KR20190140781A - Apparatus for management battery - Google Patents

Abstract

A battery management device according to the present invention comprises: a temperature sensitive unit attached to one surface of a battery pack including a plurality of battery cells and changing color in response to heat conduction; a sensing unit positioned in an upper region of the temperature sensitive unit and measuring phase color information from the upper region of the temperature sensitive unit; a moving unit which moves the sensing unit in the upper region of the temperature sensitive unit; and a processor configured to compare the color information with a reference color information range, generate a pack degradation degree of the battery pack according to a comparison result, and diagnose whether the battery pack is deteriorated based on the pack degradation degree.

Description

Battery management device {Apparatus for management battery}

The present invention relates to a battery management apparatus, and more particularly, to a battery management apparatus for diagnosing whether a battery pack is deteriorated in response to color information of a temperature sensitive part whose color is changed in response to heat conducted from a battery pack.

Recently, as the demand for portable electronic products such as notebooks, video cameras, portable telephones, etc. is rapidly increased, and development of electric vehicles, energy storage batteries, robots, satellites, and the like is in earnest, high-performance secondary batteries capable of repeatedly charging and discharging are possible. There is an active research on.

Commercially available secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel-based secondary batteries, and thus are free of charge and discharge. The self-discharge rate is very low and the energy density is high.

On the other hand, such a secondary battery may be used as a single secondary battery, but a plurality of secondary batteries are often used in series and / or in parallel to provide high voltage and / or large capacity power storage devices. It is used in the form of a battery pack including a battery management device for controlling the overall charging and discharging operation of the internal secondary battery.

The battery management apparatus used in such a battery pack monitors the state of the battery using a temperature measuring circuit, a current measuring circuit, a voltage measuring circuit, and the like, and estimates SOC, SOH or balances the voltage between the batteries using the monitoring results. It protects the battery from overcharging, overcurrent, high voltage, over current, low temperature and high temperature.

In particular, in monitoring and protecting the condition of the battery, the temperature of the battery is the data used to estimate SOC and SOH. Accordingly, in the related art, a temperature sensor is provided around the battery, and the temperature of the battery is measured through a temperature measuring circuit measuring a temperature value corresponding to the voltage output from the temperature sensor as the temperature of the battery. However, due to deterioration of the temperature sensor of the temperature measuring circuit, an error in the measured temperature value increases as an incorrect voltage is output.

Therefore, in monitoring and protecting the condition of the battery, a technique for accurately measuring the temperature of the battery used and to diagnose whether the battery is deteriorated in response to the measured battery temperature is required.

The present invention provides a battery management apparatus in which a sensing unit measures color information from an upper region of a temperature sensitive unit whose color is changed in response to heat conducted from a battery pack, and allows the processor to diagnose whether the battery pack is deteriorated based on the color information. The purpose is to provide.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

Battery management apparatus according to the present invention for solving the above technical problem is attached to one surface of a battery pack having a plurality of battery cells, the temperature sensitive unit for changing the color corresponding to the thermal conductivity; A sensing unit positioned in an upper region of the temperature sensitive unit and measuring image color information from an upper region of the temperature sensitive unit; A moving unit which moves the sensing unit in an upper region of the temperature sensitive unit; And a processor comparing the color information with a reference color information range, generating a pack degradation degree of the battery pack in response to a comparison result, and diagnosing the degradation of the battery pack based on the pack degradation degree.

Preferably, when the color information is the same as included in the reference color information range, the processor corresponds to the reference color information range by referring to deterioration data to which the degradation information of the battery pack is mapped for each reference color information range. Pack degradation can be generated.

Preferably, the processor may compare the pack degradation degree with the reference pack degradation degree, and as a result of the comparison, when the pack degradation degree exceeds the reference pack degradation degree, the processor may diagnose that the degradation has occurred.

Preferably, the moving unit may move the sensing unit to any one sensing region of the upper region of the temperature sensitive unit divided into a plurality of sensing regions.

The sensing unit may measure color information of the temperature sensitive unit for each of the plurality of sensing regions.

Preferably, the processor generates the color information measured for each of the plurality of sensing areas as integrated color information, compares the integrated color information with a reference color information range, and adjusts the degree of degradation of the pack of the battery pack in response to the comparison result. The battery pack may be diagnosed based on the degree of deterioration of the battery pack.

Preferably, the processor corresponds to the reference color information range by referring to deterioration data to which the degradation information of the battery pack is mapped for each reference color information range if the integrated color information is included in the reference color information range. Pack degradation can be generated.

The battery pack according to the present invention may include the battery management device.

An automobile according to the present invention may include the battery management device.

According to the present invention, the sensing part measures color information from an upper region of the temperature sensitive part whose color is changed in response to heat conducted from the battery pack, and the processor diagnoses whether the battery pack is deteriorated based on the color information, thereby accumulating the accumulated battery. Accurate diagnosis of whether a battery pack deteriorates with the temperature of the pack is possible.

The following drawings attached to this specification are illustrative of the preferred embodiments of the present invention, and together with the detailed description of the invention to serve as a further understanding of the technical spirit of the present invention, the present invention described in those drawings It should not be construed as limited to.
1 is a diagram illustrating a configuration of a battery management apparatus according to an embodiment of the present invention.
2 is an exploded perspective view schematically illustrating a configuration of a battery management apparatus and a connection configuration of a battery pack according to an exemplary embodiment of the present invention.
3 is a perspective view schematically illustrating a state in which a battery management apparatus and a battery pack are coupled according to an embodiment of the present invention.
4 is a diagram illustrating a lower region of a sensing unit of a battery management apparatus according to an embodiment of the present invention.
5 is a diagram illustrating an upper region of a temperature sensitive part of a battery management apparatus according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating an example in which a temperature sensitive part of a battery management apparatus according to an exemplary embodiment is divided into a plurality of sensing regions.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

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

Terms including ordinal numbers such as first and second are used for the purpose of distinguishing any one of the various components from the others, and are not used to limit the components by such terms.

Throughout the specification, when a part is said to "include" a certain component, it means that it may further include other components, without excluding the other components unless otherwise stated. In addition, the term <control unit> described in the specification means a unit for processing at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

In addition, throughout the specification, when a part is "connected" to another part, it is not only "directly connected" but also "indirectly connected" with another element in between. Include.

1 is a view showing the configuration of a battery management apparatus 100 according to an embodiment of the present invention, Figure 2 is a configuration of a battery management apparatus 100 and a battery pack (P) according to an embodiment of the present invention 3 is an exploded perspective view schematically illustrating a connection configuration, and FIG. 3 is a perspective view schematically illustrating a state in which a battery management apparatus 100 and a battery pack P are coupled according to an embodiment of the present invention.

First, referring to FIGS. 1 to 3, the battery management apparatus 100 according to an embodiment of the present invention may include a temperature sensitive unit 110, a sensing unit 120, a moving unit 130, and a memory unit 140. It may include a processor 150 and a notification unit 160.

The temperature sensitive part 110 may be attached to one surface of the battery pack P including the plurality of battery cells C, and the color may be changed in response to thermal conductivity. In other words, the temperature sensitive unit 110 may change the color by receiving heat generated from the battery pack P due to deterioration of the battery pack P. FIG.

To this end, the temperature sensitive unit 110 may be a thermal sheet in which the thermal ink 112 is printed at a plurality of points on the plate 111 at equal intervals, as shown in FIG. 4.

The color of the thermal ink 112 of the temperature sensitive part 110 may not change color depending on the current temperature, but may change color corresponding to the accumulated amount of conducted heat.

More specifically, the heat sensitive ink 112 may be changed in color in response to the number of thermal conductions in which heat at a temperature exceeding a predetermined heat sensitive temperature is conducted.

For example, as illustrated in Table 1, the thermal ink 112 may change color every 100 times when heat at a temperature exceeding a predetermined thermal temperature “85 ° C.” is conducted.

Thermal conductivity 0 to 100 times 101 to 200 times 201 to 300 times color R: 255G: 0
B: 0 R: 0
G: 255
B: 0 R: 0
G: 0
B: 255

In this case, the change in the color of the thermal ink 112 may mean that the color information is changed. In one embodiment, the color information may be RGB color information.

On the other hand, the above-mentioned battery pack (P) is not particularly limited if the type can be repeatedly charged and discharged, as an example, the battery pack (P) is a plurality of battery cells (C) of a lithium polymer material made of a pouch type It can be provided.

In this case, the plurality of battery cells C may have a wide surface facing each other and be stacked in an up and down direction (Z-axis direction). Such a plurality of battery cells C may be accommodated in the housing H.

In addition, the battery pack P may include a plurality of battery cells electrically connected in series and / or in parallel. Of course, the case where the battery pack P includes only one unit cell is also included in the scope of the present invention.

In addition, the battery pack P may be electrically coupled to various loads. For example, the load may be a driving device (eg, an electric vehicle, a hybrid vehicle) that is driven using electric power, an unmanned aerial vehicle such as a drone, or a mobile device.

In one embodiment, the temperature sensitive unit 110 may be attached to face the top of the battery pack (P). In addition, the temperature sensitive unit 110 may be closest to the battery cell positioned at the top of the plurality of battery cells C provided in the battery pack P.

4 is a view illustrating a lower region of the sensing unit 120 of the battery management apparatus 100 according to an embodiment of the present invention.

Referring to FIG. 4, the sensing unit 120 may be located in an upper region of the temperature sensitive unit 110 to measure color information of the temperature sensitive unit 110.

To this end, the sensing unit 120 may include a lens module 121, an illumination module 122, a movement module 123, and a measurement module.

The lens module 121 may receive light emitted from the upper region of the temperature sensitive unit 110 and transmit the light to the measurement module.

Thereafter, the measurement module may receive light transmitted from the lens module 121 and measure color information of the corresponding light. In one embodiment, the measurement module may measure RGB color information among various kinds of color information. In one embodiment, the measurement module may be a microcontroller.

The lighting module 122 may emit light to the upper region of the temperature sensitive part 110 in the mounting environment of the battery pack P without light. That is, the lighting module 122 may be a light source of light that is reflected by the thermal ink 112 of the temperature sensitive unit 110 and received by the lens module 121.

As shown in FIG. 3, the moving module 123 moves the sensing unit 120 in a horizontal direction along the first rail 131 of the moving unit 130 on which the sensing unit 120 is mounted (X-axis). Direction). To this end, the moving module 123 may be a gear for moving the sensing unit 120 by being inserted into and rotated by the chain 131b provided inside the first rail 131.

On the other hand, it is noted that the sensing unit 120 is not limited as long as it measures the color information of the temperature sensitive unit 110. Preferably, the sensing unit 120 may be an RGB sensor that measures RGB color information using color information.

The sensing unit 120 may measure the color information from the temperature sensitive unit 110 at predetermined intervals, and provide a measurement signal indicating the measured color information to the processor 150.

When the measurement signal is received from the sensing unit 120, the processor 150 may determine a digital value of color information through signal processing and store the digital value in the memory unit 140.

Referring back to FIGS. 1 to 3, the moving unit 130 may move the sensing unit 120 within the upper region of the temperature sensitive unit 110.

To this end, the moving part 130 may include a first rail 131 and a second rail 132.

As shown in FIG. 3, the first rail 131 has a seating space 131a on which the sensing unit 120 is seated, and a moving module of the sensing unit 120 inside the seating space 131a. A chain 131b into which the 123 is inserted may be formed. As the chain 131b is rotated according to the control signal of the processor 150, the chain 131b may move the sensing unit 120 in a left and right direction (X-axis direction).

The first rail 131 may have a hole 131c formed therein so that the moving bar 132a of the second rail 131 may be inserted therein. A motor is provided inside the hole 131c, and the motor provided inside the hole 131c is rotated according to a control signal of the processor 150, thereby moving the sensing unit 120 in the front-rear direction (Y-axis direction). Can be moved to).

The second lane may have a pillar 132B attached to an edge of the battery pack P to support the moving bar 132a.

On the other hand, the moving unit 130 is not limited to the kind as long as the sensing unit 120 to move in the upper region of the temperature sensitive unit 110.

The memory unit 140 is a semiconductor memory device that records, erases, and updates data generated by the processor 150, and diagnoses whether the battery pack P and the plurality of battery cells C are deteriorated. A plurality of prepared program codes are stored. In addition, the memory unit 140 may store preset values of various predetermined parameters used when implementing the present invention.

The memory unit 140 is not particularly limited as long as it is a semiconductor memory device known to be capable of writing, erasing, and updating data. As an example, the memory unit 140 may be a DRAM, an SDRAM, a flash memory, a ROM, an EEPROM, a register, or the like. The memory unit 140 may further include a storage medium storing program codes defining control logic of the processor 150. The storage medium includes an inert storage element such as a flash memory or a hard disk. The memory unit 140 may be physically separated from the processor 150 or may be integrally integrated with the processor 150.

5 is a diagram illustrating an upper region of the temperature sensitive unit 110 of the battery management apparatus 100 according to an embodiment of the present invention.

Referring to FIG. 5, the processor 150 compares the color information of the temperature sensitive unit 110 with the reference color information range, and generates a pack degradation degree of the battery pack P in response to the comparison result. The battery pack P may be diagnosed based on the degree of deterioration of the battery pack.

More specifically, when the color information is included in the reference color information range, the processor 150 may refer to the degradation data in which the degradation information of the battery pack is mapped for each reference color information range, and thus, the pack degradation degree corresponding to the reference color information range. Can be generated.

Here, the deterioration data may be mapping data in which the number of times of thermal conduction, which is deterioration information of the battery pack, is mapped for each reference color information range as shown in Table 2 below.

Thermal conductivity 0 to 100 times 101 to 200 times 201 to 300 times Reference color information range R: 200 to 255 G: 0 to 50 to 50
B: 0 to 50 to 50 R: 0 to 50
G: 200 to 255
B: 0 to 50 R: 0 to 50
G: 0 to 50
B: 200 to 255

For example, the reference color information ranges are (R: 200 to 255, G: 0 to 50, B: 0 to 50), (R: 0 to 50, G: 200 to 255, B: 0 to 50), and ( R: 0 to 50, G: 0 to 50, B: 200 to 255), and the measured color information is (R: 100, G: 0, B: 0), the processor 150 measures the measured color. Since there is no reference color information range in which the information is included, pack degradation may not be generated.

In contrast, the reference color information ranges are (R: 200 to 255, G: 0 to 50, B: 0 to 50), (R: 0 to 50, G: 200 to 255, B: 0 to 50), and (R: 0 to 50, G: 0 to 50, B: 200 to 255, and the measured color information is (R: 210, G: 0, B: 0), the processor 150 determines that the measured color information Since it is included in the reference color information range, the thermal conduction number "0 to 100 times" which is deterioration information of the battery pack mapped to the corresponding reference color information range (R: 200 to 255, G: 0 to 50, B: 0 to 50). The deterioration degree of the pack may be generated by referring to.

The processor 150 may generate “100 times”, which is the highest number of times, among “0 to 100 times” of heat conduction, which is deterioration information of the battery pack, as the pack degradation degree.

Subsequently, the processor 150 may compare the pack deterioration degree with the reference pack deterioration degree, and as a result of the comparison, when the pack deterioration degree exceeds the reference pack deterioration degree, the processor 150 may diagnose that the battery pack P is deteriorated.

For example, if the reference pack degradation is "200 times" and the generated pack degradation is "100 times" as in the above-described example, the processor 150 may cause the pack degradation to exceed the reference pack degradation. Therefore, the battery pack P may be diagnosed as having no deterioration.

In contrast, the reference color information ranges are (R: 200 to 255, G: 0 to 50, B: 0 to 50), (R: 0 to 50, G: 200 to 255, B: 0 to 50), and (R : 0 to 50, G: 0 to 50, B: 200 to 255), and color information measured due to deterioration of the battery pack P as shown at point "A" in FIG. 5 is (R: 0 to 50, In the case of G: 0 to 50 and B: 210, since the measured color information is included in the reference color information range, the processor 150 includes the corresponding reference color information range (R: 0 to 50, G: 0 to 50, B: The pack deterioration degree may be generated by referring to the number of times of the heat conduction "201 to 300 times" which are the deterioration information of the battery pack mapped to 200 to 255).

The processor 150 may generate “300 times”, which is the maximum number of times, among “201 to 300 times” of heat conduction that is deterioration information of the battery pack.

Subsequently, the processor 150 determines that the pack degradation degree exceeds the reference pack degradation degree because the reference pack degradation degree is "200 times" and the generated pack degradation degree is "300 times", as described above. The battery pack P may be diagnosed as having deteriorated.

6 is a diagram illustrating an example in which the temperature sensitive unit 110 of the battery management apparatus 100 according to an exemplary embodiment is divided into a plurality of sensing regions.

Referring to FIG. 6, the temperature sensitive unit 110 may be divided into a plurality of sensing regions, and a thermal ink 112 may be printed in each sensing region.

In addition, the moving unit 120 moves the sensing unit 130 to any one sensing region of the upper region of the temperature sensitive unit 110 divided into a plurality of sensing regions according to a control signal of the processor 150. You can move it.

In this case, the processor 150 generates the color information measured for each of the plurality of sensing areas as the integrated color information, compares the integrated color information with the reference color information range, and deteriorates the pack of the battery pack P in response to the comparison result. A diagram may be generated and it may be diagnosed whether the battery pack P is deteriorated based on the degree of deterioration of the pack.

More specifically, the processor 150 may calculate an average value between the measured values of all the color information measured for each of the plurality of sensing areas, and generate the calculated average value as integrated color information.

For example, the color information measured from the thermal ink "A2", "A3" and "A4" of each of the plurality of sensing regions is (R: 15, G: 20, B: 215), (R: 15, G: 20, B: 200) and (R: 15, G: 20, B: 230), the processor 150 calculates an average value between the respective measured values of R, G, and B (R: 15, G: 20, B: 215), and a corresponding average value (R: 15, G: 20, B: 215) can be generated as integrated color information.

Then, when the integrated color information is included in the reference color information range, the processor 150 may refer to the degradation data in which the degradation information of the battery pack is mapped for each reference color information range, and determine a pack degradation degree corresponding to the reference color information range. Can be generated.

At this time, the reference color information ranges are (R: 200 to 255, G: 0 to 50, B: 0 to 50), (R: 0 to 50, G: 200 to 255, B: 0 to 50), and (R: 0 to 50, G: 0 to 50, B: 200 to 255), and as described above, when the integrated color information is (R: 15, G: 20, B: 215), the processor 150 Since the integrated color information is included in the reference color information range, the number of times of heat conduction that is deterioration information of the battery pack mapped to the corresponding reference color information range (R: 0 to 50, G: 0 to 50, and B: 200 to 255) is "201 times. To 300 times "to generate a pack degradation degree.

The processor 150 may generate “300 times”, which is the maximum number of times, among “201 to 300 times” of heat conduction that is deterioration information of the battery pack.

Subsequently, the processor 150 determines that the pack degradation degree exceeds the reference pack degradation degree because the reference pack degradation degree is "200 times" and the generated pack degradation degree is "300 times", as described above. The battery pack P may be diagnosed as having deteriorated.

According to this configuration of the present invention, the battery pack P is quickly and accurately deteriorated by diagnosing whether the battery pack P is deteriorated based on the color information measured from both the partial region and the entire region of the battery pack P. FIG. Diagnosis can be made.

On the other hand, the processor 150 outputs a control signal to the moving unit 130 to control the operation of the moving unit 130, the sensing unit 120 in the upper region of the temperature sensitive unit 110. You can move the position of. To this end, the processor 150 and the mobile unit 130 may transmit and receive a control signal using wired or wireless communication.

The processor 150 may optionally include an application-specific integrated circuit (ASIC), other chipsets, logic circuits, registers, communication modems, data processing devices, and the like, which are known in the art, for executing various control logics. have. Various control logics that may be executed by the processor 150 may be combined with at least one, and the combined control logics may be written in a computer readable code system and stored in a computer readable recording medium. The recording medium is not particularly limited as long as it is accessible by the processor 150 included in the computer. In one example, the recording medium includes at least one selected from the group consisting of a ROM, a RAM, a register, a CD-ROM, a magnetic tape, a hard disk, a floppy disk, and an optical data recording device. In addition, the code scheme may be modulated into a carrier signal to be included in a communication carrier at a particular point in time, and distributed and stored and executed in a networked computer. In addition, functional programs, code and code segments for implementing the combined control logics can be easily inferred by programmers in the art to which the present invention pertains.

The notification unit 160 may receive a diagnosis result of deterioration of the battery pack P from the processor 150 and output the diagnosis result to the outside. More specifically, the notification unit 160 includes at least one of a display unit for displaying a diagnosis result of whether the battery pack P is deteriorated using one or more of symbols, numbers, and codes, and at least one speaker device for outputting sound. can do.

Meanwhile, the battery pack according to the present invention may include the battery management apparatus described above. Through this, the battery pack itself may be diagnosed or deteriorated.

Meanwhile, the vehicle according to the present invention may include the battery management apparatus described above. Through this, it is possible to diagnose whether the battery pack is deteriorated in the vehicle.

The embodiments of the present invention described above are not implemented only through the apparatus and the 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 on which the program is recorded. Implementation may be easily implemented by those skilled in the art from the description of the above-described embodiments.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

In addition, the present invention described above is capable of various substitutions, modifications, and changes within the scope without departing from the spirit of the present invention for those of ordinary skill in the art to which the present invention pertains to the above-described embodiments and attached Not limited by the drawings, all or part of the embodiments may be selectively combined to enable various modifications.

110: temperature sensitive part
120: sensing unit
130: moving part
140: memory section
150: processor
160: notification unit

Claims (8)

A temperature sensitive unit attached to one surface of a battery pack including a plurality of battery cells and changing color in response to heat conduction;
A sensing unit positioned in an upper region of the temperature sensitive unit and measuring image color information from an upper region of the temperature sensitive unit;
A moving unit which moves the sensing unit in an upper region of the temperature sensitive unit; And
A processor configured to compare the color information with a reference color information range, generate a pack degradation degree of the battery pack according to a comparison result, and diagnose whether the battery pack is deteriorated based on the pack degradation degree.
Battery management device comprising.
The method of claim 1,
The processor is
If the color information is the same within the reference color information range, the deterioration data mapped to the deterioration information of the battery pack is mapped to each reference color information range to generate a pack degradation degree corresponding to the reference color information range. Battery management device.
The method of claim 1,
The processor is
And comparing the pack deterioration degree with the reference pack deterioration degree and diagnosing the deterioration of the battery pack when the pack deterioration degree exceeds the reference pack deterioration degree.
The method of claim 1,
The moving part
The sensing unit is moved to any one sensing region of the upper region of the temperature sensitive unit divided into a plurality of sensing regions,
The sensing unit
The battery management device for measuring the color information of the temperature sensitive unit for each of the plurality of sensing areas.
The method of claim 4, wherein
The processor is
Generate color information measured for each of the plurality of sensing areas as integrated color information, compare the integrated color information with a reference color information range, generate a pack degradation degree of the battery pack in response to a comparison result, and deteriorate the pack. A battery management device for diagnosing whether the battery pack is deteriorated based on a diagram.
The method of claim 4, wherein
The processor is
If the integrated color information is the same when included in the reference color information range, a pack degradation degree corresponding to the reference color information range is generated by referring to degradation data in which the degradation information of the battery pack is mapped for each reference color information range. Battery management device.
A battery pack comprising the battery management device according to any one of claims 1 to 6.
An automobile comprising the battery management device according to any one of claims 1 to 6.

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