JP5027005B2 - Method for adjusting assembled battery and method for adjusting assembled battery with controller - Google Patents

Description

  The present invention relates to a method for adjusting an assembled battery and a method for adjusting an assembled battery with a controller.

  In recent years, various secondary batteries have been proposed as power sources for portable devices and portable devices, and as power sources for electric vehicles and hybrid vehicles. When this secondary battery is used as a power source for an electric vehicle or a hybrid vehicle, a high output is required. Therefore, a plurality of secondary batteries are electrically connected in series to form an assembled battery. Yes.

By the way, an assembled battery used as a power source of an electric vehicle, a hybrid vehicle, etc., due to its usage environment, a difference in characteristics of each secondary battery constituting the assembled battery, a defect in a component of the secondary battery, etc. A part of the secondary battery constituting the assembled battery may reach a life or failure earlier than other batteries. As a result, the original performance of the assembled battery cannot be exhibited, which may cause an abnormality in the entire system. In order to solve such a problem, a secondary battery that has reached the end of its life or failure earlier than other batteries may be replaced with a normal secondary battery. Various methods for replacing the secondary battery have been proposed (see, for example, Patent Document 1).
JP 2004-185915 A

  Japanese Patent Laid-Open No. 2004-133867 discusses a battery pack in which a plurality of secondary batteries are electrically connected in series or in parallel when a part of replacement secondary batteries is replaced with a new secondary battery for replacement. A method for replacing a new secondary battery with a smaller charge amount than another battery (a normal secondary battery constituting the assembled battery) that is not a replacement object is disclosed. Specifically, the new secondary battery for replacement is charged so that the charge amount of the new secondary battery for replacement is 5 to 20% smaller than the charge amount of other batteries not to be replaced. As a result, when charging / discharging is repeatedly performed by using the assembled battery, the difference in the charged amount (charged amount of electricity) between the replaced new secondary battery and another battery is reduced, so that the assembled battery is configured. It is described that the charge amount of the secondary battery can be made equal. Therefore, it is described that the performance of the assembled battery can be maximized.

  By the way, when an assembled battery is mounted on an electric vehicle or a hybrid vehicle, the battery voltage (electromotive force) or temperature of each secondary battery constituting the assembled battery is detected, and the amount of charge (charged) is based on these values. It is sometimes installed as a battery pack with a controller in combination with a battery controller that estimates the presence of a secondary battery with an abnormal charge amount. When an assembled battery in which a secondary battery is replaced based on the method of Patent Document 1 is used as the assembled battery used for this assembled battery with a controller, the battery controller may detect an abnormality in the charge amount of the secondary battery. was there.

  For example, if the charge amount of the new secondary battery is too small compared to the charge amount of other batteries at the time of battery replacement, the charge amount is abnormal when the assembled battery with a controller is mounted on a hybrid vehicle etc. May be detected. This is because the new secondary battery that has been replaced has a charge amount that is 20% lower than that of other batteries, so the battery voltage may be too low compared to other batteries. is there.

In addition, the new secondary battery that has been replaced has better charge / discharge characteristics than other old secondary batteries that are not to be replaced. The charge amount of the secondary battery may be larger than the charge amount of other secondary batteries. Then, in the battery controller, it may be determined that the charged amount of the replaced new secondary battery is too large compared to the charged amount of the other batteries, and an abnormality in the charged amount may be detected.

  Thus, when a secondary battery whose charge amount is too large compared to other secondary batteries is included in a part of the secondary batteries constituting the assembled battery, for example, this secondary battery Is preferably discharged so that the amount of charge approaches that of other secondary batteries. This is because the performance of the assembled battery can be sufficiently exhibited. However, when the charge amount is adjusted in this way, there is no problem with the charge amount, but this time, the battery voltage of the discharged secondary battery becomes too small compared to the battery voltages of the other secondary batteries. (The battery voltage difference exceeds the normal range), the battery controller may determine that the battery voltage is abnormal, or the amount of charge estimated based on the battery voltage may be determined to be abnormal.

  The present invention has been made in view of the current situation, and can reduce the difference in the charge amount of a plurality of secondary batteries constituting the assembled battery, and constitutes an assembled battery accompanying adjustment of the charge amount It aims at providing the adjustment method of an assembled battery which can suppress the expansion of the battery voltage difference of the secondary battery to do.

  The solution is that a plurality of secondary batteries forming an assembled battery are charged based on a charge amount before adjustment, one or a plurality of first batteries having a large charge amount, and a charge amount smaller than that of the first battery. When the battery is divided into one or a plurality of remaining second batteries, the battery pack adjustment method reduces the difference in charge between the first battery and the second battery forming the battery pack. Alternatively, the plurality of first batteries are all discharged so that the charge amount of each of the first batteries is within a charge amount range determined from the charge amount of the second battery, or the one or more A first adjustment step in which the second batteries are charged by an equal amount of electricity and the charge amount of each of the first batteries is within a charge amount range determined from the charge amount of the second battery after charging. And following the first adjustment step, the first battery and the second battery. Any also is an adjustment method of an assembled battery comprising a second adjusting step for discharging or charging by an equal quantity of electricity, the.

  In the adjustment method of the present invention, in the first adjustment step, one or a plurality of first batteries are discharged, and the charge amount of each first battery is within a charge amount range determined from the charge amount of the second battery. Within range. Alternatively, the charge amount of the first battery is set within the charge amount range determined from the charge amount of the second battery after charging by charging one or more second batteries by the same amount of electricity.

Here, the charge amount range determined from the charge amount of the second battery is, for example, a range from the smallest charge amount to the largest charge amount among the charge amounts of the respective second batteries before or after adjustment. Can be mentioned. Further, there is a range having a predetermined width above and below the average value (median value, mode value, etc.) of the charge amount of each second battery before or after adjustment. Moreover, the range which has the predetermined | prescribed width | variety which made the minimum value of the charge amount of the 2nd battery before adjustment after adjustment or the maximum value the upper limit was mentioned. In addition, when setting the range of the predetermined width, in the assembled battery with a controller using the assembled battery, the maximum difference in charge amount allowed for each secondary battery constituting the assembled battery (the smallest charge amount and the largest charge amount) It is preferable that the size is equal to or smaller than the allowable range of the difference from the charged amount.
Therefore, if the 1st adjustment process of this invention is performed, the adjustment which makes small the difference in the charge amount of the 1st battery which comprises an assembled battery, and a 2nd battery can be performed.

However, in the first adjustment step, the battery voltage difference between the first battery and the second battery is increased by discharging the first battery or charging the second battery. This is because, in general, when a secondary battery is discharged or charged rapidly, the battery voltage temporarily decreases or increases temporarily and then gradually returns.
For this reason, the assembled battery immediately after performing only the 1st adjustment process detects the battery voltage of each secondary battery which comprises an assembled battery, for example, and estimated from the characteristic value (battery voltage etc. based on a battery voltage) When used in an assembled battery with a controller having a battery controller that detects an abnormality in charge amount or the like, a characteristic value (charge amount or the like) may be determined to be abnormal because of a large difference in battery voltage. That is, in some cases, the assembled battery cannot be used properly even if the charge amount is adjusted in the first adjustment step.

  Note that the battery voltage that has temporarily decreased or increased temporarily due to rapid discharge or charging gradually returns thereafter. For this reason, after discharging the first battery or charging the second battery, if these batteries are left for several hours to several days, the difference in battery voltage is reduced, so that the above-mentioned problems can be prevented. This is a poor work efficiency. Further, when it is desired to quickly use an assembled battery (an assembled battery with a controller), a vehicle equipped with the assembled battery, and the like, the request cannot be met.

  However, in the adjustment method of the present invention, following the first adjustment step, in the second adjustment step, both the first battery and the second battery, that is, all the secondary batteries constituting the assembled battery are equal. Discharge or charge by the amount of electricity. Thereby, the battery voltage difference between the first battery and the second battery can be reduced.

This is because the battery voltage of the second battery not discharged in the first adjustment step is greatly reduced by the discharge in the second adjustment step, while the first battery already discharged in the first adjustment step is This is because the amount of decrease in voltage is smaller than that of the second battery even if the discharge is performed again in the second adjustment step.
Alternatively, on the contrary, the first battery that has not been charged in the first adjustment step has already been charged in the first adjustment step, while the battery voltage is significantly increased by charging in the second adjustment step. This is because even if the second battery is charged again in the second adjustment step, the amount of voltage increase is smaller than that of the first battery.

  In addition, in the second adjustment step, both the first battery and the second battery are discharged or charged by the same amount of electricity, so the difference in charge amount between the first battery and the second battery adjusted in the first adjustment step. Is not expanded in the second adjustment step.

  As described above, according to the adjustment method of the present invention, the difference in the charge amount between the first battery and the second battery is reduced in the first adjustment step, and the battery between the first battery and the second battery in the second adjustment step. The voltage difference can be reduced. Therefore, after that, when the assembled battery is combined with the battery controller described above to form an assembled battery with a controller, the assembled battery is appropriately detected without detecting any abnormality in the characteristic value (charge amount, etc.) based on the battery voltage. Will be able to be used. Moreover, according to the adjustment method of the present invention, it is not necessary to leave the battery for a long time in order to reduce the battery voltage difference between the secondary batteries, so that the adjustment of the assembled battery can be completed in a short time.

The charge amount of each secondary battery constituting the assembled battery before adjustment is, for example, the charge amount data calculated (estimated) by the battery controller of the assembled battery with a controller that has been assembled and used. Can be grasped by acquiring.
Moreover, as a 1st battery, it is a secondary battery with a short use period compared with another battery (2nd battery), for example by having exchanged in the past, and with repetition of charging / discharging, A secondary battery having a larger charge amount than other batteries can be given. In addition, secondary batteries (for example, a plurality of batteries) that are less deteriorated and have a larger charge amount than other batteries due to a lower environmental temperature during use than other batteries (second batteries). Among the assembled batteries formed by arranging the secondary batteries, the secondary batteries located near both ends that are easily cooled can be cited.

In the first adjustment step, when there are a plurality of first batteries, they may be discharged by the same amount of electricity all at once, or may be discharged individually (equal amount of electricity or different amounts of electricity). good. Alternatively, some of the plurality of first batteries may be discharged individually and others may be discharged simultaneously (equal amount of electricity or different amounts of electricity).
Similarly, when there are a plurality of second batteries, these charges may be charged by an equal amount of electricity, may be charged all at once, or may be charged individually. Moreover, you may charge a part of several 2nd battery separately, and others simultaneously.

  Furthermore, in the adjustment method of the assembled battery described above, the first adjustment step includes a charge amount of at least one of the one or the plurality of first batteries and a charge amount of the smallest of the second batteries. It is preferable to use a method for adjusting the assembled battery so that the amount of charge is equal.

  The first battery, which had a large amount of charge, has properties such as a shorter use period and less deterioration compared to the second battery, so even if the charge amount is adjusted as described above, In many cases, the amount of charge again becomes larger than that of the second battery due to subsequent use (charging and discharging). Therefore, in the adjustment method of the present invention, in the first adjustment step, the charge amount of at least one of the first batteries is made equal to the charge amount of the secondary battery having the smallest charge amount of the second batteries. did. Thereby, about at least the 1st battery, by subsequent use (charging / discharging), time until charge amount becomes larger than any 2nd battery again can be earned long. As a result, the assembled battery can be used properly over a longer period of time.

  In another solution, a plurality of secondary batteries constituting an assembled battery are charged based on a charge amount before adjustment, one or a plurality of first batteries having a large charge amount, and a charge amount larger than that of the first battery. An assembled battery adjustment method for reducing a difference in charge amount between the first battery and the second battery constituting the assembled battery when divided into a small remaining one or a plurality of second batteries, Either one or a plurality of second batteries are charged, and the charge amount of each of the second batteries is set within a charge amount range determined from the charge amount of the first battery, or one or more of the above-described one or more The first battery is discharged by an equal amount of electricity, and the charge amount of each of the second batteries is set within a charge amount range determined from the charge amount of the first battery after discharge. Following the process and the first adjusting process, the first battery and the second battery. Any also is an adjustment method of an assembled battery comprising a second adjusting step for discharging or charging by an equal quantity of electricity, the.

  In the adjustment method of the present invention, in the first adjustment step, one or a plurality of second batteries are charged, and the charge amount of each second battery is within a charge amount range determined from the charge amount of the first battery. Within range. Alternatively, one or a plurality of first batteries are discharged by an equal amount of electricity, and the charge amount of each second battery is set within a charge amount range determined from the charge amount of the first battery after discharge.

Here, the charge amount range determined from the charge amount of the first battery is, for example, a range from the smallest charge amount to the largest charge amount among the charge amounts of the first batteries before or after adjustment. Can be mentioned. Further, there is a range having a predetermined width above and below the average value (median value, mode value, etc.) of the charge amount of each first battery before or after adjustment. Moreover, the range which has the predetermined | prescribed width | variety which made the minimum value of the charge amount of the 1st battery before adjustment after adjustment or the maximum value the upper limit was mentioned. In addition, when setting the range of the predetermined width, in the assembled battery with a controller using the assembled battery, the maximum difference in charge amount allowed for each secondary battery constituting the assembled battery (the smallest charge amount and the largest charge amount) It is preferable that the size is equal to or smaller than the allowable range of the difference from the charged amount.
Therefore, if the 1st adjustment process of this invention is performed, the adjustment which makes small the difference in the charge amount of the 1st battery which comprises an assembled battery, and a 2nd battery can be performed.

However, in the first adjustment step, charging the second battery or discharging the first battery rather increases the difference in battery voltage between the first battery and the second battery.
On the other hand, in the adjustment method of the present invention, following the first adjustment step, in the second adjustment step, both the first battery and the second battery, that is, all the secondary batteries constituting the assembled battery are treated. Discharge or charge by an equal amount of electricity. Thereby, the difference of the battery voltage of a 1st battery and a 2nd battery can be made small. In addition, in the second adjustment step, both the first battery and the second battery are discharged or charged by the same amount of electricity, so the difference in charge amount between the first battery and the second battery adjusted in the first adjustment step. Is not expanded in the second adjustment step.

  As described above, according to the adjustment method of the present invention, the difference in the charge amount between the first battery and the second battery is reduced in the first adjustment step, and the battery between the first battery and the second battery in the second adjustment step. The voltage difference can be reduced. Therefore, after that, when the assembled battery is combined with the battery controller described above to form an assembled battery with a controller, an abnormality in a characteristic value (charge amount, etc.) based on the battery voltage is not detected, and the assembled battery is appropriately Will be able to be used. Moreover, according to the adjustment method of the present invention, it is not necessary to leave the battery for a long time in order to reduce the battery voltage difference between the secondary batteries, so that the adjustment of the assembled battery can be completed in a short time.

  In the first adjustment step, when there are a plurality of second batteries, they may be charged by the same amount of electricity all at once, or may be charged individually (equal amount of electricity or different amounts of electricity). , Some of them may be charged individually (the same amount of electricity or different amounts of electricity). Similarly, as for the discharge of the plurality of first batteries, each may be discharged by an equal amount of electricity, these may be discharged all at once, each may be discharged individually, or some of them may be discharged. Others may be discharged simultaneously.

  Furthermore, in the battery pack adjustment method described above, the first adjustment step includes a charge amount of at least one of the one or the plurality of second batteries and a charge amount of the largest of the first batteries. It is preferable to use a method for adjusting the assembled battery so that the amount of charge is equal.

  The second battery, which had a small amount of charge, has properties such as a greater degree of deterioration than the first battery. Therefore, even after adjusting the charge amount, In many cases, the charge amount is smaller than that of the first battery again. Therefore, in the adjustment method of the present invention, in the first adjustment step, the charge amount of at least one of the second batteries is made equal to the charge amount of the first battery having the largest charge amount. As a result, at least for the second battery, the time until the charge amount of any other secondary battery (second battery) becomes smaller again is increased by subsequent use (charge / discharge). Can do. As a result, the assembled battery can be used properly over a longer period of time.

  In another solution, a plurality of secondary batteries constituting an assembled battery are charged based on a charge amount before adjustment, one or a plurality of first batteries having a large charge amount, and a charge amount larger than that of the first battery. An assembled battery adjustment method for reducing a difference in charge amount between the first battery and the second battery constituting the assembled battery when divided into a small remaining one or a plurality of second batteries, A step of adjusting a second battery that discharges one or a plurality of second batteries by an equal amount of electricity, and a step of adjusting a first battery that discharges all of the one or more first batteries. An assembled battery comprising: a first battery adjustment step in which a charge amount of the battery is within a charge amount range determined from a charge amount of the second battery after being discharged in the adjustment step of the second battery, respectively. This is the adjustment method.

  The adjustment method of the present invention includes a second battery adjustment step of discharging one or a plurality of second batteries by an equal amount of electricity to each other, and discharging one or a plurality of first batteries to charge the first battery. Are adjusted in the range of the charge amount determined from the charge amount of the second battery after being discharged in the adjustment step of the second battery, respectively. As described above, by discharging both the first battery and the second battery (all the secondary batteries constituting the assembled battery) and keeping the charge amount of the first battery within a predetermined charge amount range, The difference in the charge amount between the first battery and the second battery can be reduced, and the increase in the battery voltage difference between the first battery and the second battery accompanying the adjustment of the charge amount can be suppressed.

The first battery adjustment step and the second battery adjustment step may be performed in this order, may be performed in the reverse order, or may be performed independently and separately.
However, when the adjustment process of the first battery is performed prior to or simultaneously with the adjustment process of the second battery, the amount of electric discharge of the second battery scheduled in the adjustment process of the second battery is taken into consideration. Thus, it is preferable to set the discharge electricity amount (target charge amount) of each first battery.

  In another solution, a plurality of secondary batteries constituting an assembled battery are charged based on a charge amount before adjustment, one or a plurality of first batteries having a large charge amount, and a charge amount larger than that of the first battery. An assembled battery adjustment method for reducing a difference in charge amount between the first battery and the second battery constituting the assembled battery when divided into a small remaining one or a plurality of second batteries, A step of adjusting a second battery for charging one or a plurality of second batteries by an equal amount of electricity, and a step of adjusting a first battery for charging all of the one or a plurality of first batteries, wherein the first An adjustment step of the first battery, wherein the charge amount of the battery is within a charge amount range determined from the charge amount of the second battery after charging in the adjustment step of the second battery, respectively. It is an adjustment method.

  The adjustment method of the present invention includes a second battery adjustment step of charging one or a plurality of second batteries by an equal amount of electricity and a charge amount of the first battery by charging both of the one or more first batteries. Are adjusted in the range of the charge amount determined from the charge amount of the second battery after being charged in the adjustment step of the second battery, respectively. In this way, by charging both the first battery and the second battery (all the secondary batteries constituting the assembled battery) and keeping the charge amount of the first battery within a predetermined charge amount range, The difference in the charge amount between the first battery and the second battery can be reduced, and the increase in the battery voltage difference between the first battery and the second battery accompanying the adjustment of the charge amount can be suppressed.

The first battery adjustment step and the second battery adjustment step may be performed in this order, may be performed in the reverse order, or may be performed independently and separately.
However, when the adjustment process of the first battery is performed prior to or simultaneously with the adjustment process of the second battery, the charge amount of the second battery scheduled in the adjustment process of the second battery is taken into consideration. It is good to set the charge amount (target charge amount) of each first battery.

  Further, in any one of the battery pack adjustment methods described above, the first battery adjustment step includes discharging at least one of the first battery charge amount in the second battery adjustment step. Or it is good to set it as the adjustment method of an assembled battery which makes it equal to the charge amount of the said 2nd battery after charge with the smallest charge amount.

  The first battery, which had a large amount of charge, has properties such as a shorter use period and less deterioration compared to the second battery, so even if the charge amount is adjusted as described above, In many cases, the amount of charge again becomes larger than that of the second battery due to subsequent use (charging and discharging). Therefore, in the adjustment method of the present invention, in the adjustment process of the first battery, the charge amount of at least one of the first batteries is discharged in the adjustment process of the second battery or the second battery after being charged. We decided to make it equal to the charge amount of the smallest charge amount. Thereby, about at least the 1st battery, by subsequent use (charging / discharging), the time until charge amount of all of the 2nd battery becomes larger again can be earned long. As a result, the assembled battery can be used properly over a longer period of time.

  In addition, a plurality of secondary batteries constituting the assembled battery are left with one or more first batteries having a large charge amount based on the charge amount before adjustment and a charge amount smaller than that of the first battery. Or an assembled battery adjustment method for reducing a difference in charge amount between the first battery and the second battery forming the assembled battery when the battery is divided into a plurality of second batteries, A first battery adjustment step of discharging the first battery by an equal amount of electricity; and a second battery adjustment step of discharging the one or more second batteries, wherein the charge amount of the second battery The adjustment method of the assembled battery is preferably provided with the adjustment step of the second battery in which the charge amount is within the range of the charge amount determined from the charge amount of the first battery after discharging in the adjustment step of the first battery.

  In this adjustment method, the adjustment step of the first battery that discharges one or a plurality of first batteries by an equal amount of electricity, and the discharge of both the one or a plurality of second batteries, the charge amount of the second battery, And a second battery adjustment step that is within a charge amount range determined from the charge amount of the first battery after discharging in the first battery adjustment step. As described above, both the first battery and the second battery (all the secondary batteries constituting the assembled battery) are discharged, and the charge amount of the second battery is kept within a predetermined charge amount range. The difference in the charge amount between the first battery and the second battery can be reduced, and the increase in the battery voltage difference between the first battery and the second battery accompanying the adjustment of the charge amount can be suppressed.

The first battery adjustment step and the second battery adjustment step may be performed in this order, may be performed in the reverse order, or may be performed independently and separately.
However, when the adjustment process of the second battery is performed prior to or simultaneously with the adjustment process of the first battery, the amount of discharge electricity of the first battery scheduled in the adjustment process of the first battery is taken into consideration. The amount of discharge electricity (target charge amount) of each second battery may be set.

  In addition, a plurality of secondary batteries constituting the assembled battery are left with one or more first batteries having a large charge amount based on the charge amount before adjustment and a charge amount smaller than that of the first battery. Or an assembled battery adjustment method for reducing a difference in charge amount between the first battery and the second battery forming the assembled battery when the battery is divided into a plurality of second batteries, A first battery adjustment step of charging the first battery with an equal amount of electricity, and a second battery adjustment step of charging the one or more second batteries, wherein the charge amount of the second battery The adjustment method of the assembled battery is preferably provided with the adjustment step of the second battery, which is set within the range of the charge amount determined from the charge amount of the first battery after charging in the adjustment step of the first battery.

  In this adjustment method, the adjustment step of the first battery that charges the one or more first batteries by an equal amount of electricity, and the charge amount of the second battery by charging both the one or more second batteries, A second battery adjustment step that is within a charge amount range determined from the charge amount of the first battery after charging in the first battery adjustment step. As described above, by charging both the first battery and the second battery (all the secondary batteries constituting the assembled battery) and keeping the charge amount of the second battery within a predetermined charge amount range, The difference in the charge amount between the first battery and the second battery can be reduced, and the increase in the battery voltage difference between the first battery and the second battery accompanying the adjustment of the charge amount can be suppressed.

The first battery adjustment step and the second battery adjustment step may be performed in this order, may be performed in the reverse order, or may be performed independently and separately.
However, when the adjustment process of the second battery is performed prior to or simultaneously with the adjustment process of the first battery, the charge amount of the first battery scheduled in the adjustment process of the first battery is considered, It is good to set the charge amount (target charge amount) of each second battery.

  Further, in any one of the battery pack adjustment methods described above, the second battery adjustment step includes discharging at least one charge amount of the second battery in the first battery adjustment step. Alternatively, it is preferable that the assembled battery is adjusted to be equal to the charge amount of the first battery having the largest charge amount among the first batteries after being charged.

  Even if the charge amount of the second battery, which has been reduced, is adjusted as described above, the charge amount is often smaller than that of the first battery again due to subsequent use (charge / discharge). Therefore, in the adjustment method of the present invention, in the adjustment step of the second battery, the charge amount of at least one of the second batteries is discharged in the adjustment step of the first battery or the first battery after being charged. We decided to make it equal to the charge amount of the one with the largest charge amount. Thereby, about at least the 2nd battery, the time until charge amount will become larger than any 1st battery again by subsequent use (charge / discharge) can be earned long. As a result, the assembled battery can be used properly over a longer period of time.

  The other solution is to estimate each charge amount based on the assembled battery formed by electrically connecting a plurality of secondary batteries and each battery voltage of the plurality of secondary batteries, and each estimated charge amount And a battery controller for detecting an abnormality of the plurality of secondary batteries, and a method for adjusting the assembled battery with a controller, wherein the charge amounts of the plurality of secondary batteries estimated by the battery controller are calculated. The charge amount before the adjustment, the plurality of secondary batteries are divided into the first battery and the second battery, and the adjustment method according to any one of claims 1 to 7, It is an adjustment method of an assembled battery with a controller that reduces a difference in charge amount between the first battery and the second battery constituting the assembled battery.

  In the method for adjusting an assembled battery with a controller according to the present invention, the charge amounts of the plurality of secondary batteries constituting the assembled battery estimated by the battery controller are set as the charge amounts before adjustment, and the plurality of secondary batteries constituting the assembled battery are configured. The battery is divided into a first battery and a second battery. And the difference of the charge amount of the 1st battery which makes an assembled battery, and a 2nd battery is made small by one of the adjustment methods mentioned above. That is, any one of the first adjustment process and the second adjustment process described above is performed, or any one of the above-described first battery adjustment process and the second battery adjustment process is performed. Thereby, the difference in the charge amount between the first battery and the second battery can be reduced, and the expansion of the battery voltage difference between the first battery and the second battery accompanying the adjustment of the charge amount can be suppressed. . Therefore, even if an assembled battery with a controller is used immediately after adjustment, there is no significant difference in the charge amount of each secondary battery estimated by the battery controller. Can be used for

Example 1
Next, Example 1 of the present invention will be described with reference to the drawings.
First, the assembled battery 50 with a controller according to the first embodiment will be described. As shown in FIG. 1, the assembled battery 50 with a controller includes an assembled battery 20 and a battery controller 30. Among these, the assembled battery 20 includes 10 secondary batteries (secondary batteries 1 to 10, see FIG. 2) electrically connected in series by a connection member (not shown). In addition, although not shown in figure, the secondary batteries 1-10 each comprise a battery module in which six single cells are connected in series.

  The battery controller 30 is a known battery controller (see, for example, JP-A-2006-79961), and includes a ROM 31, a CPU 32, a RAM 33, and the like. As shown in FIG. 1, the battery controller 30 includes battery voltages V1 to V10, battery temperatures T1 to T10, and current values I (secondary batteries in the first embodiment) that constitute the assembled battery 20. Since the batteries 1 to 10 are connected in series, the current values flowing through the secondary batteries are equal). Furthermore, based on these values, the amount of charge (the amount of electricity charged) of each of the secondary batteries 1 to 10 is estimated, and based on the estimated amount of charge (hereinafter also referred to as the estimated amount of charge). , To detect abnormalities in charge. Specifically, for example, when the maximum difference between the smallest charge amount and the largest charge amount among the estimated charge amounts applied to the secondary batteries 1 to 10 exceeds an allowable range (for example, 0.2 Ah). It is determined that the charging amount is abnormal.

Note that the estimated charge amount data of the secondary batteries 1 to 10 estimated by the battery controller 30 is obtained from the battery controller 30 using a known data monitor 60 as shown in FIG. It can be grasped from the outside.
Moreover, the assembled battery 50 with a controller of the first embodiment is mounted on, for example, an electric vehicle or a hybrid vehicle and used as a power source thereof.

  In the first embodiment, among the secondary batteries 1 to 10 constituting the assembled battery 20, only the secondary battery 8 is newer than the other secondary batteries, so that the degree of deterioration is small. is doing. In such an assembled battery 20, the charge amount of the secondary battery 8 becomes too large compared with the charge amount of other secondary batteries as shown in FIG. It may be determined that the amount is abnormal.

  FIG. 4 is a graph showing the estimated charge amount of the secondary batteries 1 to 10 estimated by the battery controller 30 based on the battery voltages V1 to V10 of the secondary batteries 1 to 10. FIG. 3 is a graph showing battery voltages V <b> 1 to V <b> 10 of the secondary batteries 1 to 10 detected by the battery controller 30. In addition, the numbers 1-10 described on the horizontal axis of the graph shown in FIG.3 and FIG.4 represent the secondary batteries 1-10, respectively.

  The battery controller 30 has the largest maximum estimated charge amount Qmax (in the first embodiment, the charge amount of the secondary battery 8) and the smallest minimum estimated charge amount Qmin (of the estimated charge amount Q of the secondary batteries 1 to 10). In the first embodiment, the difference (maximum difference) ΔQ from the charge amount of the secondary batteries 5 and 6 is calculated. When the maximum difference ΔQ exceeds the allowable range, it is determined that the charging amount is abnormal, and as shown in FIG. 1, the abnormality signal ES is sent to the control unit 70 that performs various controls of the hybrid vehicle or the like. Send to. In response to this, the control unit 70 issues an alarm or the like to the driver or the like.

As described above, when an abnormality in the charge amount is detected, in the first embodiment, the charge amount is adjusted as follows. FIG. 5 is a flowchart illustrating the flow of the adjustment process of the assembled battery 20 according to the first embodiment.
First, in step S1, as shown in FIG. 1, the estimated charge amounts Q (see FIG. 4) of the secondary batteries 1 to 10 constituting the assembled battery 20 are obtained from the battery controller 30 using the data monitor 60, respectively. To do. Subsequently, it progresses to step S2 and the secondary batteries 1-10 are divided into the group of the 1st battery A and the 2nd battery B according to the magnitude of the estimated charge amount Q of the acquired secondary batteries 1-10. In the first embodiment, the secondary battery 8 having a relatively large charge amount is referred to as a first battery A, and the secondary batteries 1 to 7, 9, and 10 having a smaller charge amount are referred to as second batteries B.

(First adjustment process)
Next, it progresses to step S3 (refer FIG. 5), the 1st battery A (secondary battery 8) is discharged, and the charge amount of the 1st battery A is set to the 2nd battery B (secondary batteries 1-7, 9). , 10) of the charge amount range X determined from the charge amount (in the first embodiment, of the charge amount of the second battery B, the range from the smallest charge amount to the largest charge amount is shown in FIG. 6). Within range. In the first embodiment, as shown in FIG. 6, the first battery A (secondary battery 8) is discharged by ΔQ, and the charge amount of the first battery A after the first adjustment step is set to the second battery B. Among them, the charge amount QFmin (= Qmin) of the secondary batteries 5 and 6 having the smallest charge amount was made equal. The charge amount range X is set so as to satisfy an allowable range (for example, 0.2 Ah) of the charge amount allowed in the battery controller 30.

  Specifically, as shown in FIG. 2, a known constant current charging / discharging device 80 is prepared, and the first terminal 81 is connected to the positive electrode terminal 8 b of the first battery A (secondary battery 8). Constant current discharge was performed in a state where the terminal 82 was connected to the negative electrode terminal 8c of the first battery A (secondary battery 8). As described above, the discharge amount is ΔQ obtained by subtracting the charge amount Qmin of the secondary battery 5 or 6 having the smallest charge amount from the second battery B from the charge amount Qmax of the first battery A before the first adjustment step. (See FIG. 6). Thereby, when it sees about the secondary batteries 1-10 after a 1st adjustment process, as shown in FIG. 6, the largest difference (DELTA) QF of charge amount QF is the charge amount of the 2nd battery B concerning a 1st adjustment process. It becomes equal to the maximum difference and can be made smaller than ΔQ before the first adjustment step. That is, the difference in charge amount between the first battery A (secondary battery 8) and the second battery B (secondary batteries 1 to 7, 9, 10) can be reduced.

  However, when only the first battery A (secondary battery 8) is discharged in the first adjustment step described above, the battery voltage V8 of the first battery A (secondary battery 8) temporarily decreases significantly. Therefore, as shown in FIG. 7, the maximum battery voltage difference ΔVJ between the secondary batteries 1 to 10 after the first adjustment step (secondary battery 8 as the first battery A and the battery voltage among the second batteries B). Battery voltage difference between the secondary batteries 1 and 10 having a high value) may be larger than the maximum battery voltage difference ΔV before the first adjustment step.

  For this reason, when the assembled battery 50 with a controller including the assembled battery 20 that has completed only the first adjustment step is used by being mounted on a hybrid vehicle or the like, the battery controller 30 uses these battery voltages V1 to V10 (FIG. 7), the estimated charge amount QJ is calculated. Then, in the battery controller 30, as shown in FIG. 8, the estimated charge amount QJ of the first battery A (secondary battery 8) after the first adjustment step is used as the charge amount of the first battery A (secondary battery 8). A value QJmin much smaller than QFmin (see FIG. 6) is estimated.

  Then, in the battery controller 30, among the estimated charge amounts QJ of the secondary batteries 1 to 10 after the first adjustment step, the maximum estimated charge amount QJmax (charge amount of the secondary batteries 1 and 10) and the minimum estimated charge amount QJmin ( The difference (maximum difference) ΔQJ from the charge amount of the secondary battery 8 is calculated, and if the maximum difference ΔQJ exceeds the allowable range, it is determined that the charge amount is abnormal. For this reason, even though the maximum difference ΔQF (see FIG. 6) of the charge amount QF of the secondary batteries 1 to 10 is within the allowable range of the battery controller 30 (for example, within 0.2 Ah) by the first adjustment step. Therefore, the assembled battery 50 with a controller cannot be used properly.

However, if the first battery A (secondary battery 8) is discharged in the first adjustment step and then left for a long time (for example, several days), the first battery A (secondary battery 8) temporarily lowered. The battery voltage V8 is recovered. Therefore, if the assembled battery 50 with a controller is used after being mounted on a hybrid vehicle or the like, the battery controller 30 will not determine abnormality. However, in this case, work efficiency is poor, and when it is desired to use the assembled battery 50 with a controller as soon as possible, the request cannot be met.
On the other hand, in the present Example 1, the assembled battery 50 with a controller can be used promptly by performing the 2nd adjustment process described below following a 1st adjustment process.

(Second adjustment step)
That is, following step S3, the process proceeds to step S4 (see FIG. 5), and both the first battery A and the second battery B (that is, all the secondary batteries 1 to 10 constituting the assembled battery 20) are As shown in FIG. 9, discharge is performed by an equal amount of electricity ΔQH. Specifically, for example, the secondary batteries 1 to 10 are simultaneously discharged using the constant current charging / discharging device 80 (see FIG. 2) in a state where the secondary batteries 1 to 10 are connected in series.

  As a result, the charge amounts of the secondary batteries 1 to 10 are decreased by ΔQH, respectively, but the maximum difference ΔQG (the maximum charge amount QGmax and the minimum charge amount) of the charge amounts QG of the secondary batteries 1 to 10 after the second adjustment step. The difference in charge amount from QGmin does not vary from the maximum difference ΔQF in the charge amount QF before the second adjustment step (see FIG. 9).

  On the other hand, as shown in FIG. 10, the maximum battery voltage difference between the secondary batteries 1 to 10 after the second adjustment step can be reduced from ΔVJ to ΔVK. This is because the battery voltage (V1 to V7, V9, V10) of the second battery B (secondary batteries 1 to 7, 9, 10) greatly decreases due to the discharge in the second adjustment process, but in the first adjustment process. Even if the first battery A (secondary battery 8) that has already been discharged is discharged again in the second adjustment step, the battery voltage is reduced compared to the second battery B (secondary batteries 1 to 7, 9, 10). This is because the amount is small.

Therefore, when the assembled battery 50 with a controller including the assembled battery 20 that has finished the first and second adjustment steps is used in a hybrid vehicle or the like, the maximum battery voltage difference is reduced to ΔVK in the battery controller 30. Based on the battery voltages V1 to V10 (see FIG. 10), the estimated charge amount QK of the secondary batteries 1 to 10 is calculated (see FIG. 11).
Looking at the estimated charge amount QK, the maximum difference ΔQK between the maximum estimated charge amount QKmax (the estimated charge amount of the secondary batteries 1 and 10) and the minimum estimated charge amount QKmin (the estimated charge amount of the secondary battery 8) is This can be made smaller than the maximum difference ΔQJ (see FIG. 8) of the estimated charge amount QJ before the second adjustment step. Moreover, since it can be smaller than the maximum difference ΔQ (see FIG. 4) of the estimated charge amount Q before adjustment, it can be within an allowable range (for example, 0.2 Ah) in the battery controller 30.

Therefore, even if the assembled battery 50 with a controller including the assembled battery 20 after the second adjustment is used by being mounted on a hybrid vehicle or the like, the battery controller 30 does not detect an abnormality in the charge amount. Therefore, the assembled battery 20 can be used appropriately.
Moreover, in the adjustment method of the first embodiment, in order to reduce the battery voltage difference ΔVJ of the secondary batteries 1 to 10 after the first adjustment step, it is not necessary to leave for a long time. Adjustment can be completed.

  By the way, the first battery A (secondary battery 8) has a characteristic different from that of the second battery B (secondary batteries 1 to 7, 9, 10). Subsequent use (charging / discharging) tends to gradually increase the amount of charge compared to the second battery, so the amount of charge may be larger than that of the second battery B again.

  Therefore, in the adjustment method of the first embodiment, in the first adjustment step, the charge amount of the first battery A (secondary battery 8) is set to the second battery B (secondary batteries 1 to 7, 9, 10). It was made equal to the charge amount QFmin of the secondary batteries 5 and 6 having the smallest charge amount (see FIG. 6). By doing in this way, the 1st battery A (secondary battery 8) is charged more than any 2nd battery B (secondary batteries 1-7, 9, 10) by subsequent use (charge / discharge). The amount of time until the amount increases, that is, the time until the estimated charge amount Q reaches the state shown in FIG. 4 can be earned longer. Thereby, the assembled battery 20 can be used appropriately over a longer period of time.

(Example 2)
Next, a second embodiment of the present invention will be described. The second embodiment is different from the first embodiment only in the adjustment method of the assembled battery, and the other is the same. Therefore, here, the description will focus on the parts different from the first embodiment, and the description of other parts will be omitted or simplified.

FIG. 12 is a flowchart illustrating the flow of the adjustment process of the assembled battery according to the second embodiment.
First, similarly to Example 1, in step S1, estimated charge amounts (see FIG. 4) of the secondary batteries 1 to 10 constituting the assembled battery 20 are obtained. Subsequently, it progresses to step S2 and the secondary batteries 1-10 are divided into the group of the 1st battery A and the 2nd battery B according to the magnitude of the estimated charge amount of the acquired secondary batteries 1-10. Also in the second embodiment, similarly to the first embodiment, the secondary battery 8 is the first battery A, and the secondary batteries 1 to 7, 9, and 10 are the second battery B.

(First battery adjustment process)
Next, it progresses to step T3 (refer FIG. 12), the 1st battery A (secondary battery 8) is discharged, and the charge amount of the 1st battery A is after the discharge in the adjustment process of the 2nd battery later. Charge amount range Y determined from the charge amount of the second battery B (secondary batteries 1 to 7, 9, 10) (from the smallest charge amount to the largest charge amount among the charge amounts of the second battery B after discharge) Range, see FIG. 16). In the present Example 2, the secondary battery with the smallest charge amount among the charge amount QG (see FIG. 16) of the second battery B (secondary batteries 1 to 7, 9, 10) after the adjustment process of the second battery. The amount of electricity discharged from the first battery A is set so as to be equal to the charge amount QGmin (see FIG. 16) of the batteries 5 and 6, and as shown in FIG. 13, the charge amount of the first battery A is QFmin (= QGmin). The battery was discharged until
Note that the charge amount range Y is set so as to satisfy an allowable range (for example, 0.2 Ah) of the charge amount allowed in the battery controller 30.

  At this time, the battery voltage of the first battery A (secondary battery 8) greatly decreases, and as shown in FIG. 14, the maximum battery voltage difference ΔVJ between the first battery A and the second battery B is equal to that of the first battery. It may be larger than the maximum battery voltage difference ΔV before the adjustment process. For this reason, when the assembled battery 50 with a controller including the assembled battery 20 that has completed only the adjustment process of the first battery is used in a hybrid vehicle or the like, the battery controller 30 uses the maximum difference in the estimated charge amount QJ. If ΔQJ (see FIG. 15) exceeds the allowable range, it is determined that the charge amount is abnormal. Therefore, in this state, the assembled battery 50 with a controller cannot be used properly. However, the assembled battery 50 with a controller can be used promptly by performing the adjustment process of the second battery described below following the adjustment process of the first battery.

(Second battery adjustment process)
That is, following step T3, the process proceeds to step T4 (see FIG. 12), and the second battery B (secondary batteries 1 to 7, 9, 10) is discharged by the same amount of electricity as shown in FIG. In addition, the charge amount of the secondary batteries 5 and 6 having the smallest charge amount among the second batteries B (secondary batteries 1 to 7, 9, and 10) is set to the charge amount of the first battery A (secondary battery 8). Make equal. Thereby, the maximum charge amount QGmax after the second battery adjustment step is changed without changing the minimum charge amount QGmin after the second battery adjustment step from the minimum charge amount QFmin before the second battery adjustment step. It can be made smaller than the maximum charge amount QFmax (see FIG. 13) before the adjustment process of two batteries. Therefore, the maximum difference ΔQG (the difference between the maximum charge amount QGmax and the minimum charge amount QGmin) of the charge amount QG after the adjustment process of the second battery is larger than the maximum difference ΔQF of the charge amount QF before the adjustment process of the second battery. Can be small. That is, the difference in charge amount between the first battery A (secondary battery 8) and the second battery B (secondary batteries 1 to 7, 9, 10) can be reduced.

In addition, at this time, the battery voltage of the first battery A (secondary battery 8) does not fluctuate, but the battery voltage of the second battery B (secondary batteries 1 to 7, 9, 10) greatly decreases. As shown, the maximum battery voltage difference ΔVK of the secondary batteries 1 to 10 can be significantly reduced from the maximum battery voltage difference ΔVJ before the adjustment process of the second battery.
Therefore, when the assembled battery 50 with a controller including the assembled battery 20 that has completed the adjusting process of the first battery and the adjusting process of the second battery is used by being mounted on a hybrid vehicle or the like, the battery controller 30 uses the maximum battery. Based on the battery voltages V1 to V10 (see FIG. 17) in which the voltage difference is reduced to ΔVK, the estimated charge amount QK of the secondary batteries 1 to 10 is calculated (see FIG. 18).

  Looking at the estimated charge amount QK, as shown in FIG. 18, the maximum estimated charge amount QKmax (the estimated charge amount of the secondary batteries 1 and 10) and the minimum estimated charge amount QKmin (the estimated charge amount of the secondary battery 8). Can be made smaller than the maximum difference ΔQJ of the estimated charge amount QJ before the adjustment process of the second battery. Moreover, since it can be smaller than the maximum difference ΔQ (see FIG. 4) of the estimated charge amount Q before adjustment, it can be within an allowable range (for example, 0.2 Ah) in the battery controller 30. Therefore, even if the assembled battery 50 with a controller including the assembled battery 20 after the second adjustment is used by being mounted on a hybrid vehicle or the like, the battery controller 30 does not detect an abnormality in the charge amount. Therefore, the assembled battery 20 can be used appropriately.

(Example 3)
Next, Embodiment 3 of the present invention will be described. The third embodiment is different from the first embodiment only in the adjustment method of the assembled battery, and the other is the same. Therefore, here, the description will focus on the parts different from the first embodiment, and the description of other parts will be omitted or simplified.

FIG. 19 is a flowchart illustrating the flow of the adjustment process of the assembled battery according to the third embodiment.
First, similarly to Example 1, in step S1, estimated charge amounts (see FIG. 4) of the secondary batteries 1 to 10 constituting the assembled battery 20 are obtained. Subsequently, it progresses to step S2 and the secondary batteries 1-10 are divided into the group of the 1st battery A and the 2nd battery B according to the magnitude of the estimated charge amount of the acquired secondary batteries 1-10. Also in the third embodiment, as in the first embodiment, the secondary battery 8 is the first battery A, and the secondary batteries 1 to 7, 9, and 10 are the second battery B.

(Second battery adjustment process)
Next, it progresses to step U3 (refer FIG. 19), the 2nd battery B (secondary batteries 1-7, 9, 10) is charged by the mutually equal electric quantity, and the 2nd battery B (secondary batteries 1-7) is charged. , 9, 10), the charge amount of the secondary batteries 5 and 6 having the smallest charge amount is made larger than the charge amount QFmin (see FIG. 20) of the first battery A (secondary battery 8).

  At this time, the battery voltages of the second battery B (secondary batteries 1 to 7, 9, 10) all greatly increase, and the maximum battery voltage of the first battery A and the second battery B as shown in FIG. The difference ΔVJ may be larger than the maximum battery voltage difference ΔV before the adjustment process of the second battery. For this reason, when the assembled battery 50 with a controller including the assembled battery 20 that has completed only the adjustment process of the second battery is used in a hybrid vehicle or the like, the battery controller 30 uses the maximum difference in the estimated charge amount QJ. If ΔQJ (see FIG. 22) exceeds the allowable range, it is determined that the charge amount is abnormal. Therefore, in this state, the assembled battery 50 with a controller cannot be used properly. However, the assembled battery 50 with a controller can be used promptly by performing the adjustment process of the first battery described below following the adjustment process of the second battery.

(First battery adjustment process)
That is, following step U3, the process proceeds to step U4 (see FIG. 19), where the first battery A (secondary battery 8) is charged and the charge amount of the first battery A is charged in the adjustment process of the second battery. Charge amount range Y determined from the charge amount QG of the second battery B after the charge (the range from the smallest charge amount to the largest charge amount among the charge amounts QG of the second battery B after charge, see FIG. 23) Within the range of In the third embodiment, as shown in FIG. 23, the charge amount of the first battery A (secondary battery 8) is the highest among the second batteries B (secondary batteries 1 to 7, 9, 10). The amount of charge of the small secondary batteries 5 and 6 was made equal. Note that the charge amount range Y is set so as to satisfy an allowable range (for example, 0.2 Ah) of the charge amount allowed in the battery controller 30.

  Thereby, the minimum charge amount QGmin after the adjustment process of the first battery can be reduced by changing the maximum charge amount QGmax after the adjustment process of the first battery from the QFmax before the adjustment process of the first battery. It can be made larger than QFmin before the adjustment step. Therefore, the maximum difference ΔQG () of the charge amount QG of the secondary batteries 1 to 10 after the adjustment process of the first battery is larger than the maximum difference ΔQF of the charge amount QF of the secondary batteries 1 to 10 before the adjustment process of the first battery. The difference between the maximum charge amount QGmax and the minimum charge amount QGmin) can be reduced. That is, the difference in charge amount between the first battery A (secondary battery 8) and the second battery B (secondary batteries 1 to 7, 9, 10) can be reduced.

In addition, at this time, the battery voltage of the second battery B (secondary batteries 1 to 7, 9, 10) does not fluctuate, but the battery voltage of the first battery A (secondary battery 8) greatly increases. As shown, the maximum battery voltage difference ΔVK of the secondary batteries 1 to 10 can be significantly reduced from the maximum battery voltage difference ΔVJ before the adjustment process of the first battery.
Therefore, when the assembled battery 50 with a controller including the assembled battery 20 that has finished the adjusting process of the second battery and the adjusting process of the first battery is used by being mounted on a hybrid vehicle or the like, the battery controller 30 uses the maximum battery. Based on the battery voltages V1 to V10 (see FIG. 24) in which the voltage difference is reduced to ΔVK, the estimated charge amount QK of the secondary batteries 1 to 10 is calculated (see FIG. 25).

  Looking at the estimated charge amount QK, as shown in FIG. 25, the maximum estimated charge amount QKmax (the estimated charge amount of the secondary batteries 1 and 10) and the minimum estimated charge amount QKmin (the estimated charge amount of the secondary battery 8). Can be made smaller than the maximum difference ΔQJ of the estimated charge amount QJ before the adjustment process of the first battery. Moreover, since it can be smaller than the maximum difference ΔQ (see FIG. 4) of the estimated charge amount Q before adjustment, it can be within an allowable range (for example, 0.2 Ah) in the battery controller 30. Therefore, even if the assembled battery 50 with a controller including the assembled battery 20 after the adjustment process of the first battery is used by being mounted on a hybrid vehicle or the like, the battery controller 30 detects an abnormality in the charge amount. Therefore, the assembled battery 20 can be used appropriately.

Example 4
Next, a fourth embodiment of the present invention will be described. The fourth embodiment is different from the first embodiment only in the secondary battery constituting the assembled battery and the adjustment method thereof, and the other is the same. Therefore, here, the description will focus on the parts different from the first embodiment, and the description of other parts will be omitted or simplified.

As shown in FIG. 1, the assembled battery 150 with a controller of the fourth embodiment includes an assembled battery 120 in which secondary batteries 101 to 110 are connected in series with each other, and a battery controller 30 equivalent to the first embodiment. is doing. In Example 4, the secondary battery 108 among the secondary batteries 101 to 110 constituting the assembled battery 120 is compared with other secondary batteries as shown in FIG. The charge amount may become too small, and the battery controller 30 may determine that the charge amount is abnormal.
FIG. 27 is a graph showing the estimated charge amounts of the secondary batteries 101 to 110 estimated by the battery controller 30 based on the battery voltages V1 to V10 of the secondary batteries 101 to 110. FIG. 26 is a graph showing the battery voltages V1 to V10 of the secondary batteries 101 to 110 detected by the battery controller 30, respectively. In the fourth embodiment, the secondary batteries 101 to 110 are abbreviated as 1 to 10 in FIGS.

  The battery controller 30 has the largest maximum estimated charge amount Qmax (in the fourth embodiment, the charge amounts of the secondary batteries 101 and 110) and the smallest minimum estimated charge amount among the estimated charge amounts Q of the secondary batteries 101 to 110. A difference (maximum difference) ΔQ from Qmin (in the fourth embodiment, the amount of charge of the secondary battery 108) is calculated. When the maximum difference ΔQ exceeds the allowable range, it is determined that the charging amount is abnormal, and as shown in FIG. 1, the abnormality signal ES is sent to the control unit 70 that performs various controls of the hybrid vehicle or the like. Send to. In response to this, the control unit 70 issues an alarm or the like to the driver or the like.

As described above, when an abnormality in the charge amount is detected, in the fourth embodiment, the charge amount is adjusted as follows. FIG. 28 is a flowchart illustrating a flow of the adjustment process of the assembled battery according to the fourth embodiment.
First, in the same manner as in the first embodiment, in step V1, estimated charge amounts (see FIG. 27) of the secondary batteries 101 to 110 constituting the assembled battery 120 are acquired. Next, the process proceeds to step V2, and the secondary batteries 101 to 110 are divided into a group of the first battery A and the second battery B according to the obtained estimated charge amount Q of the secondary batteries 101 to 110. In the fourth embodiment, the secondary batteries 101 to 107, 109, and 110 having a relatively large charge amount are referred to as the first battery A, and the secondary battery 108 having a smaller charge amount is referred to as the second battery B.

(First adjustment process)
Next, the process proceeds to step V3 (see FIG. 28), and as shown in FIG. 29, the second battery B (secondary battery 108) is charged, and the charge amount of the second battery B is set to the first battery A (second battery). Charge amount range X determined from the charge amounts of the secondary batteries 101 to 107, 109, 110) (in the fourth embodiment, among the charge amounts of the first battery A, the range from the smallest charge amount to the largest charge amount) )). In the fourth embodiment, as shown in FIG. 29, the charge amount of the second battery B is made equal to the charge amount QFmax (= Qmax) of the secondary batteries 101 and 110 having the largest charge amount among the first batteries A. . The charge amount range X is set so as to satisfy an allowable range (for example, 0.2 Ah) of the charge amount allowed in the battery controller 30.

  Specifically, as shown in FIG. 2, a constant current charging / discharging device 80 is used, the first terminal 81 is connected to the positive electrode terminal 8b of the second battery B (secondary battery 108), and the second terminal 82 is connected. The constant current charge was performed in the state connected to the negative electrode terminal 8c of the 2nd battery B (secondary battery 108). Accordingly, when viewing the secondary batteries 101 to 110 after the first adjustment step, as shown in FIG. 29, the maximum difference ΔQF of the charge amount QF is the charge amount of the first battery A applied before the first adjustment step. It becomes equal to the maximum difference and can be made smaller than ΔQ before the first adjustment step. That is, the difference in charge amount between the second battery B (secondary battery 108) and the first battery A (secondary batteries 101 to 107, 109, 110) can be reduced.

  However, when only the second battery B (secondary battery 108) is charged in the first adjustment step described above, the battery voltage V8 of the second battery B temporarily increases significantly. Therefore, as shown in FIG. 30, the maximum battery voltage difference ΔVJ between the secondary batteries 101 to 110 after the first adjustment step (the secondary battery 108 as the second battery B and the battery voltage among the first batteries A). Battery voltage difference between the secondary batteries 105 and 106 having a low value) may be larger than the maximum battery voltage difference ΔV before the first adjustment step.

  For this reason, when the assembled battery 150 with a controller including the assembled battery 120 that has completed only the first adjustment step is used by being mounted on a hybrid vehicle or the like, the battery controller 30 uses these battery voltages V1 to V10 (see FIG. 30)), the estimated charge amount QJ is calculated. Then, in the battery controller 30, as shown in FIG. 31, the estimated charge amount QJ of the second battery B (secondary battery 108) after the first adjustment step is used as the charge amount of the second battery B (secondary battery 108). The value QJmax is estimated to be much larger than QFmax (see FIG. 29).

  Then, in the battery controller 30, among the estimated charge amounts QJ of the secondary batteries 101 to 110 after the first adjustment step, the maximum estimated charge amount QJmax (the estimated charge amount of the secondary battery 108) and the minimum estimated charge amount QJmin (two The difference (maximum difference) ΔQJ from the estimated charge amount of the secondary batteries 105 and 106) is calculated, and it is determined that the charge amount is abnormal if the maximum difference ΔQJ exceeds the allowable range. For this reason, although the maximum difference ΔQF (see FIG. 29) of the charge amount QF of the secondary batteries 101 to 110 is within the allowable range of the battery controller 30 (for example, within 0.2 Ah) by the first adjustment step. Therefore, the assembled battery 50 with a controller cannot be used properly.

However, if the second battery B (secondary battery 108) is charged in the first adjustment step and then left for a long time (for example, several days), the temporarily increased battery voltage V8 of the second battery B is recovered. . Therefore, if the assembled battery 150 with a controller is used after being mounted in a hybrid vehicle or the like, the battery controller 30 will not determine abnormality. However, in this case, the work efficiency is poor, and when it is desired to use the assembled battery 150 with a controller as soon as possible, the request cannot be met.
On the other hand, in the present Example 4, the assembled battery 150 with a controller can be used promptly by performing the second adjustment process described below following the first adjustment process.

(Second adjustment step)
That is, following step V3, the process proceeds to step V4 (see FIG. 28), and both the first battery A and the second battery B (that is, all the secondary batteries 101 to 110 constituting the assembled battery 120) are As shown at 32, the battery is charged by an equal amount of electricity ΔQI. Specifically, for example, the secondary batteries 101 to 110 are charged all at once using the constant current charging / discharging device 80 (see FIG. 2) in a state where the secondary batteries 101 to 110 are connected in series.

  As a result, the charge amounts of the secondary batteries 101 to 110 increase by ΔQI, respectively, but the maximum difference ΔQG (the maximum charge amount QGmax and the minimum charge amount) of the charge amounts QG of the secondary batteries 101 to 110 after the second adjustment step. The charge amount difference from QGmin does not vary from the maximum difference ΔQF of the charge amount QF before the second adjustment step.

  On the other hand, as shown in FIG. 33, the maximum battery voltage difference between the secondary batteries 101 to 110 after the second adjustment step can be reduced from ΔVJ to ΔVK. This is because the battery voltage (V1 to V7, V9, V10) of the first battery A (secondary batteries 101 to 107, 109, 110) greatly increases due to the charging in the second adjustment step, but in the first adjustment step. This is because the second battery B (secondary battery 108) that has already been charged has a smaller increase in battery voltage than the first battery A even if it is charged again in the second adjustment step.

  Accordingly, when the assembled battery 150 with a controller including the assembled battery 120 after the first and second adjustment steps is used by being mounted on a hybrid vehicle or the like, the maximum battery voltage difference is reduced to ΔVK in the battery controller 30. Based on the battery voltages V1 to V10 (see FIG. 33), the estimated charge amount QK of the secondary batteries 101 to 110 is calculated (see FIG. 34).

  Looking at the estimated charge amount QK, as shown in FIG. 34, the maximum estimated charge amount QKmax (the estimated charge amount of the secondary battery 108) and the minimum estimated charge amount QKmin (the estimated charge amounts of the secondary batteries 105 and 106). Can be made smaller than the maximum difference ΔQJ of the estimated charge amount QJ before the second adjustment step. Moreover, since it can be smaller than the maximum difference ΔQ (see FIG. 27) of the estimated charge amount Q before adjustment, it can be within an allowable range (for example, 0.2 Ah) in the battery controller 30.

Therefore, even if the assembled battery 150 with the controller including the assembled battery 120 after the second adjustment step is used by being mounted on a hybrid vehicle or the like, the battery controller 30 may detect an abnormality in the charge amount. Therefore, the assembled battery 120 can be used appropriately.
In addition, in the adjustment method of the fourth embodiment, it is not necessary to leave the battery pack 120 for a long time in order to reduce the battery voltage difference ΔVJ between the secondary batteries 101 to 110 after the first adjustment step. Adjustment can be completed.

  By the way, the second battery B (secondary battery 108) is different in characteristics from the first battery A (secondary batteries 101 to 107, 109, 110). Subsequent use (charging / discharging) tends to gradually reduce the charge amount as compared to the first battery A, so the charge amount may be smaller than that of the first battery A again.

  Therefore, in the adjustment method of the fourth embodiment, in the first adjustment step, the charge amount of the second battery B (secondary battery 108) is set to the value of the first battery A (secondary batteries 101 to 107, 109, 110). It was made equal to the charge amount QFmax of the secondary batteries 101 and 110 having the largest charge amount (see FIG. 29). By doing in this way, until the charge amount of the second battery B becomes smaller than any of the first batteries A due to subsequent use (charge / discharge), that is, the estimated charge amount Q is again shown in FIG. You can earn longer time to reach the state. Thereby, the assembled battery 120 can be used appropriately over a longer period of time.

(Example 5)
Next, a fifth embodiment of the present invention will be described. The fifth embodiment is different from the first embodiment only in the secondary battery constituting the assembled battery and the adjustment method thereof, and the other is the same. Therefore, here, the description will focus on the parts different from the first embodiment, and the description of other parts will be omitted or simplified.

  As shown in FIG. 1, the assembled battery 250 with a controller according to the fifth embodiment includes an assembled battery 220 in which secondary batteries 201 to 210 are connected in series with each other, and a battery controller 30 equivalent to the first embodiment. is doing. In Example 5, the secondary batteries 201 and 210 among the secondary batteries 201 to 210 constituting the assembled battery 220 are replaced with other secondary batteries as shown in FIG. In comparison, the charge amount may be too large, and the battery controller 30 may determine that the charge amount is abnormal.

As the assembled battery 220 of the fifth embodiment, for example, the secondary batteries 201 to 210 are arranged in a row, and the secondary batteries 201 and 210 located at both ends of the row are connected to the other batteries. The secondary batteries 202 to 209 can be easily cooled. In such an assembled battery 220, the secondary batteries 201 and 210 are less deteriorated because the environmental temperature exposed during use is lower than that of the other secondary batteries 202 to 209. Along with this, the charge amount tends to gradually increase.
In the fifth embodiment, the secondary batteries 201 to 210 are abbreviated as 1 to 10 in FIGS. 35 to 43.

  The battery controller 30 has the largest maximum estimated charge amount Qmax (in the fifth embodiment, the charge amount of the secondary batteries 201, 210) and the smallest minimum estimated charge amount among the estimated charge amounts Q of the secondary batteries 201-210. A difference (maximum difference) ΔQ from Qmin (charge amount of the secondary batteries 205 and 206 in the fifth embodiment) is calculated. When the maximum difference ΔQ exceeds the allowable range, it is determined that the charging amount is abnormal, and as shown in FIG. 1, the abnormality signal ES is sent to the control unit 70 that performs various controls of the hybrid vehicle or the like. Send to. In response to this, the control unit 70 issues an alarm or the like to the driver or the like.

As described above, when an abnormality in the charge amount is detected, in the fifth embodiment, the charge amount is adjusted as follows. FIG. 37 is a flowchart illustrating a flow of the adjustment process of the assembled battery according to the fifth embodiment.
First, in the same manner as in the first embodiment, in step W1, the estimated charge amount (see FIG. 36) of the secondary batteries 201 to 210 constituting the assembled battery 220 is acquired. Next, the process proceeds to Step W2, and the secondary batteries 201 to 210 are divided into a group of the first battery A and the second battery B according to the obtained estimated charge amount Q of the secondary batteries 201 to 210. In the fifth embodiment, the secondary batteries 201 and 210 having relatively large charge amounts are referred to as the first battery A, and the secondary batteries 202 to 209 having smaller charge amounts are referred to as the second battery B.

(First adjustment process)
Next, it progresses to step W3 (refer FIG. 37), the 1st battery A (secondary battery 201,210) is discharged, and the charge amount of the 1st battery A is set to the 2nd battery B (secondary batteries 202-209). ) Within the range of the charge amount range X determined from the charge amount (see FIG. 38, in the fifth embodiment, the range from the smallest charge amount to the largest charge amount among the charge amounts of the second battery B). To. In the fifth embodiment, as shown in FIG. 38, the charge amount of the first battery A is made equal to the charge amount of the secondary batteries 205 and 206 having the smallest charge amount among the second batteries B. The charge amount range X is set so as to satisfy an allowable range (for example, 0.2 Ah) of the charge amount allowed in the battery controller 30.

  Thereby, when looking at the secondary batteries 201 to 210 after the first adjustment step, as shown in FIG. 38, the maximum difference ΔQF of the charge amount QF is the charge amount of the second battery B applied before the first adjustment step. It becomes equal to the maximum difference and can be made smaller than ΔQ before the first adjustment step. That is, the difference in charge amount between the first battery A (secondary batteries 201 and 210) and the second battery B (secondary batteries 202 to 209) can be reduced.

  However, when only the first battery A is discharged in the first adjustment step described above, the battery voltages V1 and V10 of the first battery A (secondary batteries 201 and 210) are temporarily greatly reduced. For this reason, as shown in FIG. 39, the maximum battery voltage difference ΔVJ of the secondary batteries 201 to 210 after the first adjustment step (secondary batteries 201 and 210 as the first battery A and the second battery B most). The battery voltage difference between the secondary batteries 202 and 209 having a high battery voltage) may be larger than the maximum battery voltage difference ΔV before the first adjustment step.

  For this reason, when the assembled battery 250 with a controller including the assembled battery 220 that has completed only the first adjustment step is used by being mounted on a hybrid vehicle or the like, the battery controller 30 uses these battery voltages V1 to V10 (see FIG. 39)), the estimated charge amount QJ is calculated. Then, in the battery controller 30, as shown in FIG. 40, the estimated charge amount QJ of the first battery A (secondary batteries 201, 210) after the first adjustment step is used as the charge amount QFmin (FIG. 38) of the first battery A. It is estimated that the value QJmin is much smaller than the reference.

  Then, in the battery controller 30, among the estimated charge amounts QJ of the secondary batteries 201 to 210 after the first adjustment step, the maximum estimated charge amount QJmax (the estimated charge amount of the secondary batteries 202 and 209) and the minimum estimated charge amount QJmin. A difference (maximum difference) ΔQJ from (the estimated charge amount of the secondary batteries 201, 210) is calculated, and it is determined that the charge amount is abnormal if the maximum difference ΔQJ exceeds the allowable range. For this reason, even though the maximum difference ΔQF (see FIG. 38) of the charge amount QF of the secondary batteries 201 to 210 is within the allowable range of the battery controller 30 (for example, within 0.2 Ah) by the first adjustment step. Therefore, the assembled battery 250 with a controller cannot be used properly.

However, if the first battery A is discharged in the first adjustment step and then left for a long time (for example, for several days), the battery voltage of the first battery A (secondary batteries 201, 210) temporarily decreased. V1 and V10 recover. Therefore, if the assembled battery 250 with a controller is used after being mounted on a hybrid vehicle or the like, the battery controller 30 will not determine an abnormality. However, in this case, the work efficiency is poor, and when it is desired to use the assembled battery 250 with a controller as soon as possible, the request cannot be met.
On the other hand, in the present Example 5, the assembled battery 250 with a controller can be used promptly by performing the 2nd adjustment process described below following a 1st adjustment process.

(Second adjustment step)
That is, following step W3, the process proceeds to step W4 (see FIG. 37), and both the first battery A and the second battery B (that is, all the secondary batteries 201 to 210 constituting the assembled battery 220) are As shown at 41, the same amount of electricity is discharged. Specifically, for example, the secondary batteries 201 to 210 are discharged all at once using the constant current charging / discharging device 80 (see FIG. 2) in a state where the secondary batteries 201 to 210 are connected in series.

  As a result, the charge amounts of the secondary batteries 201 to 210 are reduced by an equal amount of electricity, respectively, but the maximum difference ΔQG (the maximum charge amount QGmax and the minimum charge amount) of the charge amounts QG of the secondary batteries 201 to 210 after the second adjustment step. The charge amount difference from the charge amount QGmin does not vary from the maximum difference ΔQF of the charge amount QF before the second adjustment step.

  On the other hand, as shown in FIG. 42, the maximum battery voltage difference of the secondary batteries 201 to 210 after the second adjustment step can be reduced from ΔVJ to ΔVK. This is because the battery voltage (V2 to V9) of the second battery B (secondary batteries 202 to 209) greatly decreases due to the discharge in the second adjustment step, but the first battery A that has already been discharged in the first adjustment step. This is because the amount of decrease in battery voltage is smaller than that of the second battery B even if the (secondary batteries 201, 210) are discharged again in the second adjustment step.

  Accordingly, when the assembled battery 250 with a controller including the assembled battery 220 after the first and second adjustment steps is used by being mounted on a hybrid vehicle or the like, the maximum battery voltage difference is reduced to ΔVK in the battery controller 30. Based on the battery voltages V1 to V10 (see FIG. 42), the estimated charge amount QK of the secondary batteries 201 to 210 is calculated (see FIG. 43).

  Looking at the estimated charge amount QK, as shown in FIG. 43, the maximum estimated charge amount QKmax (the estimated charge amount of the secondary batteries 202 and 209) and the minimum estimated charge amount QKmin (the estimated charge of the secondary batteries 201 and 210). The maximum difference ΔQK with respect to the amount) can be made smaller than the maximum difference ΔQJ of the estimated charge amount QJ before the second adjustment step. Moreover, since it can be smaller than the maximum difference ΔQ (see FIG. 36) of the estimated charge amount Q before adjustment, it can be within an allowable range (for example, 0.2 Ah) in the battery controller 30.

Therefore, even if the assembled battery 250 with a controller including the assembled battery 220 after the second adjustment step is used by being mounted on a hybrid vehicle or the like, the battery controller 30 may detect an abnormality in the charge amount. Therefore, the assembled battery 220 can be used appropriately.
Moreover, in the adjustment method of the fifth embodiment, in order to reduce the battery voltage difference ΔVJ of the secondary batteries 201 to 210 after the first adjustment step, it is not necessary to leave for a long time. Adjustment can be completed.

(Example 6)
Next, a sixth embodiment of the present invention will be described. The sixth embodiment is different from the first embodiment only in the method of adjusting the assembled battery, and the other is the same. Therefore, here, the description will focus on the parts different from the first embodiment, and the description of other parts will be omitted or simplified.

FIG. 44 is a flowchart illustrating a flow of an adjustment process of the assembled battery according to the sixth embodiment.
First, similarly to Example 1, in step S1, estimated charge amounts (see FIG. 4) of the secondary batteries 1 to 10 constituting the assembled battery 20 are obtained. Subsequently, it progresses to step S2 and the secondary batteries 1-10 are divided into the group of the 1st battery A and the 2nd battery B according to the magnitude of the estimated charge amount of the acquired secondary batteries 1-10. Also in the sixth embodiment, similarly to the first embodiment, the secondary battery 8 is the first battery A, and the secondary batteries 1 to 7, 9, and 10 are the second battery B.

(First adjustment process)
Next, it progresses to step M3 (refer FIG. 44), the 2nd battery B (secondary batteries 1-7, 9, 10) is charged only by the mutually same electric quantity, and 1st battery A (secondary battery 8) of Charge amount range X determined from the charge amount of the second battery B after charging (in the sixth embodiment, the range from the smallest charge amount to the largest charge amount among the charge amounts of the second battery B in the sixth embodiment) And within the range of FIG. In Example 6, as shown in FIG. 45, all the second batteries B (secondary batteries 1 to 7, 9, 10) are equally charged by ΔQ, and the second battery B after the first adjustment process is charged. Among them, the charge amount QFmin of the secondary batteries 5 and 6 having the smallest charge amount was made equal to the charge amount of the first battery A (secondary battery 8). Specifically, the second battery B (secondary batteries 1 to 7, 9, 10) is electrically connected in series with each other using the constant current charging / discharging device 80 (see FIG. 2). Battery B (secondary batteries 1-7, 9, 10) was charged all at once by ΔQ.

  The charge amount range X is set so as to satisfy an allowable range (for example, 0.2 Ah) of the charge amount allowed in the battery controller 30. Further, as described above, ΔQ is the largest maximum estimated charge amount Qmax among the estimated charge amounts Q of the secondary batteries 1 to 10 before the first adjustment step (in the sixth embodiment, the charge of the secondary battery 8). Amount) and the smallest minimum estimated charge amount Qmin (the charge amount of the secondary batteries 5 and 6 in the sixth embodiment) (maximum difference) (see FIG. 4).

  Thereby, when looking at the secondary batteries 1 to 10 after the first adjustment step, as shown in FIG. 45, the maximum difference ΔQF of the charge amount QF is the charge amount of the second battery B applied before the first adjustment step. It becomes equal to the maximum difference and can be made smaller than ΔQ before the first adjustment step. That is, the difference in charge amount between the first battery A (secondary battery 8) and the second battery B (secondary batteries 1 to 7, 9, 10) can be reduced.

  However, when the second battery B (secondary batteries 1 to 7, 9, 10) is charged by the first adjustment step described above, the battery voltages V 1 to V2 of the second battery B (secondary batteries 1 to 7, 9, 10) V7, V9, and V10 increase temporarily temporarily. For this reason, as shown in FIG. 46, the maximum battery voltage difference ΔVJ of the secondary batteries 1 to 10 after the first adjustment step (the secondary battery 8 being the first battery A and the battery voltage among the second batteries B is the most). Battery voltage difference between the secondary batteries 1 and 10 having a high value) may be larger than the maximum battery voltage difference ΔV before the first adjustment step.

  For this reason, when the assembled battery 50 with a controller including the assembled battery 20 that has completed only the first adjustment step is used by being mounted on a hybrid vehicle or the like, the battery controller 30 uses these battery voltages V1 to V10 (FIG. 46), an estimated charge amount QJ is calculated. Therefore, in the battery controller 30, as shown in FIG. 47, the estimated charge amount QJ of the second battery B (secondary batteries 1 to 7, 9, 10) after the first adjustment step is set to the second battery B (two It is estimated that the value is much larger than the charge amount QF (see FIG. 45) of the secondary batteries 1 to 7, 9, 10).

  Then, in the battery controller 30, among the estimated charge amounts QJ of the secondary batteries 1 to 10 after the first adjustment step, the maximum estimated charge amount QJmax (charge amount of the secondary batteries 1 and 10) and the minimum estimated charge amount QJmin ( The difference (maximum difference) ΔQJ from the charge amount of the secondary battery 8 is calculated, and if the maximum difference ΔQJ exceeds the allowable range, it is determined that the charge amount is abnormal. For this reason, even though the maximum difference ΔQF (see FIG. 45) of the charge amount QF of the secondary batteries 1 to 10 is within the allowable range (for example, within 0.2 Ah) of the battery controller 30 by the first adjustment step. Therefore, the assembled battery 50 with a controller cannot be used properly.

However, if the second battery B (secondary batteries 1 to 7, 9, 10) is charged in the first adjustment step and then left for a long time (for example, several days), the second battery B ( The battery voltages V1 to V7, V9, and V10 of the secondary batteries 1 to 7, 9, and 10) recover (decrease). Therefore, if the assembled battery 50 with a controller is used after being mounted on a hybrid vehicle or the like, the battery controller 30 will not determine abnormality. However, in this case, work efficiency is poor, and when it is desired to use the assembled battery 50 with a controller as soon as possible, the request cannot be met.
On the other hand, in the present Example 6, the assembled battery 50 with a controller can be used promptly by performing the 2nd adjustment process described below following a 1st adjustment process.

(Second adjustment step)
That is, following step M3, the process proceeds to step M4 (see FIG. 44), and both the first battery A and the second battery B (that is, all the secondary batteries 1 to 10 constituting the assembled battery 20) are As shown at 48, the battery is charged by an equal amount of electricity ΔQH. Specifically, for example, the secondary batteries 1 to 10 are charged simultaneously using the constant current charging / discharging device 80 (see FIG. 2) in a state where the secondary batteries 1 to 10 are connected in series.

  Thereby, the charge amounts of the secondary batteries 1 to 10 are increased by ΔQH, respectively, but the maximum difference ΔQG (the maximum charge amount QGmax and the minimum charge amount) of the charge amounts QG of the secondary batteries 1 to 10 after the second adjustment step. The difference in charge amount from QGmin does not vary from the maximum difference ΔQF in the charge amount QF before the second adjustment step (see FIG. 48).

  On the other hand, as shown in FIG. 49, the maximum battery voltage difference between the secondary batteries 1 to 10 after the second adjustment step can be reduced from ΔVJ to ΔVK. This is because the battery voltage (V8) of the first battery A (secondary battery 8) greatly increases due to charging in the second adjustment step, but the second battery B (secondary battery already charged in the first adjustment step (secondary battery). Even if the batteries 1 to 7, 9, 10) are charged with the same amount of electricity as the first battery A in the second adjustment step, the amount of increase in battery voltage is smaller than that of the first battery A (secondary battery 8). Because it becomes.

Therefore, when the assembled battery 50 with a controller including the assembled battery 20 that has finished the first and second adjustment steps is used in a hybrid vehicle or the like, the maximum battery voltage difference is reduced to ΔVK in the battery controller 30. Based on the battery voltages V1 to V10 (see FIG. 49), the estimated charge amount QK of the secondary batteries 1 to 10 is calculated (see FIG. 50).
Looking at the estimated charge amount QK, the maximum difference ΔQK between the maximum estimated charge amount QKmax (the estimated charge amount of the secondary batteries 1 and 10) and the minimum estimated charge amount QKmin (the estimated charge amount of the secondary battery 8) is This can be made smaller than the maximum difference ΔQJ (see FIG. 47) of the estimated charge amount QJ before the second adjustment step. Moreover, it can be smaller than the maximum difference ΔQ (see FIG. 4) of the estimated charge amount Q before adjustment, and can be within an allowable range (for example, 0.2 Ah) in the battery controller 30.

Therefore, even if the assembled battery 50 with a controller including the assembled battery 20 after the second adjustment is used by being mounted on a hybrid vehicle or the like, the battery controller 30 does not detect an abnormality in the charge amount. Therefore, the assembled battery 20 can be used appropriately.
Moreover, in the adjustment method of the sixth embodiment, it is not necessary to leave the battery pack 20 for a long time in order to reduce the battery voltage difference ΔVJ of the secondary batteries 1 to 10 after the first adjustment step. Adjustment can be completed.

  By the way, the first battery A (secondary battery 8) has a characteristic different from that of the second battery B (secondary batteries 1 to 7, 9, 10). Subsequent use (charging / discharging) tends to gradually increase the amount of charge compared to the second battery B, so the amount of charge may be larger than that of the second battery B again.

  Therefore, in the adjustment method of the sixth embodiment, as described above, in the first adjustment step, the secondary battery 5 having the smallest charge amount among the second batteries B (secondary batteries 1 to 7, 9, 10). The charge amount QFmin of 6 was made equal to the charge amount of the first battery A (secondary battery 8) (see FIG. 45). By doing in this way, the 1st battery A (secondary battery 8) is charged more than any 2nd battery B (secondary batteries 1-7, 9, 10) by subsequent use (charge / discharge). The amount of time until the amount increases, that is, the time until the estimated charge amount Q reaches the state shown in FIG. 4 can be earned longer. Thereby, the assembled battery 20 can be used appropriately over a longer period of time.

(Example 7)
Next, a seventh embodiment of the present invention will be described. The seventh embodiment is different from the fourth embodiment only in the method of adjusting the assembled battery, and the other is the same. Therefore, here, the description will focus on the parts different from the fourth embodiment, and the description of the other parts will be omitted or simplified.

FIG. 51 is a flowchart illustrating the flow of the adjustment process of the assembled battery according to the seventh embodiment.
First, similarly to Example 4, in step V1, estimated charge amounts (see FIG. 27) of the secondary batteries 101 to 110 constituting the assembled battery 120 are obtained. Then, the process proceeds to a step V2, depending on the magnitude of the estimated charge amount of the obtained secondary batteries 101-110, secondary batteries 101-110, grouped according to the first battery A and the second battery B. Also in the seventh embodiment, similarly to the fourth embodiment, the secondary batteries 101 to 107 , 109 , and 110 are referred to as the first battery A, and the secondary battery 108 is referred to as the second battery B.

(First adjustment process)
Next, the process proceeds to Step N3 (see FIG. 51), and as shown in FIG. 52, the first battery A (secondary batteries 101 to 107, 109, 110) is discharged by an equal amount of electricity to the second battery B. The charge amount of the (secondary battery 108) is determined from the charge amount range X determined from the charge amount of the first battery A after discharge (in the seventh embodiment, from the smallest charge amount among the charge amounts of the first battery A). (Within the range up to the maximum charge amount). In the seventh embodiment, as shown in FIG. 52, the charge amount QFmax of the secondary batteries 101 and 110 having the largest charge amount among the first batteries A is made equal to the charge amount of the second battery B. Specifically, the first battery A (secondary batteries 101 to 107, 109, 110) is electrically connected in series with each other using the constant current charging / discharging device 80 (see FIG. 2). Battery A (secondary batteries 101-107, 109, 110) was discharged simultaneously by ΔQ.

  52 to 57, the secondary batteries 101 to 110 are abbreviated as 1 to 10. Further, the charge amount range X is set so as to satisfy an allowable range (for example, 0.2 Ah) of the charge amount allowed in the battery controller 30. Further, as described above, ΔQ is the largest maximum estimated charge amount Qmax among the estimated charge amounts Q of the secondary batteries 101 to 110 before the first adjustment step (in the seventh embodiment, the secondary batteries 101 and 110). ) And the smallest minimum estimated charge amount Qmin (in the seventh embodiment, the charge amount of the secondary battery 8) (maximum difference) (see FIG. 27).

  Thereby, when looking at the secondary batteries 101 to 110 after the first adjustment step, as shown in FIG. 52, the maximum difference ΔQF of the charge amount QF is the charge amount of the first battery A applied before the first adjustment step. It becomes equal to the maximum difference and can be made smaller than ΔQ before the first adjustment step. That is, the difference in charge amount between the first battery A (secondary batteries 101 to 107, 109, 110) and the second battery B (secondary battery 108) can be reduced.

  However, if only the first battery A (secondary batteries 101 to 107, 109, 110) is discharged by the first adjustment step, the battery voltages V1 to 7, 9, 10 of the first battery A are temporarily changed. Decrease significantly. For this reason, as shown in FIG. 53, the maximum battery voltage difference ΔVJ of the secondary batteries 101 to 110 after the first adjustment step (the secondary battery 108 as the second battery B and the battery voltage among the first batteries A). Battery voltage difference between the secondary batteries 105 and 106 having a low value) may be larger than the maximum battery voltage difference ΔV before the first adjustment step.

  For this reason, when the assembled battery 150 with a controller including the assembled battery 120 that has completed only the first adjustment step is used by being mounted on a hybrid vehicle or the like, the battery controller 30 uses these battery voltages V1 to V10 (see FIG. 53), the estimated charge amount QJ is calculated. Therefore, in the battery controller 30, as shown in FIG. 54, the estimated charge amount QJ of the first battery A (secondary batteries 101 to 107, 109, 110) after the first adjustment step is used to charge the first battery A. The value is estimated to be much smaller than the quantity QF (see FIG. 52).

  Then, in the battery controller 30, among the estimated charge amounts QJ of the secondary batteries 101 to 110 after the first adjustment step, the maximum estimated charge amount QJmax (the estimated charge amount of the secondary battery 108) and the minimum estimated charge amount QJmin (two The difference (maximum difference) ΔQJ from the estimated charge amount of the secondary batteries 105 and 106) is calculated, and it is determined that the charge amount is abnormal if the maximum difference ΔQJ exceeds the allowable range. For this reason, even though the maximum difference ΔQF (see FIG. 52) of the charge amount QF of the secondary batteries 101 to 110 is within the allowable range of the battery controller 30 (for example, within 0.2 Ah) by the first adjustment step. Therefore, the assembled battery 50 with a controller cannot be used properly.

However, if the first battery A (secondary batteries 101 to 107, 109, 110) is discharged in the first adjustment step and then left for a long time (for example, several days), the first battery A that has temporarily decreased The battery voltages V1 to 7, 9, 10 are recovered. Therefore, if the assembled battery 150 with a controller is used after being mounted in a hybrid vehicle or the like, the battery controller 30 will not determine abnormality. However, in this case, the work efficiency is poor, and when it is desired to use the assembled battery 150 with a controller as soon as possible, the request cannot be met.
On the other hand, in the present Example 7, the assembled battery 150 with a controller can be used promptly by performing the 2nd adjustment process described below following a 1st adjustment process.

(Second adjustment step)
That is, following step N3, the process proceeds to step N4 (see FIG. 51), and both the first battery A and the second battery B (that is, all the secondary batteries 101 to 110 constituting the assembled battery 120) are As shown at 55, the same amount of electricity ΔQI is discharged. Specifically, for example, the secondary batteries 101 to 110 are simultaneously discharged by ΔQI using the constant current charging / discharging device 80 (see FIG. 2) in a state where the secondary batteries 101 to 110 are connected in series. .

  Accordingly, the charge amounts of the secondary batteries 101 to 110 are decreased by ΔQI, respectively, but the maximum difference ΔQG (the maximum charge amount QGmax and the minimum charge amount) of the charge amounts QG of the secondary batteries 101 to 110 after the second adjustment step. The charge amount difference from QGmin does not vary from the maximum difference ΔQF of the charge amount QF before the second adjustment step.

  On the other hand, as shown in FIG. 56, the maximum battery voltage difference between the secondary batteries 101 to 110 after the second adjustment step can be reduced from ΔVJ to ΔVK. This is because the battery voltage (V8) of the second battery B (secondary battery 108) is greatly reduced by the discharge in the second adjustment step, but the first battery A (secondary battery) already discharged in the first adjustment step. 101 to 107, 109, 110) is because the amount of decrease in battery voltage is smaller than that of the second battery B even if the same amount of electricity as that of the second battery B is discharged in the second adjustment step.

  Accordingly, when the assembled battery 150 with a controller including the assembled battery 120 after the first and second adjustment steps is used by being mounted on a hybrid vehicle or the like, the maximum battery voltage difference is reduced to ΔVK in the battery controller 30. Based on the battery voltages V1 to V10 (see FIG. 56), the estimated charge amount QK of the secondary batteries 101 to 110 is calculated (see FIG. 57).

  Looking at the estimated charge amount QK, as shown in FIG. 57, the maximum estimated charge amount QKmax (estimated charge amount of the secondary battery 108) and the minimum estimated charge amount QKmin (estimated charge amount of the secondary batteries 105 and 106). Can be made smaller than the maximum difference ΔQJ of the estimated charge amount QJ before the second adjustment step. Moreover, it can be smaller than the maximum difference ΔQ (see FIG. 27) of the estimated charge amount Q before adjustment, and can be within an allowable range (for example, 0.2 Ah) in the battery controller 30.

Therefore, even if the assembled battery 150 with the controller including the assembled battery 120 after the second adjustment step is used by being mounted on a hybrid vehicle or the like, the battery controller 30 may detect an abnormality in the charge amount. Therefore, the assembled battery 120 can be used appropriately.
Moreover, in the adjustment method of the seventh embodiment, in order to reduce the battery voltage difference ΔVJ between the secondary batteries 101 to 110 after the first adjustment step, it is not necessary to leave the battery pack 120 for a long time. Adjustment can be completed.

  By the way, the second battery B (secondary battery 108) is different in characteristics from the first battery A (secondary batteries 101 to 107, 109, 110). Since the amount of charge tends to be gradually smaller than that of the first battery A due to subsequent use (charge / discharge), the amount of charge may be smaller than that of the first battery A again.

  Therefore, in the adjustment method of the seventh embodiment, in the first adjustment step, the charge amount of the second battery B (secondary battery 108) is set to the value of the first battery A (secondary batteries 101 to 107, 109, 110). The charge amount QFmax of the secondary batteries 101 and 110 having the largest charge amount was made equal (see FIG. 52). By doing so, until the second battery B again has a smaller charge amount than any of the first batteries A by subsequent use (charge / discharge), that is, the estimated charge amount Q is again shown in FIG. You can earn longer time to reach the state. Thereby, the assembled battery 120 can be used appropriately over a longer period of time.

In the above, the present invention has been described with reference to the first to seventh embodiments. However, the present invention is not limited to the above-described embodiments, and it can be applied as appropriate without departing from the scope of the present invention. Nor.
For example, in Example 1, the first battery A (secondary battery 8) was discharged in step S3 (first adjustment step), but the second battery B (secondary batteries 1 to 7, 9, 10) was discharged. By charging the same amount of electricity, the amount of charge of the secondary batteries 5 and 6 with the smallest amount of charge among the second batteries B is made equal to the amount of charge of the first battery A (secondary battery 8). good.
In the first embodiment, the first battery A and the second battery B are discharged in step S4 (second adjustment step), but they may be charged by an equal amount of electricity.

In Example 2, step T4 (second battery adjustment step) was performed following step T3 (first battery adjustment step). Prior to step T3 (first battery adjustment step), Step T4 (second battery adjustment step) may be performed.
In Example 3, step U4 (first battery adjustment process) was performed following step U3 (second battery adjustment process). Prior to step U3 (second battery adjustment process), You may make it perform step U4 (adjustment process of a 1st battery).

In Example 4, the second battery B (secondary battery 108) was charged in step V3 (first adjustment step), but the first battery A (secondary batteries 101 to 107, 109, 110) was equal. The amount of electricity may be discharged so that the amount of charge of the second battery B is equal to the amount of charge of the secondary batteries 101 and 110 having the largest amount of charge among the first batteries A.
In the fourth embodiment, the first battery A and the second battery B are charged in step V4 (second adjustment step), but they may be discharged by an equal amount of electricity.

Further, in Example 5, the first battery A (secondary batteries 201 and 210) was discharged in step W3 (first adjustment step), but the second battery B (secondary batteries 202 to 209) was equalized. The amount of charge of the first battery A may be equal to the amount of charge of the secondary batteries 205 and 206 having the smallest charge amount of the second battery B.
In the fifth embodiment, the first battery A and the second battery B are discharged in step W4 (second adjustment process), but they may be charged by an equal amount of electricity.

  Moreover, in Examples 1-7, after abnormality of charge amount is detected by the battery controller 30, adjustment of the charge amount of an assembled battery (a 1st adjustment process and a 2nd adjustment process, or a 1st battery adjustment process and Although the adjustment process of the second battery is performed, the adjustment may be performed before the abnormality of the charge amount is detected. For example, for each periodic inspection of an automobile or the like, the estimated charge amount Q of the secondary battery constituting the assembled battery is inspected using the data monitor 60, and the maximum difference ΔQ of the estimated charge amount Q is within an allowable range (for example, Even if it is 0.2 Ah or less), if it is a predetermined value (for example, 0.1 Ah) or more, the amount of charge may be adjusted. This is preferable because it is possible to prevent an alarm or the like from being detected due to an abnormality in the charge amount during driving of the automobile.

It is a block diagram of assembled batteries 50, 150, 250 with a controller concerning Examples 1-7. It is explanatory drawing explaining the adjustment process of the assembled battery concerning Examples 1-5. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) before the adjustment concerning Example 1. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) before the adjustment concerning Example 1. FIG. 3 is a flowchart showing a flow of an adjustment process of an assembled battery according to Example 1; It is a graph which shows the charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 1. FIG. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 1. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 1. FIG. It is a graph which shows the charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 1. FIG. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 1. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 1. FIG. 6 is a flowchart showing a flow of an adjustment process of an assembled battery according to Example 2; It is a graph which shows the charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 1st battery concerning Example 2. FIG. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 1st battery concerning Example 2. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 1st battery concerning Example 2. FIG. It is a graph which shows the charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 2nd battery concerning Example 2. FIG. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 2nd battery concerning Example 2. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 2nd battery concerning Example 2. FIG. 10 is a flowchart showing a flow of an adjustment process of an assembled battery according to Example 3; It is a graph which shows the charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 2nd battery concerning Example 3. FIG. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 2nd battery concerning Example 3. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 2nd battery concerning Example 3. FIG. It is a graph which shows the charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 1st battery concerning Example 3. FIG. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 1st battery concerning Example 3. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the adjustment process of the 1st battery concerning Example 3. FIG. It is a graph which shows the battery voltage of the secondary batteries 101-110 (1st battery A and 2nd battery B) before the adjustment concerning Example 4. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) before the adjustment concerning Example 4. FIG. 12 is a flowchart showing a flow of an adjustment process of an assembled battery according to Example 4; It is a graph which shows the charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 4. FIG. It is a graph which shows the battery voltage of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 4. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 4. FIG. It is a graph which shows the charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 4. FIG. It is a graph which shows the battery voltage of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 4. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 4. FIG. It is a graph which shows the battery voltage of the secondary batteries 201-210 (1st battery A and 2nd battery B) before the adjustment concerning Example 5. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 201-210 (1st battery A and 2nd battery B) before the adjustment concerning Example 5. FIG. 10 is a flowchart showing a flow of an adjustment process of an assembled battery according to Example 5; 12 is a graph showing the amount of charge of secondary batteries 201 to 210 (first battery A and second battery B) after the first adjustment step according to Example 5; It is a graph which shows the battery voltage of the secondary batteries 201-210 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 5. FIG. 12 is a graph showing an estimated charge amount of secondary batteries 201 to 210 (first battery A and second battery B) after the first adjustment step according to Example 5; 12 is a graph showing the amount of charge of secondary batteries 201 to 210 (first battery A and second battery B) after the second adjustment step according to Example 5; It is a graph which shows the battery voltage of the secondary batteries 201-210 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 5. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 201-210 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 5. FIG. 10 is a flowchart showing a flow of an adjustment process of an assembled battery according to Example 6; It is a graph which shows the charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 6. FIG. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 6. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 6. FIG. It is a graph which shows the charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 6. FIG. It is a graph which shows the battery voltage of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 6. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 1-10 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 6. FIG. 10 is a flowchart showing a flow of an adjustment process of an assembled battery according to Example 7. It is a graph which shows the charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 7. FIG. It is a graph which shows the battery voltage of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 7. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 1st adjustment process concerning Example 7. FIG. It is a graph which shows the charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 7. FIG. It is a graph which shows the battery voltage of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 7. FIG. It is a graph which shows the estimated charge amount of the secondary batteries 101-110 (1st battery A and 2nd battery B) after the 2nd adjustment process concerning Example 7. FIG.

Explanation of symbols

1 to 10, 101 to 110, 201 to 210 Secondary battery 20, 120, 220 Battery pack 30 Battery controller (battery controller)
50, 150, 250 Battery pack with controller 60 Data monitor 80 Constant current charge / discharge device A First battery B Second battery

Claims (8)

Based on the amount of charge before adjustment, the secondary batteries that make up the assembled battery
One or more first batteries having a large charge amount;
When divided into the remaining one or a plurality of second batteries having a smaller charge amount than the first battery,
An assembled battery adjustment method for reducing a difference in charge between the first battery and the second battery constituting the assembled battery,
Either discharging the one or more first batteries to bring the charge amount of each of the first batteries into a charge amount range determined from the charge amount of the second battery, or
The one or more second batteries are charged by an equal amount of electricity, and the charge amount of each of the first batteries is within a charge amount range determined from the charge amount of the second battery after charging. A first adjustment step,
A method for adjusting an assembled battery, comprising: following the first adjustment step, a second adjustment step of discharging or charging both the first battery and the second battery by an equal amount of electricity. A method for adjusting an assembled battery according to claim 1,
The first adjustment step includes
A method for adjusting an assembled battery in which a charge amount of at least one of the one or more first batteries is equal to a charge amount of the second battery having the smallest charge amount. Based on the amount of charge before adjustment, the secondary batteries that make up the assembled battery
One or more first batteries having a large charge amount;
When divided into the remaining one or a plurality of second batteries having a smaller charge amount than the first battery,
An assembled battery adjustment method for reducing a difference in charge between the first battery and the second battery constituting the assembled battery,
Charging all of the one or a plurality of second batteries so that the charge amount of each of the second batteries is within a charge amount range determined from the charge amount of the first battery, or
The one or more first batteries are discharged by an equal amount of electricity, and the charge amount of each of the second batteries is within a charge amount range determined from the charge amount of the first battery after discharge. A first adjustment step,
A method for adjusting an assembled battery, comprising: following the first adjustment step, a second adjustment step of discharging or charging both the first battery and the second battery by an equal amount of electricity. A method for adjusting an assembled battery according to claim 3,
The first adjustment step includes
A method for adjusting an assembled battery in which a charge amount of at least one of the one or the plurality of second batteries is equal to a charge amount of the largest charge amount of the first batteries. Based on the amount of charge before adjustment, the secondary batteries that make up the assembled battery
One or more first batteries having a large charge amount;
When divided into the remaining one or a plurality of second batteries having a smaller charge amount than the first battery,
An assembled battery adjustment method for reducing a difference in charge between the first battery and the second battery constituting the assembled battery,
Adjusting the second battery to discharge the one or more second batteries by an equal amount of electricity;
A step of adjusting the first battery for discharging the one or more first batteries,
A first battery adjustment step in which a charge amount of the first battery is within a charge amount range determined from a charge amount of the second battery after being discharged in the adjustment step of the second battery, respectively. A method for adjusting an assembled battery. Based on the amount of charge before adjustment, the secondary batteries that make up the assembled battery
One or more first batteries having a large charge amount;
When divided into the remaining one or a plurality of second batteries having a smaller charge amount than the first battery,
An assembled battery adjustment method for reducing a difference in charge between the first battery and the second battery constituting the assembled battery,
Adjusting the second battery to charge the one or more second batteries by an equal amount of electricity;
A step of adjusting the first battery for charging the one or more first batteries,
A first battery adjustment step, wherein the charge amount of the first battery is within a charge amount range determined from the charge amount of the second battery after being charged in the adjustment step of the second battery, respectively. Adjustment method of assembled battery. A method for adjusting an assembled battery according to claim 5 or 6,
The adjustment process of the first battery includes:
A set in which the charge amount of at least one of the first batteries is equal to the charge amount of the second battery with the smallest charge amount after being discharged or charged in the adjustment step of the second battery. Battery adjustment method. An assembled battery formed by electrically connecting a plurality of secondary batteries;
A battery controller that estimates each charge amount based on each battery voltage of the plurality of secondary batteries and detects an abnormality of the plurality of secondary batteries based on each estimated charge amount. A method for adjusting an assembled battery,
Each charge amount of the plurality of secondary batteries estimated by the battery controller is set as the charge amount before the adjustment, and the plurality of secondary batteries are divided into the first battery and the second battery,
The adjustment method of the assembled battery with a controller which makes small the difference of the charge amount of the said 1st battery which makes the said assembled battery, and the said 2nd battery with the adjustment method as described in any one of Claims 1-7.

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