JP6528792B2 - Vehicle battery controller - Google Patents

Description

  The present invention relates to, for example, a control device for an on-vehicle battery which suppresses deviation of deterioration in each cell in a vehicle using a lithium ion battery as a vehicle-mounted battery mounted in an engine room instead of a conventional lead battery.

  In vehicles such as automobiles, a lead battery has been used as an on-board battery for supplying power to a starter motor or the like for starting an engine. In recent years, it has been considered to use a higher output lithium ion battery as a vehicle battery instead of the lead battery.

  By the way, a lithium ion battery in which a plurality of cells are connected in series is characterized in that the output characteristic depends on the cell having the largest internal resistance value. Then, it is known that the internal resistance value of this cell is increased by, for example, an increase in impurities inside the cell when a thermal load is applied by being exposed to a high temperature environment or the like. In other words, it can be said that the cells constituting the lithium ion battery deteriorate as the heat load increases.

For this reason, when arranging a lithium ion battery in the engine room of a car, it was necessary to consider the heat load from the engine which is a heat source.
For example, in patent document 1, when arrange | positioning a lead battery and a lithium ion battery in an engine room, while making a lead battery and a lithium ion battery adjoin, it is arrange | positioned so that a lead battery may be located in the engine side. Thus, Patent Document 1 reduces the heat load from the engine, which is a heat source, to suppress the temperature rise of the lithium ion battery.

  However, even if the lithium ion battery is separated from the engine as in Patent Document 1, the temperature of the surface on the engine side of the lithium ion battery tends to rise compared to other surfaces. Therefore, in the lithium ion battery, the internal resistance value tends to increase as the cell is closer to the engine, and there is a possibility that the deterioration of each cell may be biased.

International Publication No. 2014/068896

  An object of the present invention is to provide a control device of a vehicle-mounted battery which suppresses deterioration of each cell and biases the deterioration of the life of the vehicle-mounted battery.

  The present invention is a control device for an on-vehicle battery configured of a plurality of cells connected in series and controlling an operation of an on-vehicle battery disposed in an engine room of the vehicle, and detecting internal resistance values of the respective cells. The resistance detection means, the displacement mechanism for displacing the relative position of the cell to the engine disposed in the engine room, and the cell with the smallest internal resistance value are positioned closer to the engine than the other cells And displacement control means for operating the displacement mechanism.

  The displacing mechanism may be a pivoting mechanism for integrally pivoting the plurality of cells to displace the relative position to the engine, or a feeding mechanism for sending the cells in a predetermined direction to displace the relative position to the engine be able to.

  According to the present invention, the control device of the on-vehicle battery can displace the cell with the smallest internal resistance value to a position where the thermal load is likely to be applied. In other words, the control device of the on-vehicle battery can separate the cell whose internal resistance value is higher than the cell of the smallest internal resistance value from the position to which the thermal load is easily applied.

For this reason, the control device of the on-vehicle battery can equalize the thermal load applied to each cell, that is, the progress of deterioration of each cell can be equalized.
Therefore, the control device for the on-vehicle battery can suppress the deterioration of the life of the on-vehicle battery by suppressing the bias of deterioration in each cell.

  As a mode of the present invention, the plurality of cells in the on-vehicle battery are arranged in a substantially annular shape as viewed from a predetermined direction, and the displacement mechanism rotates in a rotational direction about an axis along the predetermined direction. And a rotating mechanism configured to integrally rotate the plurality of cells.

The substantially annular shape means a substantially rectangular annular shape, a substantially polygonal annular shape, or a substantially circular annular shape as viewed from a predetermined direction.
The rotation direction may be clockwise or counterclockwise as viewed from a predetermined direction.
To integrally rotate the plurality of cells means to integrally rotate the plurality of cells by integrally rotating the plurality of cells in the inside of the on-board battery or by rotating the on-board battery.

According to the present invention, the control device of the on-vehicle battery can easily change the relative position of the cell to the engine.
Furthermore, by determining the direction of rotation clockwise or counterclockwise based on, for example, the internal resistance value of each cell, the control device of the on-vehicle battery can efficiently reduce the cell of the smallest internal resistance value at the minimum rotation angle. It can be displaced well.

  In addition, since the plurality of cells are arranged substantially annularly, the control device of the on-vehicle battery can easily arrange the displacement mechanism, for example, in the space surrounded by the plurality of cells. Thereby, the control device of the on-vehicle battery can incorporate the rotation mechanism into the on-vehicle battery while suppressing the increase in the size of the on-vehicle battery.

  Therefore, the control device of the on-vehicle battery can efficiently displace the relative position of the cell with respect to the engine by the rotation mechanism which integrally rotates the plurality of cells arranged in a substantially annular shape.

Further, as an aspect of the present invention, the resistance value detection means is configured to detect an internal resistance value of each of the cells each time a predetermined period elapses.
The predetermined time period and every has elapsed, for example, the first time every elapse from the time the engine is started time has elapsed for a predetermined time, Rugoto travel distance exceeds a predetermined distance or operating time of the engine a predetermined time elapses, it can be, and the like each time.

According to the present invention, the control device of the in-vehicle battery can more reliably suppress the decrease in the life of the in-vehicle battery.
Specifically, when the internal resistance value of the cell is always detected, the displacement mechanism operates frequently following the change in the internal resistance value, which may cause a problem in the displacement mechanism.

  Therefore, by detecting the internal resistance value of the cell when the predetermined period has elapsed, the control device of the on-vehicle battery can prevent the displacement mechanism from operating frequently following the change of the internal resistance value. . Thereby, the control device of the on-board battery can stably displace the relative position of the cell to the engine.

  Therefore, the control device of the in-vehicle battery can prevent the failure of the displacement mechanism by detecting the internal resistance value of the cell when the predetermined period has elapsed, and can more reliably suppress the reduction in the life of the in-vehicle battery. it can.

  ADVANTAGE OF THE INVENTION By this invention, the control apparatus of the vehicle-mounted battery which suppresses the bias | inclination of the deterioration in each cell, and can suppress the lifetime fall of a vehicle-mounted battery can be provided.

The top view which shows the external appearance in the vehicle front part of a vehicle by planar view. Sectional drawing which shows the internal structure of a vehicle-mounted battery in a cross section. The top view which shows each cell and a rotation mechanism part by planar view. FIG. 2 is a block diagram showing a configuration of a battery control device. Explanatory drawing explaining the position of each cell, and a rotation direction. 6 is a flowchart showing the operation of the battery control device. The flowchart which shows operation of resistance value acquisition processing. The flowchart which shows the operation of cell displacement processing. Explanatory drawing explaining the position of each cell after cell displacement processing. 10 is a flowchart showing an operation of cell displacement processing in the second embodiment. Explanatory drawing explaining the position of each cell in Example 2, and a rotation direction.

  An embodiment of the invention will now be described in conjunction with the drawings.

  1 shows a plan view of the appearance of the front portion 1 of the vehicle, FIG. 2 shows a sectional view of the internal configuration of the on-vehicle battery 7, and FIG. 3 shows a plan view of each cell 71 and the rotation mechanism 76. FIG. 4 shows a block diagram of the battery control device 70, and FIG. 5 shows an explanatory view for explaining the position of each cell 71 and the rotational direction R1.

  Further, in FIG. 1, arrows Fr and Rr indicate the longitudinal direction of the vehicle, arrow Fr indicates the front of the vehicle, and arrow Rr indicates the rear of the vehicle. Furthermore, arrows Rh and Lh indicate the vehicle width direction, arrow Rh indicates the vehicle right direction, and arrow Lh indicates the vehicle left direction.

  The vehicle front portion 1 of the vehicle is, as shown in FIG. 1, a lower portion of a dash panel 3 constituting a compartment (not shown) in which an occupant gets in between a pair of left and right front fenders 2 constituting a design surface of the vehicle. A pair of left and right front side frames 4 extending forward from the vehicle, a pair of left and right crush cans 5 provided at the front end of the front side frame 4, and bumper reinforcement 6 connecting the tip of crush can 5 in the vehicle width direction And consists of. In addition, let the space enclosed with these in the vehicle front part 1 be the engine room S.

In the engine room S, as shown in FIG. 1, the engine E is disposed on the right side of the vehicle, and the transmission T connected to the engine E is disposed on the right side of the vehicle. Furthermore, in the engine room S, an on-vehicle battery 7 is disposed above the vehicle of the transmission T and on the vehicle rear side.
In addition, as shown in FIG. 2, a battery tray 8 on which the on-vehicle battery 7 is mounted and fixed is fixed to the side surface on the inner side in the vehicle width direction on the front side frame 4 on the left side of the vehicle.

Further, the on-vehicle battery 7 is mounted on the battery tray 8 so that a specific side surface is located on the right side of the vehicle, that is, faces the engine E side. The on-vehicle battery 7 is a lithium ion secondary battery, and as shown in FIG. 3, has the same output characteristics and is constituted by four cells 71 connected in series.
As shown in FIGS. 2 and 3, this cell 71 is a cube of a substantially rectangular shape in a plan view, and has unique identification information.

  Then, as shown in FIG. 3, the four cells 71 make the surface of the cell 71 on the short side in plan view contact the surface of the adjacent cell 71 on the long side in plan view, It is arrange | positioned in planar view substantially rectangular annular shape which has space in the center. The four cells 71 are bundled by a fixing band 72 wound around the outer periphery thereof.

The battery control device 70 in the on-vehicle battery 7 will be described in detail with reference to FIGS. 2 to 5.
As shown in FIG. 4, the battery control device 70 electrically connects the battery module 73 including the four cells 71 described above, the voltage / current sensor 74, the battery temperature sensor 75, the rotation mechanism 76, and the like. It comprises the displacement control unit 77 connected.

  Here, as shown in FIG. 4, among the four cells 71 constituting the battery module 73, the cell 71 at one end side connected in series is a cell 71 connected to the first cell 71 a as the first cell 71 a. Is a second cell 71b and a cell connected to the second cell 71b is a third cell 71c, and a cell 71 connected to the third cell 71c is a fourth cell 71d.

  Then, as shown in FIG. 5, the battery module 73 is provided with a rotation mechanism 76 described later so that the surface on the long side in plan view and the right side surface which is a specific side surface of the on-vehicle battery 7 face each other. The first cell 71a is mounted on the rotary pedestal 766, and the second cell 71b, the third cell 71c, and the fourth cell 71d are mounted on the rotary pedestal 766 in this order clockwise in plan view.

  The voltage / current sensor 74 is a sensor electrically connected to each cell 71, and has a function of detecting the voltage and current of each cell 71, a detected voltage and current, and a voltage signal and current respectively. It has a function of outputting to the displacement control unit 77 as a signal.

  Further, the battery temperature sensor 75 is a sensor mounted at an appropriate position of the battery module 73, and outputs a function of detecting the temperature of the battery module 73 and the detected temperature to the displacement control unit 77 as a battery temperature signal. It has a function.

  Further, as shown in FIGS. 2 and 3, the rotation mechanism 76 is a mechanism built in the on-vehicle battery 7, and the four cells 71 can be integrally rotated with the vehicle vertical direction as a rotation axis. It is configured.

  Specifically, as shown in FIGS. 2 and 3, the rotation mechanism 76 is engaged with a fixed gear body 762 integrally provided on a fixed pedestal 761 forming the bottom of the on-vehicle battery 7 and a fixed gear body 762. A driven gear 763, a drive motor 764 for rotating the driven gear 763, a thrust roller bearing 765 mounted on the upper surface of the fixed base 761 of the on-vehicle battery 7, and four cells 71 are mounted. A rotation base 766, a driven gear 763, and a holding case 767 for housing and holding the drive motor 764 are provided.

As shown in FIG. 2 and FIG. 3, the fixed gear body 762 is a large diameter gear provided at the upper end of the shaft portion 762a with a shaft portion 762a standing upright toward the upper side of the vehicle at substantially the center of the fixed pedestal 761 It is integrally formed with 762b.
As shown in FIG. 2, the driven gear 763 is rotatably supported by the holding case 767 with the vertical axis of the vehicle as a rotation axis, and is formed in a shape having gears at the upper and lower ends.

  More specifically, as shown in FIGS. 2 and 3, the driven gear 763 has a smaller diameter than the large diameter gear 762b of the fixed gear 762 and a small diameter gear 763a meshing with the large diameter gear 762b of the fixed gear. The large diameter gear 763 b having a diameter larger than that of the small diameter gear 763 a is coaxially arranged in this order from the lower side of the vehicle and integrally formed.

  The drive motor 764 is an electric motor driven by the power from the battery module 73, and as shown in FIG. Furthermore, as shown in FIGS. 2 and 3, the drive motor 764 is provided integrally with the tip of the output shaft so as to be rotatable integrally, and includes a drive gear 764 a meshing with the large diameter gear 763 b of the driven gear 763. There is. The drive gear 764a is smaller in diameter than the large diameter gear 763b of the driven gear 763.

  As shown in FIG. 2, the rotary pedestal 766 is mounted on the upper surface of the thrust roller bearing 765 and configured to be rotatable relative to the fixed pedestal 761. As shown in FIGS. 2 and 3, this rotary pedestal 766 is a flat plate having a size capable of mounting four cells 71 arranged in a substantially annular shape in a plan view, and a radial ball bearing 768 is provided substantially at the center. The outer ring is press-fitted and fixed. The shaft portion 762 a of the fixed gear body 762 is press-fitted to the inner ring of the radial ball bearing 768.

  As shown in FIG. 2, the holding case 767 has a substantially box shape with the lower side of the vehicle open, and is formed into a substantially box shape by pressing a metal flat plate punched into a developed shape, for example. Inside this holding case 767, as shown in FIG. 2, a bracket for holding the driven gear 763, a bracket for holding the drive motor 764, and a bracket for holding the displacement control unit 77 are respectively joined.

  Further, as shown in FIGS. 2 and 3, the holding case 767 has a rotary pedestal 766 so as to cover the fixed gear body 762 with the opening side facing the vehicle lower side in the space formed by the four cells 71. It is fixed to the top of the

  Since the large diameter gear 762 b of the fixed gear body 762 is integrally formed on the fixed pedestal 761 in the rotation mechanism portion 76 having such a configuration, the shaft portion 762 a of the fixed gear body 762 is rotationally driven by the drive motor 764. The rotation pedestal 766 is rotated about the rotation axis. At this time, the rotational speed of the rotating pedestal 766 is rotated at a lower rotational speed than the rotational speed of the output shaft of the drive motor 764.

  In the on-vehicle battery 7 in the present embodiment, as shown in FIG. 5, the position of the rotation pedestal 766 where the cell 71 facing the right side surface of the on-vehicle battery 7 is disposed is a first position P1. In other words, the on-vehicle battery 7 is close to the engine E, and the position where the cell 71 whose surface on the long side in plan view faces the engine E is set as a first position P1.

  Then, with respect to the cells 71 placed at the first position P1, the positions of the rotary pedestal 766 where the cells 71 adjacent in a clockwise view in plan view are arranged are referred to as a second position P2 and a third position P3. , And the fourth position P4.

  Further, as shown in FIGS. 2 and 4, the displacement control unit 77 is a control unit held and fixed inside the holding case 767, and drives the battery temperature sensor 75, the voltage current sensor 74, and the rotation mechanism 76. It is electrically connected to a motor 764 and an electronic control unit (hereinafter referred to as “ECU”) 9 that controls the operation of the engine E. The displacement control unit 77 operates by receiving the supply of power from the battery module 73.

As shown in FIG. 4, the displacement control unit 77 includes a storage unit 771 that stores various information, and a control unit 772 that controls the operation of each unit.
The storage unit 771 is configured of, for example, a non-volatile memory, and has a function of writing and storing various information and a function of reading various information. The storage unit 771 stores position information indicating the position of each cell 71 and operation time information indicating the operation time of the engine E acquired from the ECU 9.

  In the position information, the information indicating the first position P1 in the on-vehicle battery 7 described above and the identification information of the cell 71 located at the first position P1 are registered in association with each other. Similarly, in the position information, information indicating the second position P2 and identification information of the cell 71 located at the second position P2 are registered in association with each other, and information indicating the third position P3 and the third position The identification information of the cell 71 located at P3 is registered in association with each other, and the information indicating the fourth position P4 and the identification information of the cell 71 located at the fourth position P4 are registered in association with each other.

  The control unit 772 has a function of acquiring information indicating the operating time of the engine E output by the ECU 9, a function of acquiring identification information of each cell 71, and a battery module based on the battery temperature signal output by the battery temperature sensor 75. The function of acquiring the temperature of 73, the function of acquiring the voltage value and current value of each cell 71 based on the voltage signal of the voltage / current sensor 74, and the current signal, and the function of controlling the rotation of the drive motor 764 Have.

Next, the operation of the battery control device 70 configured as described above will be described in detail with reference to FIGS. 6 to 8.
6 shows a flow chart of the operation in the battery control device 70, FIG. 7 shows a flow chart of the operation in resistance value acquisition processing, FIG. 8 shows a flow chart of the operation in cell displacement processing, and FIG. The explanatory view explaining the position of each cell 71 of is shown.

  9 (a) shows the position of each cell 71 after 90 ° rotation processing, FIG. 9 (b) shows the position of each cell 71 after 180 ° rotation processing, and FIG. 9 (c) is 270 ° The position of each cell 71 after the rotation process is shown.

  First, when the displacement control unit 77 and the battery module 73 are brought into conduction for the first time, the control unit 772 of the displacement control unit 77 reads individual identification information in order from the first cell 71a. After that, the control unit 772 associates the identification information of the first cell 71a placed at the first position P1 with the information indicating the first position P1, and stores the information in the storage unit 771 as position information.

  Similarly, the control unit 772 associates the identification information of the second cell 71b with the information indicating the second position P2, associates the identification information of the third cell 71c with the information indicating the third position P3, and the fourth cell 71d. Is associated with information indicating the fourth position P4, and is stored in the storage unit 771 as position information.

Then, as shown in FIG. 6, the control unit 772 of the displacement control unit 77 starts the process at predetermined time intervals regardless of whether or not the engine E is started by the operation of the occupant, and stores the process in the storage unit 771. Based on the stored operating time information, it is determined whether the operating time of the engine E is a predetermined time or more (step S101).
If the operating time of the engine E is less than the predetermined time (step S101: No), the control unit 772 resumes the process of step S101 after a predetermined period of time elapses after the process is completed.

  On the other hand, when the engine operating time is equal to or longer than the predetermined time (step S101: Yes), the controller 772 starts the voltage / current monitoring start process (step S102). Specifically, the control unit 772 acquires a voltage signal and a current signal from the voltage / current sensor 74, and monitors the voltage drop of each cell 71 and the output current. Thereafter, the control unit 772 starts resistance value acquisition processing for acquiring the internal resistance value of each cell 71 (step S103).

  When the resistance value acquisition process is started, as shown in FIG. 7, the control unit 772 determines whether the battery temperature is within a predetermined temperature range suitable for acquiring the resistance value (step S111). In addition, as a predetermined temperature range suitable for acquisition of resistance value, it is a range which is not extremely low temperature, or a range which is not extremely high temperature, and preferably is a range of normal temperature.

If the battery temperature is not within the predetermined temperature range (step S111: No), the control unit 772 determines that the conditions are not suitable for obtaining the resistance value, and ends the resistance value obtaining process, and the process is performed. It returns to step S103 of 6.
On the other hand, if the battery temperature is within the predetermined temperature range (step S111: Yes), the control unit 772 determines whether the start button for starting the engine E is pressed by the operation of the occupant (step S112).

  When the start button is pressed (step S112: Yes), the control unit 772 causes the output current acquired via the voltage / current sensor 74 to be a current within the large current range indicating the range of the large current output in a short time It is determined whether it is a value (step S113). The large current range in step S113 is a large current which is output in a short time when the engine E is started, and is, for example, in the range of 700 to 800A.

  If the output current is a current value within the large current range (step S113: Yes), the controller 772 starts resistance value calculation processing (step S114), and based on the acquired voltage drop and the output current, The internal resistance value of each cell 71 is calculated. Thereafter, the control unit 772 associates the calculated internal resistance value of the cell 71 and the identification information of the cell 71 and temporarily stores the same in the storage unit 771, and then ends the resistance value acquisition process, and the process of FIG. It returns to S103.

  If the start button is not pressed in step S112 in FIG. 7 (step S112: No), the control unit 772 determines whether the current state of the vehicle is traveling (step S115).

  When the vehicle is traveling (step S115: Yes), the control unit 772 sets the output current acquired via the voltage / current sensor 74 to a medium current range, which indicates a medium current range to be output during traveling. It is determined whether or not the current value is (step S116). The medium current range is a range of medium current values continuously output to the auxiliary machinery etc. during traveling, for example, a range of several tens of amps.

  If the output current is a current value within the medium current range (step S116: Yes), the controller 772 starts resistance value calculation processing (step S117), and based on the acquired voltage drop and the output current The internal resistance value of each cell 71 is calculated. Thereafter, the control unit 772 associates the calculated internal resistance value of the cell 71 and the identification information of the cell 71 and temporarily stores the same in the storage unit 771, and then ends the resistance value acquisition process, and the process of FIG. It returns to S103.

  When the vehicle is not traveling in step S115 of FIG. 7 (step S115: No), the control unit 772 determines that the engine E is in the stopped state, and the output obtained through the voltage / current sensor 74 It is determined whether the current is a current value within the dark current range indicating the range of dark current output during engine stop (step S118). The dark current range is a range of small current values flowing to hold various information stored in the ECU 9 or the like even when the engine E is stopped, and is, for example, a range of several tens of mA.

  If the output current is a current value within the dark current range (step S118: Yes), the controller 772 starts resistance value calculation processing (step S119), and based on the acquired voltage drop and the output current, The internal resistance value of each cell 71 is calculated. Thereafter, the control unit 772 associates the calculated internal resistance value of the cell 71 and the identification information of the cell 71 and temporarily stores the same in the storage unit 771, and then ends the resistance value acquisition process, and the process of FIG. It returns to S103.

  If the output current is not a current value within the large current range in step S113 in FIG. 7 (step S113: No), if the output current is not a current value in the middle current range in step S116 in FIG. When the output current is not a current value within the dark current range in step S118 of FIG. 7 (step S118: No) (step S118: No), the control unit 772 ends the resistance value acquisition process and the process of FIG. It returns to step S103.

  Returning to step S103 of FIG. 6, when the resistance value acquisition process is completed, the control unit 772 determines whether the internal resistance value of each cell 71 has been acquired (step S104). When the internal resistance value of each cell 71 is not acquired (step S104: No), the control unit 772 returns the process to step S103 to acquire the internal resistance value of each cell 71.

On the other hand, when the internal resistance value of each cell 71 is acquired (step S104: Yes), the control unit 772 starts the cell displacement process (step S105).
When the cell displacement process is started, the control unit 772 calculates the number of cells of the minimum resistance value based on the internal resistance value of each cell 71 temporarily stored in the storage unit 771, as shown in FIG. 8 (step S121). .

  At this time, the control unit 772 sets, for example, an error allowable range of the internal resistance value to 10%, and a value obtained by adding an error of 10% to the smallest internal resistance value among the internal resistance values of each cell 71 as the minimum resistance value. The number of cells with an internal resistance value below this minimum resistance value is calculated.

  Thereafter, the control unit 772 determines whether the number of cells of the minimum resistance value is 4 or not (step S122). If the number of cells of the minimum resistance value is 4 (step S122: Yes), the control unit 772 Assuming that each cell 71 including the cell 71 located at the first position P1 susceptible to the thermal load of the engine E has no bias in deterioration, the cell displacement process is ended, and the process returns to step S105 in FIG.

On the other hand, when the number of cells of the minimum resistance value is not four (step S122: No), the control unit 772 determines whether the number of cells of the minimum resistance value is three or not (step S123).
When the number of cells of the minimum resistance value is 3 (step S123: Yes), the control unit 772 determines that the cells 71 other than the cell 71 located at the first position P1 are the cells 71 of the minimum resistance value. The rotation pedestal 766 is rotated 90 degrees clockwise in plan view to start the 90 ° rotation processing (step S124).

  When the 90 ° rotation process is started, the drive motor 764 rotates the rotation base 766 by 90 ° in the clockwise direction R1 in plan view according to the instruction of the control unit 772 as shown in FIG. The cell 71 located at is displaced so as to be located at the first position P1.

  Then, the control unit 772 is associated with the information indicating the first position P1 in the position information, the information indicating the second position P2, the information indicating the third position P3, and the information indicating the fourth position P4. The identification information of the cell 71 is rewritten and stored in the storage unit 771 as new position information.

  For example, as shown in FIG. 9A, the rotation pedestal 766 is rotated by 90 ° in the rotation direction R1 clockwise in plan view from the initial state (see FIG. 5) in which the first cell 71a is positioned at the first position P1. As described above, the fourth cell 71d positioned at the fourth position P4 is displaced to the first position P1 so that the surface of the fourth cell 71d on the long side in plan view faces the engine E side.

  Then, the control unit 772 changes the identification information associated with the information indicating the first position P1 in the position information into the identification information of the fourth cell 71d, and stores the identification information as new position information in the storage unit 771.

  Similarly, the control unit 772 changes the identification information associated with the information indicating the second position P2 in the position information to the identification information of the first cell 71a, and the identification associated with the information indicating the third position P3. The information is changed to the identification information of the second cell 71b, the identification information associated with the information indicating the fourth position P4 is changed to the identification information of the third cell 71c, and stored in the storage unit 771 as new position information. .

  In this manner, when the cell 71 of the minimum resistance value is disposed at the first position P1 that is easily subjected to the thermal load of the engine E, the control unit 772 ends the cell displacement process, and the process of FIG. Return to S105.

When the number of cells of the minimum resistance value is not three in step S123 of FIG. 8 (step S123: No), the control unit 772 determines whether the number of cells of the minimum resistance value is two (step S125).
If the number of cells with the minimum resistance value is two (step S125: Yes), the control unit 772 reads the position information of the storage unit 771 and the cell with the cell 71 with the minimum resistance value is located at the fourth position P4. It is determined based on the position information whether or not 71 is included (step S126).

  If the cell 71 having the minimum resistance value includes the cell 71 located at the fourth position P4 (step S126: Yes), the control unit 772 determines that the cell 71 located at least at the fourth position P4 has a minimum resistance value. The process advances to step S124 to start the 90.degree. Rotation process. Thereafter, after storing the new position information in the storage unit 771, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  On the other hand, when the cell 71 of the minimum resistance value does not include the cell 71 located at the fourth position P4 in step S126 of FIG. 8 (step S126: No), the control unit 772 selects the second position P2, Alternatively, the cell 71 located at the third position P3 is determined to be the cell of the minimum resistance value, and the 180 ° rotation process is started to rotate the rotation pedestal 766 180 ° clockwise in plan view (step S127).

  When the 180 ° rotation process is started, the drive motor 764 rotates the rotation base 766 by 180 ° in the clockwise direction R1 in plan view according to the instruction of the control unit 772 as shown in FIG. The cell 71 located at is displaced so as to be located at the first position P1.

  Then, the control unit 772 is associated with the information indicating the first position P1 in the position information, the information indicating the second position P2, the information indicating the third position P3, and the information indicating the fourth position P4. The identification information of the cell 71 is rewritten and stored in the storage unit 771 as new position information.

  For example, as shown in FIG. 9B, the rotation pedestal 766 is rotated by 180 ° in the rotation direction R1 clockwise in plan view from the initial state (see FIG. 5) in which the first cell 71a is positioned at the first position P1. As described above, the third cell 71c located at the third position P3 is displaced to the first position P1 so that the surface of the third cell 71c on the long side in plan view faces the engine E side.

  Then, the control unit 772 changes the identification information associated with the information indicating the first position P1 in the position information to the identification information of the third cell 71c, and stores the identification information as new position information in the storage unit 771.

  Similarly, the control unit 772 changes the identification information associated with the information indicating the second position P2 in the position information to the identification information of the fourth cell 71d, and the identification associated with the information indicating the third position P3. The information is changed to the identification information of the first cell 71a, the identification information associated with the information indicating the fourth position P4 is changed to the identification information of the second cell 71b, and stored in the storage unit 771 as new position information. .

  In this manner, when the cell 71 of the minimum resistance value is disposed at the first position P1 that is easily subjected to the thermal load of the engine E, the control unit 772 ends the cell displacement process, and the process of FIG. Return to S105.

  When the number of cells of the minimum resistance value is not two in step S125 of FIG. 8 (step S125: No), the control unit 772 determines that the number of cells of the minimum resistance value is one, and the position of the storage unit 771. Based on the information, it is determined whether the cell of the minimum resistance value is the cell 71 located at the fourth position P4 (step S128).

  When the cell 71 having the minimum resistance value is located at the fourth position P4 (step S128: Yes), the control unit 772 rotates the rotation pedestal 766 90 degrees clockwise as viewed in plan view. It starts (step S129). Since this 90 ° rotation process is the same process as the 90 ° rotation process of step S124 described above, the detailed description thereof is omitted. Thereafter, after storing the new position information in the storage unit 771, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  On the other hand, when the cell of the minimum resistance value is not the cell 71 located at the fourth position P4 in step S128 of FIG. 8 (step S128: No), the control unit 772 determines the minimum based on the position information of the storage unit 771. It is determined whether the cell having the resistance value is the cell 71 located at the third position P3 (step S130).

  In the case of the cell 71 in which the cell of the minimum resistance value is located at the third position P3 (step S130: Yes), the control unit 772 starts the 180 ° rotation process to rotate the rotating pedestal 766 180 ° clockwise in plan view. (Step S131). The 180 ° rotation process is the same process as the 180 ° rotation process of step S127 described above, and thus the detailed description thereof is omitted. Thereafter, after storing the new position information in the storage unit 771, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  Further, in step S130 of FIG. 8, when the cell of the minimum resistance value is not the cell 71 located at the third position P3 (step S130: No), the control unit 772 determines the minimum based on the position information of the storage unit 771. It is determined whether the cell of resistance value is the cell 71 located at the second position P2 (step S132).

  In the case of the cell 71 in which the cell of the minimum resistance value is located at the second position P2 (step S132: Yes), the control unit 772 starts the 270 ° rotation process of rotating the rotating pedestal 766 270 ° clockwise in plan view. (Step S133).

  When the 270 ° rotation process is started, the drive motor 764 rotates the rotation base 766 by 270 ° in the clockwise direction R1 in plan view according to the instruction of the control unit 772 as shown in FIG. The cell 71 located at is displaced so as to be located at the first position P1.

  Then, the control unit 772 is associated with the information indicating the first position P1 in the position information, the information indicating the second position P2, the information indicating the third position P3, and the information indicating the fourth position P4. The identification information of the cell 71 is rewritten and stored in the storage unit 771 as new position information.

  For example, as shown in FIG. 9C, the rotation pedestal 766 is rotated by 270 ° in the rotation direction R1 clockwise in plan view from the initial state (see FIG. 5) in which the first cell 71a is positioned at the first position P1. As described above, the second cell 71b located at the second position P2 is displaced to the first position P1 so that the surface of the second cell 71b on the long side in plan view faces the engine E side.

  Then, the control unit 772 changes the identification information associated with the information indicating the first position P1 in the position information into the identification information of the second cell 71b, and stores the identification information as new position information in the storage unit 771.

  Similarly, the control unit 772 changes the identification information associated with the information indicating the second position P2 in the position information to the identification information of the third cell 71c, and the identification associated with the information indicating the third position P3. The information is changed to the identification information of the fourth cell 71d, the identification information associated with the information indicating the fourth position P4 is changed to the identification information of the first cell 71a, and stored in the storage unit 771 as new position information. .

  In this manner, when the cell 71 of the minimum resistance value is disposed at the first position P1 that is easily subjected to the thermal load of the engine E, the control unit 772 ends the cell displacement process, and the process of FIG. Return to S105.

  On the other hand, when the cell having the minimum resistance value is not the cell 71 located at the second position P2 in step S132 in FIG. 8 (step S132: No), the controller 772 determines that the cell 71 located at the first position P1 is After determining that the cell is the cell of the minimum resistance value and ending the cell displacement process, the process returns to step S105 of FIG.

Returning to step S105 in FIG. 6, when the cell displacement process is completed, the control unit 772 starts the voltage / current monitoring stop process (step S106), and stops monitoring the voltage drop of each cell 71 and the output current.
Thereafter, the control unit 772 resumes the process of step S101 after a predetermined period of time elapses after the process ends.

  The battery control device 70 that realizes the operation as described above can displace the cell 71 of the minimum resistance value to a position where the thermal load is easily applied. In other words, the battery control device 70 can separate the cell 71 having an internal resistance value higher than that of the cell 71 having the minimum resistance value from a position to which a thermal load is easily applied.

Therefore, the battery control device 70 can equalize the heat load applied to each cell 71, that is, can uniform the progress of deterioration of each cell 71.
Therefore, the battery control device 70 can suppress the bias of the deterioration in each of the cells 71 and can suppress the decrease in the life of the on-vehicle battery 7.

  In addition, the battery control device 70 is provided with the rotation mechanism unit 76 that integrally rotates the four cells 71 arranged in an annular shape substantially rectangular in plan view in the rotation direction R1 with the vehicle vertical direction as the rotation axis. Can easily change the relative position of the cell 71 to the engine E.

  Furthermore, since the four cells 71 are arranged in a ring shape having a substantially rectangular shape in plan view, the battery control device 70 easily arranges part of the rotation mechanism 76 in the space surrounded by the four cells 71. be able to. Thus, the battery control device 70 can incorporate the rotation mechanism 76 into the on-vehicle battery 7 while suppressing the increase in size of the on-vehicle battery 7.

  Therefore, the battery control device 70 can efficiently displace the relative position of the cell 71 to the engine E by means of the rotation mechanism 76 that integrally rotates the four cells 71 arranged in a ring shape substantially rectangular in plan view. .

Further, when the operation time of the engine E is equal to or longer than the predetermined time, the battery control device 70 can more reliably suppress the decrease in the life of the in-vehicle battery 7 by detecting the internal resistance value of each cell 71. it can.
Specifically, when the internal resistance value of the cell 71 is constantly detected, the rotation mechanism 76 frequently operates following the change in the internal resistance, which may cause a problem in the rotation mechanism 76. There is.

  Therefore, when the operating time of the engine E is equal to or longer than the predetermined time, the battery control device 70 detects the internal resistance value of the cell 71, and the rotation control unit 76 frequently follows the change in the internal resistance value. Can be prevented from operating. Thus, the battery control device 70 can stably displace the relative position of the cell 71 to the engine E.

  Therefore, the battery control device 70 detects the internal resistance value of the cell 71 when the operation time of the engine E is equal to or longer than the predetermined time, thereby preventing the failure of the rotation mechanism 76 and reducing the life of the in-vehicle battery 7 Can be suppressed more reliably.

Next, Example 2 in which the operation of the cell displacement processing in Example 1 described above is different will be described in detail using FIGS. 10 and 11.
More specifically, according to Example 1 in which the rotation pedestal 766 is rotated in the rotation direction R1 clockwise in plan view according to the position of the cell with the minimum resistance value or the cell number with the minimum resistance value, In the second embodiment, the rotation base is rotated in the clockwise rotation direction R1 in plan view or in the counterclockwise rotation direction R2 in plan view depending on the position of the cell number of the minimum resistance value or the cell 71 of the minimum resistance value. The difference is that the 766 is rotated.

10 shows a flowchart of cell displacement processing in the second embodiment, and FIG. 11 shows an explanatory view for explaining the position of each cell 71 in the second embodiment and the rotational directions R1 and R2.
The same components as those in the first embodiment described above are denoted by the same reference numerals, and the detailed description thereof will be omitted.

First, when the internal resistance value of each cell 71 is acquired in step S104 of FIG. 6 in the first embodiment described above (step S104: Yes), the control unit 772 starts the cell displacement process (step S105).
When the cell displacement process is started, as shown in FIG. 10, the control unit 772 calculates the number of cells of the minimum resistance value based on the internal resistance value of each cell 71 temporarily stored in the storage unit 771 (step S221). .

  At this time, the control unit 772 sets, for example, an error allowable range of the internal resistance value to 10%, and a value obtained by adding an error of 10% to the smallest internal resistance value among the internal resistance values of each cell 71 as the minimum resistance value. The number of cells with an internal resistance value below this minimum resistance value is calculated.

  Thereafter, the control unit 772 determines whether the number of cells of the minimum resistance value is 4 or not (step S222). If the number of cells of the minimum resistance value is 4 (step S222: Yes), the control unit 772 Assuming that each cell 71 including the cell 71 located at the first position P1 susceptible to the thermal load of the engine E has no bias in deterioration, the cell displacement process is ended, and the process returns to step S105 in FIG.

On the other hand, when the number of cells of the minimum resistance value is not four (step S222: No), the control unit 772 determines whether the number of cells of the minimum resistance value is three or not (step S223).
When the number of cells of the minimum resistance value is 3 (step S223: Yes), the control unit 772 determines that the cells 71 other than the cell 71 located at the first position P1 are the cells 71 of the minimum resistance value. Then, a 90.degree. Forward rotation process is started to rotate the rotary pedestal 766 90.degree. Clockwise in plan view (step S224).

  When the 90.degree. Forward rotation process is started, the drive motor 764 rotates the rotation base 766 by 90.degree. In the clockwise rotation direction R1 in plan view as shown in FIG. The cell 71 located at P4 is displaced so as to be located at the first position P1.

  Then, the control unit 772 is associated with the information indicating the first position P1 in the position information, the information indicating the second position P2, the information indicating the third position P3, and the information indicating the fourth position P4. The identification information of the cell 71 is rewritten and stored in the storage unit 771 as new position information.

  In this manner, when the cell 71 of the minimum resistance value is disposed at the first position P1 that is easily subjected to the thermal load of the engine E, the control unit 772 ends the cell displacement process, and the process of FIG. Return to S105.

When the number of cells of the minimum resistance value is not three in step S223 of FIG. 10 (step S223: No), the control unit 772 determines whether the number of cells of the minimum resistance value is two (step S225).
When the number of cells of the minimum resistance value is 2 (step S225: Yes), the control unit 772 reads the position information of the storage unit 771, and the cell with the cell 71 of the minimum resistance value is located at the fourth position P4. It is determined based on the position information whether or not 71 is included (step S226).

  When the cell 71 of the minimum resistance value includes the cell 71 located at the fourth position P4 (step S226: Yes), the control unit 772 determines the minimum resistance value of the cell 71 located at least at the fourth position P4. The process proceeds to step S224 to start the 90.degree. Normal rotation process. Thereafter, after storing the new position information in the storage unit 771, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  On the other hand, when the cell 71 of the minimum resistance value does not include the cell 71 located at the fourth position P4 in step S226 of FIG. 10 (step S226: No), the control unit 772 selects the second position P2, Alternatively, the cell 71 located at the third position P3 is determined to be the cell having the minimum resistance value, and the position information indicates whether the cell 71 having the minimum resistance value includes the cell 71 located at the second position P2. It determines based on (step S227).

  When the cell 71 of the minimum resistance value includes the cell 71 located at the second position P2 (step S227: Yes), the control unit 772 determines that the cell 71 located at least at the second position P2 has a minimum resistance value. The rotation pedestal 766 is determined to be a cell of 90 °, and a 90 ° reverse process is started to rotate the rotation pedestal 766 90 ° counterclockwise in plan view (step S 228).

  When 90 ° reverse rotation processing is started, the drive motor 764 rotates the rotation base 766 by 90 ° in the counterclockwise rotation direction R2 in plan view according to the instruction of the control unit 772 as shown in FIG. The cell 71 located at P2 is displaced so as to be located at the first position P1.

  Then, the control unit 772 is associated with the information indicating the first position P1 in the position information, the information indicating the second position P2, the information indicating the third position P3, and the information indicating the fourth position P4. The identification information of the cell 71 is rewritten and stored in the storage unit 771 as new position information. Thereafter, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  On the other hand, when the cell 71 of the minimum resistance value does not include the cell 71 located at the second position P2 in Step S227 of FIG. 10 (Step S227: No), the control unit 772 sets the third position P3. It is determined that the cell 71 located is a cell of the minimum resistance value, and a 180 ° rotation process is started to rotate the rotating pedestal 766 180 ° clockwise in plan view (step S229).

  When the 180 ° rotation process is started, the drive motor 764 rotates the rotation base 766 by 180 ° in the clockwise direction R1 in plan view according to the instruction of the control unit 772 as shown in FIG. The cell 71 located at is displaced so as to be located at the first position P1.

  Then, the control unit 772 is associated with the information indicating the first position P1 in the position information, the information indicating the second position P2, the information indicating the third position P3, and the information indicating the fourth position P4. The identification information of the cell 71 is rewritten and stored in the storage unit 771 as new position information. Thereafter, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  When the number of cells of the minimum resistance value is not two in step S225 of FIG. 10 (step S225: No), the control unit 772 determines that the number of cells of the minimum resistance value is one, and the position of the storage unit 771. Based on the information, it is determined whether the cell of the minimum resistance value is the cell 71 located at the fourth position P4 (step S230).

  When the cell 71 having the minimum resistance value is located at the fourth position P4 (step S230: Yes), the control unit 772 rotates the rotating pedestal 766 90 ° clockwise in plan view, 90 ° normal rotation processing Is started (step S231). The 90.degree. Normal rotation process is the same process as the 90.degree. Normal rotation process of step S224 described above, and thus the detailed description thereof will be omitted. Thereafter, after storing the new position information in the storage unit 771, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  On the other hand, when the cell of the minimum resistance value is not the cell 71 located at the fourth position P4 in step S230 of FIG. 8 (step S230: No), the control unit 772 determines the minimum based on the position information of the storage unit 771. It is determined whether the cell of resistance value is the cell 71 located at the third position P3 (step S232).

  In the case of the cell 71 in which the cell of the minimum resistance value is located at the third position P3 (step S232: Yes), the control unit 772 starts the 180 ° rotation process to rotate the rotating pedestal 766 180 ° clockwise in plan view. (Step S233). The 180 ° rotation process is the same process as the 180 ° rotation process of step S 229 described above, and thus the detailed description thereof is omitted. Thereafter, after storing the new position information in the storage unit 771, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  When the cell having the minimum resistance value is not the cell 71 located at the third position P3 in step S232 in FIG. 8 (step S232: No), the control unit 772 performs the minimum based on the position information of the storage unit 771. It is determined whether the cell of resistance value is the cell 71 located at the second position P2 (step S234).

  In the case of the cell 71 in which the cell of the minimum resistance value is located at the second position P2 (step S234: Yes), the control unit 772 starts 90.degree. Reverse processing to rotate the rotating pedestal 766 90.degree. (Step S235). The 90 ° reverse process is the same process as the 90 ° reverse process in step S228 described above, and thus the detailed description thereof is omitted. Thereafter, after storing the new position information in the storage unit 771, the control unit 772 ends the cell displacement process, and returns the process to step S105 in FIG.

  On the other hand, when the cell of the minimum resistance value is not the cell 71 located at the second position P2 in step S234 of FIG. 10 (step S234: No), the control unit 772 determines that the cell 71 located at the first position P1 is After determining that the cell is the cell of the minimum resistance value and ending the cell displacement process, the process returns to step S105 of FIG.

Returning to step S105 in FIG. 6, when the cell displacement process is completed, the control unit 772 starts the voltage / current monitoring stop process (step S106), and stops monitoring the voltage drop of each cell 71 and the output current.
Thereafter, the control unit 772 resumes the process of step S101 after a predetermined period of time elapses after the process ends.

The battery control device 70 according to the second embodiment that realizes the above-described operation can suppress the deterioration of the in-vehicle battery 7 and prevent the deterioration of the on-board battery 7 as in the first embodiment. .
Furthermore, the battery control device can be obtained by rotating the rotary base 766 clockwise in plan view or counterclockwise in plan view depending on the position of the cell with the minimum resistance value or the cell 71 with the minimum resistance value. 70 can efficiently displace the cell 71 of the minimum resistance value at the minimum rotation angle.

In correspondence with the configuration of the present invention and the above-described embodiment,
The plurality of cells of the present invention correspond to the four cells 71 (the first cell 71a, the second cell 71b, the third cell 71c, and the fourth cell 71d) of the embodiment,
And so on
The controller for the on-board battery corresponds to the battery controller 70,
The resistance detection means corresponds to the voltage current sensor 74 and the displacement control unit 77,
The displacement mechanism and the rotation mechanism correspond to the rotation mechanism 76,
The displacement control means corresponds to the displacement control unit 77, but
The present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the first and second embodiments described above, the four cells 71 are arranged in a ring shape having a substantially rectangular shape in plan view, but the present invention is not limited to this. A configuration in which a plurality of cells are arranged in a substantially polygonal annular shape in view or a configuration in which a plurality of cells are arranged in a substantially circular annular shape in plan view may be employed.

  In addition, although the rotation mechanism unit 76 configured to integrally rotate the four cells 71 is not limited thereto, the invention is not limited thereto, and instead of the rotation pedestal 766, a plurality of cells are substantially elongated in plan view The feed mechanism may be arranged in an elliptical ring shape and displaced by sending cells along the track rail.

  In addition, four cells 71 are arranged in a substantially annular shape in plan view, and the rotation pedestal 766 is rotated with the vertical direction of the vehicle as a rotation axis. However, the present invention is not limited to this. It is good also as composition which arranges and a rotation pedestal rotates by making vehicles longitudinal direction into a axis of rotation.

Further, although the plurality of cells 71 integrally rotate in the in-vehicle battery 7, the present invention is not limited to this. The in-vehicle battery itself is rotated by a rotation mechanism provided outside the in-vehicle battery It is also good.
In addition, although the rotating mechanism portion 76 configured by the fixed gear body 762, the driven gear body 763, the drive motor 764, the thrust roller bearing 765, the rotating pedestal 766, and the holding case 767 is described, Instead, a plurality of cells may be appropriately configured as long as they can be integrally rotated.

  Further, although the resistance value acquisition process is started when the operation time of the engine E is equal to or more than the predetermined time, the present invention is not limited thereto, and the elapsed time from the last time the cell displacement process is performed is equal to In the case where the traveling distance of the vehicle is equal to or more than a predetermined distance, the resistance value acquisition process may be started. Alternatively, the process of acquiring the resistance value may be started regardless of the operation time of the engine E or the like by making step S101 in FIG. 6 unnecessary.

  In addition, when the displacement control unit 77 and the battery module 73 conduct for the first time, the identification information of each cell 71 and the position of the rotation pedestal 766 (first position P1, second position P2, third position, and Although the position information is stored in association with the information indicating the position P4 of 4), the present invention is not limited to this, and a sensor for detecting the position of the rotary pedestal 766 in the rotational direction is provided to detect the position detected by the sensor It may be position information associated with identification information. In this case, the rotation angle and rotation direction of the rotary base may be determined based on the position detected by the sensor and the position information.

  In the 180 ° rotation process (step S229 and step S233 in FIG. 10) of the second embodiment described above, the rotation pedestal 766 is rotated 180 ° in the clockwise rotation direction R1 in plan view, but it is not limited thereto. The rotation pedestal 766 may be rotated by 180 ° in the counterclockwise rotation direction R2 in plan view.

7. Vehicle battery 70 Battery control device 71 Cell 71a First cell 71b Second cell 71c Third cell 71d Fourth cell 74 Voltage current sensor 76 Rotational mechanism part 77 Displacement control unit E Engine R1 ... rotation direction R2 ... rotation direction S ... engine room

Claims (3)

A control device for an on-board battery configured of a plurality of cells connected in series and controlling an operation of an on-board battery disposed in an engine room of the vehicle,
Resistance value detection means for detecting the internal resistance value of each of the cells;
A displacement mechanism for displacing the relative position of the cell to an engine disposed in the engine room;
And a displacement control means for operating the displacement mechanism such that the cell with the smallest internal resistance value is located closer to the engine than the other cells. The plurality of cells in the in-vehicle battery are
It is arranged in a substantially annular shape as viewed from a predetermined direction,
The displacement mechanism is
The control device for a vehicle-mounted battery according to claim 1, further comprising: a rotation mechanism configured to integrally rotate the plurality of cells in a rotation direction about an axis along the predetermined direction. The resistance value detection means
The control device for an on-vehicle battery according to claim 1 or 2, wherein the internal resistance value of each of the cells is detected each time a predetermined period elapses.

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