WO2014077560A1

WO2014077560A1 - Apparatus and method for controlling battery output

Info

Publication number: WO2014077560A1
Application number: PCT/KR2013/010239
Authority: WO
Inventors: 양기동; 장시영; 이성은; 이병은; 허진혁
Original assignee: 에스케이이노베이션 주식회사
Priority date: 2012-11-15
Filing date: 2013-11-12
Publication date: 2014-05-22
Also published as: KR101907697B1; KR20140065530A

Abstract

According to one aspect of the present invention, an apparatus for controlling a battery output includes: a maximum current value calculating unit calculating the maximum value of a current that a battery can output; a reference current value calculating unit calculating a reference current value that does not substantially affect battery deterioration; a current value correction unit correcting the reference current value using parameters including the internal resistance of the battery; a use amount calculating unit measuring a current value outputted from the battery and calculating the actual amount of the current that is actually used; an accumulated current amount calculating unit measuring and outputting a reference accumulated current amount that is accumulated inside the battery using the reference current value; and an output value determining unit comparing the actual current amount outputted from the use amount calculating unit with the reference accumulated current amount outputted from the accumulated current amount calculating unit and selecting the maximum current value or the reference current value as the maximum output value. According to the present invention, battery output control is optimized by correcting the reference current value using internal parameters such as state of charge (SOC), internal resistance, or a diagnosis state and determining an output current value using a current amount used by the battery or a current amount accumulated in the battery.

Description

Battery output control device and method

[Cross References of Related Applications]

This application claims priority to Korean Patent Application No. 10-2012-0129577, filed November 15, 2012, the contents of which are incorporated by reference in their entirety for reference.

The present invention relates to an apparatus and method for controlling the output of the battery, and more particularly to an apparatus and method for controlling the output of the battery using the amount of current actually used by the battery or the amount of current accumulated in the battery.

Recently, much research has been focused on the development of an electric vehicle or a hybrid vehicle in order to replace a vehicle using an internal combustion engine using gasoline or heavy oil as a main fuel. In addition, many researches have been conducted on high-output secondary batteries using non-aqueous electrolytes having high energy density.

Electric vehicles are in the spotlight as next-generation vehicles to replace internal combustion vehicles because they do not have exhaust gas because they use a battery formed of a pack of a plurality of secondary batteries capable of charging and discharging.

The battery for an electric vehicle as described above is inherently affected by the external environment in which the battery is used due to the intrinsic nature of the electrochemical reaction, and the intrinsic electrochemical characteristics of the battery may change rapidly depending on the external environment in which the battery is exposed.

In addition, since a battery pack performs alternating charging and discharging of several to several dozen secondary batteries, it is necessary to effectively control such charging and discharging to prevent deterioration of the battery and to manage the battery to maintain proper operation. do.

On the other hand, although the battery has a maximum output available in consideration of various factors, the battery may be greatly deteriorated when it is used beyond this maximum output or repeated for a long time.

Therefore, in order to stably operate the battery and to maximize the normal driving of the battery and to prevent the deterioration of the life of the battery, there is a need to limit the output of the battery.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) Domestic Patent Publication No. 2007-0047453

The present invention has been devised to solve the above problems or necessities, and sets a reference current value having little influence on the deterioration of the battery in consideration of various factors so that the battery is not used beyond the maximum usable power. It is an object of the present invention to provide an apparatus and method for effectively controlling the output of a battery.

In addition, an object of the present invention is to adaptively control the maximum output value or the reference current value in consideration of the amount of current actually used by the battery and / or the amount of current accumulated in the battery.

Battery output control apparatus according to an embodiment of the present invention for achieving the above object, the maximum current value calculation unit for calculating the maximum current value that the battery can output; A reference current value calculator configured to calculate a reference current value that does not substantially affect battery deterioration; A current value corrector for correcting the reference current value using parameters including an internal resistance of the battery; A usage calculation unit measuring a current value calculated from the battery and calculating an actual amount of current used; A cumulative current amount calculating unit configured to measure and output a reference cumulative current amount accumulated in the battery using the reference current value; And an output value determiner for comparing the actual current amount output from the usage amount calculator with the reference accumulated current amount output from the accumulated current amount calculator, and selecting a final output value from a maximum current value and a reference current value.

In addition, the maximum current value calculator of the device of the present invention is further characterized by calculating the maximum current value that the battery can output until a predetermined sample time.

The cumulative current amount calculating unit of the device of the present invention may further calculate a reference cumulative current amount that can accumulate in the battery during the sample time using the maximum current value.

In addition, the cumulative current amount calculating unit of the device of the present invention is characterized by calculating the reference cumulative current amount differently depending on whether the battery is in a charged state or a discharged state.

In addition, the output value determining unit of the device of the present invention compares the accumulated current amount A during the predetermined sample time with the actual amount B accumulated in the battery and compares the output current value of the battery with the maximum current value or the reference value. It is characterized by determining the current value.

The output value determining unit of the device of the present invention is further characterized by determining the state of the battery according to the ratio of the accumulated current amount A during the predetermined sample time and the actual amount of current B accumulated in the battery.

Further, the output value determining unit of the apparatus of the present invention sets the output current value of the battery to the maximum when the actual cumulative current amount B becomes less than or equal to a first predetermined value of the accumulated current amount A during the predetermined sample time. It is characterized by determining the current value.

Further, the first predetermined value of the device of the present invention is characterized in that it is any value between 2 and 10%.

Further, the output value determining unit of the device of the present invention determines the output current value of the battery as the maximum current value when determining that the state of the battery is a normal state and the state of the battery is a continuous state. Is determined by the reference current value.

Further, the output value determining section of the apparatus of the present invention is in a continuous state when the actual accumulated current amount B becomes equal to or greater than a second predetermined value of the accumulated current amount A during the predetermined sample time in a normal state. change to a continuous state and determine the output current value of the battery as the reference current value.

Further, the second predetermined value of the device of the present invention is characterized in that it is any value between 90 and 98%.

Further, the output value determining unit of the present invention is in a normal state when the actual cumulative current amount B is less than or equal to a first predetermined value of the cumulative current amount A during the predetermined sample time in a continuous state. state) and the output current value of the battery is determined as the maximum current value.

In addition, the output value determination unit of the device of the present invention is characterized in that it determines the output current value of the battery periodically every predetermined time unit.

On the other hand, the battery output control method according to another embodiment of the present invention, the step of calculating the maximum current value that the battery can output for a predetermined sample time, the reference current value that does not substantially affect battery deterioration Correcting the reference current value using parameters including the internal resistance, voltage, and diagnostic state of the battery; and determining the output current value of the battery using the actual amount of current accumulated in the battery. It features.

In addition, the method further includes measuring the amount of current accumulated in the battery.

The method further includes calculating a reference cumulative current amount that can accumulate in the battery during the sample time using the maximum current value.

In the calculating of the reference cumulative current amount of the method of the present invention, the reference cumulative current amount is calculated differently according to whether the battery is in a charged state or a discharged state.

In addition, the method further includes comparing the accumulated current amount A during the predetermined sample time with the actual amount B accumulated in the battery.

The method further includes determining the state of the battery according to the ratio of the accumulated current amount A during the predetermined sample time to the actual amount of current B accumulated in the battery.

Further, the determining of the output current value of the battery of the method of the present invention may include determining that the actual cumulative current amount B is equal to or less than a first predetermined value of the cumulative current amount A during the predetermined sample time. The output current value of is determined as the maximum current value.

Further, the first predetermined value of the method of the invention is characterized in that it is any value between 2 and 10%.

The determining of the output current value of the battery of the method of the present invention further includes determining the output current value of the battery as the maximum current value when determining that the state of the battery is a normal state. When it is determined that the state is a continuous state, the reference current value is determined.

In addition, the output value determining unit of the present invention is a continuous state when the actual cumulative current amount B becomes more than a second predetermined value of the cumulative current amount A during the predetermined sample time in a normal state. state) and the output current value of the battery is determined as the reference current value.

Further, the second predetermined value of the method of the present invention is characterized in that it is any value between 90 and 98%.

According to the battery output control apparatus or method according to the present invention, even if the battery is used continuously without exceeding the maximum output that can be used, it is used as a reference current value that has little effect on battery deterioration, thereby preventing deterioration of the battery and lifespan Can be extended.

In addition, it is possible to periodically check and adjust the effect of the reference current value on the battery deterioration by correcting it using internal parameters such as SOC, diagnostic status, and internal resistance according to the reference current value. By determining the output current value of the battery using the accumulated current amount therein, there is an advantage in that the reference current value optimized for the actual state of the battery can be presented.

In addition, when the battery is in a stable state, the battery output efficiency is increased by repeating the process of increasing the battery output efficiency by periodically returning the output current value to the reference current value and recovering it back to the maximum output value. It can be used as an output value to minimize the risk of battery deterioration and shortened life.

The following drawings attached to the present specification are shown by way of example for the purpose of illustrating the technical idea of the present invention, the technical spirit of the present invention together with the specific details of the invention to be described later easily It's just to make it understandable. Therefore, the technical idea of the present invention should not be construed as being limited to the embodiments illustrated in the drawings.

1 is a block diagram illustrating an apparatus for controlling a battery output as an example of the present invention.

2 is a flowchart illustrating a method of controlling battery output in consideration of battery usage as an example of the present invention.

3 is a flowchart illustrating a method of controlling a battery output in consideration of a cumulative current amount of a battery during charging as another example of the present invention.

4 is a flowchart illustrating a method of controlling a battery output in consideration of a cumulative amount of battery current during discharge as another example of the present invention.

5 is a graph showing a cumulative current amount reference value during a sample time to illustrate an example of the present invention.

FIG. 6 is a graph showing the amount of current accumulated in an actual battery when the battery is charged to explain an example of the present invention.

7 is a graph showing an amount of current accumulated in an actual battery when the battery is discharged to explain an example of the present invention.

8 is a graph schematically illustrating a change in output of a battery over time according to an example of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the details of the present invention. DETAILED DESCRIPTION Exemplary embodiments may be described by way of example in order to describe the contents of the present invention, and the exemplary embodiments to be described below are only described by reference in order to specifically describe the spirit of the present invention. It cannot be the same as the technical idea of this invention, Therefore, the technical idea of this invention should not be limitedly interpreted by the embodiment and the protection scope described in this claim cannot be interpreted limited to the embodiment.

1 is an example of a battery output control apparatus for implementing the technical spirit of the present invention.

The battery output control apparatus 100 may include a maximum current value calculator 110, a reference current value calculator 120, a usage amount calculator 130, an output value determiner 140, and a cumulative current amount calculator 150. Can be. Each of the above parts is only divided into modules in order to subdivide the functions for implementing the technical idea of the present invention, and various modifications are possible, such as some or all of the above functions can be integrated and implemented in a specific module or device. It does not necessarily mean that a specific part is necessary.

The maximum current value calculator 110 is a part for calculating the maximum output value that can be produced by the battery. It is very important to calculate the maximum output value and operate the battery below the maximum output value if the battery output exceeds the maximum output capacity that the battery can accept. The maximum current value varies according to the type of battery, temperature, state of charge (SOC), internal resistance (IR), diagnostic state (Diagnosis), etc., and the maximum current value of the battery is calculated in various ways in consideration of the above variables. This is possible and is known in the art. This may be known from experiments, and the maximum current value for various variables may be known or provided by the battery manufacturer in a manual.

The reference current value calculator 120 is a part for calculating an output calculation value that can be stably generated within a range not exceeding the maximum output of the battery. Ideally, if the battery continuously outputs the reference value, it may be regarded as a value that does not affect battery deterioration at all. However, like the maximum output value of the battery, the reference current value also actually varies according to the temperature, SOC, internal resistance, time, etc. of the battery. Therefore, it is necessary to periodically reset and correct the reference value in consideration of the above variables.

Accordingly, the reference current value calculator 120 may perform a function of correcting the reference value by considering the variables such as the temperature of the battery, SOC, internal resistance, and time. The part for calculating the reference current value and the part for correcting the reference current value in the reference current value calculation unit 120 may be separated into modules or may be integrated and implemented in one module. As well as all within the scope of the technical idea of the present invention.

The usage calculator 130 may measure the current value calculated by the battery, measure the output current value at the previous cycle every cycle, store it in the DB, and provide the data to the output value determiner 140. The output value of the battery can generally be measured as a current value.

In addition, the cumulative current amount calculating unit 150 calculates a cumulative current amount by measuring a current value accumulated in the battery using a reference current value during charging and discharging of the battery. The calculated cumulative current amount may be provided to the output value determiner 140 and used to determine the final output value. The usage calculation unit 130 and the cumulative current amount calculation unit 150 may be integrated and managed independently in one module, or may be operated independently. Information about the accumulated current value is provided to the output value determiner 140 and used to determine the output value.

The output value determiner 140 obtains information only from the usage amount calculator 130 and the accumulated current amount calculator 150 to determine the output value.

That is, the final output value may be determined as one of the maximum current value and the reference current value by comparing the current accumulated in the battery with the reference accumulated current, and this function will be described below in detail with reference to the accompanying drawings.

The reference current value calculator 120 may periodically calculate and correct the reference current value, and the output value determiner 140 may periodically determine the output value, and for example, calculates, corrects, and outputs every 10 seconds. You can repeat it.

In order to prevent the battery from deteriorating, it is necessary to obtain the maximum output value of the battery, that is, the maximum current value, and the maximum current value is the temperature, time, state of charge (SOC), internal resistance (IR), and voltage (V) of the battery. ), And diagnosis (Diagnosis). The above information may be obtained through experiments or related information may be obtained through a conventionally known maximum output value calculation method (S200).

If the maximum output value information is secured, the reference current value that the battery can stably calculate is calculated to be actually output.The reference current value, like the maximum output value, varies according to variables such as temperature and SOC, so it needs to be calibrated over time. S300). That is, the reference current value is corrected using SOC, time, internal resistance IR, and the like as variables. Such correction may be performed periodically in predetermined units.

For the purpose of comparing the output of the battery to be described later, that is, the amount of usage and the accumulated current, the SOC, the maximum voltage, and the internal resistance (IR) of the battery may be regarded as internal parameters. It can be followed by various methods known in the art. All such methods are included in the method for implementing the technical idea of the present invention and can be expressed as a function as follows.

I _ref (n) = F (SOC, T, IR) (n = 0,1,2 ...)

After the reference current value is corrected using the internal parameter (S300), the final output value may be determined in consideration of the actual amount of current output by the battery (S400).

The reference value can be viewed as the minimum output current value that does not harm the battery by minimizing the deterioration of the battery, and when outputting only the reference value at all times may cause a problem of low battery utilization efficiency. Therefore, in practice, the output value of the battery is periodically outputted as a maximum output value for a predetermined time, and then outputted as a reference value for a predetermined time. That is, when the battery is stabilized while outputting to the reference value, the output may be restored to the maximum output value.

Determining the final output value in consideration of the actual amount of current used (S400) is the maximum output when the battery outputs the current value less than the reference current value corrected for more than a predetermined time by obtaining information about the actual amount of current used by the battery The output current value can be determined by the current value.

The predetermined time may be set to a minimum time that can prevent battery deterioration through experiments, or may be modified or modified in consideration of various design issues.

As a result, the final output value may be determined as the maximum output value or the reference value in consideration of the amount of current used by the battery in actual operation, thereby presenting an adaptively optimized output current value according to the battery operation.

The amount of current accumulated in the battery is then connected to the output current of the battery and is a key factor in determining how much the output current of the battery should be determined. Therefore, the final output value may be determined using the amount of accumulated current in the battery. Knowing the total amount of current and accumulated current of the battery, the current of the battery can be known from the accumulated current of the battery, and various types of modifications are possible. In addition, it is a matter of course that the final current value can be determined using both the actual amount of current used in the battery and the amount of current accumulated in the battery.

For convenience of explanation, assume an initialization state of the battery (S510). That is, the battery is in an initial state in which the state of the battery is normal and the amount of current accumulated in the battery is zero. For convenience, the actual amount of current accumulated in the battery is represented by C_Box, and C_Box (0) = 0 in the initialization state.

After increasing the calculation period (S520), the maximum current value that can be output by the battery for a predetermined sample time (T_ _sample ) in consideration of the calculation method of the maximum current value and the reference current value of the battery described in S300 of FIG. (I _max ) and a reference current value I _ref that hardly affects the deterioration of the battery even when a current is continuously flowed without a time limit are calculated (S530).

As described above, the maximum current value and the reference current value may be expressed as a function using the SOC, time T, internal resistance IR, voltage V, and diagnosis state of the battery. That is, in step S530, the reference current value is firstly corrected using internal parameters including SOC, T, IR, and the like. Correcting the reference current value using the above internal parameters is not limited to any conventionally known method.

If the reference value of the accumulated current amount that can be used during the sample time T_ _sample is Box (n), it can flow up to the maximum current value, but since it flows above the reference current value, the accumulated current amount is expressed as S540. That is, multiplying the sample time by the difference value between the maximum current value and the reference current value becomes the cumulative current amount reference value.

Thereafter, it is determined whether the current drawn into the battery is greater than zero or not (S550).

If C_Box (n) is represented as the amount of current accumulated in the battery according to actual time to contrast with the accumulated current amount reference value, C_Box (n) is derived differently depending on whether the incoming current is greater than zero, as shown in S560 and S570. Can be. That is, if the amount of current I (n) drawn is greater than zero, the amount of current accumulated in the battery in the immediately preceding cycle is obtained by subtracting the reference current value from I (n) and multiplying the elapsed time T by C_Box (n− C_Box (n) may be calculated using the sum of 1)) (S560). On the other hand, if I (n) is not greater than 0, C_Box (n) is obtained by subtracting the amount of current accumulated in the battery (C_Box (n-1)) from the current period multiplied by the reference current value times elapsed time (T). It can be calculated (S570).

Thereafter, a process of comparing the accumulated current amount reference value during the sample time with the amount of current accumulated in the actual battery may be performed. For example, when the amount of current accumulated in the actual battery exceeds 95% of the cumulative current amount reference value (S580), it may be assumed that the amount of current accumulation is excessive. Here, the ratio is set at 95%, but is not limited thereto, and any ratio between 90 and 98% may be selected. In addition, when the battery is in the continuous state in the previous period, even when the actual accumulated current amount exceeds only 5% of the accumulated current amount reference value (S590), the current accumulation amount may be regarded as an excessive state. In this case, the ratio is 5%, but the present invention is not limited thereto, and any ratio between 2 and 10% may be selected. In this case, the amount of current accumulation that can be viewed as the battery is continuous. Since there are many, the final output current value can be adjusted to be the reference current value (S610).

On the other hand, even if the battery is in a continuous state, if the actual accumulated current amount is less than 5% of the accumulated current amount reference value, it can be regarded as a normal state and the final output current value can be adjusted to the maximum current value (S620). Here, the ratio is set to 5%, but is not limited thereto, and any ratio may be selected from 2 to 10%.

As such, when the current amount accumulated in the battery is compared with the accumulated current amount reference value during the sample time, and the ratio thereof is checked, the state of the battery can be known. According to the state of the battery (S600), when the battery is in a normal state, The output may be restored to the maximum output value (S610), and if the battery is still in an unstable continuous state, maintaining the output of the battery at the reference current value (S620) may be beneficial to prevent deterioration of the battery. Thereafter, the calculation period may be increased to repeat the reference current value correction (S630).

As described above will be described for illustrative purposes only, various modifications are possible within the scope for implementing the technical idea of the present invention. For example, when the actual accumulated current amount exceeds 85% of the accumulated current amount reference value, the battery may be viewed as unstable and may be implemented to correct the reference value. Any other modification may be made.

The method of controlling the battery output at the time of discharge is similar to the method of controlling at the time of charging. That is, steps S710, S720, S730, S740, S780, S790, S800, S810, and S820 during discharge correspond to S510, S520, S530, S540, S580, S590, S600, S610, and S620 during charging. As it can be seen by referring to the description of the part, the description is omitted here.

Depending on whether or not the current drawn into the battery during discharge is less than zero (S750), C_Box (n), which is the amount of current actually accumulated in the battery, may be calculated differently. That is, if the amount of current I (n) drawn is less than 0, the amount of current accumulated in the battery in the previous period is subtracted from I (n) ² by the square of the reference current value and multiplied by the elapsed time T. C_Box (n) may be calculated based on the sum of C_Box (n-1)) (S760). On the other hand, if I (n) is not less than 0, C_Box is obtained by subtracting the current value C_Box (n-1) accumulated in the battery in the previous cycle from the square of the reference current value times elapsed time T. (n) may be calculated (S770).

Thereafter, the step of determining the final output current value of the battery as the maximum current value or the reference current value by comparing the accumulated current amount accumulated in the battery with the accumulated current amount reference value during the sample time is the same as that of charging, and thus the description is omitted. do.

Hereinafter, a method of determining the final output current value using the cumulative current amount of the battery will be described with reference to FIGS. 5 to 8.

Referring to S540 of FIG. 3 and S740 of FIG. 4, the amount of current accumulated in the battery during the sample time corresponds to the region shown in FIG. 5, and the amount of current that may accumulate in the battery when the reference current value is output. Therefore, it can be seen as a reference value of the cumulative current amount.

If the current I (n) drawn into the battery in the calculation period (n) is greater than zero and the amount of current accumulated in the battery in the previous period is 0, the amount of current accumulated in the battery is the reference current value (I) used at the value of I (n). subtracts _ref (n) and multiplies the elapsed time T (the shaded area in FIG. 6).

If the current I (n) drawn into the battery in the calculation period (n) is less than 0 and the amount of current accumulated in the battery in the previous cycle is 0, the amount of current accumulated in the battery is equal to the reference current value (I _ref ) at the value of I (n) ^2. subtracted the squared value of (n)) and multiplied by elapsed time (T) (hatched area in Fig. 7).

As described in detail with reference to FIG. 3, it may be said that the final output current value needs to be adjusted by comparing the actual accumulated current amount with the reference accumulated current amount by more than a predetermined percentage, and the predetermined percentage may be set to various values by an experiment. Can be. It is also desirable to consider the state in the period immediately before the battery. For example, a predetermined percentage is defined as 95% (where the ratio is set to 95%, but not limited thereto, and may be any selected ratio between 90 and 98%). In this case, the output current value is adjusted even if the actual accumulated current exceeds only 5% of the current amount reference value (where the ratio is 5% but is not limited thereto and may select any ratio between 2 and 10%). This can be set as necessary as described above.

In addition, the output current value can be adjusted according to whether the state of the battery is stable or unstable. That is, when the battery returns to a stable state, it may output the maximum current value that the battery can use, and when the battery is unstable, it may be necessary to maintain the output of the battery at the reference current value to prevent deterioration. have. After that, if the battery returns to a stable state, it may output again at the maximum current value.

Therefore, as shown in the output of the battery over time, as shown in FIG. 8, the output current value of the battery is in a form of periodically increasing and decreasing the maximum current value and the reference current value. In this case, the maximum current value varies according to SOC, IR, diagnostic state, etc. in the corresponding calculation period, and the reference current value is a value corrected through internal parameters such as SOC and IR.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited to the above-described embodiments, which is understood by those skilled in the art to which the present invention pertains. It will be understood that variations and modifications may be made in various forms within the scope of the technical idea. The spirit of the present invention should be grasped by the claims described below, and all equivalent or equivalent modifications are all included within the scope of the technical idea of the present invention.

[Description of the code]

100; Battery output control unit

110; Maximum current value calculator

120; Reference current value calculator

130; Usage calculation unit

140; Output value determiner

150; Cumulative current amount calculation unit

Claims

A maximum current value calculator for calculating a maximum current value that the battery can output;

A reference current value calculator configured to calculate a reference current value that does not substantially affect battery deterioration;

A current value corrector for correcting the reference current value using parameters including an internal resistance of the battery;

A usage calculation unit measuring a current value calculated from the battery and calculating an actual amount of current used;

A cumulative current amount calculating unit configured to measure and output a reference cumulative current amount accumulated in the battery using the reference current value; And

And an output value determiner configured to compare the actual current amount output from the usage amount calculator with the reference accumulated current amount output from the accumulated current amount calculator, and to select a final output value among a maximum current value and a reference current value.
The method of claim 1,

And the maximum current value calculator further calculates a maximum current value that the battery can output for a predetermined sample time.
The method of claim 2,

And the cumulative current amount calculating unit further calculates a reference cumulative current amount that can accumulate in the battery during the sample time by using the maximum current value.
The method of claim 3,

And the cumulative current amount calculating unit calculates the reference cumulative current amount differently according to whether the battery is in a charged state or a discharged state.
The method of claim 3,

The output value determining unit compares the accumulated current amount A during the predetermined sample time with the actual amount B accumulated in the battery, and determines an output current value of the battery as the maximum current value or the reference current value. Battery output control device.
The method of claim 3,

And the output value determiner determines the state of the battery according to a ratio of the accumulated current amount A during the predetermined sample time to the actual amount of current B accumulated in the battery.
The method of claim 5,

The output value determining unit determines the output current value of the battery as the maximum current value when the actual accumulated current amount B becomes less than or equal to a first predetermined value of the accumulated current amount A during the predetermined sample time. Battery output control device.
The method of claim 7, wherein

And the first predetermined value is any one of values between 2 and 10%.
The method of claim 6,

The output value determination unit determines the output current value of the battery as the maximum current value when determining that the state of the battery is a normal state and the reference when determining that the state of the battery is a continuous state. Battery output control device characterized in that determined by the current value.
The method of claim 5,

The output value determining unit changes to a continuous state when the actual accumulated current amount B becomes equal to or greater than a second predetermined value of the accumulated current amount A during the predetermined sample time in a normal state. And the output current value of the battery is determined as the reference current value.
The method of claim 10,

And the second predetermined value is any one of 90 to 98%.
The method of claim 5,

The output value determining unit changes to a normal state when the actual cumulative current amount B becomes less than or equal to a first predetermined value of the cumulative current amount A during the predetermined sample time in a continuous state. And the output current value of the battery is determined as the maximum current value.
The method of claim 1,

And the output value determiner determines the output current value of the battery periodically every predetermined time unit.
Calculating a maximum current value that the battery can output for a predetermined sample time;

Calculating a reference current value that does not substantially affect battery degradation;

Correcting the reference current value using parameters including the internal resistance, voltage, and diagnostic status of the battery; And

Determining an output current value of the battery by using an amount of current actually accumulated in the battery.
The method of claim 14,

The battery output control method further comprising the step of measuring the amount of current accumulated in the battery.
The method of claim 14,

And calculating a reference cumulative current amount that can accumulate in the battery during the sample time by using the maximum current value.
The method of claim 16,

The calculating of the reference cumulative current amount may include calculating the reference cumulative current amount differently according to whether the battery is in a charged state or a discharged state.
The method of claim 17,

And comparing the accumulated current amount (A) during the predetermined sample time with the actual amount of current (B) accumulated in the battery.
The method of claim 17,

And determining the state of the battery according to a ratio of the accumulated current amount A during the predetermined sample time to the actual amount of current B accumulated in the battery.
The method of claim 17,

Determining the output current value of the battery is the maximum value of the output current value of the battery when the actual cumulative current amount (B) is less than the first predetermined value of the cumulative current amount (A) during the predetermined sample time Battery output control method characterized in that determined by the current value.
The method of claim 20,

And the first predetermined value is any one between 2 and 10%.
The method of claim 19,

The determining of the output current value of the battery may include determining the output current value of the battery as the maximum current value when the state of the battery is determined to be a normal state and the state of the battery being a continuous state. ) Is determined based on the reference current value.
The method of claim 17,

The output value determining unit changes to a continuous state when the actual accumulated current amount B becomes equal to or greater than a second predetermined value of the accumulated current amount A during the predetermined sample time in a normal state. And determining the output current value of the battery as the reference current value.
The method of claim 23,

And the second predetermined value is any one of 90 to 98%.
The method of claim 17,

The output value determining unit changes to a normal state when the actual cumulative current amount B becomes less than or equal to a first predetermined value of the cumulative current amount A during the predetermined sample time in a continuous state. And determining the output current value of the battery as the maximum current value.