment display An instruction signal is transmitted to display 3 segments (step S9), and the process is terminated.

  On the other hand, if it is determined that “established” is not set in the three-segment display flag, the display state setting unit 96 executes a two-segment display flag establishment determination process described later (step S10), It is determined whether or not “established” is set (step S11). When it is determined that “established” is set in the two-segment display flag, a display state instructing the display unit 8 to perform two-segment display An instruction signal is transmitted to display two segments (step S12), and the process ends.

  On the other hand, when it is determined that “established” is not set in the 2-segment display flag, the display state setting unit 96 executes a 1-segment display flag establishment determination process described later (step S13), and the 1-segment display flag indicates “ It is determined whether or not “established” is set (step S14). When it is determined that “established” is set in the one-segment display flag, a display state instructing the display unit 8 to perform one-segment display An instruction signal is transmitted to display one segment (step S15), and the process ends.

  On the other hand, if it is determined that “established” is not set in the one-segment display flag, the display state setting unit 96 continues the current display (step S16) and ends the process.

  Next, the one-segment display flag establishment determination process will be described with reference to FIG. First, the display state setting unit 96 determines whether or not the execution of the idle stop control is permitted by the determination unit 95 (step S21). When it is determined that the execution of the idle stop control is permitted, the display state setting unit 96 ends the one-segment display flag establishment determination process.

  On the other hand, when it is determined that the execution of the idle stop control is not permitted, the display state setting unit 96 determines whether or not the current segment display on the display unit 8 is a one-segment display (step S22). If it is determined that the current segment display is not a one-segment display, the display state setting unit 96 determines whether or not the two-segment display is displayed on the display unit 8 and continues for three seconds or more (step) S23). When it is determined that the 2-segment display has not continued for 3 seconds or more, the display state setting unit 96 ends the 1-segment display flag establishment determination process.

  On the other hand, when it is determined that the 2-segment display continues for 3 seconds or more, the display state setting unit 96 determines whether or not the battery 6 is being charged (step S24). When it is determined that the battery 6 is being charged, the display state setting unit 96 ends the one-segment display flag establishment determination process.

  On the other hand, when it is determined that the battery 6 is not being charged, or when it is determined in step S22 that the current segment display is a one-segment display, the display state setting unit 96 sets “established” to the one-segment display flag. (Step S25), the one-segment display flag establishment determination process is terminated.

  Next, the 2-segment display flag establishment determination process will be described with reference to FIG. First, the display state setting unit 96 determines whether or not the execution of the idle stop control is permitted by the determination unit 95 (step S31). When it is determined that the execution of the idle stop control is not permitted, the display state setting unit 96 ends the 2-segment display flag establishment determination process.

  On the other hand, when it is determined that the execution of the idle stop control is permitted, the display state setting unit 96 determines whether or not the current segment display on the display unit 8 is a two-segment display (step S32). When it is determined that the current segment display is not the two-segment display, the display state setting unit 96 determines whether or not the three-segment display is displayed on the display unit 8 and continues for three seconds or more (step) S33). When it is determined that the 3-segment display continues for 3 seconds or more, the display state setting unit 96 determines whether or not the battery 6 is being charged (step S34). When it is determined that the battery 6 is being charged, the display state setting unit 96 ends the 2-segment display flag establishment determination process.

  If it is determined in step S33 that the 3-segment display has not continued for 3 seconds or longer, the display state setting unit 96 determines whether 1-segment display has been performed on the display unit 8 and has continued for 3 seconds or longer. Is determined (step S35). When it is determined that the 1-segment display has not continued for 3 seconds or more, the display state setting unit 96 ends the 2-segment display flag establishment determination process.

  On the other hand, when it is determined that the one-segment display continues for 3 seconds or more, the display state setting unit 96 determines whether or not the battery 6 is being discharged (step S36). When it is determined that the battery 6 is being discharged, the display state setting unit 96 ends the 2-segment display flag establishment determination process.

  On the other hand, when it is determined that the battery 6 is not being discharged, when it is determined in step S32 that the current segment display is a two-segment display, or when it is determined in step S34 that the battery 6 is not being charged, the display The state setting unit 96 sets “established” to the 2-segment display flag (step S37), and ends the 2-segment display flag establishment determination process.

  Next, the 3-segment display flag establishment determination process will be described with reference to FIG. First, the display state setting unit 96 determines whether or not the execution of the assist travel control is permitted by the determination unit 95 (step S41). When it is determined that the execution of the assist travel control is not permitted, the display state setting unit 96 ends the 3-segment display flag establishment determination process.

  On the other hand, when it determines with execution of assist driving | running | working control being permitted, the display state setting part 96 determines whether the present segment display of the display part 8 is 3 segment display (step S42). When it is determined that the current segment display is not the three-segment display, the display state setting unit 96 determines whether or not the four-segment display is displayed on the display unit 8 and continues for three seconds or more (step) S43). When it is determined that the 4-segment display continues for 3 seconds or more, the display state setting unit 96 determines whether or not the battery 6 is being charged (step S44). When it is determined that the battery 6 is being charged, the display state setting unit 96 ends the three-segment display flag establishment determination process.

  When it is determined in step S43 that the 4-segment display has not continued for 3 seconds or more, the display state setting unit 96 determines whether the 2-segment display has been performed on the display unit 8 and has continued for 3 seconds or more. Is determined (step S45). When it is determined that the 2-segment display has not continued for 3 seconds or longer, the display state setting unit 96 ends the 3-segment display flag establishment determination process.

  On the other hand, when it is determined that the 2-segment display continues for 3 seconds or more, the display state setting unit 96 determines whether or not the battery 6 is being discharged (step S46). When it is determined that the battery 6 is being discharged, the display state setting unit 96 ends the 3-segment display flag establishment determination process.

  On the other hand, when it is determined that the battery 6 is not being discharged, when it is determined in step S42 that the current segment display is a three-segment display, or when it is determined in step S44 that the battery 6 is not being charged, the display The state setting unit 96 sets “established” to the 3-segment display flag (step S47), and ends the 3-segment display flag establishment determination process.

  Next, the 4-segment display flag establishment determination process will be described with reference to FIG. First, the display state setting unit 96 determines whether or not the SOC of the battery 6 is greater than or equal to the first threshold value (step S51). When it is determined that the SOC is not equal to or greater than the first threshold, the display state setting unit 96 ends the 4-segment display flag establishment determination process.

  On the other hand, when it is determined that the SOC is equal to or greater than the first threshold, the display state setting unit 96 determines whether or not the current segment display on the display unit 8 is a 4-segment display (step S52). When it is determined that the current segment display is not the 4-segment display, the display state setting unit 96 determines whether or not the 5-segment display is displayed on the display unit 8 and continues for 3 seconds or more (step) S53). When it is determined that the 5-segment display continues for 3 seconds or more, the display state setting unit 96 determines whether or not the battery 6 is being charged (step S54). When it is determined that the battery 6 is being charged, the display state setting unit 96 ends the 4-segment display flag establishment determination process.

  If it is determined in step S53 that the 5-segment display has not continued for 3 seconds or longer, the display state setting unit 96 determines whether the 3-segment display has been performed on the display unit 8 and has continued for 3 seconds or longer. Is determined (step S55). When it is determined that the 3-segment display has not continued for 3 seconds or longer, the display state setting unit 96 ends the 4-segment display flag establishment determination process.

  On the other hand, when it is determined that the 3-segment display continues for 3 seconds or more, the display state setting unit 96 determines whether or not the battery 6 is being discharged (step S56). When it is determined that the battery 6 is being discharged, the display state setting unit 96 ends the 4-segment display flag establishment determination process.

  On the other hand, when it is determined that the battery 6 is not being discharged, when it is determined in step S52 that the current segment display is a 4-segment display, or when it is determined in step S54 that the battery 6 is not being charged, the display The state setting unit 96 sets “established” to the 4-segment display flag (step S57), and ends the 4-segment display flag establishment determination process.

  Next, the 5-segment display flag establishment determination process will be described with reference to FIG. First, the display state setting unit 96 determines whether or not the SOC of the battery 6 is greater than or equal to a second threshold (step S61). If it is determined that the SOC is not equal to or greater than the second threshold, the display state setting unit 96 ends the 5-segment display flag establishment determination process.

  On the other hand, when it is determined that the SOC is greater than or equal to the second threshold, the display state setting unit 96 determines whether or not the current segment display on the display unit 8 is a 5-segment display (step S62). When it is determined that the current segment display is not the 5-segment display, the display state setting unit 96 determines whether or not the 4-segment display is displayed on the display unit 8 and continues for 3 seconds or more (step) S63). When it is determined that the 4-segment display has not continued for 3 seconds or longer, the display state setting unit 96 ends the 5-segment display flag establishment determination process.

  On the other hand, when it is determined that the 4-segment display continues for 3 seconds or more, the display state setting unit 96 determines whether or not the battery 6 is being discharged (step S64). When it is determined that the battery 6 is being discharged, the display state setting unit 96 ends the 5-segment display flag establishment determination process.

  On the other hand, if it is determined that the battery 6 is not being discharged, or if it is determined in step S62 that the current segment display is a 5-segment display, the display state setting unit 96 sets “established” to the 5-segment display flag. (Step S65), the 5-segment display flag establishment determination process is terminated.

  As described above, in the first embodiment, the idle stop control for restarting the engine 2 by the driving force of the motor 3 and the assist traveling control for driving the vehicle 1 by assisting the driving of the engine 2 by the driving of the motor 3 are performed. And a display state setting unit 96 that sets a segment display to be displayed on the display unit 8 based on the determination result determined by the determination unit 95.

  Thereby, the segment display of the display part 8 is set based on the determination result of whether or not the execution of the idle stop control and the assist travel control is permitted. For this reason, it is possible to prevent the idling stop or the assist running from being performed while the segment display on the display unit 8 is the same display, and usability can be improved.

  The determination unit 95 determines whether or not the idle stop control can be executed and whether or not the assist travel control can be executed based on the SOC threshold value of the battery 6. Further, the determination unit 95 determines whether the SOH of the battery 6 detected by the deterioration state detection unit 94 is detected when the current value flowing into the electric load 7 detected by the electric load detection unit 93 is equal to or greater than a predetermined current value set in advance. When the value is equal to or less than the predetermined value, the SOC threshold value of the battery 6 is changed to determine whether or not the idle stop control can be executed and whether or not the assist travel control can be executed.

  Thereby, the segment display of the display unit 8 is set based on the determination result of the execution permission determination determined based on the SOC of the battery 6 and the current value flowing into the electric load 7 or the SOH of the battery 6. For this reason, the segment display of the display part 8 can be set corresponding to the SOC of the battery 6, the current value flowing into the electric load 7, and the SOH of the battery 6, and usability can be improved.

  Further, the display state setting unit 96 does not change the segment display unless the segment display currently displayed on the display unit 8 continues for a predetermined time or longer.

Thereby, the rapid change of the segment display of the display part 8 can be eliminated, and usability can be improved.
In the flowchart according to the present embodiment, the case where the predetermined time is set to 3 seconds is shown, but the same effect can be obtained if the predetermined time is an appropriate time in design.

  The display state setting unit 96 sets the segment display of the display unit 8 based on the charge / discharge state of the battery 6.

  This suppresses the display that the remaining capacity has increased while the battery 6 is being discharged or the display that the remaining capacity has decreased while the battery 6 is being charged, improving usability. Can be made.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. Here, since the second embodiment is configured in substantially the same manner as the above-described first embodiment, the same components are denoted by the same reference numerals and the characteristic portions will be described with reference to the drawings.

  In the vehicle 10 in FIG. 10, the output shaft of the engine 2 and the output shaft of the motor 3 are connected on the same axis. The output shaft of the engine 2 and the output shaft of the motor 3 can be connected and disconnected. The output shaft of the engine 2 and the output shaft of the motor 3 are connected, and the output torque of the engine 2 is increased by the output torque of the motor 3. Assist driving is performed to assist. Further, the output shaft of the engine 2 and the output shaft of the motor 3 are disconnected, and the motor travel is performed in which the vehicle 10 is driven only by the output torque of the motor 3.

  It should be noted that the output shaft of the engine 2 and the output shaft of the motor 3 are connected on the same axis, and the output shaft of the engine 2 and the output shaft of the motor 3 are not always connectable and connectable, and assist driving In the configuration in which only the control is performed, the same effect can be obtained by the control of the first embodiment.

  In the execution permission determination, the determination unit 97 of the second embodiment determines whether or not the motor travel control can be executed in addition to whether or not the idle stop control and the assist travel control can be executed.

  Based on the SOC of the battery 6 detected by the state of charge detection unit 91, the determination unit 97 performs an execution permission determination that determines whether or not the idle stop control can be performed, whether or not the assist travel control can be performed, and whether or not the motor travel control can be performed. Do.

  Further, the determination unit 97 determines whether or not the idle stop control can be performed, whether or not the assist travel control is performed, and whether or not the motor travel control is performed based on the current value flowing into the electrical load 7 detected by the electrical load detection unit 93. An execution permission determination is performed.

  Further, the determination unit 97 determines whether to execute the idle stop control, whether to execute the assist travel control, or whether to execute the motor travel control based on the SOH of the battery 6 detected by the deterioration state detection unit 94. Make a decision.

  Specifically, for example, the determination unit 97 determines whether or not the idle stop control can be executed, whether or not the assist travel control can be executed, and whether or not the motor travel control can be executed based on the “normal” SOC threshold shown in FIG. judge. In addition, the determination unit 97, for example, when the current value flowing into the electrical load 7 detected by the electrical load detection unit 93 is equal to or greater than a predetermined current value set in advance or the battery 6 detected by the deterioration state detection unit 94 When SOH is equal to or less than a predetermined value, it is determined whether or not the idle stop control can be performed, whether or not the assist travel control can be performed, and whether or not the motor travel control can be performed based on the “change” SOC threshold shown in FIG.

  When the SOC of the battery 6 is equal to or greater than the threshold value shown in FIG. 11, the determination unit 97 permits the operation targeted for the threshold value, that is, the idle stop control, the assist travel control, or the motor travel control. The second threshold value is used in determining the display state of the display state setting unit 98 described later.

  The threshold shown in FIG. 11 is obtained in advance by experiments or the like and stored in the ROM of the control unit 9. Each threshold value is set as A <B <C <D and A ′ <B ′ <C ′ <D ′. In other words, the threshold for allowing assist travel control is set to be larger than the threshold for permitting idle stop control, the threshold for permitting motor travel control is set to be greater than the threshold for permitting assist travel control, and motor travel control is permitted. The second threshold value is set larger than the threshold value.

  Also, A ≦ A ′, B ≦ B ′, C ≦ C ′, and D ≦ D ′ are set. In other words, when the value of the current flowing into the electric load 7 is large or when the battery 6 is largely deteriorated, a value equal to or greater than the “normal” threshold is set as the “change” threshold.

  The display state setting unit 98 sets the display state of the remaining capacity of the battery 6 to be displayed on the display unit 8 based on the determination result of the determination unit 97 and the above-described second threshold value.

  The display state setting unit 98 determines whether or not a condition for displaying each of the segments 1 to 5 is satisfied, and transmits a display state instruction signal to the display unit 8 so as to obtain a segment display that satisfies the condition. To do.

   The display state setting unit 98 determines the conditions for 1, 2, 3, and 5 segment display under the same conditions as in the first embodiment.

The display state setting unit 98 transmits a display state instruction signal to the display unit 8 so as to display four segments when all of the following conditions are satisfied.
6a) The determination unit 97 permits the execution of the motor travel control.
6b) The current segment display on the display unit 8 is a 4-segment display.
Even if the above condition 6b) is not satisfied, the display state setting unit 98 displays the display state on the display unit 8 so as to display four segments when all of the following conditions 6c) and 6d) are satisfied. An instruction signal is transmitted.
6c) The 5-segment display on the display unit 8 continues for a predetermined time or more.
6d) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being charged.

Even when the above condition 6c) is not satisfied, the display state setting unit 98 displays the display state on the display unit 8 so as to display four segments when all of the following conditions 6e) and 6f) are satisfied. An instruction signal is transmitted.
6e) The 3-segment display on the display unit 8 has continued for a predetermined time or more.
6f) It is determined by the charge / discharge state determination unit 92 that the battery 6 is not being discharged.

  The remaining battery capacity display process performed by the remaining battery capacity display device according to the second embodiment configured as described above will be described with reference to FIG. Since the second embodiment is different from the first embodiment only in the 4-segment display flag establishment determination process, only the 4-segment display flag establishment determination process will be described here.

  Here, the display state setting unit 98 includes 1 to 5 segment display flags. The display state setting unit 98 sets “established” to each segment display flag when the conditions for displaying each segment from 1 to 5 are satisfied, and the conditions for setting each segment display from 1 to 5 If “successful” is not established, “not established” is set in each segment display flag. Each of the segment display flags 1 to 5 is initially set to “not established” before the battery remaining capacity display process is started.

  First, the display state setting unit 98 determines whether or not the motor traveling control is permitted by the determination unit 97 (step S71). If it is determined that the execution of the motor traveling control is not permitted, the display state setting unit 98 ends the 4-segment display flag establishment determination process.

  On the other hand, when it is determined that the execution of the motor traveling control is permitted, the display state setting unit 98 determines whether or not the current segment display on the display unit 8 is a 4-segment display (step S72). When it is determined that the current segment display is not the 4-segment display, the display state setting unit 98 determines whether or not the 5-segment display is displayed on the display unit 8 and continues for 3 seconds or more (step) S73). When it is determined that the 5-segment display continues for 3 seconds or more, the display state setting unit 98 determines whether or not the battery 6 is being charged (step S74). When it is determined that the battery 6 is being charged, the display state setting unit 98 ends the 4-segment display flag establishment determination process.

  If it is determined in step S73 that the 5-segment display has not continued for 3 seconds or longer, the display state setting unit 98 determines whether the 3-segment display has been performed on the display unit 8 and has continued for 3 seconds or longer. Is determined (step S75). When it is determined that the 3-segment display has not continued for 3 seconds or longer, the display state setting unit 98 ends the 4-segment display flag establishment determination process.

  On the other hand, when it is determined that the three-segment display continues for 3 seconds or longer, the display state setting unit 98 determines whether or not the battery 6 is being discharged (step S76). When it is determined that the battery 6 is being discharged, the display state setting unit 98 ends the 4-segment display flag establishment determination process.

  On the other hand, when it is determined that the battery 6 is not being discharged, when it is determined in step S72 that the current segment display is a 4-segment display, or when it is determined in step S74 that the battery 6 is not being charged, the display The state setting unit 98 sets “established” to the 4-segment display flag (step S77), and ends the 4-segment display flag establishment determination process.

  Thus, in the second embodiment, the idle stop control for restarting the engine 2 by the driving force of the motor 3, the assist travel control for driving the vehicle 10 by assisting the driving of the engine 2 by the driving of the motor 3, and the motor 3. A determination unit 97 that determines whether or not to execute the motor traveling control that causes the vehicle 10 to travel using only the output torque of the vehicle, and a segment display that is displayed on the display unit 8 based on the determination result determined by the determination unit 97 A display state setting unit 98 for setting

  Thereby, the segment display of the display part 8 is set based on the determination result of whether execution of idle stop control, assist traveling control, and motor traveling control is permitted. For this reason, while the segment display of the display part 8 is the same display, it can prevent that idle stop, assist driving | running | working, or motor driving | running | working is not performed, and usability can be improved.

  In the first and second embodiments described above, when referring to the threshold maps of FIGS. 3 and 11, the “normal” threshold is set based on the current value flowing into the electrical load 7 and the SOH of the battery 6. It is decided whether to use the threshold value of “change” or not, but the threshold value is calculated by multiplying or adding the correction value based on the current value flowing into the electric load 7 or the SOH of the battery 6 to the “normal” threshold value. It doesn't matter.

  For example, a correction value based on the current value flowing into the electric load 7 as shown in FIG. 13 or a correction value based on the SOH of the battery 6 as shown in FIG. 14 is used.

  In FIG. 13, the correction value increases as the current value flowing into the electrical load 7 increases, and the threshold value increases as a result of multiplication or addition.

  In FIG. 14, the correction value increases as the deterioration state of the battery 6 increases (the SOH value decreases), and the threshold value increases as a result of multiplication or addition.

It is preferable that these correction values have a minimum value of 1 when multiplying and a minimum value of zero when adding.

  Further, as the display form of the display unit 8, five levels are blinked and five levels are displayed, but may be displayed in five levels or may be displayed with five types of icons. Further, whether or not idle stop control is permitted, whether or not assist traveling control is permitted, and the like may be displayed. Moreover, you may make it display combining the above-mentioned several display form.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Motor 6 Battery 7 Electric load 8 Display part 9 Control part 10 Vehicle 61 Battery state detection sensor 91 Charging state detection part 92 Charging / discharging state determination part 93 Electric load detection part 94 Degradation state detection part 95 Determination part 96 Display state setting Part 97 Judgment part 98 Display state setting part

Claims (3)

A battery remaining capacity display device for a vehicle comprising an engine, a battery, and a motor driven by electric power supplied from the battery,
A display unit for displaying a state of the remaining capacity of the battery;
Idle stop control for restarting the engine by the driving force of the motor, assist travel control for assisting the drive of the engine by driving of the motor to travel the vehicle, and the vehicle using only the motor as a travel drive source A determination unit that performs an execution permission determination to determine whether or not to permit execution of any one or more of the motor traveling control to travel;
A display state setting unit for setting the state of the remaining capacity of the battery to be displayed on the display unit based on the determination result determined by the determination unit;
A charge / discharge state determination unit that determines whether the battery is being charged or discharged ,
The said display state setting part is a battery remaining capacity display apparatus which sets the state of the remaining capacity of the said battery displayed on the said display part based on the information determined by the said charging / discharging state determination part .   The determination unit performs the execution permission determination based on a state of charge of the battery and one or more of a current value flowing into an electric load supplied with power from the battery and a deterioration state of the battery. Item 8. A remaining battery capacity display device according to Item 1.   The battery remaining capacity display device according to claim 1, wherein the display state setting unit sets a state of the remaining battery capacity to be displayed on the display unit based on a state currently displayed on the display unit.

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