Battery management device, battery management method, and battery management system

Abstract

According to some embodiments, a battery management device includes: a data acquisition unit configured to acquire battery data from a multi-cell battery pack, the multi-cell battery pack including a main battery pack and one or more sub-cell battery packs; and a control unit configured to determine, based on the battery data, whether there is a low-temperature battery pack in the multi-cell battery pack that is in a low-temperature state, and when a low-temperature battery pack is present, to select a discharge battery pack from the remaining battery packs in the multi-cell battery pack that excludes the low-temperature battery pack based on the battery data, and to supply the power generated by discharging the discharge battery pack to a temperature management device configured to manage the temperature of the low-temperature battery pack.

Description

Technical Field

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2024-0058768, filed on May 2, 2024, the disclosure of which is incorporated herein by reference. Technical Field

[0003] The embodiments disclosed in this document relate to battery management devices, battery management methods, and battery management systems. Background Technology

[0004] Recently, research and development of rechargeable batteries have been actively pursued. Here, rechargeable batteries are batteries that can be charged and discharged, and can be interpreted as including conventional Ni / Cd batteries, Ni / MH batteries, and the more recent lithium-ion batteries. Among rechargeable batteries, lithium-ion batteries can achieve significantly higher energy densities than conventional Ni / Cd and Ni / MH batteries, and can be manufactured in a smaller and lighter form, making them highly usable as power sources for mobile devices. Recently, the application of lithium-ion batteries has expanded to include power sources for electric vehicles, and lithium-ion batteries are attracting attention as a next-generation energy storage medium.

[0005] Electric vehicles can be powered using a multi-battery pack structure that includes one traction battery pack and one or more extension battery packs. In a multi-battery pack structure, problems such as prolonged disuse or temperature drops may occur in some of the two or more battery packs, which could reduce the lifespan or performance of the entire multi-battery pack. Summary of the Invention

[0006] Technical issues

[0007] The embodiments disclosed in this document can provide battery management devices, battery management methods, and battery management systems that can solve problems caused by prolonged disuse or temperature drop in some battery packs in a multi-battery pack structure.

[0008] The technical problems of the embodiments disclosed in this document are not limited to the above-described technical problems, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description.

[0009] Technical solution

[0010] According to some embodiments, a battery management device includes: a data acquisition unit configured to acquire battery data from a multi-cell battery pack, the multi-cell battery pack including a main battery pack and one or more sub-cell battery packs; and a control unit configured to determine, based on the battery data, whether there is a low-temperature battery pack in the multi-cell battery pack that is in a low-temperature state, and when a low-temperature battery pack is present, to select a discharge battery pack from the remaining battery packs in the multi-cell battery pack excluding the low-temperature battery pack based on the battery data, and to supply the power generated by discharging the discharge battery pack to a temperature management device configured to manage the temperature of the low-temperature battery pack.

[0011] According to some implementations, the control unit is configured to compare a first energy and a second energy, the first energy being the energy expected to be saved due to performance improvement caused by the temperature rise of the low-temperature battery pack, and the second energy being the energy expected to be consumed to raise the temperature of the low-temperature battery pack; based on the comparison result of the first energy and the second energy, the power generated by discharging the battery pack is supplied to the temperature management device.

[0012] According to some embodiments, the control unit is configured to calculate a first evaluation score for the saving of the first energy and a second evaluation score for the increase in battery life due to the consumption of the second energy when the first energy is greater than the second energy; and based on the first evaluation score and the second evaluation score, supply the power generated by discharging the battery pack to the temperature management device.

[0013] According to some implementations, the control unit is configured to provide a query message to the user terminal regarding whether to perform temperature management of the low-temperature battery pack when the first energy is greater than the second energy; and to supply power generated by the discharge of the battery pack based on the user's response message to the query message.

[0014] According to some implementations, the control unit is configured to select the battery charger as the discharge battery pack when the battery charger is connected to a multi-battery pack; and to return an amount of electricity equal to the amount supplied from the battery charger to the temperature management device from the low-temperature battery pack to the battery charger to manage the temperature of the low-temperature battery pack.

[0015] According to some implementations, the control unit is configured to provide a message to the user terminal suggesting that at least some of the battery packs in the multi-battery pack be pre-identified as low-temperature battery packs, based on at least one of periodically measured temperature data of the multi-battery pack, expected temperature data based on weather forecasts, and frequency distribution data on the frequency of battery use by the user over time periods.

[0016] According to some implementations, the control unit is configured to select the battery pack to discharge based on the state of charge (SOC), state of health (SOH), and discharge current (C-rate) of each of the remaining battery packs.

[0017] According to some embodiments, a battery management method includes the following steps: acquiring battery data from a multi-cell battery pack, the multi-cell battery pack including a main battery pack and one or more sub-cell battery packs; determining, based on the battery data, whether there is a low-temperature battery pack in the multi-cell battery pack that is in a low-temperature state; when a low-temperature battery pack is present, selecting a discharge battery pack from the remaining battery packs in the multi-cell battery pack that exclude the low-temperature battery pack based on the battery data; and supplying the power generated by discharging the discharge battery pack to a temperature management device configured to manage the temperature of the low-temperature battery pack.

[0018] According to some embodiments, the step of supplying power generated by the discharge of a battery pack includes the following steps: comparing a first energy and a second energy, wherein the first energy is expected to be saved due to performance improvement caused by the temperature rise of the low-temperature battery pack, and the second energy is expected to be consumed in order to raise the temperature of the low-temperature battery pack; and based on the comparison result of the first energy and the second energy, supplying the power generated by the discharge of the battery pack to a temperature management device.

[0019] According to some embodiments, the step of supplying power generated by the discharge of a battery pack includes the following steps: when a first energy is greater than a second energy, calculating a first evaluation score for the saving of the first energy and a second evaluation score for the increase in battery life due to the consumption of the second energy; and supplying power generated by the discharge of the battery pack to a temperature management device based on the first evaluation score and the second evaluation score.

[0020] According to some implementations, the step of supplying power generated by the discharge of a battery pack includes the following steps: when a first energy is greater than a second energy, providing a query message to a user terminal regarding whether to perform temperature management of the low-temperature battery pack; and supplying power generated by the discharge of the battery pack based on a user response message to the query message.

[0021] According to some implementations, the battery management method further includes the following steps: when the battery charger is connected to a multi-battery pack, selecting the battery charger as the discharge battery pack; and returning an amount of electricity equal to the amount supplied from the battery charger to the temperature management device from the low-temperature battery pack to the battery charger to manage the temperature of the low-temperature battery pack.

[0022] According to some implementations, the step of selecting a discharge battery pack includes the following steps: providing a message to a user terminal suggesting that at least some of the battery packs in the multi-battery pack be pre-selected as low-temperature battery packs based on at least one of periodically measured temperature data of the multi-battery pack, expected temperature data based on weather forecasts, and frequency distribution data on the frequency of battery use by the user over time periods.

[0023] According to some implementations, selecting a discharge battery pack includes selecting the discharge battery pack based on the state of charge (SOC), state of health (SOH), and discharge current (C-rate) of each of the remaining battery packs.

[0024] According to some embodiments, a battery management system includes: a multi-cell battery pack including a main battery pack and one or more sub-cell packs; a temperature management device configured to manage the temperature of the multi-cell battery pack; and a battery management device configured to acquire battery data from the multi-cell battery pack, determine based on the battery data whether there is a low-temperature battery pack in the multi-cell battery pack, and if there is a low-temperature battery pack, select a discharge battery pack from the remaining battery packs in the multi-cell battery pack excluding the low-temperature battery pack based on the battery data, and supply the power generated by discharging the discharge battery pack to the temperature management device.

[0025] Beneficial effects

[0026] According to the embodiments disclosed in this document, a battery management device, battery management method, and battery management system can be provided to solve problems caused by long-term disuse or temperature drop in some battery packs in a multi-battery pack structure.

[0027] The technical effects of the embodiments disclosed in this document are not limited to the effects described above, and those skilled in the art will clearly understand other effects not mentioned based on the disclosure in this document. Attached Figure Description

[0028] Figure 1 The components constituting a battery management system according to some implementations are illustrated.

[0029] Figure 2 Examples of components constituting a battery management device according to some embodiments are shown.

[0030] Figure 3 The structure of a multi-cell battery pack according to some embodiments is illustrated.

[0031] Figure 4 An example is illustrated of a process for determining whether a low-temperature battery pack exists in a battery pack of multiple battery packs, according to some embodiments.

[0032] Figure 5 A method for managing the temperature of a low-temperature battery pack according to some embodiments is illustrated.

[0033] Figure 6 The steps of constructing a battery management method according to some embodiments are illustrated. Detailed Implementation

[0034] In the following description, embodiments described in this document are illustrated with reference to the accompanying drawings. However, this is not intended to limit the disclosure of this document to the specific embodiments, but should be understood to include various modifications, equivalents, and / or substitutions of the embodiments described in this document.

[0035] The various embodiments and terminology used in this document are not intended to limit the technical features described herein to specific embodiments, but should be understood to include various modifications, equivalents, or substitutions of the embodiments. Similar reference numerals may be used for similar or related components in conjunction with the description of the accompanying drawings. Unless the context clearly indicates otherwise, the singular form of the noun corresponding to an item may include one or more of the items stated therein.

[0036] In this document, each of the phrases “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “at least one of A, B or C” can include any one of the items listed together in that phrase or all possible combinations thereof. Unless otherwise specifically stated, terms such as “first,” “second,” “firstly,” “secondarily,” “A,” “B,” “(a),” or “(b)” may be used only to distinguish one component from another and do not limit the components in any other way (e.g., in terms of importance or order).

[0037] In this document, when a component (e.g., a first component) is referred to as being “connected,” “joined,” or “attached” to another component (e.g., a second component) with or without the terms “functionally” or “communically”, it means that the component can be directly (e.g., wired or wirelessly) connected to the other component or indirectly (through a third component) connected to the other component.

[0038] Methods according to the various embodiments disclosed in this document can be provided by being included in a computer program product. The computer program product can be traded as a product between a seller and a buyer. The computer program product can be distributed in the form of a machine-readable storage medium (e.g., an optical disc read-only memory (CD-ROM)), or can be distributed online via an app store (e.g., downloaded or uploaded), or directly between two user devices. In the case of online distribution, at least a portion of the computer program product can be temporarily stored or temporarily generated in a machine-readable storage medium such as the memory of a manufacturer's server, an app store's server, or a relay server.

[0039] According to the embodiments disclosed in this document, each of the above-described components (e.g., modules or programs) may include a single entity or multiple entities, and some of the multiple entities may be separated and placed in other components. According to the embodiments disclosed in this document, one or more of the above-described components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as the functions performed by the corresponding components among the multiple components prior to integration. According to the embodiments disclosed in this document, operations performed by modules, programs, or other components may be performed sequentially, in parallel, repeatedly, or heuristically, or may be performed in a different order, omitted, or performed by adding one or more other operations.

[0040] Figure 1 The components constituting a battery management system according to some implementations are illustrated.

[0041] Reference Figure 1 The battery management system 100 may include a multi-battery pack 110, a battery management device 120, and a temperature management device 130. However, the present invention is not limited thereto, and some components may be omitted from the battery management system 100, or other general configurations may be included in the battery management system 100.

[0042] The multi-battery pack battery 110 may include multiple battery packs. The multi-battery pack battery 110 may include a main battery pack and one or more sub-battery packs. The main battery pack may be a traction battery pack, and the sub-battery packs may be extension battery packs. The multi-battery pack battery 110 can be used by electrical-using devices. Electrical-using devices may include mobile devices such as electric vehicles (EVs), hybrid electric vehicles (HEVs), or electric bicycles.

[0043] The battery management device 120 can manage the state of the multi-battery pack 110. Some battery packs in the multi-battery pack 110 may experience temperature fluctuations or prolonged periods of disuse, which may lead to degradation of battery pack life or performance. To prevent this, the battery management device 120 can acquire battery data from the multi-battery pack 110 and perform various management functions based on the acquired battery data.

[0044] Temperature management device 130 can manage the temperature of the multi-cell battery pack 110. For example, temperature management device 130 may include a heater device for raising the temperature of the low-temperature battery pack within the multi-cell battery pack 110. Temperature management device 130 may receive power from a normal battery pack within the multi-cell battery pack 110 or from an external battery charger, and can manage the temperature of the low-temperature battery pack accordingly. Alternatively, temperature management device 130 may include a cooling device for cooling the multi-cell battery pack 110.

[0045] Battery packs may experience performance degradation at low temperatures. When a battery pack is not used for an extended period, its performance may deteriorate and its lifespan may decrease. When using only a single battery pack, management can be performed within the battery pack to address performance degradation. However, since the multi-battery pack 110 operates with two or more battery packs together, it offers greater flexibility in dealing with performance degradation. For example, the battery management system 100 can prevent performance degradation of the battery pack at low temperatures by utilizing power from the normal battery packs.

[0046] Figure 2 Examples of components constituting a battery management device according to some embodiments are shown.

[0047] Reference Figure 2 The battery management device 120 may include a data acquisition unit 121 and a control unit 122. However, the present invention is not limited thereto, and some configurations may be omitted from the battery management device 120, or other general configurations may be included in the battery management device 120.

[0048] The data acquisition unit 121 may include a sensor unit and / or a communication unit. The sensor unit can directly measure battery data from the multi-battery pack 110, and the communication unit can receive battery data from the multi-battery pack 110 measured externally from the battery management device 120. For example, when the battery management device 120 is configured with the multi-battery pack 110 in the form of an in-vehicle BMS, the data acquisition unit 121 may include the sensor unit. Alternatively, when the battery management device 120 is an external device remotely placed relative to the multi-battery pack 110 in a non-in-vehicle manner, the data acquisition unit 121 may include the communication unit. The external device may include a battery charger, a battery management server, etc. According to an embodiment, the battery management server may be implemented as a cloud computing environment.

[0049] The control unit 122 may include memory and / or a processor. The processor may be implemented as at least one of a logic gate array, a microprocessor, a CPU, a GPU, and an application processor (AP). The memory may be implemented as a non-volatile device such as ROM, PROM, EPROM, EEPROM, flash memory, PRAM, MRAM, RRAM, FRAM, etc., or as a volatile device such as DRAM, SRAM, SDRAM, PRAM, etc., and may be implemented as HDD, SSD, SD, micro SD, etc., or combinations thereof.

[0050] The data acquisition unit 121 can be configured to acquire battery data from the multi-battery pack 110, which includes a main battery pack and one or more sub-battery packs. For example, the data acquisition unit 121 can directly measure the battery data from the multi-battery pack 110 via a sensor unit, or it can receive the battery data from the multi-battery pack 110 via a communication unit.

[0051] The control unit 122 can be configured to determine, based on battery data, whether a low-temperature battery pack exists within the multi-cell battery pack 110. The battery data may include time-series data of the voltage, current, temperature, resistance, etc., of the multi-cell battery pack 110 measured at regular intervals. Based on the time-series data, the low-temperature battery pack at the current time point can be identified, and the low-temperature battery pack at future time points can be predicted.

[0052] Control unit 122 can be configured to select a discharge battery pack from the remaining battery packs of the multi-cell battery pack 110, excluding the cryogenic battery pack, based on battery data when a cryogenic battery pack is present. In order to raise the temperature of the cryogenic battery pack to a normal range using temperature management device 130, it may be necessary to supply power to temperature management device 130. To prepare the power to be supplied to temperature management device 130, a discharge battery pack can be selected from the remaining battery packs excluding the cryogenic battery pack based on time-series battery data.

[0053] The control unit 122 can be configured to supply power generated by discharging the battery pack to a temperature management device 130 configured to manage the temperature of the cryogenic battery pack. The control unit 122 can control the switching between the battery pack and the temperature management device 130 to provide power from the battery pack to the temperature management device 130. The temperature management device 130 can perform a heating function to increase the temperature of the cryogenic battery pack.

[0054] According to an embodiment, the control unit 122 can be configured to compare a first energy and a second energy. The first energy is the energy expected to be saved due to performance improvement caused by the temperature rise of the cryogenic battery pack, and the second energy is the energy expected to be consumed to raise the temperature of the cryogenic battery pack. Based on the comparison of the first and second energies, the power generated by discharging the battery pack is supplied to the temperature management device 130. When the temperature of the battery pack drops, the output of the battery pack may decrease. Therefore, when the temperature of the cryogenic battery pack increases through temperature management, the output of the battery pack can increase again. A mapping relationship between temperature and performance can be established in advance, and this mapping relationship can be used to calculate the first energy. To obtain the first energy, the second energy consumed during the process of transferring power from the discharging battery pack to the cryogenic battery pack using the temperature management device 130 may be required. By comparing the first and second energies, a heating function can be executed to increase the temperature of the cryogenic battery pack when the second energy is greater than a certain ratio of the first energy. For example, by balancing the performance and energy efficiency of the multi-cell battery pack 110, the specific ratio can be set to 0.7, 0.8, 0.9, or any other suitable value.

[0055] According to an embodiment, the control unit 122 can be configured to calculate a first evaluation score regarding the saving of the first energy and a second evaluation score regarding the increase in battery life due to the consumption of the second energy when the first energy is greater than the second energy, and to supply the power generated by discharging the battery pack to the temperature management device 130 based on the first evaluation score and the second evaluation score. When comparing the first energy and the second energy, specific ratios such as 0.7, 0.8, or 0.9 mentioned above can be applied. When comparing the first energy and the second energy, even if performing temperature management on a low-temperature battery pack may be disadvantageous from an energy perspective, it may be necessary from a battery life perspective. To determine this, the first evaluation score and the second evaluation score can be calculated using a pre-prepared mapping table, etc. When the second evaluation score is greater than the first evaluation score, it can be determined that performing temperature management from a battery life perspective is more advantageous, and temperature management for the low-temperature battery pack can be performed by discharging the battery pack.

[0056] According to an embodiment, the control unit 122 can be configured to provide a query message to a user terminal regarding whether to perform temperature management on the low-temperature battery pack when the first energy is greater than the second energy, and to supply power generated by discharging the battery pack based on the user's response message to the query message. Even if performing temperature management on the low-temperature battery pack is disadvantageous from both energy efficiency and battery life perspectives, there may be situations where temperature management needs to be performed based on user determination. For this purpose, a query message can be sent to a user terminal such as a pre-registered mobile device or PC.

[0057] According to an embodiment, the control unit 122 can be configured to select the battery charger as the discharge battery pack when the battery charger is connected to the multi-battery pack 110, and to return an amount of electricity equal to the amount supplied from the battery charger to the temperature management device 130 from the cryogenic battery pack back to the battery charger in order to manage the temperature of the cryogenic battery pack. When the battery charger is connected, instead of selecting the discharge battery pack within the multi-battery pack 110, the battery charger can act as a power source. In this case, an equal amount of electricity can be returned to the battery charger to compensate for the power supplied by the battery charger. The power returned to the battery charger can be provided by the cryogenic battery pack.

[0058] According to an embodiment, the control unit 122 can be configured to provide a message to a user terminal suggesting that at least some of the battery packs in the multi-battery pack 110 be pre-identified as low-temperature battery packs, based on at least one of periodically measured temperature data of the multi-battery pack 110, expected temperature data based on weather forecasts, and frequency distribution data regarding the user's battery usage frequency by time period. Based on the periodic temperature data, the trend of battery temperature can be estimated, and based on this, it can be predicted that a particular battery pack will be in a low-temperature state at a future time. Additionally, fluctuations in the external temperature of the battery can be predicted based on weather forecasts. Furthermore, the time period during which the battery will be used can be predicted based on the frequency distribution data. By combining these predictions, a particular battery pack can be pre-identified as a low-temperature battery pack at a future time, and a suggestion message for user confirmation can be sent to the user terminal.

[0059] According to an implementation, the control unit 122 can be configured to select a discharge battery pack based on the state of charge (SOC), state of health (SOH), and discharge current (C-rate) of each of the remaining battery packs. To maintain a balance in the overall lifespan and performance of the multi-cell battery pack 110 among the battery packs, the SOC, SOH, and C-rate values ​​of each battery pack can be used when selecting the discharge battery pack. For example, the battery pack with the optimal SOC, SOH, and / or C-rate can be selected as the discharge battery pack.

[0060] Figure 3 The structure of a multi-cell battery pack according to some embodiments is illustrated.

[0061] Reference Figure 3 The multi-battery pack 110 may include a traction battery 111 and one or more extension batteries 112a to 112n. One or more DC-DC converters 113a to 113n may be connected to one or more extension batteries 112a to 112n. The traction battery 111 may correspond to the main battery pack, and one or more extension batteries 112a to 112n may correspond to one or more sub-battery packs.

[0062] The control unit of the battery management device 120 and / or the multi-battery pack 110 can control the first switch SW1 and the second switch SW2, etc., to select the battery pack connected to the input / output port I / O. For example, when the second extended battery 112b is selected as the discharge battery pack, the first switch SW1 and / or the second switch SW2 can be turned off, and the discharge power of the second extended battery 112b can be supplied to the temperature management device 130 through the second DC-DC converter 113b.

[0063] Figure 4An example is illustrated of a process for determining whether a low-temperature battery pack exists in a battery pack of multiple battery packs, according to some embodiments.

[0064] Reference Figure 4 When it is determined that a low-temperature battery pack exists in the battery pack of the multi-battery pack 110, the operation 440 of the low-temperature battery pack management system can be executed, and the operation 440 of the low-temperature battery pack management system can be executed by any one of the first method 410, the second method 420 and the third method 430.

[0065] In the first method 410, a user of the multi-battery pack battery 110 or a mobile device including it can manually configure the operation of the management system via user manual setting 411. Upon receiving manual setting input, the battery management system 100 can determine whether a cryogenic battery pack exists and can perform heating on the cryogenic battery pack by sending power from the discharged battery pack to the temperature management device 130. Alternatively, even if it is determined that a cryogenic battery pack does not exist, the user can manually set at least some of the battery packs in the multi-battery pack battery 110 as cryogenic battery packs. The user can use a user terminal to receive various messages from the battery management system 100 or send command messages to the battery management system 100 via wired / wireless data communication.

[0066] In the second method 420, weather or temperature information for future time points can be collected via weather forecast data collection 421. When it is anticipated that a specific battery pack will enter a cryogenic state at a future time point based on periodically measured time-series battery data and / or weather forecast data, a message suggesting setting the battery pack as a cryogenic battery pack at the current time point and / or future time points can be sent to the user terminal via suggestion message sending 422, and cryogenic battery pack management can be performed based on the user's response to the message 423.

[0067] In the third method 430, temperature trends can be analyzed from time-series battery data through battery temperature collection 431, and periods of frequent battery use by the user can be analyzed through battery usage frequency analysis 432. Based on these, a message suggesting the implementation of low-temperature battery pack management at specific time periods can be sent to the user terminal through suggestion message sending 433, and low-temperature battery pack management can be implemented based on the user's response to the message 434.

[0068] Figure 5 A method for managing the temperature of a low-temperature battery pack according to some embodiments is illustrated.

[0069] Reference Figure 5 Example 500 illustrates a method for managing the temperature of a low-temperature battery pack.

[0070] In step 502, it can be determined whether a cryogenic battery pack exists. If no cryogenic battery pack exists, process 500 can end in step 504. If a cryogenic battery pack exists, it can be determined in step 506 whether a battery charger is connected to the multi-battery pack 110. When a battery charger is connected, in step 508, the battery charger can be used as a discharging battery pack to supply temperature management power. When the battery charger is not connected, in step 510, a discharging battery pack can be selected from the remaining battery packs in the multi-battery pack 110, excluding the cryogenic battery pack.

[0071] When either the battery charger or the remaining battery pack is selected as the discharge battery pack, in step 512, the energy savings due to temperature management (first energy) and the energy consumption for temperature management (second energy) can be compared with each other. The first energy and the second energy can be compared directly with each other, or the value obtained by multiplying the second energy by a specific ratio having a value between 0 and 1 can be compared with the first energy. When the energy savings are determined to be higher, in step 514, power from the discharge battery pack can be transferred to the temperature management device 130.

[0072] When higher energy consumption is determined, in step 516, a first assessment score regarding energy savings and a second assessment score regarding increased lifespan can be compared with each other. If the first assessment score regarding energy savings is higher, in step 518, power from the discharged battery pack can be transferred to the temperature management device 130. If the second assessment score regarding increased lifespan is higher, in step 520, an inquiry message can be sent to the user terminal.

[0073] Figure 6 The steps of constructing a battery management method according to some embodiments are illustrated.

[0074] Reference Figure 6 The battery management method 600 may include steps 610 to 640. However, the invention is not limited thereto, and some steps may be omitted or other general steps may be added, and the steps of the battery management method 600 may be performed in a different order than that shown.

[0075] The battery management method 600 may consist of steps processed sequentially in the battery management device 120. Therefore, even if the following description is omitted, the content described above for the battery management device 120 can also be applied to the battery management method 600.

[0076] Steps 610 to 640 of the battery management method 600 can be executed by the data acquisition unit 121 and the control unit 122 of the battery management device 120.

[0077] In step 610, the battery management device 120 may perform the step of acquiring battery data from a multi-battery pack, which includes a main battery pack and one or more sub-battery packs.

[0078] In step 620, the battery management device 120 may perform the step of determining, based on battery data, whether there is a low-temperature battery pack in the multi-cell battery pack that is in a low-temperature state.

[0079] In step 630, the battery management device 120 may perform the step of selecting a discharge battery pack from the remaining battery packs that have excluded the low-temperature battery pack when a low-temperature battery pack exists, based on battery data.

[0080] In step 640, the battery management device 120 may perform the step of supplying the power generated by discharging the battery pack to a temperature management device configured to manage the temperature of the low-temperature battery pack.

[0081] According to this embodiment, the battery management method 600 can be implemented as a computer program stored in a computer-readable storage medium. That is, the computer program may include instructions for implementing the battery management method 600, and the instructions may be stored in a computer-readable storage medium. The computer program may include a mobile application.

[0082] According to embodiments, computer-readable storage media may include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical media such as CD-ROMs and DVDs; magneto-optical media such as optical discs; and hardware devices specifically configured to store and execute computer program instructions, such as ROMs, RAMs, and flash memory. Computer program instructions may include machine language code generated by a compiler and high-level language code that can be executed by a computer using an interpreter.

[0083] Unless otherwise specifically stated to the contrary, the terms "comprising," "configured," or "having" described above mean that they may include the corresponding components and should therefore be interpreted as including other components rather than excluding them. Unless otherwise defined, all terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments disclosed in this document pertain. Unless expressly defined in this document, commonly used terms (such as those defined in dictionaries) should be interpreted as consistent with the meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense.

[0084] The above description is merely an illustrative description of the technical concepts disclosed in this document, and those skilled in the art can make various modifications and changes to the embodiments disclosed in this document without departing from the basic characteristics of the embodiments disclosed in this document. Therefore, the embodiments disclosed in this document are not intended to limit the technical concepts of the embodiments disclosed in this document, but rather to interpret them, and the scope of the technical concepts disclosed in this document is not limited by these embodiments. The scope of protection of the technical concepts disclosed in this document should be interpreted by the appended claims, and all technical concepts within the equivalent scope should be interpreted as being included within the scope of the rights in this document.

[0085] [Description of the symbol]

[0086] 100: Battery Management System; 110: Multi-Battery Pack Battery

[0087] 120: Battery management device; 121: Data acquisition unit

[0088] 122: Control unit; 130: Temperature management device

Claims

1. A battery management device, the battery management device comprising: A data acquisition unit is configured to acquire battery data from a multi-battery pack, the multi-battery pack including a main battery pack and one or more sub-battery packs. as well as A control unit is configured to determine, based on the battery data, whether there is a low-temperature battery pack in the battery pack of the multi-battery pack, and when the low-temperature battery pack exists, to select a discharge battery pack from the remaining battery packs in the multi-battery pack based on the battery data, and to supply the power generated by the discharge of the discharge battery pack to a temperature management device configured to manage the temperature of the low-temperature battery pack.

2. The battery management device according to claim 1, wherein, The control unit is configured to: Compare the first energy and the second energy, where the first energy is the energy expected to be saved due to the performance improvement caused by the temperature rise of the low-temperature battery pack, and the second energy is the energy expected to be consumed in order to raise the temperature of the low-temperature battery pack. Based on the comparison between the first energy and the second energy, the power generated by the discharge of the discharge battery pack is supplied to the temperature management device.

3. The battery management device according to claim 2, wherein, The control unit is configured to: When the first energy is greater than the second energy, a first evaluation score is calculated regarding the saving of the first energy and a second evaluation score is calculated regarding the increase in battery life due to the consumption of the second energy; and Based on the first evaluation score and the second evaluation score, the power generated by the discharge of the discharge battery pack is supplied to the temperature management device.

4. The battery management device according to claim 2, wherein, The control unit is configured to: When the first energy is greater than the second energy, an inquiry message is provided to the user terminal regarding whether to perform temperature management of the low-temperature battery pack; and Based on the user's response to the query message, the power generated by the discharge of the battery pack is supplied.

5. The battery management device according to claim 1, wherein, The control unit is configured to: When the battery charger is connected to the multi-battery pack, the battery charger is selected as the discharging battery pack; and An amount of electricity equal to the amount supplied from the battery charger to the temperature management device is returned from the cryogenic battery pack to the battery charger to manage the temperature of the cryogenic battery pack.

6. The battery management device according to claim 1, wherein, The control unit is configured to provide a message to the user terminal suggesting that at least some of the battery packs in the multi-battery pack be pre-identified as the low-temperature battery pack, based on at least one of periodically measured temperature data of the multi-battery pack, expected temperature data based on weather forecasts, and frequency distribution data regarding the user's battery usage frequency by time period.

7. The battery management device according to claim 1, wherein, The control unit is configured to select the discharge battery pack based on the state of charge (SOC), state of health (SOH), and discharge current rate (C) of each of the remaining battery packs.

8. A battery management method, the battery management method comprising the following steps: Acquire battery data from a multi-cell battery pack, which includes a main battery pack and one or more sub-cell battery packs. Based on the battery data, determine whether there is a low-temperature battery pack in the multi-battery pack that is in a low-temperature state. When the low-temperature battery pack is present, based on the battery data, a discharge battery pack is selected from the remaining battery packs in the multi-battery pack, excluding the low-temperature battery pack. as well as The power generated by the discharge of the battery pack is supplied to a temperature management device configured to manage the temperature of the cryogenic battery pack.

9. The battery management method according to claim 8, wherein, The step of supplying the electricity generated by the discharge of the battery pack includes the following steps: Comparing the first energy and the second energy, the first energy is the energy expected to be saved due to performance improvement caused by the temperature rise of the low-temperature battery pack, and the second energy is the energy expected to be consumed to raise the temperature of the low-temperature battery pack; and Based on the comparison between the first energy and the second energy, the power generated by the discharge of the discharge battery pack is supplied to the temperature management device.

10. The battery management method according to claim 9, wherein, The step of supplying the electricity generated by the discharge of the battery pack includes the following steps: When the first energy is greater than the second energy, calculate a first evaluation score for the saving of the first energy and a second evaluation score for the increase in battery life due to the consumption of the second energy; and Based on the first evaluation score and the second evaluation score, the power generated by the discharge of the discharge battery pack is supplied to the temperature management device.

11. The battery management method according to claim 9, wherein, The step of supplying the electricity generated by the discharge of the battery pack includes the following steps: When the first energy is greater than the second energy, an inquiry message is provided to the user terminal regarding whether to perform temperature management of the low-temperature battery pack; and Based on the user's response to the query message, the power generated by the discharge of the battery pack is supplied.

12. The battery management method according to claim 8, further comprising the following steps: When the battery charger is connected to the multi-battery pack, the battery charger is selected as the discharge battery pack; as well as An amount of electricity equal to the amount supplied from the battery charger to the temperature management device is returned from the cryogenic battery pack to the battery charger to manage the temperature of the cryogenic battery pack.

13. The battery management method according to claim 8, wherein, The step of selecting the discharge battery pack includes the following steps: providing a message to the user terminal suggesting that at least some of the battery packs in the multi-battery pack be pre-selected as the low-temperature battery pack, based on at least one of periodically measured temperature data of the multi-battery pack, expected temperature data based on weather forecasts, and frequency distribution data on the user's battery usage frequency by time period.

14. The battery management method according to claim 8, wherein, The step of selecting the discharge battery pack includes the following steps: selecting the discharge battery pack based on the state of charge (SOC), state of health (SOH), and discharge current (C-rate) of each of the remaining battery packs.

15. A battery management system, the battery management system comprising: A multi-battery pack battery, wherein the multi-battery pack battery includes a main battery pack and one or more sub-battery packs; A temperature management device configured to manage the temperature of the multi-battery pack; as well as A battery management device is configured to acquire battery data from the multi-battery pack, determine based on the battery data whether there is a low-temperature battery pack in the multi-battery pack, and if there is a low-temperature battery pack, select a discharge battery pack from the remaining battery packs in the multi-battery pack, excluding the low-temperature battery pack, based on the battery data, and supply the power generated by discharging the discharge battery pack to the temperature management device.

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