KR20220045452A - Apparatus and method for managing battery - Google Patents

Abstract

Provided are a battery management apparatus and method capable of generating a discharge model for a battery cell and estimating a dischargeable capacity of the battery cell based on the generated discharge model. The battery management apparatus according to an embodiment of the present invention comprises: a discharging unit configured to discharge a battery cell in multiple cycles so that a different discharge current is output from the battery cell in each cycle; a timer unit configured to measure a discharging time for each cycle in which the battery cell is discharged by the discharging unit; and a control unit configured to receive respective discharge times for the multiple discharge currents in the multiple cycles, generate a discharge model representing a correspondence between the multiple discharge currents in the multiple cycles and the discharge times for the multiple discharge currents, calculate a target discharge current for a target current time based on the generated discharge model when a dischargeable capacity for the target discharge time is requested from the outside, and calculate the dischargeable capacity based on the calculated target discharge current and the target discharge time.

Description

BATTERY MANAGEMENT APPARATUS AND METHOD FOR MANAGING BATTERY

The present invention relates to a battery management apparatus and method, and more particularly, to a battery management apparatus and method capable of estimating a dischargeable capacity.

Recently, as the demand for portable electronic products such as laptops, video cameras, and mobile phones has rapidly increased, and the development of electric vehicles, energy storage batteries, robots, satellites, etc. is in full swing, high-performance batteries that can be repeatedly charged and discharged have been developed. Research is being actively conducted.

Currently commercialized batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium batteries. It is in the spotlight because of its low energy density and high energy density.

In order to utilize such a battery, it is important to predict the dischargeable capacity of the battery. Accordingly, in the related art, the dischargeable capacity of the battery is predicted by directly measuring the discharging capacity of the battery with respect to temperature and/or discharging current through a test. However, this method has a problem in that it may take a considerable amount of time for the test, and the use of the battery for the test is limited.

The present invention has been devised to solve the above problems, and provides a battery management apparatus and method capable of generating a discharge model for a battery cell and estimating a dischargeable capacity of the battery cell based on the generated discharge model. intended to provide

Other objects and advantages of the present invention may be understood by the following description, and will become more clearly understood by the examples of the present invention. In addition, it will be readily apparent that the objects and advantages of the present invention can be realized by means and combinations thereof indicated in the claims.

A battery management apparatus according to an aspect of the present invention comprises: a discharging unit configured to discharge a battery cell in a plurality of cycles, and to discharge the battery cell so that different discharge currents are output from the battery cell in each cycle; a timer unit configured to measure a discharge time for each cycle in which the battery cell is discharged by the discharging unit; and receiving a discharge time for each of the plurality of discharge currents for the plurality of cycles from the timer unit, and generates a discharge model indicating a correspondence relationship between the plurality of discharge currents for the plurality of cycles and the discharge times for each of the plurality of discharge currents and, when a dischargeable capacity for a target discharge time is requested from the outside, a target discharge current for the target discharge time is calculated based on the generated discharge model, and the target discharge current is calculated based on the target discharge time and the target discharge time. and a control unit configured to calculate the dischargeable capacity.

The discharge model may be a functional model representing a continuous discharge current with respect to a continuous discharge time based on a correspondence relationship between the plurality of discharge currents and a discharge time for each of the plurality of discharge currents.

The control unit may be configured to calculate the target discharge current by substituting the target discharge time into the generated discharge model, and to calculate the dischargeable capacity by multiplying the calculated target discharge current and the target discharge time.

The discharging unit may be configured to discharge the battery cells in the plurality of cycles such that each of the plurality of discharge currents is output for each of the plurality of temperatures.

The controller may be configured to generate the discharge model representing a correspondence relationship between the plurality of discharge currents and a discharge time for each of the plurality of discharge currents for each of the plurality of temperatures.

When the dischargeable capacity for the target discharge time and the target temperature is requested from the outside, the control unit determines whether the target temperature is included in the plurality of temperatures, and when the target temperature is included in the plurality of temperatures , to calculate the target discharge current for the target discharge time based on a discharge model generated for the target temperature.

The controller may be configured to generate a coefficient model indicating a correspondence relationship between a coefficient included in the discharge model generated for each of the plurality of temperatures and a corresponding temperature.

The control unit determines whether the target temperature is included in the plurality of temperatures when the dischargeable capacity for the target discharge time and the target temperature is requested from the outside, and the target temperature is not included in the plurality of temperatures Otherwise, a target coefficient corresponding to the target temperature is calculated from the coefficient model, a target discharge model corresponding to the calculated target coefficient is generated, and the target discharge current for the target discharge time based on the generated target discharge model It can be configured to calculate

A battery pack according to another aspect of the present invention may include the battery management apparatus according to an aspect of the present invention.

A battery management method according to another aspect of the present invention includes discharging the battery cells in a plurality of cycles, discharging the battery cells so that different discharge currents are output from the battery cells in each cycle; a discharging time measuring step of measuring a discharging time for each cycle in which the battery cells are discharged in the discharging step; a discharge model generating step of generating a discharge model representing a correspondence relationship between a plurality of discharge currents for the plurality of cycles and a discharge time for each of the plurality of discharge currents; a discharge current calculation step of calculating a target discharge current for the target discharge time based on the generated discharge model when a dischargeable capacity for the target discharge time is requested from the outside; and calculating the dischargeable capacity based on the calculated target discharge current and the target discharge time.

The battery management apparatus according to an aspect of the present invention has a feature of generating a discharge model and estimating a dischargeable capacity for a target discharge time based on the generated discharge model. Therefore, even if the discharge current and the dischargeable capacity corresponding to the target discharge time are not actually measured, there is an advantage that the dischargeable capacity corresponding to the target discharge time can be quickly and accurately estimated.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

The following drawings attached to the present specification serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention should not be construed as limited only to the matters described in such drawings.
1 is a diagram schematically illustrating a battery management apparatus according to an embodiment of the present invention.
2 is a diagram illustrating an exemplary configuration of a battery pack including a battery management apparatus according to an embodiment of the present invention.
3 is a diagram schematically illustrating a discharge time table according to an embodiment of the present invention.
4 is a diagram schematically illustrating a discharge model according to an embodiment of the present invention.
5 is a diagram schematically illustrating another discharge time table according to an embodiment of the present invention.
6 is a diagram schematically illustrating a coefficient table according to an embodiment of the present invention.
7 is a diagram schematically illustrating a first coefficient model according to an embodiment of the present invention.
8 is a diagram schematically illustrating a second coefficient model according to an embodiment of the present invention.
9 is a diagram schematically illustrating a battery management method according to another embodiment of the present invention.

The terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor may properly define the concept of the term in order to best describe his invention. Based on the principle that there is, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.

In addition, in the description of the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms including an ordinal number such as 1st, 2nd, etc. are used for the purpose of distinguishing any one of various components from the others, and are not used to limit the components by such terms.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless specifically stated otherwise.

In addition, a term such as a control unit described in the specification means a unit for processing at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

In addition, throughout the specification, when a part is "connected" with another part, it is not only "directly connected" but also "indirectly connected" with another element interposed therebetween. include

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram schematically illustrating a battery management apparatus 100 according to an embodiment of the present invention. 2 is a diagram illustrating an exemplary configuration of a battery pack 1 including the battery management apparatus 100 according to an embodiment of the present invention.

Referring to FIG. 1 , the battery management apparatus 100 according to an embodiment of the present invention may include a discharge unit 110 , a timer unit 120 , and a control unit 130 .

The discharging unit 110 may be configured to discharge the battery cell B in a plurality of cycles, and to discharge the battery cell B so that different discharge currents are output from the battery cell B in each cycle. That is, the discharge unit 110 may be configured to discharge the battery cells B for each of a plurality of discharge currents.

Here, the battery cell (B) means one independent cell having a negative terminal and a positive terminal and physically separable. For example, one pouch-type lithium polymer cell may be regarded as the battery cell (B).

Specifically, the discharge unit 110 may discharge the battery cells B with different discharge currents in a plurality of cycles. For example, the discharge unit 110 may fully discharge the battery cell B fully charged in the first cycle with the first discharge current. That is, in the first cycle, the battery cell B having a state of charge (SOC) of 100% is discharged to an SOC of 0%, and the magnitude of the current output from the battery cell B in the first cycle may be the first discharge current. there is. Similarly, the discharge unit 110 discharges the battery cell B to output the second discharge current in the second cycle, discharges the battery cell B to output the third discharge current in the third cycle, and the fourth In a cycle, the battery cell B may be discharged so that the fourth discharge current is output.

For example, in the embodiment of FIG. 2 , the discharge unit 110 may be connected to both ends of the battery cell (B). In addition, the discharge unit 110 may discharge the battery cell B according to an operating state. Preferably, the operating state of the discharge unit 110 may be controlled by the control unit 130 . That is, when the operating state of the discharging unit 110 is switched to the discharging start state, the discharging unit 110 may discharge the battery cell B. The discharging unit 110 may measure the voltage of the battery cell B during the discharging process, and when the voltage of the battery cell B reaches a predetermined voltage, the discharging may be terminated. Simultaneously with the end of the discharge, the operating state of the discharge unit 110 may be switched to the discharge end state.

The timer unit 120 may be configured to measure a discharge time for each cycle in which the battery cell B is discharged by the discharge unit 110 .

Preferably, the timer unit 120 may measure the discharge time of the battery cell B for each of the plurality of discharge currents. For example, in the previous embodiment, the timer unit 120 discharges the discharge time for the first discharge current of the first cycle, the discharge time for the second discharge current of the second cycle, and the discharge time for the third discharge current of the third cycle The time and the discharge time for the fourth discharge current of the fourth cycle may be measured.

The control unit 130 may be configured to receive a discharge time for each of a plurality of discharge currents for the plurality of cycles from the timer unit 120 .

For example, in the embodiment of FIG. 2 , the control unit 130 and the timer unit 120 may be connected to communicate with each other. The timer unit 120 may measure a discharge time during which the battery cell B is discharged, and transmit the measured discharge time to the controller 130 .

3 is a diagram schematically illustrating a discharge time table T1 according to an embodiment of the present invention.

Specifically, the discharging time table T1 of FIG. 3 is a table showing the discharging time at which the battery cell B is fully discharged with the first to fourth discharging currents when the temperature of the battery cell B is 45°C. Here, fully discharged means that the battery cell B having an SOC of 100% is discharged to an SOC of 0%.

For example, in the embodiment of FIG. 3 , the controller 130 may map and store the discharge time measured by the timer unit 120 for each of the first to fourth discharge currents in the discharge time table T1 .

The controller 130 may be configured to generate a discharge model indicating a correspondence relationship between a plurality of discharge currents for the plurality of cycles and a discharge time for each of the plurality of discharge currents.

4 is a diagram schematically illustrating a discharge model according to an embodiment of the present invention. Specifically, the discharge model of FIG. 4 may be a discharge model generated based on the discharge time table T1 of FIG. 3 .

Specifically, the controller 130 generates a discharge model based on the discharge time for the first discharge current, the discharge time for the second discharge current, the discharge time for the third discharge current, and the discharge time for the fourth discharge current. can Such a discharge model may be expressed as shown in FIG. 4 in an X-Y plane graph in which the X axis is set as the discharge time and the Y axis is set as the discharge current. Here, it is noted that the sign of the discharge current is "-" to indicate that the current is discharged from the battery cell (B).

Preferably, the discharge model can be expressed by the following equation.

[Equation]

For example, in the embodiment of FIG. 4 , the discharge model may be expressed as a functional model of “y=(59.511×lnx)-571.17”. That is, in the embodiment of FIG. 4 , the first coefficient may be 59.511 and the second coefficient may be -571.17.

The controller 130 may be configured to calculate a target discharge current for the target discharge time TS based on the generated discharge model when a dischargeable capacity for the target discharge time TS is requested from the outside.

As described above, the discharge model may be a model indicating the correspondence between the discharge time and the discharge current. More specifically, the discharge model may be a functional model representing a continuous discharge current with respect to a continuous discharge time based on a correspondence relationship between the plurality of discharge currents and a discharge time for each of the plurality of discharge currents.

Accordingly, the controller 130 may be configured to calculate the target discharge current by substituting the target discharge time TS into the generated discharge model. That is, in the embodiment of FIG. 4 , the controller 130 may calculate the target discharge current of -50 (mA) by substituting the target discharge time TS into the discharge model.

Also, the controller 130 may be configured to calculate the dischargeable capacity based on the calculated target discharge current and the target discharge time TS. Specifically, the controller 130 may be configured to calculate the dischargeable capacity by multiplying the calculated target discharge current and the target discharge time TS.

For example, in the embodiment of FIG. 4 , the controller 130 may calculate the dischargeable capacity by multiplying the calculated target discharge current -50 (mA) by the target discharge time TS. In this case, the dischargeable capacity may be "-50xTS". Here, the "-" sign does not mean that the actual dischargeable capacity has a negative value, but may be a sign indicating discharge.

The battery management apparatus 100 according to an embodiment of the present invention has a feature of generating a discharge model and estimating a dischargeable capacity for a target discharge time TS based on the generated discharge model. Therefore, even if the discharge current and the dischargeable capacity corresponding to the target discharge time TS are not actually measured, there is an advantage that the dischargeable capacity corresponding to the target discharge time TS can be quickly and accurately estimated.

On the other hand, the control unit 130 provided in the battery management apparatus 100 according to an embodiment of the present invention is a processor, ASIC (application-specific integrated circuit) known in the art to execute various control logic performed in the present invention. , other chipsets, logic circuits, registers, communication modems, data processing devices, and the like. Also, when the control logic is implemented in software, the controller 130 may be implemented as a set of program modules. In this case, the program module may be stored in the memory and executed by the controller 130 . The memory may be inside or outside the control unit 130 , and may be connected to the control unit 130 by various well-known means.

Also, the battery management apparatus 100 according to an embodiment of the present invention may further include a storage unit 140 . The storage unit 140 may store programs and data necessary for the battery management apparatus 100 . That is, the storage unit 140 may store data necessary for each component of the battery management apparatus 100 to perform operations and functions, or data generated in the process of performing programs or operations and functions. The storage unit 140 is not particularly limited in its type as long as it is a known information storage means capable of writing, erasing, updating and reading data. As an example, the information storage means may include RAM, flash memory, ROM, EEPROM, registers, and the like. Also, the storage unit 140 may store program codes in which processes executable by the control unit 130 are defined.

For example, the discharge time table T1 according to the embodiment of FIG. 3 and the discharge model according to the embodiment of FIG. 4 may be stored in the storage unit 140 .

The discharge unit 110 may be configured to discharge the battery cells B in the plurality of cycles such that each of the plurality of discharge currents is output at a plurality of temperatures.

Specifically, the discharge unit 110 may discharge the battery cell B at a plurality of temperatures of the battery cell B for each of a plurality of discharge currents. For example, the discharging unit 110 may discharge the battery cell B at a temperature of 0° C. with the first to fourth discharging currents, respectively. Also, the discharging unit may discharge the battery cell B at a temperature of 25° C. with each of the first to fourth discharging currents.

The controller 130 may be configured to generate the discharge model representing a correspondence relationship between the plurality of discharge currents and a discharge time for each of the plurality of discharge currents for each of the plurality of temperatures.

5 is a diagram schematically illustrating another discharge time table T2 according to an embodiment of the present invention.

Specifically, in the discharge time table T2 of FIG. 5, when the temperature of the battery cell B is -10°C, 0°C, 25°C, and 45°C, the discharge time at which the first to fourth discharge currents are fully discharged is a table showing

For example, in the embodiment of FIG. 5 , the controller 130 may generate a discharge model for each temperature. Specifically, the controller 130 may generate a first discharge model based on the discharge times for the first to fourth discharge currents when the temperature of the battery cell B is the first temperature (-10°C). there is. Also, the controller 130 may generate the second discharge model based on the discharge times for the first to fourth discharge currents when the temperature of the battery cell B is the second temperature (0°C). Also, the controller 130 may generate the third discharge model based on the discharge times for the first to fourth discharge currents when the temperature of the battery cell B is the third temperature (25° C.). Also, the controller 130 may generate the fourth discharge model based on the discharge times for the first to fourth discharge currents when the temperature of the battery cell B is the fourth temperature (45° C.).

Also, the controller 130 may be configured to generate a coefficient model indicating a correspondence relationship between the coefficients included in the discharge model for each temperature and the plurality of temperatures.

6 is a diagram schematically illustrating a coefficient table T3 according to an embodiment of the present invention.

Specifically, the coefficient table T3 of FIG. 6 is a table showing the first coefficient and the second coefficient of each of the first to fourth discharge models according to the temperature of the battery cell B. Referring to FIG. That is, the first coefficient of the first discharge model may be 27, and the second coefficient may be -270. Also, the first coefficient of the second discharge model may be 30, and the second coefficient may be -300. Also, the first coefficient of the third discharge model may be 46, and the second coefficient may be -450. Also, the first coefficient of the fourth discharge model may be 59, and the second coefficient may be -571.

7 is a diagram schematically illustrating a first coefficient model according to an embodiment of the present invention. Specifically, FIG. 7 is a diagram schematically illustrating a first coefficient model with respect to a temperature and a first coefficient.

8 is a diagram schematically illustrating a second coefficient model according to an embodiment of the present invention. Specifically, FIG. 8 is a diagram schematically illustrating a second coefficient model with respect to a temperature and a second coefficient.

Specifically, the control unit 130 controls the first coefficient of the first discharge model with respect to the first temperature, the first coefficient of the second discharge model with respect to the second temperature, the first coefficient of the third discharge model with respect to the third temperature, and A coefficient model based on the first coefficient of the fourth discharge model with respect to the fourth temperature may be generated. Such a coefficient model may be expressed as shown in FIG. 7 in an X-Y plane graph in which the X-axis is set as the first coefficient and the Y-axis is set as the temperature.

Also, specifically, the controller 130 controls the second coefficient of the first discharge model with respect to the first temperature, the second coefficient of the second discharge model with respect to the second temperature, and the second coefficient of the third discharge model with respect to the third temperature. A coefficient model may be generated based on the second coefficient of the fourth discharge model with respect to the coefficient and the fourth temperature. Such a coefficient model may be expressed as shown in FIG. 8 in an X-Y plane graph in which the X-axis is set as the second coefficient and the Y-axis is set as the temperature.

Thereafter, when the dischargeable capacity for the target discharge time TS and the target temperature TT is requested from the outside, the control unit 130 determines whether the target temperature TT is included in the plurality of temperatures. can be configured to judge.

If the target temperature TT is included in the plurality of temperatures, the controller 130 controls the target discharge current for the target discharge time TS based on the discharge model generated for the target temperature TT. It can be configured to calculate

For example, it is assumed that the target temperature TT is 45°C. In this case, the controller 130 may calculate the discharge current for the target discharge time TS by using the discharge model of FIG. 4 . Specifically, since the discharge model of FIG. 4 is a discharge model generated when the temperature of the battery cell B is 45° C., the controller 130 may match the target discharge time TS to the discharge model. In addition, the controller 130 may calculate -50 (mA) as the target discharge current corresponding to the target temperature TT.

Conversely, when the target temperature TT is not included in the plurality of temperatures, the controller 130 may be configured to calculate a target coefficient corresponding to the target temperature TT from the coefficient model. That is, when the target temperature TT is not included in the plurality of temperatures, a discharge model corresponding to the target temperature TT may not be generated. Accordingly, the controller 130 may calculate a target coefficient corresponding to the target temperature TT from the coefficient model in order to generate a discharge model corresponding to the target temperature TT.

For example, it is assumed that the target temperature TT is different from the first to fourth temperatures. 7 , the controller 130 may calculate 40 as the first coefficient corresponding to the target temperature TT in the first coefficient model. Also, in the embodiment of FIG. 8 , the controller 130 may calculate -380 as the second coefficient corresponding to the target temperature TT in the second coefficient model.

Thereafter, the controller 130 may be configured to generate a target discharge model corresponding to the calculated target coefficient, and calculate a target discharge current for the target discharge time TS based on the generated target discharge model.

Specifically, the controller 130 may be configured to calculate the target discharge current by substituting the target discharge time TS into the discharge model.

For example, as in the previous embodiment, it is assumed that the first coefficient is calculated as 40 and the second coefficient is calculated as -380. The controller 130 may generate a target discharge model of “y=(40×lnx)−380” based on the calculated first and second coefficients. Here, y may be a discharge current, and x may be a discharge time. In addition, the controller 130 may calculate the discharge current y with respect to the target discharge time TS by substituting the target discharge time TS into the discharge time x of the generated target discharge model. That is, the calculated discharge current y may be the target discharge current.

The controller 130 may be configured to calculate the dischargeable capacity by multiplying the calculated target discharge current and the target discharge time TS.

That is, the dischargeable capacity can be expressed as the product of the discharge current and the discharge time. Accordingly, the controller 130 may calculate the dischargeable capacity by multiplying the target discharge time TS and the calculated discharge current. For example, referring to the above equation, the controller 130 may calculate “y×x” to calculate the dischargeable capacity.

The battery management apparatus 100 according to an embodiment of the present invention is a target based on the first coefficient model and the second coefficient model, even if there is a request for the dischargeable capacity with respect to the target temperature TT at which actual discharge is not performed. A target discharge model corresponding to the temperature TT may be generated. In addition, the battery management apparatus 100 may calculate the requested dischargeable capacity based on the generated target discharge model. That is, the battery management apparatus 100 has the advantage of being able to easily estimate and provide the dischargeable capacity corresponding to various temperatures and various discharge times without directly measuring the dischargeable capacity of the battery cell B .

The battery management apparatus 100 according to the present invention may be applied to a Battery Management System (BMS). That is, the BMS according to the present invention may include the above-described battery management apparatus 100 . In this configuration, at least some of each component of the battery management apparatus 100 may be implemented by supplementing or adding functions of the configuration included in the conventional BMS. For example, the discharge unit 110 , the control unit 130 , the timer unit 120 , and the storage unit 140 of the battery management apparatus 100 may be implemented as components of the BMS.

Also, the battery management apparatus 100 according to the present invention may be provided in the battery pack 1 . That is, the battery pack 1 according to the present invention may include the battery management apparatus 100 and one or more battery cells B described above. In addition, the battery pack 1 may further include electronic components (relays, fuses, etc.) and a case. For example, in the embodiment of FIG. 2 , the battery management apparatus 100 may be provided in the battery pack 1 .

9 is a diagram schematically illustrating a battery management method according to another embodiment of the present invention.

Preferably, each step of the battery management method may be performed by the battery management apparatus 100 . Hereinafter, for convenience of description, content overlapping with the previously described content will be omitted or briefly described.

Referring to FIG. 9 , the battery management method includes a discharging step (S100), a discharging time measurement step (S200), a discharge model generation step (S300), a discharge current calculation step (S400), and a dischargeable capacity calculation step (S500) can do.

The discharging step (S100) is a step of discharging the battery cell (B) in a plurality of cycles, and discharging the battery cell (B) so that different discharge currents are output from the battery cell (B) in each cycle, (110).

For example, the discharge unit 110 may discharge the battery cell B in a plurality of cycles. Here, the magnitude of the discharge current output from the battery cell B in each cycle may be different from each other.

Also, the discharge unit 110 may discharge the battery cells B in a plurality of cycles at a plurality of temperatures. Here, the battery cell B is discharged in a plurality of cycles at each temperature, and the magnitude of the discharge current output from the battery cell B in each cycle of the same temperature may be different from each other.

The discharging time measuring step S200 is a step of measuring the discharging time for each cycle in which the battery cell B is discharged in the discharging step S100 , and may be performed by the timer unit 120 .

For example, the timer unit 120 may measure the time for which the battery cell B having an SOC of 100% is discharged to an SOC of 0% by the discharge unit 110 .

The generating a discharge model ( S300 ) is a step of generating a discharge model representing a correspondence relationship between a plurality of discharge currents for the plurality of cycles and a discharge time for each of the plurality of discharge currents, and may be performed by the controller 130 .

For example, in the embodiment of FIG. 4 , the controller 130 may generate a discharge model indicating a correspondence relationship between a discharge time and a discharge current.

The discharge current calculation step (S400) is a step of calculating the target discharge current for the target discharge time (TS) based on the generated discharge model when a dischargeable capacity for the target discharge time (TS) is requested from the outside, This may be performed by the controller 130 .

For example, in the embodiment of FIG. 4 , the controller 130 may calculate -50 (mA) as the discharge current corresponding to the target discharge time TS by using the discharge model.

The dischargeable capacity calculation step S500 is a step of calculating the dischargeable capacity based on the calculated target discharge current and the target discharge time TS, and may be performed by the controller 130 .

For example, in the embodiment of FIG. 4 , the controller 130 may calculate the dischargeable capacity by multiplying the target discharge time TS and the calculated discharge current -50 mA.

The embodiments of the present invention described above are not implemented only through the apparatus and method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium in which the program is recorded. The implementation can be easily implemented by those skilled in the art to which the present invention pertains from the description of the above-described embodiments.

In the above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto and will be described below with the technical idea of the present invention by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims.

In addition, since the present invention described above is capable of various substitutions, modifications and changes within the scope that does not depart from the technical spirit of the present invention for those of ordinary skill in the art to which the present invention pertains, the above-described embodiments and attachments It is not limited by the illustrated drawings, and all or part of each embodiment may be selectively combined and configured so that various modifications may be made.

1: battery pack
100: battery management device
110: discharge unit
120: timer unit
130: control unit
140: storage
B: battery cell

Claims (10)

a discharging unit configured to discharge the battery cells in a plurality of cycles, and to discharge the battery cells so that different discharge currents are outputted from the battery cells at each cycle;
a timer unit configured to measure a discharge time for each cycle in which the battery cells are discharged by the discharging unit; and
Receive a discharge time for each of the plurality of discharge currents for the plurality of cycles from the timer unit, and generate a discharge model indicating a correspondence relationship between the plurality of discharge currents for the plurality of cycles and the discharge times for each of the plurality of discharge currents, , when a dischargeable capacity for a target discharge time is requested from the outside, a target discharge current for the target discharge time is calculated based on the generated discharge model, and the discharge is performed based on the calculated target discharge current and the target discharge time and a control unit configured to calculate the available capacity.
According to claim 1,
The discharge model is
Based on the correspondence between the plurality of discharging currents and the discharging times for each of the plurality of discharging currents, the battery management device is a functional model representing a continuous discharge current with respect to a continuous discharge time.
According to claim 1,
The control unit is
and calculating the target discharging current by substituting the target discharging time into the generated discharging model, and multiplying the calculated target discharging current and the target discharging time to calculate the discharging capacity.
The method of claim 1,
The discharge unit,
and discharging the battery cells in the plurality of cycles such that each of the plurality of discharge currents is output at a plurality of temperatures.
5. The method of claim 4,
The control unit is
and generating the discharge model representing a correspondence relationship between the plurality of discharge currents and a discharge time for each of the plurality of discharge currents for each of the plurality of temperatures.
6. The method of claim 5,
The control unit is
When a dischargeable capacity for the target discharge time and target temperature is requested from the outside, it is determined whether the target temperature is included in the plurality of temperatures, and when the target temperature is included in the plurality of temperatures, the target temperature and calculating the target discharging current for the target discharging time based on the discharging model generated for .
6. The method of claim 5,
The control unit is
and generating a coefficient model representing a correspondence relationship between a coefficient included in the discharge model generated for each of the plurality of temperatures and a corresponding temperature.
8. The method of claim 7,
The control unit is
When a dischargeable capacity for the target discharge time and target temperature is requested from the outside, it is determined whether the target temperature is included in the plurality of temperatures, and if the target temperature is not included in the plurality of temperatures, the coefficient configured to calculate a target coefficient corresponding to the target temperature from the model, generate a target discharge model corresponding to the calculated target coefficient, and calculate the target discharge current for the target discharge time based on the generated target discharge model A battery management device, characterized in that.
A battery pack comprising the battery management device according to any one of claims 1 to 8.
a discharging step of discharging the battery cells in a plurality of cycles, discharging the battery cells so that different discharging currents are output from the battery cells at each cycle;
a discharging time measuring step of measuring a discharging time for each cycle in which the battery cells are discharged in the discharging step;
a discharge model generating step of generating a discharge model representing a correspondence relationship between a plurality of discharge currents for the plurality of cycles and a discharge time for each of the plurality of discharge currents;
a discharge current calculation step of calculating a target discharge current for the target discharge time based on the generated discharge model when a dischargeable capacity for the target discharge time is requested from the outside; and
and a discharging capacity calculation step of calculating the discharging capacity based on the calculated target discharging current and the target discharging time.

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