JP7072534B2 - Secondary battery, secondary battery control method, program and control device - Google Patents

Description

The present invention relates to a secondary battery, a method for controlling the secondary battery, a program, and a control device.

Before handing over the primary used secondary battery module to the battery manufacturer for reuse, by reading out the electrical characteristic information and usage history information of the secondary battery module and comparing it with the threshold prepared in advance, A battery information management device that grades the secondary battery module is known (see, for example, Patent Document 1).
[Prior Art Document]
[Patent Document]
[Patent Document 1] Japanese Unexamined Patent Publication No. 2011-146389

In the secondary battery module handled by the above device, the set value of BMS (Battery Management System) that controls charging / discharging does not change between the primary use destination and the reuse destination, so that the control is controlled by the set value suitable for each use destination. Was not done.

In one aspect of the invention, a secondary battery is provided. The secondary battery may include an acquisition unit that acquires input / output information related to the power input / output to / from the user. The secondary battery is provided with a determination unit that determines the second set value based on the input / output information in order to update the first set value currently set, which determines the fluctuation range of the parameter value related to electric power. May be good. The secondary battery may include a parameter control unit that controls the parameter value according to the second set value.

The input / output information is the total value of at least one of the value of the power output from the secondary battery to the user and the amount of power and the capacity of the current input / output to / from the user in a certain period, and the power. The P2P capacity (PeaktoPeak capacity), which is the difference between the peak value on the output side and the peak value on the input side, which is at least one of the quantity and the capacity, may be included.

The determination unit calculates the value of the current input from the user to the secondary battery based on the total value and the P2P capacity, and from the value of the current, the closed circuit voltage (CCV) and SOC of the secondary battery (CCV) and SOC (as parameter values) of the secondary battery. At least one of the charge rate) may be calculated.

The determination unit may determine the second set value based on the parameter value that exceeds the first set value.

The determination unit identifies the maximum value of the parameter value that exceeds the first set value, and the expected range in which at least the maximum value is added to the second set value is within the performance range preset for the secondary battery. As such, the second set value may be determined.

The determination unit may add a value obtained by multiplying the maximum value by a safety factor larger than 1 to the second set value as the expected range.

In the secondary battery, an event in which the parameter value exceeds the second expected range obtained by adding the maximum value to the second set value within a predetermined control period after starting the control of the parameter value according to the second set value. An event determination unit for determining the presence or absence may be further provided. When it is determined that there is no event within the control period, the determination unit may determine the third set value by multiplying the maximum value by a new safety factor smaller than the safety factor and larger than 1.

The event judgment unit exceeds the third expected range in which the maximum value is added to the third set value within a predetermined second control period after starting the control of the parameter value according to the third set value. The presence or absence of the second event may be determined. When it is determined that the second event exists within the second control period, it may be decided to return the third set value to the second set value.

The secondary battery determines whether or not the fluctuation range of the parameter value according to the second set value determined by the determination unit has a difference equal to or larger than a predetermined threshold value with respect to the fluctuation range of the parameter value according to the first set value. A difference determination unit for determination may be further provided. The parameter control unit may maintain control of the parameter value according to the first set value when it is determined that there is no difference.

The secondary battery may further include a mounting detection unit that detects that the secondary battery has been mounted at the destination and has begun to be used. The acquisition unit may start acquiring input / output information when it is detected that it has begun to be used.

The secondary battery is a user input for the user to adjust the upper limit value corresponding to the value of the current input from the user to the secondary battery in the fluctuation range of the parameter value by the second set value determined by the determination unit. Further units may be provided.

In one aspect of the present invention, a method for controlling a secondary battery is provided. The control method of the secondary battery may include an acquisition step of acquiring input / output information related to the power input / output to / from the user. The control method of the secondary battery is a determination stage in which the second set value is determined based on the input / output information in order to update the first set value currently set, which determines the fluctuation range of the parameter value related to electric power. May be provided. The control method of the secondary battery may include a parameter control step of controlling the parameter value according to the second set value.

In one aspect of the present invention, a program for causing a computer to execute the above-mentioned method for controlling a secondary battery is provided.

In one aspect of the invention, a control device is provided. The control device may be incorporated in the secondary battery and control the secondary battery. The control device may include an acquisition unit that acquires input / output information related to the power input / output between the secondary battery and the user to which the secondary battery is attached. It may be provided with a decision to determine the second set value based on the input / output information in order to update the first set value currently set, which defines the fluctuation range of the parameter value related to electric power. The control device may include a parameter control unit that controls the parameter value according to the second set value.

The outline of the above invention does not list all the necessary features of the present invention. A subcombination of these feature groups can also be an invention.

It is a figure for demonstrating the outline of diverting the secondary battery 100 from a primary use destination to a secondary use destination according to this embodiment. FIG. 3 is a block diagram of a secondary battery 100 that inputs and outputs electric power to and from each of the vehicle 11 and the house 13 according to the present embodiment. It is a flow chart of the control method of the secondary battery 100 by this embodiment. It is a graph for demonstrating the method of controlling the CCV of a secondary battery 100 by this embodiment. It is a figure which shows the example of the computer 1200 which can embody a plurality of aspects of this invention in whole or part.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention to which the claims are made. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention. In the drawings, the same or similar parts may be given the same reference number to omit duplicate explanations.

FIG. 1 is a diagram for explaining an outline of diverting the secondary battery 100 from a primary use destination to a secondary use destination according to the present embodiment. As shown in FIG. 1, an example of the primary use destination in this embodiment is a vehicle 11, and an example of a secondary use destination is a house 13.

The vehicle 11 is a motorcycle or a motorcycle such as an EV or an HEV, and can be driven by electricity. A secondary battery 100 can be attached to and detached from the vehicle 11. The house 13 is, for example, a detached house, and is supplied with electric power from a grid, and is also supplied with electric power from a solar panel, a stationary storage battery, or the like provided in the house 13. As the stationary storage battery of the house 13, the secondary battery 100 can be used. Automobiles and the like such as EVs and HEVs require a high output for the secondary battery 100, while the house 13 requires a high capacity for the secondary battery 100. In other words, the required performance of the secondary battery 100 differs depending on whether it is used in the vehicle 11 or in the house 13. The house 13 tends not to require a high output with respect to the secondary battery 100.

The secondary battery 100 is, for example, an all-solid-state battery, a lithium ion battery, or the like. The secondary battery 100 according to the present embodiment is primarily used in the vehicle 11 as a high-output type battery, and then reused in the house 13. The secondary battery 100 automatically sets the setting values that determine the fluctuation range of voltage, SOC, etc. so that the performance is suitable for the usage in the house 13, for example, to function as a low output and high capacity type battery. And control the voltage, SOC, etc. according to the adjusted set value. More specifically, the secondary battery 100 is used according to the state of the temperature, SOC, resistance, etc. of the secondary battery 100 within the range of the set value adjusted so as to have the performance suitable for the new usage destination. The range of voltage and SOC to be applied is adjusted at any time to control the voltage and SOC.

FIG. 2 is a block diagram of a secondary battery 100 that inputs and outputs electric power to and from each of the vehicle 11 and the house 13 according to the present embodiment. The secondary battery 100 includes a control unit 101, a storage unit 103, a mounting detection unit 105, a user input unit 109, and a battery cell group 102.

The control unit 101 includes an acquisition unit 110, a determination unit 115, and a parameter control unit 120. The control unit 101 further includes an event determination unit 125 and a difference determination unit 130.

The acquisition unit 110 acquires input / output information related to the electric power input / output to / from the user of the secondary battery 100. As an example, the acquisition unit 110 in the present embodiment may acquire the input / output information detected by the mounting detection unit 105. The acquisition unit 110 may acquire input / output information at any time or periodically. For example, when a certain period has elapsed from the start of use of the secondary battery 100 at the usage destination, the input / output for the period is input. The output information may be acquired all at once. The acquisition unit 110 outputs the acquired input / output information to the determination unit 115.

The input / output information may be information on the power input / output between the secondary battery 100 and the user, or information on the input / output current, and may be information on the input / output current, and the voltage for specifying the input / output power. It may be the information of. The input / output information is, for example, the sum of at least one of the value of the electric power output from the secondary battery 100 to the user and the electric energy amount and the current capacity of the electric power input / output to / from the user in a certain period. The value and the P2P capacity (PeaktoPeak capacity) which is the difference between the peak value on the output side and the peak value on the input side of at least one of the electric energy and the capacity may be included.

The determination unit 115 determines the second set value based on the input / output information in order to update the first set value currently set, which defines the fluctuation range of the parameter value related to the electric power. The determination unit 115 in the present embodiment determines the second set value based on the parameter value exceeding the first set value. More specifically, the determination unit 115 in the present embodiment specifies the maximum value of the parameter value that exceeds the first set value. The parameter value related to electric power may be, for example, a closed circuit voltage value (CCV: Closed Circuit Voltage), an SOC (State of Charge) value, an electric power value, a current value, a P2P capacitance value, or the like. The information indicating the first set value referred to by the determination unit may be stored in, for example, the storage unit 103. In the following description, the parameter value related to electric power may be simply referred to as a parameter value.

When the parameter value exceeds the first set value, for example, when a regenerative current is input from the user into the secondary battery 100 by regeneration, or when a power generation device such as a solar panel installed together with the secondary battery 100 is used. When the electricity generated by the use of natural energy is input into the secondary battery 100, or when a sudden power demand occurs at the usage destination and a momentary current is output from the secondary battery 100 to the usage destination. And so on. For example, when the parameter value is CCV, when the regenerative current is input into the secondary battery 100 from the user by regeneration, the CCV increases by the product of the internal resistance of the secondary battery 100 and the input regenerative current value. In some cases, the first set value may be exceeded.

With respect to the above parameter values, the determination unit 115 in the present embodiment inputs from the user to the secondary battery 100 based on the total value of at least one of the above electric energy and capacity and the P2P capacity included in the input / output information. The value of the current to be used may be calculated, and at least one of the closed circuit voltage of the secondary battery and the SOC may be calculated from the current value as a parameter value. Further, the determination unit 115 calculates at least one of the closed circuit voltage of the secondary battery 100 and the SOC as a parameter value from the value of the power output from the secondary battery 100 to the user included in the input / output information. May be good.

The determination unit 115 in the present embodiment further sets the second setting so that the expected range obtained by adding at least the above maximum value to the second set value is within the performance range preset for the secondary battery 100. Determine the value. The second set value may set a wider fluctuation range than the first set value. Adding at least the above maximum value may be intended to include, for example, adding a maximum value or adding a value larger than the maximum value, for example, a value 1.3 times the maximum value. .. Information indicating the performance range referred to by the determination unit may be stored in, for example, the storage unit 103. The determination unit 115 outputs the determined second set value to the parameter control unit 120.

Here, the performance range refers to a certain range defined by the upper limit value and the lower limit value, and as long as the secondary battery 100 is used within the performance range, the secondary battery 100 may be excessively deteriorated or may be deteriorated. It may be a range that guarantees that abnormal deterioration or an event that makes the operation unstable does not occur. Further, the expected range may match the performance range. In this case, it can be said that a margin of at least the maximum value is provided between the second set value and the performance range.

The parameter control unit 120 controls the parameter value according to the second set value, at least after the second set value is determined by the determination unit 115. That is, the parameter control unit 120 uses the parameter value to input / output the electric power stored in the battery cell group 102. Before the second set value is determined by the determination unit 115, the parameter control unit 120 may control the parameter value according to, for example, the above-mentioned first set value.

The event determination unit 125 exceeds the second expected range in which the above maximum value is added to the second set value within a predetermined control period after starting the control of the parameter value according to the second set value. Judge the presence or absence of an event. As an example, the event determination unit 125 in the present embodiment examines the transition of the parameter value within the control period with reference to the input / output information input to the determination unit 115, and the event that the parameter value exceeds the second expected range. You may decide if there is. In other words, it can be said that the event determination unit 125 determines whether or not there is an event in which the maximum value of the parameter value exceeding the fluctuation range defined by the specific set value is updated within the control period. The information indicating the second expected range referred to by the event determination unit 125 may be stored in, for example, the storage unit 103. When the information is stored in the storage unit 103, the event determination unit 125 determines the second expected range in advance by adding the above maximum value to the second set value by itself or, for example, the determination unit 115. May be. The event determination unit 125 outputs the determination result to the determination unit 115.

The difference determination unit 130 determines whether or not the fluctuation range of the parameter value by the second set value determined by the determination unit 115 has a difference equal to or larger than a predetermined threshold value with respect to the fluctuation range of the parameter value by the first set value. To judge. As an example, the difference determination unit 130 in the present embodiment examines the transition of the parameter value within the control period with reference to the input / output information input to the determination unit 115, and the fluctuation range of the parameter value by the second set value is set. It may be determined whether or not there is a difference of the threshold value or more with respect to the fluctuation range of the parameter value according to the first set value. The information indicating the threshold value referred to by the difference determination unit 130 may be stored in, for example, the storage unit 103. The difference determination unit 130 outputs the determination result to the determination unit 115.

The storage unit 103 stores a sequence, a program, or the like for controlling each configuration of the secondary battery 100. The storage unit 103 is referred to by the control unit 101.

The mounting detection unit 105 is, for example, a current sensor or a voltage sensor, and detects that the secondary battery 100 is mounted on a usage destination such as a vehicle 11 or a house 13 and has begun to be used. The mounting detection unit 105 also detects input / output information. The mounting detection unit 105 may detect the current input / output between the secondary battery 100 and the usage destination such as the vehicle 11 or the house 13, or may detect the voltage in order to specify the electric power. The mounting detection unit 105 outputs to the acquisition unit 110 the usage start information indicating that the secondary battery 100 has been mounted on the usage destination and has begun to be used. The mounting detection unit 105 also outputs the detected input / output information to the acquisition unit 110. The mounting detection unit 105 may output the detected input / output information to the acquisition unit 110 in response to the input of the command from the acquisition unit 110 that has acquired the usage start information.

The user input unit 109 adjusts the upper limit value corresponding to the value of the current input from the user to the secondary battery 100 in the fluctuation range of the parameter value by the second set value determined by the determination unit 115. It is an input part of. The user input unit 109 may be, for example, a touch panel display or a combination of a push button and a monitor, and may be capable of displaying the above upper limit value to the user.

FIG. 3 is a flow chart of a control method for the secondary battery 100 according to the present embodiment. FIG. 4 is a graph for explaining a method of controlling the CCV of the secondary battery 100 according to the present embodiment. The horizontal axis of the graph in FIG. 4 indicates time [year], and the vertical axis indicates CCV [V]. The graph shows a method of controlling CCV, which is an example of a parameter value, after the secondary battery 100 used in the primary use destination is diverted to the secondary use destination. Hereinafter, the flow shown in FIG. 3 will be described with reference to the graph shown in FIG.

As an example, the flow starts by detecting that the secondary battery 100 is attached to the secondary usage destination and starts to be used. More specifically, the acquisition unit 110 of the secondary battery 100 acquires input / output information in response to the detection by the mounting detection unit 105 that the secondary battery 100 has begun to be used at the secondary usage destination. The flow is started by starting. The flow may be started by detecting, for example, that the secondary battery 100 has been removed from the primary use destination.

In the example of FIG. 4, the secondary battery 100 is diverted to the secondary usage destination 10 years after it has been used in the primary usage destination, and has begun to be used in the secondary usage destination. Therefore, the secondary battery 100 starts acquiring input / output information related to the electric power input / output to / from the secondary usage destination 10 years after the start of use.

When the parameter control unit 120 starts to be used at the secondary usage destination, first, the parameter control unit 120 controls the parameter value according to the first setting value set at the primary usage destination (S101). Further, the acquisition unit 110 acquires input / output information related to the electric power input / output to / from the secondary user in one year, which is a certain period from the start of being used by the secondary user, and causes the storage unit 103 to acquire the input / output information. Store (same step). In the example of FIG. 4, as an example, the acquisition unit 110 controls the CCV according to the first set value when it starts to be used at the secondary user, and one year has passed since it started to be used at the secondary user, that is, When 11 years have passed since the start of use, the input / output information for the relevant year is collectively acquired.

The determination unit 115 specifies the maximum value of the parameter value that exceeds the first set value (S103). As shown in FIG. 4, the determination unit 115 identifies, as an example, MAXin, which is the maximum value of the variable CCV exceeding the input side of the first set value, that is, the upper limit of the upper side of the graph in FIG. 1 The output side of the set value, that is, MAX out, which is the maximum value exceeding the lower limit of the lower limit of the graph in FIG. 4, is specified. In addition, on the graph of FIG. 4, in order to clarify the explanation of MAXin and MAXout of CCV, an example of the transition of CCV is partially extracted and enlarged.

The determination unit 115 sets the expected range in which at least the maximum value is added to the second set value that defines the fluctuation range wider than the first set value within the performance range preset for the secondary battery 100. , The second set value is determined (S105). As an example, the determination unit 115 adds a value obtained by multiplying the maximum value by a safety factor larger than 1 to the second set value to set the expected range in order to stabilize the operation of the secondary battery 100.

As shown in FIG. 4, an example of the performance range may be a range of CCV values defined by an upper limit CCV value and a lower limit CCV value. Further, as shown in FIG. 4, as an example, the determination unit 115 sets 1.3 × MAX in and 1.3 × MAX out, which are values obtained by multiplying each of MAX in and MAX out by a safety factor of 1.3, as the second set value. The range added to may be the expected range. Further, as shown in FIG. 4, the determination unit 115 may have the same expected range as the performance range as an example.

When the secondary battery 100 determines the set value so that the expected range obtained by adding the value obtained by multiplying the maximum value of the fluctuating parameter value by the safety factor to the set value is within the performance range as in the present embodiment. Compared with the case where the set value is determined so that the range in which the maximum value of the fluctuating parameter value is added to the set value is within the performance range, the operational safety of the secondary battery 100 can be enhanced. Any numerical value may be used for the safety factor. Further, the safety factor does not have to depend on the intended use of the user.

The parameter control unit 120 updates the parameter value from the first set value to the second set value. That is, the parameter control unit 120 ends the control of the parameter value according to the first set value, and controls the parameter value according to the second set value (S107).

The event determination unit 125 exceeds the second expected range in which the above maximum value is added to the second set value within a predetermined control period after starting the control of the parameter value according to the second set value. It is determined whether or not there is an event to be performed (S109). As shown in FIG. 4, an example of the control period is the period from the start of the control of the parameter value according to the second set value 11 years after the start of use of the secondary battery 100 to the elapse of one year. May be good. As shown in FIG. 4, as an example, the event determination unit 125 has a range in which MAX in and MAX out are added to the second set value within the period from the 11th year after the start of use of the secondary battery 100 to the lapse of one year. May be the second expected range.

When the event determination unit 125 determines that there is an event in which the parameter value exceeds the second expected range within the above control period (S109: YES), the determination unit 115 sets the second set value to the first set value. It is decided to return, and it is decided to control the parameter value according to the first set value (S111), and the flow ends.

When the event determination unit 125 determines that there is no event in which the parameter value exceeds the second expected range within the above control period (S109: NO), the determination unit 115 is smaller than the above safety factor and larger than 1. The third set value is determined by multiplying the above maximum value by the new safety factor (S113). As shown in FIG. 4, as an example, the determination unit 115 of the secondary battery 100 is expected to be second by the event determination unit 125 within the period from the 11th year after the start of use of the secondary battery 100 to the lapse of one year. When it is determined that there is no event in which the parameter value exceeds the range, the third set value is determined by multiplying the above new safety factor by the maximum value. As shown in FIG. 4, as an example, the determination unit 115 has a safety factor of 1.1, which is smaller than the above-mentioned safety factor of 1.3, with respect to the third set value, which defines a wider fluctuation range than the second set value. 3 may be determined so that the range to which 1.1 × MAX in and 1.1 × MAX out, which are the values obtained by multiplying MAX in and MAX out, is the same as the above expected range.

The parameter control unit 120 controls the parameter value according to the third set value from the time when the above control period has elapsed (S115).

The event determination unit 125 sets the parameter value in the third expected range in which the above maximum value is added to the third set value within a predetermined second control period after starting the control of the parameter value according to the third set value. Determines the presence or absence of a second event that exceeds (S117). As shown in FIG. 4, an example of the second control period is the period from the start of controlling the parameter value according to the third set value 12 years after the start of use of the secondary battery 100 to the elapse of one year. There may be. As shown in FIG. 4, the event determination unit 125 of the secondary battery 100 of the present embodiment has a parameter value of a third expected range in which the above maximum value is added to the third set value within the above second control period. Determine if there is a second event that exceeds. As an example, the event determination unit 125 sets the range in which MAXin and MAXout are added to the third set value within the period from the 12th year after the start of use of the secondary battery 100 to the lapse of one year as the third expected range. May be good.

When the event determination unit 125 determines that the second event exists within the second control period (S117: YES), the determination unit 115 determines to return the third set value to the second set value, and the second It is determined to control the parameter value according to the set value (S119), and the flow ends. As an example shown in FIG. 4, the determination unit 115 of the secondary battery 100 in the present embodiment is, as an example, from the 12th year to the lapse of one year after the start of use of the secondary battery 100 by the event determination unit 125. If it is determined that there is a second event within the period, it is decided to return the third set value to the second set value.

When the event determination unit 125 determines that there is no second event within the second control period (step S117: NO), the secondary battery 100 returns to step 113 and repeats steps S113 to S117. When step S113 is repeated, as an example, the secondary battery 100 has a new safety factor smaller than the new safety factor of 1.1 and larger than 1, for example, a safety factor of 1.05, which is the maximum value. The fourth set value is determined by multiplying by. The above flow may be repeated every time a predetermined period such as one year or two years elapses for the purpose of continuously updating the set value.

As described above, the secondary battery 100 of the present embodiment acquires input / output information related to the electric power input / output to / from the user, and based on the input / output information, the parameter value related to the electric power is a parameter. Specify the maximum value for the amount exceeding the first set value that defines the fluctuation range of the value. Further, in the secondary battery 100, the expected range in which at least the above maximum value is added to the second set value that defines a fluctuation range wider than the first set value is within the performance range preset for the secondary battery 100. The second set value is determined so as to be. Then, the secondary battery 100 controls the parameter value according to the determined second set value.

For example, a battery used in an HEV has a capacity of 5 Ah, and the maximum value of the output current momentarily reaches about 300 A. On the other hand, in the battery used for stationary use, the maximum value of the current output with the same capacity is instantaneously about 5A to 10A.

According to the secondary battery 100 of the present embodiment, when the secondary battery 100 is primarily used as a high-output battery at a usage destination such as HEV and then reused for stationary use, it is used between the secondary battery 100 and the stationary usage destination. Voltage that acquires input / output information related to the input / output power and functions as a low-output, high-capacity battery so that the performance is commensurate with the usage at the stationary usage destination. It is possible to automatically adjust the set value that defines the fluctuation range such as and SOC, and control the voltage and SOC according to the adjusted set value.

For example, it is assumed that the secondary battery 100 is used in a vehicle-mounted primary use destination at V (cell / battery voltage) = 4.0 when I (current) = 300. The secondary battery 100 is used at the secondary usage destination for stationary use, I = 150 at the secondary usage destination, and the R (internal resistance) of the secondary battery 100 is used at both the primary usage destination and the secondary usage destination. The case where they are the same is taken as an example. In this case, if the relationship of CCV = I × R + V is used, CCV = 300R + V at the primary usage destination for vehicles and CCV = 150R + V at the secondary usage destination for stationary use. Therefore, when the CCV is the same for the in-vehicle use and the stationary use, the secondary battery 100 can increase the value of V. As a result, the secondary battery 100 can also improve the P2P capacity of the current and the like, and can have a performance more suitable for stationary use.

As described above, according to the secondary battery 100 of the present embodiment, when it is newly attached to an arbitrary usage destination and starts to be used, for example, the BMS used in the past usage destination is replaced or the BMS is used. There is no need to remake and reattach, and costs can be reduced. Further, according to the secondary battery 100, it is possible to adjust the set value for controlling the parameter value related to the electric power for various usages such as the primary usage destination and the secondary usage destination. It is also possible to adjust the usage according to the pack performance at the start of use at the destination. Further, according to the secondary battery 100, the set value can be constantly updated, and it is possible to deal with individual differences in usage. If the usage destination is for stationary use, various installation destinations can be considered, and the required performance differs depending on the installation destination, but it should be automatically adjusted so that the set value matches such various required performance. Can be done.

Further, according to the secondary battery 100 of the present embodiment, input / output information related to the power input / output to / from the user is acquired for several years, and the set value is gradually set based on the input / output information. When adjusting to, the set value can be set in consideration of the variation and bias of the parameter value depending on the season.

In the above embodiment, the secondary battery 100 specifies the maximum value for which the parameter value exceeds the set value based on the input / output information, and uses the maximum value, for example, at least the second set value. It was explained that various calculations and judgments are performed, such as determining the second set value so that the expected range to which the maximum value is added is within the performance range. In the secondary battery 100, instead of the maximum value, as an example of the parameter value exceeding the set value, among the average value of the amount exceeding the set value in the period and the amount of the parameter value exceeding the set value, Other values may be used, such as the largest to the average of three values.

In the above embodiment, as described in step S111 and step S119 of the flow of FIG. 3, the secondary battery 100 has the parameters within the control period after starting the control of the parameter values according to the newly set set values. The expected range in which the maximum value for which the value exceeds the past set value is added to the set value is described as returning to the past set value when there is an event in which the parameter value is exceeded. Instead of this, the secondary battery 100 maintains the newly set set value when the event occurs, and even if the parameter value is controlled according to the set value during the next predetermined control period. good.

In the above embodiment, the parameter control unit 120 of the secondary battery 100 additionally or alternatively uses the difference determination unit 130 to set the fluctuation range of the parameter value by the second set value to the parameter value by the first set value. When it is determined that there is no difference equal to or greater than a predetermined threshold value with respect to the fluctuation range of the above, the control of the parameter value according to the first set value may be maintained.

In the above embodiment, the case where the secondary battery 100 used in the primary use destination is diverted to the secondary use destination has been described. Each function in the embodiment described above can be applied to the secondary battery 100 even when it is newly attached to the primary use destination from an unused and new state. However, in this case, the above-mentioned first set value is set with respect to the required performance to the extent that it can be guaranteed that the above-mentioned maximum value does not exceed the required performance for the purpose of ensuring safety at the new primary user. It is preferably set low.

In the above embodiment, the secondary battery 100 exceeds the above-mentioned second expected range within the control period for controlling the parameter value according to the second set value, as described in steps S109 to S119 of the flow of FIG. The configuration described as a configuration in which the third set value is determined by using a new safety factor different from the safety factor used for determining the second set value depending on whether or not there is an event to be performed. In place of or in addition to this, the secondary battery 100 is set in the second setting based on the input / output information acquired within the above control period, as described in steps S101 to S107 of the flow of FIG. A new expected range is set in advance for the secondary battery 100 by specifying the maximum value of the parameter value that exceeds the value and adding at least the maximum value to the third set value that defines a wider fluctuation range than the second set value. The third set value may be determined so as to be within the set performance range.

In the above embodiment, as described in the flow of FIG. 3, the secondary battery 100 may update the first set value to the second set value and further update to the third set value. Instead of this, when the secondary battery 100 is attached to a new destination and begins to be used, the first set value is changed to the second set value as described in steps S101 to S107 of the flow of FIG. The flow may be terminated without performing the processes of steps S109 to S119 of the flow of FIG. That is, when the secondary battery 100 is attached to a new user destination and begins to be used, the set value may be updated only once while the secondary battery 100 is attached to the user destination.

In the above embodiment, the determination unit 115 of the secondary battery 100 uses the input / output information in order to update the first set value set at the present time, and is based on the parameter value exceeding the first set value. , The configuration for determining the second set value has been described. Instead of this, the determination unit 115 uses the input / output information in order to update the first set value set at the present time, for example, with the secondary battery 100 and the user within a predetermined period. One of the candidates for the destination prepared in advance based on the average value of the amount of power input / output between the two and the frequency with which the differential value of the input / output power becomes equal to or higher than a predetermined threshold. The user may be specified, and the second set value according to the specified user may be determined. Information indicating the correspondence relationship between the input / output information and the candidate of the usage destination prepared in advance, information of the second set value according to the usage destination, and the like may be stored in advance in the storage unit 103, for example.

In the above embodiment, the determination unit 115 of the secondary battery 100 is, for example, the total value of at least one of the electric energy amount and the current capacity of the electric energy input / output to / from the user, which is included in the input / output information. , As a configuration for calculating the value of the current input from the user to the secondary battery 100 based on the P2P capacity which is the difference between the peak value on the output side and the peak value on the input side of at least one of the electric energy and the capacity. explained. The configuration will be described in detail below with reference to specific examples.

For example, the determination unit 115 calculates the electric energy Wh = Wh_max-Wh_min required for the period from the maximum value (Wh_max) and the minimum value (Wh_min) of the electric energy (P2P) observed in a certain period. The determination unit 115 determines the set value SOC_max = Wh / Wh_batt × k (... (1)) based on the battery capacity Wh_batt at that time. (For example, the SOC to be operated is lowered in order to reduce deterioration. The lower limit SOC is set to SOC 0%.) At this time, the determination unit 115 determines the above k in consideration of the relationship between the SOC and the electromotive voltage. For example, if the SOC 50% voltage is V_50% and the average voltage of SOC_max ÷ 2 is V_1, then k = V_50% ÷ V_1. As described above, the determination unit 115 may be calculated simply, or may have a SOC-OCV curve as a map and calculate the average voltage of the capacitance section in detail.

In the above, the lower limit SOC is set to 0%, but if the SOC that can output the maximum value of the instantaneous output history is SOC_X%, SOC_max = SOC_X% + Wh / Wh_batt × k (… (2)) May be. When the output of the secondary user may be temporarily / instantaneously high, and if the SOC on the battery side is low, the request cannot be met (because it is difficult to output a large output instantaneously if the SOC is low). There is. Although it cannot be taken into consideration in the above equation (1), such a case can be dealt with by the above equation (2).

The control device according to another embodiment is incorporated in the secondary battery and controls the secondary battery. The control device according to the embodiment has at least the same configuration as the acquisition unit 110, the determination unit 115, and the parameter control unit 120 included in the secondary battery 100 according to the above embodiment. The control device according to the embodiment may have the same configuration as the other configurations included in the secondary battery 100 according to the above embodiment.

Various embodiments of the present invention may be described with reference to flowcharts and block diagrams, wherein the block is (1) a stage of the process in which the operation is performed or (2) a device having a role of performing the operation. May represent a section of. Specific stages and sections are implemented by dedicated circuits, programmable circuits supplied with computer-readable instructions stored on computer-readable media, and / or processors supplied with computer-readable instructions stored on computer-readable media. It's okay. Dedicated circuits may include digital and / or analog hardware circuits, and may include integrated circuits (ICs) and / or discrete circuits. A programmable circuit is a memory element such as logical AND, logical OR, logical XOR, logical NAND, logical NOR, and other logical operations, flip-flops, registers, field programmable gate arrays (FPGAs), programmable logic arrays (PLA), etc. May include reconfigurable hardware circuits, including, etc.

The computer readable medium may include any tangible device capable of storing instructions executed by the appropriate device, so that the computer readable medium having the instructions stored therein is specified in a flow chart or block diagram. It will be equipped with a product that contains instructions that can be executed to create means for performing the operation. Examples of computer-readable media may include electronic storage media, magnetic storage media, optical storage media, electromagnetic storage media, semiconductor storage media, and the like. More specific examples of computer-readable media include floppy (registered trademark) disks, diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), Electrically erasable programmable read-only memory (EEPROM), static random access memory (SRAM), compact disc read-only memory (CD-ROM), digital versatile disc (DVD), Blu-ray (RTM) disc, memory stick, integrated A circuit card or the like may be included.

Computer-readable instructions are assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state-setting data, or object-oriented programming such as Smalltalk, JAVA®, C ++, etc. Includes either source code or object code written in any combination of one or more programming languages, including languages, and traditional procedural programming languages such as the "C" programming language or similar programming languages. good.

Computer-readable instructions are used locally or to a local area network (LAN), wide area network (WAN) such as the Internet, to a general purpose computer, a special purpose computer, or the processor or programmable circuit of another programmable data processing device. ) May execute computer-readable instructions to create means for performing the operations specified in the flowchart or block diagram. Examples of processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers, and the like.

FIG. 5 shows an example of a computer 1200 in which a plurality of aspects of the present invention can be embodied in whole or in part. The program installed on the computer 1200 causes the computer 1200 to function as an operation associated with the device according to an embodiment of the present invention or as one or more "parts" of the device, or the operation or the one or more "parts". A unit can be run and / or a computer 1200 can be run a process according to an embodiment of the invention or a step in the process. Such a program may be executed by the CPU 1212 to cause the computer 1200 to perform a specific operation associated with some or all of the blocks of the flowcharts and block diagrams described herein.

The computer 1200 according to this embodiment includes a CPU 1212, a RAM 1214, a graphic controller 1216, and a display device 1218, which are interconnected by a host controller 1210. The computer 1200 also includes input / output units such as a communication interface 1222, a hard disk drive 1224, a DVD-ROM drive 1226, and an IC card drive, which are connected to the host controller 1210 via the input / output controller 1220. The computer also includes legacy input / output units such as the ROM 1230 and keyboard 1242, which are connected to the input / output controller 1220 via the input / output chip 1240.

The CPU 1212 operates according to the programs stored in the ROM 1230 and the RAM 1214, thereby controlling each unit. The graphic controller 1216 acquires image data generated by the CPU 1212 in a frame buffer or the like provided in the RAM 1214 or the graphic controller 1216 itself, and displays the image data on the display device 1218.

The communication interface 1222 communicates with other electronic devices via the network. The hard disk drive 1224 stores programs and data used by the CPU 1212 in the computer 1200. The DVD-ROM drive 1226 reads the program or data from the DVD-ROM 1201 and provides the program or data to the hard disk drive 1224 via the RAM 1214. The IC card drive reads the program and data from the IC card and / or writes the program and data to the IC card.

The ROM 1230 internally stores a boot program or the like executed by the computer 1200 at the time of activation, and / or a program depending on the hardware of the computer 1200. The input / output chip 1240 may also connect various input / output units to the input / output controller 1220 via a parallel port, a serial port, a keyboard port, a mouse port, and the like.

The program is provided by a computer-readable storage medium such as a DVD-ROM 1201 or an IC card. The program is read from a computer-readable storage medium, installed in a hard disk drive 1224, RAM1214, or ROM1230, which is also an example of a computer-readable storage medium, and executed by the CPU 1212. The information processing described in these programs is read by the computer 1200 and provides a link between the program and the various types of hardware resources described above. The device or method may be configured to implement the operation or processing of information in accordance with the use of the computer 1200.

For example, when communication is executed between the computer 1200 and an external device, the CPU 1212 executes a communication program loaded in the RAM 1214, and performs communication processing with respect to the communication interface 1222 based on the processing described in the communication program. You may order. Under the control of the CPU 1212, the communication interface 1222 reads and reads transmission data stored in a transmission buffer area provided in a recording medium such as a RAM 1214, a hard disk drive 1224, a DVD-ROM 1201, or an IC card. The data is transmitted to the network, or the received data received from the network is written to the reception buffer area or the like provided on the recording medium.

Further, the CPU 1212 makes the RAM 1214 read all or necessary parts of the file or the database stored in the external recording medium such as the hard disk drive 1224, the DVD-ROM drive 1226 (DVD-ROM1201), and the IC card. Various types of processing may be performed on the data on the RAM 1214. The CPU 1212 may then write back the processed data to an external recording medium.

Various types of information, such as various types of programs, data, tables, and databases, may be stored on recording media for information processing. The CPU 1212 describes various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, and information retrieval described in various parts of the present disclosure with respect to the data read from the RAM 1214. Various types of processing may be performed, including / replacement, etc., and the results are written back to the RAM 1214. Further, the CPU 1212 may search for information in a file, database, or the like in the recording medium. For example, when a plurality of entries each having an attribute value of the first attribute associated with the attribute value of the second attribute are stored in the recording medium, the CPU 1212 is the first of the plurality of entries. The attribute value of the attribute of is searched for the entry that matches the specified condition, the attribute value of the second attribute stored in the entry is read, and the attribute value of the second attribute is changed to the first attribute that satisfies the predetermined condition. You may get the attribute value of the associated second attribute.

The program or software module according to the above description may be stored in a computer-readable storage medium on or near the computer 1200. Further, a recording medium such as a hard disk or RAM provided in a dedicated communication network or a server system connected to the Internet can be used as a computer-readable storage medium, whereby the program can be sent to the computer 1200 via the network. offer.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. Further, to the extent that there is no technical contradiction, the matters described for the specific embodiment can be applied to other embodiments. Further, each component may have the same characteristics as other components having the same name but different reference numerals. It is clear from the description of the claims that the form with such changes or improvements may be included in the technical scope of the present invention.

The order of execution of each process such as operation, procedure, step, and step in the apparatus, system, program, and method shown in the claims, specification, and drawings is particularly "before" and "prior to". It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Even if the scope of claims, the specification, and the operation flow in the drawings are explained using "first", "next", etc. for convenience, it means that it is essential to carry out in this order. It's not a thing.

11 Vehicles, 13 Houses, 100 Secondary batteries, 101 Control unit, 102 Battery cell group, 103 Storage unit, 105 Mounting detection unit, 109 User input unit, 110 Acquisition unit, 115 Determination unit, 120 Parameter control unit, 125 Event judgment Unit, 130 Difference Judgment Unit, 1200 Computer, 1201 DVD-ROM, 1210 Host Controller, 1212 CPU, 1214 RAM, 1216 Graphic Controller, 1218 Display Device, 1220 I / O Controller, 1222 Communication Interface, 1224 Hard Disk Drive, 1226 DVD-ROM Drive, 1230 ROM, 1240 I / O chip, 1242 keyboard

Claims (13)

It ’s a secondary battery,
A detector that detects input / output information related to the power input / output between the secondary battery and the user to which the secondary battery is attached, and
An acquisition unit that acquires the detected input / output information ,
The fluctuation range of at least one of the closed circuit voltage value (CCV), SOC (charge rate) value, power value, and current value input / output between the secondary battery and the user is the secondary. Regarding the setting value to set for the battery
The new input obtained by attaching the secondary battery to the new usage destination so that the performance of the secondary battery is commensurate with the usage at the new usage destination different from the usage destination. The parameter value is calculated from the output information, and the second set value to be used in the new user is based on the maximum value of the parameter value in which the secondary battery exceeds the first set value used in the user. And the decision-making part that decides
A parameter control unit that controls the parameter value so that the parameter value fluctuates within the fluctuation range defined by the second set value.
A secondary battery equipped with. The input / output information is the sum of at least one of the value of the electric power output from the secondary battery to the user and the electric energy amount and the current capacity of the electric power input / output to / from the user in a certain period. The secondary battery according to claim 1, further comprising a value and a P2P capacity (PeaktoPeak capacity) which is a difference between the power amount and the peak value on the output side and the peak value on the input side of at least one of the capacities. The determination unit calculates the value of the current input from the user to the secondary battery based on the total value and the P2P capacity, and from the current value, the closed circuit voltage value (as the parameter value) ( The secondary battery according to claim 2, wherein at least one of the CCV) and the SOC (charge rate) values is calculated. The determination unit specifies the maximum value, and the expected range in which at least the maximum value is added to the second set value is within the performance range preset for the secondary battery. 2. The secondary battery according to any one of claims 1 to 3 for determining a set value. The determination unit adds a value obtained by multiplying the maximum value by a safety factor larger than 1 to the second set value to obtain the expected range.
The secondary battery according to claim 4 . An event in which the parameter value exceeds the second expected range in which the maximum value is added to the second set value within a predetermined control period after the control of the parameter value according to the second set value is started. Further equipped with an event judgment unit to judge the presence or absence,
When it is determined that the event does not occur within the control period, the determination unit determines the third set value by multiplying the maximum value by a new safety factor smaller than the safety factor and larger than 1. do,
The secondary battery according to claim 5 . The event determination unit is within a predetermined second control period after starting to control the parameter value so that the parameter value fluctuates within the fluctuation range defined by the third set value . It is determined whether or not there is a second event in which the parameter value exceeds the third expected range in which the maximum value is added to the third set value.
2. The second item according to claim 6 , wherein the determination unit determines to return the third set value to the second set value when it is determined that the second event exists within the second control period. Next battery. Whether or not the fluctuation range of the parameter value according to the second set value determined by the determination unit has a difference equal to or larger than a predetermined threshold value with respect to the fluctuation range of the parameter value according to the first set value. Further equipped with a difference judgment unit for judgment,
The parameter control unit maintains that the parameter value is controlled so that the parameter value fluctuates within the fluctuation range defined by the first set value when it is determined that the parameter value does not have the difference. ,
The secondary battery according to any one of claims 1 to 7 . The detection unit further detects that the secondary battery has been attached to the destination and has begun to be used .
The acquisition unit starts acquiring the input / output information in response to the detection that it has begun to be used.
The secondary battery according to any one of claims 1 to 8 . In order for the user to adjust the upper limit value corresponding to the value of the current input from the new user to the secondary battery in the fluctuation range of the parameter value according to the second set value determined by the determination unit. The secondary battery according to any one of claims 1 to 9 , further comprising a user input unit of the above. It is a control method for secondary batteries.
A detection step for detecting input / output information related to electric power input / output between the secondary battery and the user to which the secondary battery is attached, and
The acquisition stage for acquiring the detected input / output information and
The fluctuation range of at least one of the closed circuit voltage value (CCV), SOC (charge rate) value, power value, and current value input / output between the secondary battery and the user is the secondary. Regarding the setting value to set for the battery
The new input obtained by attaching the secondary battery to the new usage destination so that the performance of the secondary battery is commensurate with the usage at the new usage destination different from the usage destination. The parameter value is calculated from the output information, and the second set value to be used in the new user is based on the maximum value of the parameter value in which the secondary battery exceeds the first set value used in the user. And the decision stage to decide
A parameter control step that controls the parameter value so that the parameter value fluctuates within the fluctuation range defined by the second set value.
A control method that comprises. A program for causing a computer to execute the control method according to claim 11 . A control device incorporated in a secondary battery to control the secondary battery.
An acquisition unit that acquires input / output information related to the power input / output between the secondary battery and the usage destination to which the secondary battery is attached , which is detected externally, from the outside .
The fluctuation range of at least one of the closed circuit voltage value (CCV), SOC (charge rate) value, power value, and current value input / output between the secondary battery and the user is the secondary. Regarding the setting value to set for the battery
The new input obtained by attaching the secondary battery to the new usage destination so that the performance of the secondary battery is commensurate with the usage at the new usage destination different from the usage destination. The parameter value is calculated from the output information, and the second set value to be used in the new user is based on the maximum value of the parameter value in which the secondary battery exceeds the first set value used in the user. And the decision-making part that decides
A parameter control unit that controls the parameter value so that the parameter value fluctuates within the fluctuation range defined by the second set value.
A control device equipped with.

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