JP2019105595A - Secondary battery system for vehicle - Google Patents

Abstract

To provide a secondary battery system for a vehicle that displays an SOH while dispelling a feeling of discomfort imparted to a driver without lowering visibility of an SOC.SOLUTION: A secondary battery system for a vehicle has: a secondary battery 11; voltage detection means 11a which detects a voltage of the secondary battery; current detection means 11b which detects a current of the secondary battery; SOC calculation means 52 which calculates an SOC of the secondary battery based upon the voltage and current of the secondary battery; SOH calculation means 54 which calculates an SOH of the secondary battery based upon the voltage and current detected by the voltage detection means and current detection means; display means which displays a pattern showing the SOC calculated by the SOC calculation means and the SOH calculated by the SOH calculation means; and control means 50 which controls the display means. The control means makes a display by varying a length in a longitudinal direction or lateral direction of the pattern according to the SOC calculated by the SOC calculation means, and also by changing the design of the pattern according to the SOH calculated by the SOH calculation means.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a secondary battery system of a vehicle, and more particularly to a technique for displaying SOH and SOC at one time.

For example, a secondary battery is mounted on an electric car equipped with a motor or a hybrid vehicle having an engine and a motor in order to drive the motor.
The secondary battery mounted in such a vehicle has a problem that it is repeatedly charged and discharged by power supply to a motor, power generation by so-called regenerative braking, and power feeding at a power supply site to deteriorate.

As described above, when the secondary battery is deteriorated, the maximum storage amount is reduced, and the cruising distance of the vehicle is reduced, which is not preferable.
By the way, vehicles such as electric vehicles these days have a large number of parts related to electrical equipment, and there is an increase in the number of instruments of the parts related to electrical equipment, so there is a space for newly providing an instrument that displays the maximum storage capacity of the secondary battery. There is a problem that the driver's viewable range such as an instrument panel is small.

  Therefore, the degree of deterioration (State Of Health, abbreviated as SOH) of the secondary battery, with the maximum storage capacity at the time of new battery being 100%, is referred to as the remaining capacity of the secondary battery (State Of Charge, abbreviated) in the vertical direction. A technology has been developed in which the SOH and the SOC are displayed as squares so that the driver can visually recognize the maximum storage amount in advance so that the SOC is expressed in the lateral direction (Patent Document 1).

JP, 2009-208484, A

However, in the technique disclosed in Patent Document 1, when the SOH decreases, the width in the vertical direction of the quadrilateral is reduced, the area of the quadrilateral decreases, and the SOC becomes difficult to see, so there is room for further improvement.
In addition, the secondary battery needs to be replaced when the SOH reaches the use limit value. At this time, a sense of duty or annoyance arises that the driver must replace the secondary battery. Therefore, the driver is not dispelled by such a sense of discomfort as SOH indicates the use limit value only by numerical and geometrical displays, and thus the vehicle on which the secondary battery is mounted is re-arranged. It will reduce the willingness to buy and is not desirable.

  This invention is made in view of such a subject, and the place made into the purpose is a vehicle which can display SOH, wiping off the discomfort given to a driver, without reducing the visibility of SOC. To provide a secondary battery system.

  In order to achieve the above object, a secondary battery system of a vehicle according to the present invention comprises a secondary battery mounted on a vehicle, voltage detection means for detecting a voltage of the secondary battery, and current of the secondary battery. Current detection means for detecting, SOC calculation means for calculating the SOC of the secondary battery based on the voltage and current detected by the voltage detection means and the current detection means, the voltage detection means and the current detection means A SOH calculating means for calculating the SOH of the secondary battery based on the detected voltage and current, a pictorial diagram showing the SOC calculated by the SOC calculating means and the SOH calculated by the SOH calculating means are displayed A display means; and a control means for controlling the display means, wherein the control means controls the picture according to the SOC calculated by the SOC calculation means. Change either the length of the vertical or horizontal direction, and displaying by changing the design of the pictorial depending on SOH calculated by the SOH calculation unit.

  Thereby, either the length in the vertical direction or the lateral direction of the picture is changed according to the SOC calculated by the SOC calculation means, and the design of the picture is changed according to the SOH calculated by the SOH calculation means. By displaying, it is possible to display the SOC and the SOH in a pictorial view only, and to maintain the visibility of the SOC regardless of the decrease in the SOH. Also, for example, when the pictorial diagram is a pictogram indicating the weather, the driver can sensibly recognize the deterioration of the secondary battery by changing the design from the clear state to a design in which the weather gradually collapses as the SOH decreases. It is possible to eliminate the unpleasant feeling for the replacement of the secondary battery.

In another aspect, the pictorial drawing is a character having an expression, and the design is preferably the expression of the character.
Thus, for example, by changing the expression so that the expression of the character gradually becomes clouded with the decrease in SOH, the driver has a sense of affinity with the character and exchanges the secondary battery to make the expression of the character brighter. Do. As a result, the driver is able to replace the secondary battery while being favorably wiped out the unpleasant feeling for the replacement of the secondary battery.

  In another aspect, the storage device has SOC storage means for storing a change history of SOC of the secondary battery, and the display means displays a line graph, and the control means is stored by the SOC storage means. It is preferable that the line graph is formed based on the fluctuation history of the SOC of the secondary battery, and the pictorial drawing is displayed at a position corresponding to the latest history of the line graph.

As a result, it is possible to sensuously recognize how much the secondary battery has deteriorated due to the SOC fluctuation while visually recognizing the SOC fluctuation history.
In another aspect, the SOC storage means further stores a charge / discharge factor used when the secondary battery fluctuates, and the display means indicates a charge / discharge factor guide indicating the charge / discharge factor by characters. Is further displayed, and the control means preferably causes the charge / discharge factor guidance to be displayed at a position corresponding to the time when the charge / discharge factor of the line graph is used.

  As a result, the charge / discharge factor causing the inclination of the line graph can be transmitted to the driver. For example, the driver recognizes the charging speed of the quick charger used for charging and the degree of discharge by the air conditioner. Is made possible.

  According to the secondary battery system of the vehicle of the present invention, the SOH calculated by the SOH calculating unit changes the length of either the vertical direction or the horizontal direction of the drawing according to the SOC calculated by the SOC calculating unit. By changing and displaying the design of the drawing according to, it is possible to display the SOC and the SOH only in the drawing and to maintain the visibility of the SOC regardless of the decrease in the SOH. Also, for example, when the pictorial diagram is a pictogram indicating the weather, the driver can sensibly recognize the deterioration of the secondary battery by changing the design from the clear state to a design in which the weather gradually collapses as the SOH decreases. It is possible to suppress discomfort for replacement of the secondary battery.

  As a result, it is possible to display the SOH while suppressing the unpleasant feeling for the replacement of the secondary battery given to the driver without reducing the visibility of the SOC.

It is a schematic block diagram of the vehicle in a 1st embodiment. It is a top view of a meter panel. In the first embodiment, part A in FIG. 2 when SOC is 100% and SOH is 90 to 100%, 80 to 90%, 70 to 80%, and less than 70%. It is the comparison figure which aligned the enlarged view of. In the first embodiment, part A in FIG. 2 when SOC is 30% and SOH is 90 to 100%, 80 to 90%, 70 to 80%, and less than 70%. It is the comparison figure which aligned the enlarged view of. In another embodiment, when the SOC is 100%, the SOH is 90 to 100%, 80 to 90%, 70 to 80%, and less than 70%, the portion A in FIG. It is the comparison figure which arranged the enlarged view horizontally. It is a schematic block diagram of the vehicle 1 in 2nd Embodiment. It is an enlarged view of A part in FIG. 2 in case SOH is 90 to 100% in 2nd Embodiment.

Hereinafter, an embodiment of the present invention will be described based on the drawings.
First Embodiment
Referring to FIG. 1, a schematic configuration view of a vehicle 1 in the first embodiment is shown.
The vehicle 1 is a so-called electric car on which a driving wheel 3, a motor 7, a reduction gear 9, a battery (secondary battery) 11, and a driver's seat 20 are mounted. Electric power is supplied from the battery 11 and the motor 7 is driven, and the driving wheel 3 can be driven via the reduction gear 9 to accelerate the vehicle 1. Further, the motor 7 can generate electric power by transmitting the driving force from the driving wheels 3 driven by the traveling vehicle 1 through the reduction gear 9 and can supply electric power to the battery 11, and the electric power is driven by the electric power generation. The vehicle 1 can be decelerated by operating a so-called regenerative brake that decelerates the wheel 3.

In the driver's seat 20, a meter panel 23 is disposed on an instrumental panel (not shown).
Referring to FIG. 2, a plan view of the meter panel 23 is shown.
The meter panel 23 is a liquid crystal panel on which the speed meter 25, the SOC meter (display means) 27, and the regenerative gauge 29 are displayed.

The speed meter 25 is an image imitating, for example, an analog meter or an analog meter, and the driver can visually recognize the speed of the vehicle 1 by designating a scale or a numerical value not shown according to the vehicle speed of the vehicle 1.
The regenerative gauge 29 is an image imitating, for example, an analog meter or an analog meter, and the driver visually recognizes the use condition of the electric power of the motor 7 by instructing a scale or a numerical value not shown according to the use condition of the electric power of the motor 7 It is possible.

The SOC meter 27 displays the remaining capacity (hereinafter referred to as SOC) of the battery 11 and the degree of deterioration of the battery 11 (hereinafter referred to as SOH).
Returning to FIG. 1, the battery 11 is provided with a voltage sensor (voltage detection unit) 11 a and a current sensor (current detection unit) 11 b, and the voltage and current of the battery 11 are detected, respectively.

  The ECU (control means) 50 is a control device for performing comprehensive control including operation control of the motor 7, and is an input / output device, a storage device (ROM, RAM, non-volatile RAM, etc.), a central processing unit ( CPU) etc. are comprised. In particular, the ECU 50 is provided with an SOC calculation unit (SOC calculation means) 52 and an SOH calculation unit (SOH calculation means) 54, and the battery 11 detected by the voltage sensor 11a and the current sensor 11b provided in the battery 11 The SOC and SOH of the battery 11 are calculated based on the voltage and current of

A meter panel 23 is electrically connected to the output side of the ECU 50, and an SOC meter is controlled by controlling the meter panel 23 based on the SOC and SOH of the battery 11 calculated by the SOC calculation unit 52 and the SOH calculation unit 54. 27 can be changed.
Referring to FIG. 3, in the first embodiment, when SOC is 100% and SOH is 90 to 100%, 80 to 90%, 70 to 80%, and less than 70%. A comparative view is shown in which the SOC meter 27, that is, the enlarged view of the portion A in FIG. Further, referring to FIG. 4, in the first embodiment, when SOC is 30% and SOH is 90 to 100%, 80 to 90%, 70 to 80%, and less than 70%. The comparison figure which put in order the enlarged view of A part in FIG. 2 of the time is shown. Hereinafter, the SOC meter 27 according to the first embodiment will be described in detail based on FIGS. 3 and 4.

  The SOC meter 27 is composed of a spirit display character (picture, character) 40 and a guide line 43. The guide line 43 is a vertically extending scale serving as an index of 0% to 100% of the SOC. In the guide line 43, an initial letter E of Empty is given near the lower end, and an initial letter F of Full is given near the upper end. That is, the upper end of the guide wire 43 indicates that the SOC of the battery 11 is 100%, that is, the battery 11 is fully charged, and the lower end indicates that the SOC of the battery 11 is 0%, that is, the battery 11 is completely discharged.

The size (length) of the fineness display character 40 changes in the vertical direction according to the SOC of the battery 11 calculated by the SOC calculation unit 52.
Specifically, when the SOC of the battery 11 is 100%, ie, the battery 11 is in a fully charged state, the energy display character 40 is displayed in the vertical direction as shown in FIG. Further, as the SOC of the battery 11 decreases, the energy display character 40 is displayed by being vertically expanded and contracted so that the uppermost portion 41 thereof becomes a position corresponding to the value indicated by the guide line 43 and the SOC. Although the fineness display character 40 changes the size in the vertical direction according to the SOC of the battery 11 calculated by the SOC calculation unit 52, the size in the horizontal direction may change.

  In addition, the spirit display character 40 is displayed as a design that simulates the expression when the SOH of the battery 11 calculated by the SOH calculation unit 54 is 90% to 100%, which is an extremely upset expression (design) 40a And when the SOH is 80% to 90%, it is displayed as a smiling state pictorial (design) 40b that is a design that simulates a good-looking expression, and when the SOH is 70% to 80%, it mimics an expressionless expression It is displayed as a normal state pictorial (design) 40c which is a design, and when the SOH is less than 70%, it is displayed as a disordered state pictorial (design) 40d which is an imitation of an expression when ill.

  That is, since the SOC meter 27 expresses the SOH of the battery 11 by changing the expression that is the design of the spirit display character 40, the driver can sense the SOH sensuously, and the driver visually recognizes the SOH of the battery 11 It is possible to improve the quality. Further, since the SOH is displayed without narrowing the width of the fineness display character 40 in the left-right direction, the visibility of the SOC can be maintained even if the battery 11 is deteriorated and the SOH is lowered.

In addition, since the spirit display character 40 expresses SOH by expression, it is possible to give the driver attachment or closeness, and even if the SOH becomes less than 70% and the battery 11 needs to be replaced, the driver can not It can eliminate the discomfort that it gives.
Hereinafter, another example according to the first embodiment will be described based on FIG.
Referring to FIG. 5, another embodiment in which the SOC is 70% and the SOH is 90 to 100%, 80 to 90%, 70 to 80%, and less than 70%. The comparison figure which arranged the enlarged view of A part in 2 in a row is shown. In another example according to the first embodiment, a pictogram (picture) 140 is used instead of the spirit display character 40.

  The pictogram 140 is a pictorial diagram showing the weather. When the SOH of the battery 11 calculated by the SOH calculation unit 54 is 90% to 100%, the pictogram 140 is displayed as a clear mark (design) 140a that simulates the sun seen at the time of fine weather, and the SOH is 80% When it is ~ 90%, it is displayed as a cloudy mark (design) 140b which is a design resembling a cloudy sky, and when SOH is 70% to 80%, it is displayed as a rain mark (design) 140c which is a design resembling an umbrella. When the SOH is less than 70%, it is displayed as a wind mark (design) 140d which is a design resembling defoliation.

That is, by changing the design of the pictogram 140 and expressing that the weather collapses as the SOH decreases, the driver can intuitively recognize the deterioration of the SOH.
As described above, in the secondary battery system of the vehicle according to the first embodiment, the battery 11 mounted on the vehicle 1, the voltage sensor 11a for detecting the voltage of the battery 11, and the current sensor 11b for detecting the current The SOC calculation unit 52 that calculates the SOC of the battery 11 based on the voltage detected by the voltage sensor 11a and the current sensor 11b, and the SOH of the battery 11 calculated based on the voltage detected by the voltage sensor 11a and the current sensor 11b SOH calculating unit 54, the SOC calculated by the SOC calculating unit 52 and the SOC meter 27 on which the spirit display character 40 or the pictogram 140 is displayed as a pictorial picture showing the SOH calculated by the SOH calculating unit 54, and the SOC meter 27 The ECU 50 controls the SOC calculation The vertical length of the spirit display character 40 or the pictogram 140 is changed according to the SOC calculated by the unit 52, and the expression or weather of the spirit display character 40 or the pictogram 140 according to the SOH calculated by the SOH calculator 54. Change the design of and display.

  Therefore, the length in the vertical direction of the spirit display character 40 or the pictogram 140 is changed according to the SOC calculated by the SOC calculator 52, and the spirit display character 40 or the pictogram 140 according to the SOH calculated by the SOH calculator 54. Because the SOC and the SOH are displayed only by the spirit display character 40 and the pictogram 140, the visibility of the SOC can be maintained regardless of the decrease in the SOH. Further, for example, when the pictorial drawing is the pictogram 140 indicating the weather, the driver can sensibly recognize the deterioration of the battery 11 by changing it from the clear state to a mark where the weather gradually collapses as the SOH decreases. The unpleasant feeling for the replacement of the battery 11 can be eliminated.

  In particular, since the picture is a spirit display character 40 having an expression, and the design is a character expression, the driver has a sense of closeness to the spirit display character 40, and the battery is used to make the expression of the spirit display character 40 brighter. Replace 11 As a result, the driver can change the battery 11 after the user's discomfort with respect to the replacement of the battery 11 is favorably wiped away.

Second Embodiment
Hereinafter, a second embodiment will be described based on FIG.
The description of the configuration common to the first embodiment will be omitted, and only the portions different from the first embodiment will be described here.
Referring to FIG. 6, a schematic block diagram of the vehicle 1 in the second embodiment is shown. As a difference from the ECU 50 in the first embodiment, the ECU (control means) 250 in the second embodiment is provided with an SOC storage unit (SOC storage means) 256. The SOC storage unit 256 is, for example, a change history of SOC change history of the past week, change history of SOC change factors such as use of the air conditioner (charge / discharge factor) 221 and charging via the charging port (charge / discharge factor) 211. Is stored.

  Referring to FIG. 7, there is shown an enlarged view of the SOC meter (display means) 227 when the SOH is 90 to 100% in the second embodiment, that is, a portion A in FIG. 2. The SOC meter 227 in the second embodiment is different from the SOC meter 27 in the first embodiment in that a guide line 243 is provided instead of the guide line 43, and a line graph 245 and a change reason guide (charge / discharge factor guide) 247 are provided. It is further equipped.

The guide wire 243 is provided with a time axis 243 a extending rightward from the lower end. In the line graph 245, the variation history of the SOC stored by the SOC storage unit 256 is displayed with the vertical axis representing the SOC and the horizontal axis representing time. Further, among the variation history of the guide line 243, a spirit display character (picture, character) 240 is provided at a position corresponding to the position of the latest history.
The fluctuation reason guide 247 is displayed by an arrow indicating the use of the air conditioner 221 which is the fluctuation factor of the SOC stored by the SOC storage unit 256 and the charging method via the charging port 211.

  Thus, for example, the slope of line graph 245 differs between the rate of increase in SOC when performing normal charging and the rate of SOC when performing quick charging, so the effect of charging by the quick charger can be easily viewed. be able to. Further, for example, since the slope of the line graph 245 differs between the decrease rate of SOC when the air conditioner 221 is operated and the decrease rate of SOC when it is not operated, the degree of contribution to electricity cost by not operating the air conditioner 221 It can be easily viewed.

  As described above, the secondary battery system of the vehicle according to the second embodiment includes the SOC storage unit 256 that stores the SOC of the battery 11, and the SOC meter 227 displays the line graph 245, The ECU 250 forms a line graph 245 based on the change history of the SOC of the battery 11 stored by the SOC storage unit 256, and the spirit display character 240 is displayed at a position corresponding to the latest history of the line graph 245.

Therefore, it is possible to simultaneously recognize how much the battery 11 has deteriorated while visually recognizing the SOC change history.
Then, the SOC storage unit 256 further stores the air conditioner 221 and the charging port 211 which are used when the battery 11 fluctuates, and the SOC meter 27 indicates a fluctuation reason indication 247 indicating the air conditioner 221 and the charging port 211 by characters. Is further displayed, and the ECU 250 causes the variation reason guide 247 to be displayed at a position corresponding to the time when the air conditioner 221 or the charging port 211 of the line graph 245 is used.

Therefore, since the cause of the inclination of the line graph 245 can be transmitted to the driver by the change reason guide 247, for example, the driver recognizes the charging speed by the quick charger used for charging and the discharge degree by the air conditioner 221. be able to.
Although the description of the secondary battery system of the vehicle according to the present invention has been described above, the present invention is not limited to the above embodiment, and can be changed without departing from the scope of the invention.

For example, in the present embodiment, the SOC meters 27 and 227 are provided on the meter panel 23. However, they may be provided on a liquid crystal screen used in a car navigation system, as long as they can be viewed by the driver.
Also, dark blue when SOH is 100 to 90%, pale blue when SOH is 90 to 80%, yellow when SOH is 80% to 70%, red when SOH is 70% or less, and so on. The visibility may be improved by changing the color shade to.

1 Vehicle 11 Battery (Secondary Battery)
11a Voltage sensor (voltage detection means)
11b Current sensor (current detection means)
27, 227 SOC meter (display method)
40, 240 spirit display character (picture, character)
41 top 50, 250 ECU (control means)
52 SOC calculation unit (SOC calculation means)
54 SOH calculation part (SOH calculation means)
140 pictograms (drawings)
211 Charging port (charge / discharge factor)
221 Air conditioner (charge and discharge factor)
245 Line graph 247 Variation reason guidance (charging / discharging factor guidance)
256 SOC storage unit (SOC storage means)

Claims (4)

A secondary battery mounted on the vehicle,
Voltage detection means for detecting the voltage of the secondary battery;
Current detection means for detecting the current of the secondary battery;
SOC calculation means for calculating the SOC of the secondary battery based on the voltage and current detected by the voltage detection means and the current detection means;
SOH calculation means for calculating the SOH of the secondary battery based on the voltage and current detected by the voltage detection means and the current detection means;
Display means for displaying an SOC calculated by the SOC calculation means and a pictorial image indicating an SOH calculated by the SOH calculation means;
Control means for controlling the display means;
The control means changes either the length in the vertical direction or the lateral direction of the picture according to the SOC calculated by the SOC calculation means, and the picture according to the SOH calculated by the SOH calculation means. Change the design of the display and the secondary battery system of the vehicle.   The vehicle secondary battery system according to claim 1, wherein the picture is a character having an expression, and the design is the expression of the character. It has SOC storage means for storing the variation history of the SOC of the secondary battery,
The display means displays a line graph,
The control means forms the line graph based on the variation history of the SOC of the secondary battery stored by the SOC storage means,
The vehicle secondary battery system according to claim 1, wherein the pictorial diagram is displayed at a position corresponding to the latest history of the line graph. The SOC storage means further stores charge / discharge factors used when the secondary battery fluctuates,
The display means further displays charge / discharge factor guidance indicating the charge / discharge factor by characters,
The vehicle secondary battery system according to claim 3, wherein the control means causes the charge / discharge factor guidance to be displayed at a position corresponding to the time when the charge / discharge factor of the line graph is used.

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