KR20220036840A - Methods and systems for charging a hybrid battery pack - Google Patents

Abstract

The present invention relates to a method and system for charging a hybrid battery pack to maximize an achievable charge level of the hybrid battery pack for a charging period. According to the present invention, a battery management system (BMS) determines a current split ratio for allocating a charging current to at least one energy cell and at least one power cell on the basis of at least one of a state of charge (SoC) level of the at least one energy cell in a hybrid battery pack determined at start of charging, an SoC level of the at least one power cell in the hybrid battery pack determined at the start of charging, the wattage of an adapter used to charge the hybrid battery pack, the capacity of the hybrid battery pack, and a determined charging time period. The hybrid battery pack is charged by allocating the charging current to the at least one energy cell and the at least one power cell according to the current division ratio determined by the BMS.

Description

Methods and systems for charging a hybrid battery pack

The present disclosure relates to charging of a battery pack, and more particularly to a method and system for managing current supply to energy cells and power cells of a hybrid battery pack for charging the hybrid battery pack.

Currently, power consumption of user devices such as smart phones, Internet of Things (IoT) devices, and wearable devices is increasing. This is especially due to the increased ability of devices to perform various functions. Efforts are being made to increase battery capacity or allow for faster charging to meet the growing power demand. This reduces the time required to charge the user device's battery and maximizes battery life.

One of the most widely used means to reduce charging time is to increase the power density of the cell (battery). However, in order to increase the power density, it is generally necessary to use a power cell with a low capacity/energy density, thus shortening the usage time. To overcome this, multiple power cells are often used to increase the overall battery capacity. However, this sacrifices the volume occupied by several power cells. On the other hand, an energy cell has a larger capacity but a slower charge/discharge rate.

Energy cells increase the capacity of the battery pack, but the charging time of the energy cells is generally long. This may be inconvenient to the user, especially if the user wants to quickly charge the battery pack in an emergency. On the other hand, a power cell can charge faster, but the charge may not last long due to a power cell with a smaller capacity. Devices that use power cells cannot charge to a higher capacity, even if the user doesn't care about the time required to charge the battery pack to full capacity. There is no way for a device to deliver current to an energy cell or power cell to achieve the desired ratio of device usage time to charging time and to charge the battery pack to the desired level.

A main object of the embodiments of the present disclosure is to disclose a method and a system for providing a hybrid battery pack including at least one energy cell and at least one power cell, wherein at least one energy cell and at least one power cell are provided. The delivered charge current is split according to a dynamic current split ratio, which maximizes the achievable charge level of the hybrid battery pack when charged during the charging period.

Another object of the present disclosure is to select a current split ratio capable of rapidly charging a hybrid battery pack to a desired charging level by a user within a charging time constraint set by the user, and to increase the hybrid battery pack to a maximum capacity within the shortest possible charging time. to be charged with

Another object of the embodiments of the present disclosure is a wattage of an adapter used to charge a hybrid battery pack, a State of Charge (SoC) of at least one power cell when charging is started, and at least one Determining an optimal current split ratio based on the SoC of the energy cell, wherein the optimal value of the current split ratio is the SoC value of at least one power cell and at least one energy cell when charging is started and for charging the hybrid battery pack Varies based on *?* change in wattage of adapter used.

Accordingly, an embodiment provides a charging current to at least one energy cell and at least one power cell of the hybrid battery pack to achieve the highest possible charging level when the hybrid battery pack is charged for a determined charging time period. A method and system for dispensing are provided. An embodiment includes distributing a charging current to the energy cell and the power cell according to a current split ratio, wherein a portion of the charging current is allocated to the energy cell and a remaining portion of the charging current is allocated to the power cell. When the charging current is divided, the charging percentage (charged level) of the hybrid battery pack can be increased to the maximum achievable level within the charging period to allocate to the energy cells and power cells according to the appropriate current division ratio, and fast charging becomes possible .

The current split ratio is dynamic and depends on factors such as the wattage of the adapter used to charge the hybrid battery pack, the capacity of the energy cell and power cell, and the SoC level of the energy cell and power cell when the charging procedure is initiated. An embodiment determines the current split ratio if there is a change in at least one of the wattage of the adapter used to charge the hybrid battery pack, the capacity of the energy cell and the power cell, and the SoC level of the energy cell and the power cell when charging begins includes doing

An embodiment includes obtaining a plot showing variations in the percentage of charge of a hybrid battery pack versus time for different current split ratios. Variation is limited by the wattage of the adapter used to charge the hybrid battery pack, the capacity of the energy cells and power cells, and the SoC levels of the energy cells and power cells at the start of the charging procedure. An embodiment includes obtaining a variant using an equivalent circuit model describing a hybrid battery pack. The equivalent circuit model is based on the electrochemical model for the individual cells of the hybrid battery pack. For a specific combination of adapter wattage, capacity of energy cell and power cell, SoC level of energy cell and power cell before charging, and current split ratio, embodiments include determining charging duration to achieve different charging percentages do.

A method of charging a hybrid battery pack according to an embodiment of the present disclosure includes at least one energy cell in a hybrid battery pack when charging is started by a battery management system (BMS). ) of the determined State of Charge (SoC) level, the determined state of charge level of at least one power cell in the hybrid battery pack at the start of charging, and the wattage of the adapter used to charge the hybrid battery pack. Current for allocating a charging current to the at least one energy cell and the at least one power cell based on one or more of a wattage, a capacity of the hybrid battery pack, and a determined charging time period determining a current split ratio; and charging the hybrid battery pack by allocating a charging current to the at least one energy cell and the at least one power cell according to a current split ratio determined by the battery management system.

In this case, the charging period may include: a user input for designating a charging period; and a usage pattern of a device hosting the battery management system, a charging start time (time instance), a user's urgency at the charging start time, and user activity at the charging start time ( user activity) may be determined based on at least one of the predicted values of the charging period derived based on at least one of the following.

In this case, the current split ratio is determined based on a plurality of plots, and each of the plurality of plots represents a change in a charge percentage of the hybrid battery pack with time for different current split ratios, the state of charge level of the at least one energy cell at the start of charging, the state of charge level of the at least one power cell at the beginning of charging, the wattage of an adapter used to charge the hybrid battery pack and the capacity of the hybrid battery pack can be constrained by a combination of

In this case, the method of charging a hybrid battery pack further comprises selecting a plot from among the plurality of plots, wherein the selected plot is the determined state of charge of the at least one energy cell in the hybrid battery pack at the start of charging. level, the determined state of charge level of the at least one power cell in the hybrid battery pack at the start of charging, the wattage of an adapter used to charge the hybrid battery pack, and the capacity of the hybrid battery pack .

In this case, the method of charging the hybrid battery pack further includes selecting one of the current split ratios from the selected plot as the determined current split ratio, wherein the percentage of charging is determined according to the selected current split ratio. A maximum value may be achieved within the charging period by allocating a charging current to the at least one energy cell and the at least one power cell.

In this case, the method of charging the hybrid battery pack may include: determining correlations between a charging period and a current split ratio; and predicting a current split ratio based on a correlation between the charging period and the current split ratio.

A battery management system according to an embodiment of the present disclosure includes a determined state of charge level of at least one energy cell in a hybrid battery pack when charging starts, and a determined state of charge of at least one power cell in the hybrid battery pack when charging begins. the at least one energy cell based on one or more of a level, a wattage of an adapter used to charge the hybrid battery pack, a capacity of the hybrid battery pack, and a determined charging time period; and determining a current split ratio for allocating a charging current to the at least one power cell, and allocating a charging current to the at least one energy cell and the at least one power cell according to the determined current split ratio It contains a processor that charges the hybrid battery pack.

In this case, the processor includes a user input for designating a charging period for the charging time, a usage pattern of a device hosting the battery management system, a charging start time (time instance), and the charging start It may be determined based on at least one of a predicted value of the charging period derived based on at least one of urgency of the user at the time of charging, and user activity at the time of starting charging.

In this case, the battery management system further includes a memory for storing a plurality of plots, wherein the processor determines the current division ratio based on the plurality of plots, and each of the plurality of plots includes a different current represents the change in the percentage of charge of the hybrid battery pack over time with respect to the split ratio, the state of charge level of the at least one energy cell at the start of charging, the state of charge level of the at least one power cell at the beginning of charging, the may be constrained by the combination of the wattage of the adapter used to charge the hybrid battery pack and the capacity of the hybrid battery pack.

In this case, the processor is further configured to: among the plurality of plots, the determined state of charge level of the at least one energy cell in the hybrid battery pack at the beginning of charging, the determined charging of the at least one power cell in the hybrid battery pack at the beginning of charging, among the plurality of plots. A plot may be selected that corresponds to a state level, the wattage of an adapter used to charge the hybrid battery pack, and the capacity of the hybrid battery pack.

In this case, the processor selects one of the current split ratios from the selected plot as the determined current split ratio, and the percentage of the charge is determined by the at least one energy cell and the at least one of the at least one energy cell according to the selected current split ratio. A charging current can be allocated to the power cell to achieve a maximum value within the charging period.

In this case, the processor may determine correlations between the charging period and the current split ratio, and predict the current split ratio based on the correlation between the charging period and the current split ratio.

A portable terminal for charging a hybrid battery pack according to another embodiment of the present disclosure includes: a hybrid battery pack including at least one energy cell and at least one power cell; a storage unit for storing a plurality of plots; a current division ratio determining unit that selects one of the plurality of plots and determines a current division ratio using the selected plot; and a divider configured to charge the hybrid battery pack by allocating a charging current to the at least one energy cell and the at least one power cell according to the determined current division ratio, wherein each of the plurality of plots has a different current division ratio. It represents the change in the percentage of charge of the hybrid battery pack with time.

At this time, the portable terminal for charging the hybrid battery pack is used to charge the determined state of charge level of the at least one energy cell at the start of charging, the determined state of charge level of the at least one power cell at the start of charging, and the hybrid battery pack a parameter checking unit for checking the wattage of the adapter and the capacity of the hybrid battery pack; and a charging period determining unit for determining a charging period, wherein the current split ratio determining unit comprises: a determined state of charge level of the at least one energy cell at the start of charging, a determined state of charge level of the at least one power cell at the beginning of charging allocating a charging current to the at least one energy cell and the at least one power cell based on one or more of the wattage of an adapter used to charge the hybrid battery pack, a capacity of the hybrid battery pack, and a determined charging period to determine the current division ratio for

In this case, the portable terminal for charging the hybrid battery pack includes: a pattern checking unit for checking a user's usage pattern of the portable terminal; an urgency checking unit that determines whether there is an urgency according to the usage pattern at a charging start time; and an activity confirmation unit for confirming user activity according to the movement of the portable terminal at the charging start time, wherein the charging period determining unit includes the user input for designating a chargeable period, the usage pattern of the portable terminal, and charging The charging based on at least one of a predicted value of the charging period derived based on at least one of a start time, the urgency of the user at the charging start time, and the user activity at the charging start time period can be determined.

In this case, each of the plurality of plots includes a state-of-charge level of the at least one energy cell at the start of charging, a state-of-charge level of the at least one power cell at the start of charging, and the wattage of the adapter used to charge the hybrid battery pack. may be constrained by a combination of the number and the capacity of the hybrid battery pack.

In this case, the current division ratio determining unit is configured to: among the plurality of plots, the determined SoC level of the at least one energy cell in the hybrid battery pack at the start of charging, the at least one power cell in the hybrid battery pack at the start of charging. A plot may be selected that corresponds to the determined SoC level, the wattage of an adapter used to charge the hybrid battery pack, and the capacity of the hybrid battery pack.

In this case, the current split ratio determining unit selects one of the current split ratios from the selected plot as the determined current split ratio, and the percentage of the charge is determined by the at least one energy cell and the selected current split ratio according to the selected current split ratio. A maximum value may be achieved within the charging period by allocating a charging current to the at least one power cell.

In this case, the current split ratio determiner may determine a correlation between the charging period and the current split ratio, and predict the current split ratio based on the correlation between the charging period and the current split ratio.

In this case, the energy cell may have a higher capacity density than the power cell and a lower power density than that of the power cell.

1A and 1B are exemplary graphs illustrating changes in percentage of charge of a hybrid battery pack with respect to charging periods for different current split ratios (insertion), according to an embodiment.
2A-2D are exemplary graphs illustrating an optimal current split ratio and a surface plot of a charging period required to fully or partially charge a hybrid battery pack to an optimal current split ratio, according to an embodiment.
3 illustrates a battery management system (BMS) configured to determine an optimal current split ratio for allocating current to energy cells and power cells of a hybrid battery pack for charging the hybrid battery pack, according to an embodiment.
4 is a use case scenario illustrating the division of a charging current between an energy cell and a power cell of a smart phone, according to an embodiment.
5 is a flowchart illustrating a method of charging a hybrid battery pack by allocating a charging current to an energy cell and a power cell of the hybrid battery pack, according to an exemplary embodiment.
Here, the charging current is allocated to the divided energy cell and the power cell according to an optimal current division ratio according to the embodiments disclosed herein.
6 is a diagram illustrating a configuration of a portable terminal for charging a hybrid battery pack, according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all modifications, equivalents and substitutes for the embodiments are included in the scope of the rights.

The terms used in the examples are used for the purpose of description only, and should not be construed as limiting. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate that a feature, number, step, operation, component, part, or a combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In addition, in the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In describing the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

Components included in one embodiment and components having a common function will be described using the same names in other embodiments. Unless otherwise stated, descriptions described in one embodiment may be applied to other embodiments as well, and detailed descriptions within the overlapping range will be omitted.

Hereinafter, according to an embodiment of the present invention A hybrid battery pack charging method and system will be described in detail with reference to the accompanying FIGS. 1 to 6 .

An embodiment of the present disclosure discloses a method and system for allocating a charging current to at least one energy cell and at least one power cell of a hybrid battery pack. In this case, the energy cell is a cell having a high capacity density or high energy density, and is also called a “high energy cell”. A power cell is a cell having a high power density, and is also referred to as a “high power cell”. The energy cell has a higher capacity density than the 　 power cell and a lower power density than the power cell. Energy density is the amount of energy that can be stored within a given mass of matter or system. The higher the energy density, the greater the amount of energy stored. Power density is the amount of power per unit volume. Because the energy cell has a high energy density, it supplies low power for a long time. That is, the energy cell has a slow discharge rate. Therefore, energy cells are advantageous in cases where energy has to be provided for a long period of time, such as a battery in a cell phone. Since the power cell has a high power density, it supplies high power for a short time. That is, the power cell has a high discharge rate. Therefore, the power cell is advantageous when it is necessary to supply high power for a short time, such as when starting or accelerating a vehicle. In addition, the charging current is allocated to an energy cell and a power cell according to a dynamic current division ratio. The current split ratio is determined by at least one of the State of Charge (SoC) level of the energy cell and the power cell at the start of charging the hybrid battery pack, the wattage of the adapter used to charge the hybrid battery pack, the capacity of the energy cell and the power cell; and a charging time period during which charging should be completed. The charging period can be set by the user. If the user has not set a charging period, the charging period can be selected automatically. When the charging current is allocated to the energy cell and the power cell according to the current split ratio, the hybrid battery pack can be charged to the maximum achievable level within the charging period. The embodiment divides the charging current allocated to the energy cell and the power cell according to the optimal current division ratio to enable fast charging and increase the capacity of the hybrid battery pack.

An embodiment is at least one of the wattage of the adapter used to charge the hybrid battery pack, the SoC level of the energy cell and the SoC level of the power cell when charging the hybrid battery pack, and the capacity of the energy cell and the power cell. If there is a variation, it involves recrystallizing the optimal value of the current split ratio. Changes may affect the charge rate of the hybrid battery pack and the current value of the current split rate may no longer be optimal. Accordingly, at least one of the wattage of the adapter used to charge the hybrid battery pack, the SoC level of the energy cell and the SoC level of the power cell when charging the hybrid battery pack, and the capacity of the energy cell and the power cell of the hybrid battery pack. When there is a change in , the optimal value of the current split ratio is determined.

1A and 1B are exemplary graphs illustrating changes in percentage of charge of a hybrid battery pack with respect to charging periods for different current split ratios (insertion), according to an embodiment. The percentage of charge (y-axis) represents the level at which the hybrid battery pack was charged with respect to the total capacity of the hybrid battery pack, and the time (x-axis) represents the elapsed time for charging the hybrid battery pack to various levels. Each graph represents several changes in the charge rate versus time for different current split rates shown in the inset of the graph.

The current split ratio is expressed by indicating a percentage of the current allocated to the power cells of the hybrid battery pack. For example, an interpolated 10% indicates that 10% of the charging current is allocated to the power cell. Thus, 90% of the charging current is allocated to the energy cells of the hybrid battery pack. The change in the charge rate over time depends on the wattage of the adapter used to charge the hybrid battery pack, the SoC level of the energy cell and the SoC level of the power cell when charging the hybrid battery pack, and the energy cell and power cell of the hybrid battery pack. is obtained for a combination of doses.

The change in the charge ratio over time for different current split ratios affects the charge capacity (including energy cell capacity and power cell capacity) of the hybrid battery pack, the energy when charged (expressed as capacity), the SoC level of the cell and the power cell, and the charge It is obtained for the specific combination of wattage of the adapter used. In this example, the charging capacity of the hybrid battery pack is 4.95 Ah (amperes x hours), the capacity of the energy cell is 3.3 Ah and the power cell is 1.65 Ah, and the normalized SoC level of the energy cell and the power cell is 0 ( hybrid battery pack discharged/empty).

As shown in Figure 1a, when the charging current assigned to the current cell is greater than 40%, using an adapter with a wattage of 30W (watts), the charging percentage is 65%, i.e. for the 4.95Ah capacity 3.2Ah, and the charging time is 30 minutes (30 minutes have elapsed to charge the hybrid battery pack to 65% of its total capacity) When the charging current currently assigned to the cell is less than 40% (10%, 20%, 30%, 40%), the charging time required to charge the hybrid battery pack to 65% of its total capacity is more than 30 minutes.

As shown in Figure 1b, when the charging current currently assigned to the cell is greater than 80%, using an adapter with a wattage of 50W, the charge percentage is 92%. That is, for a capacity of 4.95Ah, it is 4.6Ah and a charging time of 30 minutes (30 minutes has elapsed to charge the hybrid battery pack to 92% of its total capacity). If the charging current currently assigned to the cell is less than 80%, the charging time required to charge the hybrid battery pack to 92% of full capacity is more than 30 minutes.

In an embodiment of the present specification, the change in the charge percentage of the hybrid battery pack with time for different current split ratios may be obtained through a hybrid battery pack model in consideration of detailed electrochemical and geometric characteristics of the hybrid battery pack cell. The embodiment includes selecting one of the electrochemical models based on the state of the hybrid battery pack, and deriving an equivalent circuit approximating the behavior of the hybrid battery pack based on the selected electrochemical model. An equivalent circuit can be used to obtain a plot.

2A-2D are exemplary graphs illustrating an optimal current split ratio and a surface plot of a charging period required to fully or partially charge a hybrid battery pack to an optimal current split ratio, according to an embodiment. The surface plot may vary depending on the wattage of the adapter used to charge the hybrid battery pack. Example graphs show surface plots versus adapter wattage at 40 W (FIG. 2A), 50 W (FIG. 2B), 20 W (FIG. 2C) and 30 W (FIG. 2D). A hybrid battery pack includes an energy cell and a power cell. The x-axis indicates the SOC level (indicated by SOC _capacity ) of the energy cell when starting a charging procedure (indicated by SOC ^init ). The y-axis represents the SOC level (indicated by SOC _power ) of the power cell at the start of the charging procedure (indicated by SOC ^init ).

The x-y plane represents various combinations of SOC levels of an energy cell and a power cell at the start of a charging procedure. The combination of the SOC levels of the energy cell and the power cell may be located in the x-y plane by determining a point (x-y plane) where straight lines from different SOC levels of the energy cell and the power cell meet.

The z-axis represents the optimal current split ratio and the time to charge required to charge the hybrid battery pack at the optimal current split ratio. For a particular combination of SOC ^init of an energy cell and a power cell (a point in the xy plane) there is an optimal current split (a point in the z-axis). The z-axis in this example represents the percentage of charging current allocated to the energy cell. For example, it is assumed that the SOC ^init of the energy cell is 0.4 (SOC level 0.4 indicates that the SOC is 40%) and the SOC ^init of the power cell is 0.6.

An embodiment includes determining a point on the x-y plane where a straight line coming from a point representing 0.4 on the x-axis meets a straight line coming from a point representing 0.6 on the y-axis. If a straight line is constructed in the z-direction at the determined point, the point on the z-axis where the straight line contacts the surface is the percentage of the charging current allocated to the energy cell. When the percentage of charging current allocated to the energy cell is determined, the percentage of charging current allocated to the power cell is determined. The percentage of the charging current allocated to the energy cell and the percentage of the charging current allocated to the power cell represent the optimal value of the current split ratio.

The points constituting the surface representing the percentage of charge current assigned to the energy cell can be determined using a graph representing the change in percentage of charge over time ( FIGS. 1A and 1B ). Consider the example graphs shown in FIGS. 1A and 1B . Here, at the start of the charging procedure, the SOC levels of the energy cell and the power cell are 0.

In one embodiment, the optimal charging period during which the hybrid battery pack should be fully or partially charged may be automatically selected or assigned by the user. An embodiment includes locating a point on the x-axis (in the graphs shown in FIGS. 1A and 1B ) that corresponds to an optimal charging time period based on the amount of power in the adapter. Once the points are located, embodiments include comparing changes in percentage of charge corresponding to different percentages of current allocated to the power cells of the hybrid battery pack (shown in the inset of FIGS. 1A and 1B ). The percentage of current allocated to the power cell that can achieve the highest possible charge rate at the optimal charge time (the point located on the x-axis) is determined by the optimal percentage of current that must be allocated to the power cell.

Assume that the optimal percentage of current allocated to the power cell is 40%. As a result, the proportion of current allocated to the energy cell becomes 60%. Therefore, the point representing 60% on the z-axis of FIGS. 2A-2D is one of the points constituting the surface, and the SOC ^init of the energy cell (x-axis) 0 and the SOC ^init of the power cell (y-axis) 0 are combined. corresponds to Similarly, embodiments may determine other points (constituting the surface) corresponding to different combinations of SOC ^init of the power cell (y-axis) and SOC ^init of the energy cell (x-axis).

The points that make up the surface representing the time required to fully or partially charge the hybrid battery pack (represented by the charging time) are automatically selected or can be determined by recording an optimal time set by the user. For a specific combination of the SOC ^init of an energy cell and a power cell (a point in the xy plane), there is time required to fully or partially charge the hybrid battery pack (a point in the z-axis). Considering the SOC ^init of energy cell 0 and the SOC ^init of power cell 0 in this example, one of the points constituting the surface plot is to fully or partially charge the hybrid battery pack if the percentage of current allocated to the energy cell is 60%. corresponding to the time required to

3 is a battery management system (BMS) configured to determine an optimal current split ratio for allocating current to energy cells and power cells of the hybrid battery pack to charge the hybrid battery pack, according to an embodiment; shows A hybrid battery pack may include one or more energy cells and one or more power cells. With a hybrid battery pack, the utility of energy cells and power cells can be used simultaneously. Energy cells have a higher charge capacity and power cells charge/discharge faster. Therefore, the charging process of the hybrid battery pack allocates the charging current to the energy cell and the power cell according to the optimal current split ratio, thereby enabling fast charging (using the power cell) and increasing the operating time of the hybrid battery pack (using the energy cell) can be optimized for

As shown in FIG. 3 , the BMS 300 includes a Power Management Integrated Circuit (PMIC) 301 . In addition, the PMIC 301 includes a processor 302 and a memory 303 . In one embodiment, the BMS 300 may be part of an electric vehicle. In one embodiment, the BMS 300 may be part of a device with a hybrid battery pack. Examples of devices include smart phones, laptops, tablets, wearable devices, cameras, Internet of Things (IoT) devices, trimmers, robots, vacuum cleaners. , a vehicle infotainment system, and the like.

Processor 302 may be configured to determine a fraction of current to be allocated to the energy cell and a fraction of current to be allocated to the power cell to charge the hybrid battery pack. Processor 302 allows a splitter of BMS 300 to distribute charging current to energy cells and power cells. The distribution of the charging current is based on the current split ratio. The current split ratio is the ratio of fractions of the charging current allocated to the energy cell and the power cell. In one embodiment, the charging current assigned to the energy cell is the numerator and the charging current assigned to the power cell is the denominator. For example, assume that the current split ratio is 1.5, the percentage of charging current allocated to the energy cell is 60%, and the percentage of charging current allocated to the power cell is 40%. In another embodiment, the numerator is the charging current assigned to the power cell and the denominator is the charging current assigned to the energy cell. For example, the current split ratio will be 0.67, and the charging current ratio allocated to the energy cell and the charging current ratio allocated to the power cell are 60% and 40%, respectively.

In one embodiment, the processor 302 may determine the wattage of the adapter used to charge the hybrid battery pack and the capacity of the energy cells and power cells. In another embodiment, the processor 302 may obtain input from the user the wattage of the adapter used to charge the hybrid battery pack and the capacity of the energy cells and power cells. The processor 302 may determine the SoC level of the energy cell and the power cell when initiating the charging procedure. In one embodiment, the processor 302 may determine a charging time period during which the hybrid battery pack is fully or partially charged. In one embodiment, the processor 302 may receive as input from the user a charging period during which the hybrid battery pack is fully or partially charged.

If the user does not specify the charging period, the processor 302 may determine the charging period. In one embodiment, the processor 302 may have an artificial intelligence (AI) function. The processor 302 may monitor the usage pattern of the device hosting the BMS 300 and use the usage pattern to determine whether the hybrid battery pack should be fully/partially charged. The decision to fully or partially charge the hybrid battery pack is based on parameters such as the time of day when charging begins, the user's urgency when charging, user activity at different times of the day, and the like. The processor 302 may determine an optimal charging time period during which the hybrid battery pack is fully or partially charged based on the usage pattern and parameters.

It is assumed that the user has not specified a charging period. If the processor 302 expects the user to charge the device when the user's level of urgency is high, the user is busy, or on the go (hosting the BMS 300), the processor 302 can turn on the hybrid battery. You can choose to charge some of the packs. The processor 302 may predict an appropriate charging period that will allow the hybrid battery pack to be charged to a maximum achievable level within the predicted charging period.

Conversely, if the processor 302 determines that the user's level of urgency is low and the user is stationary or idle, the time of day is when the user is not expected to use the device frequently. , the processor 302 may choose to fully charge the hybrid battery pack. The processor 302 may select a specific charging period, wherein the hybrid battery pack is fully charged within the charging period.

The processor 302 determines the wattage of the adapter used to charge the next hybrid battery pack, the capacity of the energy cells and the power cells of the hybrid battery pack, the SoC levels of the energy cells and the power cells at the start of the charging procedure, and the duration of the charging period. An optimal current division ratio may be determined based on at least one.

The memory 303 may store a plot of the change in the charge ratio of the hybrid battery pack versus time for different current split ratios (see FIGS. 1A and 1B ). Each plot corresponds to a specific combination of the SOC levels of the energy cell and the power cell at the beginning of the charging procedure. Each plot corresponds to the wattage of the adapter used to charge the hybrid battery pack and the energy and power cell capacities of the hybrid battery pack.

For example, when the charging procedure starts, the normalized levels of the SOC of the energy cell and the power cell are 0.3 and 0.4, respectively. The wattage of the adapter is 30W and the capacity of the hybrid battery pack (energy cell and power cell combination) is 4Ah. The processor 302 provides a normalized SOC level of 0.3 and 0.4 (the normalized SOC level of the energy cell and the power cell at the beginning of the charging procedure are 0.3 and 0.4, respectively), an adapter wattage of 30W and a capacity of 4Ah (hybrid battery). A plot may be selected showing the change in the charge rate of the hybrid battery pack versus time for different current split rates corresponding to the capacity of the pack. The processor 302 may select one of the current split ratios as the optimal current split ratio from the selected plot, wherein allocating a charging current to the energy cells and the power cells according to the selected current split ratio causes the hybrid battery pack to undergo a determined charging period ( The hybrid battery pack can be charged to the maximum achievable level when being charged (as determined by the processor 302 or received as input from the user).

The processor 302 may learn the charging time and corresponding current split ratio based on what charging current should be allocated to the energy cells and the power cells so that the hybrid battery pack is fully or partially charged within the charging time over a period of time. This may facilitate faster determination of the optimal current split ratio (not using plots of change in charge ratio of hybrid battery pack versus time for different current split ratios).

The processor 302 determines the optimum if there is a change in the wattage of the adapter used to charge the hybrid battery pack, the capacity of the energy cell and the power cell, and at least one of the SoC level of the energy cell and the SoC level of the power cell at the start of the charging procedure. can determine the current split ratio of This is because the plots previously used to determine the current split ratio are no longer viable if at least one variation occurs. If the charging current allocated to the energy cell and the power cell is divided according to an appropriate current division ratio for a specific charging time, the capacity of the hybrid battery pack is likely to increase, enabling fast charging.

3 shows an exemplary unit of the BMS 300, it should be understood that other embodiments are not limited thereto. In other embodiments, the BMS 300 may include fewer or more units. In addition, the label or name of the BMS 300 unit is used for illustrative purposes only and does not limit the scope of the present invention. One or more units may be coupled together to perform the same or substantially similar functions in the BMS 300 .

4 is a use case scenario illustrating the division of a charging current between an energy cell and a power cell of a smart phone, according to an embodiment. BMS 300 is included in the smart phone. The BMS 300 includes a splitter 410 capable of dividing the charging current, and a portion of the charging current is transferred to the power cell 420 and the remaining portion is transferred to the energy cell 430 . The processor 302 of the PMIC 301 of the BMS 300 may configure the splitter 410 to divide the charging current according to an optimal current dividing ratio.

The user can indicate a preferred charging period during which the charging should be completed. Based on the desired duration, embodiments may determine a current split ratio that will maximize the achievable charge level when the hybrid battery pack is charged during the desired charging duration.

5 is a flowchart 500 illustrating a method of charging a hybrid battery pack by allocating a charging current to an energy cell and a power cell of the hybrid battery pack, according to an exemplary embodiment. Here, the charging current is allocated to the divided energy cell and the power cell according to an optimal current division ratio according to an embodiment of the present disclosure. In step 501, the method determines the SoC level (initial SoC) of the energy cells and power cells of the hybrid battery pack at the time of initiation of charging, the wattage of the adapter used to charge the hybrid battery pack, and the energy cells and power cells of the hybrid battery pack determining the dose of

At step 502 , the method includes determining a charging period during which the hybrid battery pack should be charged. In an embodiment, the charging period may be received as an input from the user. The hybrid battery pack can be fully or partially charged within a user-specified charging period. If the user does not specify the charging period, the embodiment includes determining the charging period, ie, the period during which the hybrid battery pack should be charged. The charging period can be determined by the user checking whether the hybrid battery pack will be fully charged or will be charged for a certain amount of time to allow the hybrid battery pack to reach its maximum charge level within the charging period.

To ascertain user intent, embodiments include monitoring usage patterns and using usage patterns to determine whether the user intends to fully charge the hybrid battery pack or has limited time to charge the hybrid battery pack. include Further, embodiments include determining parameters such as charging time, user urgency, user activity, and the like. Embodiments include ascertaining user intent based on a usage pattern and a parameter. Embodiments include determining an optimal charging duration based on user intent. The hybrid battery pack can be fully or partially charged within a charging period.

For example, suppose a user wants to charge a hybrid battery pack during the day. The user is busy and can charge the device for about 10 minutes. When the user does not provide information (charging time: 10 minutes), the embodiment determines the time of day, the user's activity at this time, and the user's activity at this time, in order to predict the charging period, so that the user's intention (hybrid battery pack charging time is limited). An embodiment may predict a charging period, wherein the hybrid battery pack is charged to a maximum achievable level when charged during the charging period.

In another example, assume that the user wants to charge the hybrid battery pack at nighttime or bedtime. Since there is no urgency, the user will not specify a charging period. Accordingly, embodiments include ascertaining the user's intent by determining that the time of day is nighttime or bedtime, where the user's activity and activity is likely to be minimal. The embodiment may confirm that the user intends to fully charge the hybrid battery pack. An embodiment may predict a charging period, wherein the hybrid battery pack is fully charged within the charging period.

At step 503 , the method includes determining an optimal current splitting ratio for splitting a charging current between an energy cell and a power cell of the hybrid battery pack. When the charging current is divided to allocate to the energy cells and the power cells according to the current division ratio, the capacity of the hybrid battery pack can be increased to the maximum possible level when the hybrid battery pack is charged during the charging period. If the charging current is divided according to the current division ratio, fast charging is possible within the charging time. An embodiment may depend on at least one of the wattage of the adapter used to charge the hybrid battery pack, the capacity of the energy cells and the power cells of the hybrid battery pack, the SoC levels of the energy cells and the power cells at the beginning of the charging procedure, and the charging period. and determining a current split ratio based on the.

The processor 302 may distribute the charging current to the energy cell and the power cell, where a portion of the charging current is allocated to the energy cell and a remaining portion of the charging current is allocated to the power cell. For example, if the numerator of the current split ratio is the charging current assigned to the power cell, the denominator is the charging current assigned to the energy cell, and the value of the current split ratio is 0.5, 33.3% of the charging current will be assigned to the power cell and the charging current 66.7% of that is allocated to energy cells. For example, if the numerator of the current split ratio is the charging current assigned to the energy cell and the denominator is the charging current assigned to the power cell, the value of the current split ratio is 2 and the charging current distribution is the same.

An embodiment includes obtaining a plot representing a change in percentage of charge of a hybrid battery pack over time for different current split ratios, wherein the plots are SOC levels of the energy cells and power cells at the beginning of a charging procedure, the hybrid battery pack It is limited by the wattage of the adapter used to charge it, and the capacity of the energy and power cells of the hybrid battery pack. Embodiments include selecting plots corresponding to values of normalized SOC levels of energy cells and power cells, adapter wattage, and capacity of the hybrid battery pack when starting a charging procedure.

An embodiment includes selecting a current split ratio as an optimal current ratio from the selected plot. When the charging current is allocated to the energy cell and the power cell according to the selected current split ratio, the hybrid battery pack can be charged to the maximum achievable level within the determined charging period.

An embodiment includes determining a correlation between a charging duration and a selected current split ratio. An embodiment includes learning a correlation and predicting a selected current split ratio based on determining a charging time duration without relying on a plot.

The various operations of flow chart 500 may be performed in the order presented, in a different order, or concurrently. Also, in some embodiments, some operations listed in FIG. 5 may be omitted.

An embodiment of the present disclosure may be implemented through at least one software program that is executed in at least one hardware device and performs a network management function to control a network element. The network element shown in FIG. 3 includes blocks that may be at least one hardware device or a combination of a hardware device and a software module.

Embodiments of the present disclosure describe a method and system for distributing charging current to energy cells and power cells of a hybrid battery pack such that the hybrid battery pack achieves the highest possible charge level when it is charged during the charging time. Accordingly, the scope of protection extends to such a program in addition to computer readable means comprising a message, and such computer readable storage means when the program is executed on a server, mobile device or suitable programmable device. It is understood to include program code means for implementing one or more steps of a method. The method may be implemented through or with a software program written in, for example, a very high speed integrated circuit Hardware Description Language (VHDL) or any other programming language, or one or more VHDL or several software modules running on one or more hardware devices. is implemented in The hardware device can be any kind of portable device that can be programmed. The device may be, for example, a hardware means (eg an application-specific integrated circuit (ASIC)), a combination of hardware and software (eg an ASIC and a field programmable gate array (FPGA)), or at least one microprocessor. and a combination of at least one memory having a software module therein). The method embodiments described herein may be implemented partly in hardware and partly in software. Alternatively, the present disclosure may be implemented using, for example, other hardware devices, such as a Central Processing Unit (CPU) or Power Management Integrated Circuit (PMIC).

Meanwhile, the system for charging the hybrid battery pack of the present disclosure may be applied to a portable terminal such as a smart phone or a wearable terminal.

6 is a diagram illustrating a configuration of a portable terminal for charging a hybrid battery pack, according to an embodiment.

Referring to FIG. 6 , the portable terminal 600 includes a control unit 610 , an input unit 620 , a storage unit 640 , a hybrid battery pack 650 , a parameter check unit 660 , a charging period determination unit 670 , It may include a current division ratio determiner 680 and a distribution unit 690 .

The input unit 620 receives the user's input of the portable terminal 600 and provides it to the control unit 610 .

The storage unit 640 may be a storage device including a flash memory, a hard disk drive, and the like, and an operating system for controlling the overall operation of the portable terminal 600 , an application program, and data for storage (phone number, SMS message, compression saved image files, videos, etc.). Also, the storage unit 640 stores a plurality of plots. In this case, each of the plurality of plots may represent a change in a percentage of charge of the hybrid battery pack with time for different current split ratios. Further, each of the plurality of plots may include a state of charge level of at least one energy cell at the beginning of charging, a state of charge level of at least one power cell at the beginning of charging, a wattage of an adapter used to charge the hybrid battery pack, and a value of the hybrid battery pack. Constrained by the combination of doses. At this time, the percentage of charging achieves a maximum value within the charging period by allocating a charging current to the at least one energy cell and the at least one power cell according to the selected current split ratio.

The hybrid battery pack 650 includes at least one energy cell 651 and at least one power cell 652 .

The parameter check unit 660 charges the determined state of charge level of the at least one energy cell 651 at the start of charging, the determined state of charge level of the at least one power cell 652 at the start of charging, and the hybrid battery pack 650. Check the wattage of the adapter used and the capacity of the hybrid battery pack 650 .

The charging period determining unit 670 determines the charging period. The charging period determiner 670 may include a pattern checker 671 , an urgency checker 672 , and an activity checker 673 .

The pattern check unit 671 checks the user's usage pattern of the portable terminal 600 .

The urgency check unit 672 determines whether there is an urgency according to the usage pattern at the charging start time.

The activity check unit 673 checks the user activity according to the movement of the portable terminal 600 at the charging start time.

The charging period determining unit 670 determines the charging period based on at least one of a user input designating a charging period and a predicted value of the charging period. At this time, the predicted value of the charging period is to be derived based on at least one of the user's usage pattern of the portable terminal 600, the charging start time, the user's urgency at the charging start time, and the user's activity at the charging start time. can

The current split ratio determining unit 680 selects one plot from among a plurality of plots and determines the current split ratio using the selected plot.

The current split ratio determining unit 680 includes a determined state of charge level of at least one energy cell at the start of charging, a determined state of charge level of at least one power cell at the beginning of charging, a wattage of an adapter used to charge the hybrid battery pack, A corresponding plot is selected from among the plurality of plots based on at least one of a capacity of the hybrid battery pack and the determined charging period, and one of the current split ratios in the selected plot is selected as the determined current split ratio.

The current split ratio determiner 680 may determine a correlation between the charging period and the current split ratio, and predict the current split ratio based on the correlation between the charging period and the current split ratio.

The distribution unit 690 allocates a charging current to the at least one energy cell 651 and the at least one power cell 652 according to the current division ratio determined by the current division ratio determiner 680 to generate the hybrid battery pack 650 . to charge

The controller 610 may control the overall operation of the portable terminal 600 . In addition, the control unit 610 may perform the functions of the parameter checking unit 660 , the charging period determining unit 670 , the current division ratio determining unit 680 , and the distribution unit 690 . The control unit 610 , the parameter check unit 660 , the charging period determination unit 670 , the current division ratio determination unit 680 , and the distribution unit 690 are separately illustrated to describe each function separately. Accordingly, the control unit 610 includes at least one processor configured to perform the respective functions of the parameter check unit 660 , the charging period determination unit 670 , the current division ratio determination unit 680 , and the distribution unit 690 . may include In addition, the control unit 610 is at least one configured to perform some of the functions of the parameter check unit 660 , the charging period determination unit 670 , the current division ratio determination unit 680 , and the distribution unit 690 , respectively. may include a processor of

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may store program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Software may comprise a computer program, code, instructions, or a combination of one or more thereof, which configures a processing device to operate as desired or is independently or collectively processed You can command the device. The software and/or data may be any kind of machine, component, physical device, virtual equipment, computer storage medium or apparatus, to be interpreted by or to provide instructions or data to the processing device. , or may be permanently or temporarily embody in a transmitted signal wave. The software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

As described above, although the embodiments have been described with reference to the limited drawings, those skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques are performed in an order different from the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (20)

a determined state of charge level of at least one energy cell in the hybrid battery pack at the start of charging by a battery management system, the determined state of state level of at least one power cell in the hybrid battery pack at the beginning of charging, charging the hybrid battery pack determining a current split ratio for allocating a charging current to the at least one energy cell and the at least one power cell based on one or more of a wattage of an adapter used to step; and
allocating a charging current to the at least one energy cell and the at least one power cell according to a current split ratio determined by the battery management system to charge the hybrid battery pack;
A method of charging a hybrid battery pack comprising a.
According to claim 1,
The charging period is
User input specifying how long the recharge can be done; and
The predicted value of the charging period derived based on at least one of a usage pattern of a device hosting the battery management system, a charging start time, a user's urgency at the charging start time, and user activity at the charging start time
determined based on at least one of
How to charge a hybrid battery pack.
According to claim 1,
The current division ratio is
is determined based on a plurality of plots,
Each of the plurality of plots,
represents the change in the percentage of charge of the hybrid battery pack with time for different current split ratios,
the state of charge level of the at least one energy cell at the start of charging, the state of charge level of the at least one power cell at the beginning of charging, the wattage of an adapter used to charge the hybrid battery pack and the capacity of the hybrid battery pack limited by the combination of
How to charge a hybrid battery pack.
4. The method of claim 3,
further comprising selecting a plot from among the plurality of plots;
The selected plot is
the determined state of charge level of the at least one energy cell in the hybrid battery pack at the beginning of charging, the determined state of charge level of the at least one power cell in the hybrid battery pack at the beginning of charging, for charging the hybrid battery pack; corresponding to the wattage of the adapter used, and the capacity of the hybrid battery pack.
How to charge a hybrid battery pack.
5. The method of claim 4,
selecting one of the current split ratios in the selected plot as the determined current split ratio;
The percentage of the charge is
allocating a charging current to the at least one energy cell and the at least one power cell according to the selected current split ratio to achieve a maximum value within the charging period
How to charge a hybrid battery pack.
According to claim 1,
determining a correlation between the charging duration and the current split ratio; and
predicting a current split ratio based on a correlation between the charging period and the current split ratio
A method of charging a hybrid battery pack further comprising a.
the determined state of charge level of at least one energy cell in the hybrid battery pack at the beginning of charging, the determined state of charge level of at least one power cell in the hybrid battery pack at the beginning of charging, of an adapter used to charge the hybrid battery pack; determine a current split ratio for allocating a charging current to the at least one energy cell and the at least one power cell based on one or more of a wattage, a capacity of the hybrid battery pack, and a determined charging period, the determined current split ratio A processor configured to charge a hybrid battery pack by allocating a charging current to the at least one energy cell and the at least one power cell according to
A battery management system comprising a.
8. The method of claim 7,
The processor is
the charging time
User input specifying how long the recharge can be done; and
The predicted value of the charging period derived based on at least one of a usage pattern of a device hosting the battery management system, a charging start time, a user's urgency at the charging start time, and user activity at the charging start time
to determine based on at least one of
battery management system.
8. The method of claim 7,
Memory to store multiple plots
further comprising,
The processor is
determining the current split ratio based on the plurality of plots;
Each of the plurality of plots,
represents the change in the percentage of charge of the hybrid battery pack with time for different current split ratios,
the state of charge level of the at least one energy cell at the start of charging, the state of charge level of the at least one power cell at the beginning of charging, the wattage of an adapter used to charge the hybrid battery pack and the capacity of the hybrid battery pack limited by the combination of
battery management system.
10. The method of claim 9,
The processor is
the determined state of charge level of the at least one energy cell in the hybrid battery pack at the beginning of charging, the determined state of charge level of the at least one power cell in the hybrid battery pack at the beginning of charging, of the plurality of plots, the hybrid battery selecting a plot corresponding to the wattage of the adapter used to charge the pack, and the capacity of the hybrid battery pack
battery management system.
11. The method of claim 10,
The processor is
selecting one of the current split ratios in the selected plot as the determined current split ratio;
The percentage of the charge is
allocating a charging current to the at least one energy cell and the at least one power cell according to the selected current split ratio to achieve a maximum value within the charging period
battery management system.
8. The method of claim 7,
The processor is
determining the correlation between the charging period and the current split ratio, and predicting the current split ratio based on the correlation between the charging period and the current split ratio
battery management system.
a hybrid battery pack comprising at least one energy cell and at least one power cell;
a storage unit for storing a plurality of plots;
a current division ratio determining unit that selects one of the plurality of plots and determines a current division ratio using the selected plot; and
A distributor for charging the hybrid battery pack by allocating a charging current to the at least one energy cell and the at least one power cell according to the determined current division ratio
including,
Each of the plurality of plots,
Representing the change in the percentage of charge of a hybrid battery pack with time for different current split ratios
A portable terminal for charging a hybrid battery pack.
14. The method of claim 13,
the determined state of charge level of the at least one energy cell at the start of charging, the determined state of charge level of the at least one power cell at the beginning of charging, the wattage of an adapter used to charge the hybrid battery pack, the capacity of the hybrid battery pack Parameter check unit to check; and
Charging period determining unit to determine the charging period
further comprising,
The current division ratio determining unit,
the determined state of charge level of the at least one energy cell at the start of charging, the determined state of charge level of the at least one power cell at the beginning of charging, the wattage of the adapter used to charge the hybrid battery pack, the determining the current split ratio for allocating a charging current to the at least one energy cell and the at least one power cell based on one or more of a capacity and a determined charging period
A portable terminal for charging a hybrid battery pack.
15. The method of claim 14,
a pattern checking unit for checking a user's usage pattern of the portable terminal;
an urgency checking unit that determines whether there is an urgency according to the usage pattern at the charging start time; and
Activity confirmation unit for confirming user activity according to the movement of the portable terminal at the charging start time
further comprising,
The charging period determining unit,
the above user input specifying the period during which the recharge is possible; and
The predicted value of the charging period derived based on at least one of the usage pattern of the portable terminal, the charging start time, the urgency of the user at the charging start time, and the user activity at the charging start time
determining the charging period based on at least one of
A portable terminal for charging a hybrid battery pack.
15. The method of claim 14,
Each of the plurality of plots,
the state of charge level of the at least one energy cell at the start of charging, the state of charge level of the at least one power cell at the beginning of charging, the wattage of an adapter used to charge the hybrid battery pack and the capacity of the hybrid battery pack limited by the combination of
A portable terminal for charging a hybrid battery pack.
15. The method of claim 14,
The current division ratio determining unit,
the determined SoC level of the at least one energy cell in the hybrid battery pack at the beginning of charging, the determined SoC level of the at least one power cell in the hybrid battery pack at the beginning of charging, from among the plurality of plots, the hybrid battery pack selecting a plot corresponding to the wattage of the adapter used to charge, and the capacity of the hybrid battery pack
A portable terminal for charging a hybrid battery pack.
18. The method of claim 17,
The current division ratio determining unit,
selecting one of the current split ratios in the selected plot as the determined current split ratio;
The percentage of the charge is
allocating a charging current to the at least one energy cell and the at least one power cell according to the selected current split ratio to achieve a maximum value within the charging period
A portable terminal for charging a hybrid battery pack.
15. The method of claim 14,
The current division ratio determining unit,
determining the correlation between the charging period and the current split ratio, and predicting the current split ratio based on the correlation between the charging period and the current split ratio
A portable terminal for charging a hybrid battery pack.
15. The method of claim 14,
The energy cell has a higher capacity density than the power cell and has a lower power density than the power cell.
A portable terminal for charging a hybrid battery pack.

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