Battery equalization control method, battery equalization control device, and storage medium

Abstract

The present disclosure relates to a battery equalization control method, a battery equalization control device and a storage medium. The battery includes at least two battery cells. The battery equalization control method includes: obtaining an open circuit voltage of each battery cell in the at least two battery cells, and determining a power difference between the battery cells based on the obtained open circuit voltage; determining an equalization power based on a voltage of a battery cell with the highest power among the battery cells; and performing battery equalization control according to the power difference and the equalization power. The present disclosure performs battery equalization control according to the power difference and the equalization power, thereby solving the equalization problems of over equalization and under equalization caused by fixed equalization time.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, and in particular to a battery equalization control method, a battery equalization control device and a storage medium. BACKGROUND

[0002] As the energy source of computers, communications and consumer electronics (referred to as 3C electronic products), 3C electronic products have high requirements for the power of batteries. Batteries are combined by multiple cells to meet the requirements of 3C electronic products for power. However, due to the individual differences between the cell monomers in the battery and the initial imbalance of the cell monomers, the cell monomers in the battery may have differences in state of charge (SOC), self-discharge rate, internal resistance and capacity. The differences between the cells of the battery affect the performance of the battery during use, reduce the user experience, and also affect the service life of the battery. Therefore, the imbalance caused by the differences between the cell monomers needs to be solved by an equalization strategy of the cell monomers.

[0003] The equalization strategy in the related art is prone to over-equalization and under-equalization. SUMMARY

[0004] To overcome the problems in the related art, the present disclosure provides a battery equalization control method, a battery equalization control device and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a battery equalization control method is provided, the battery including at least two cells, and the battery equalization control method includes:

[0006] obtaining the open-circuit voltage of each cell in the at least two cells, and determining the power difference between the cells based on the obtained open-circuit voltage; determining the equalization power based on the voltage of the cell with the highest power in the cells; and performing battery equalization control according to the power difference and the equalization power.

[0007] In an implementation, determining the equalization power based on the voltage of the cell with the highest power in the cells includes:

[0008] obtaining the voltage of the cell with the highest power in the cells and the resistance of the cell with the highest power at a set time interval; determining the current of the cell with the highest power according to the voltage of the cell with the highest power and the resistance of the cell with the highest power; and integrating the current of the cell with the highest power to obtain the equalization power.

[0009] In an implementation, the performing battery equalization control according to the power difference and the equalization power includes:

[0010] If an absolute value of a difference between the charge difference and the equalization charge is greater than a threshold value, performing battery equalization control on the highest charge cell, and at intervals of the set time interval, determining an equalization charge again based on a voltage of the highest charge cell among the cells, and performing battery equalization control according to the charge difference and the equalization charge.

[0011] In an embodiment, the performing battery equalization control according to the charge difference and the equalization charge comprises:

[0012] If an absolute value of a difference between the charge difference and the equalization charge is less than a threshold value, ending the equalization control on the battery.

[0013] In an embodiment, the determining the charge difference among the cells based on the obtained open circuit voltage comprises:

[0014] determining a discharge depth of each cell based on the obtained open circuit voltage of each cell;

[0015] determining a discharge depth difference among the cells based on the discharge depth of each cell;

[0016] determining the charge difference among the cells based on the discharge depth difference and a maximum tolerable charge of the highest charge cell among the cells.

[0017] According to a second aspect of the embodiments of the present disclosure, a battery equalization control device is provided, the battery including at least two cells, and the battery equalization control device comprising:

[0018] a determination module configured to obtain an open circuit voltage of each cell among the at least two cells, and determine a charge difference among the cells based on the obtained open circuit voltage, and determine an equalization charge based on a voltage of a highest charge cell among the cells;

[0019] a control module configured to perform battery equalization control according to the charge difference and the equalization charge.

[0020] In an embodiment, the determination module is configured to:

[0021] obtain a voltage of a highest charge cell among the cells and a resistance of the highest charge cell at intervals of a set time interval, determine a current of the highest charge cell according to the voltage of the highest charge cell and the resistance of the highest charge cell, and integrate the current of the highest charge cell to obtain an equalization charge.

[0022] In an embodiment, the control module is configured to:

[0023] If an absolute value of a difference between the power difference and the equalization power is greater than a threshold value, performing battery equalization control on the highest power cell, and at intervals of the set time interval, determining an equalization power again based on a voltage of the highest power cell among the cells, and performing battery equalization control according to the power difference and the equalization power.

[0024] In an embodiment, the control module is configured to:

[0025] If an absolute value of a difference between the power difference and the equalization power is less than a threshold value, ending the equalization control on the battery.

[0026] In an embodiment, the determination module is configured to:

[0027] determining a discharge depth of each of the cells based on the obtained open circuit voltage of each of the cells, determining a discharge depth difference between the cells based on the discharge depth of each of the cells, and determining the power difference between the cells based on the discharge depth difference and a maximum tolerable power of the highest power cell among the cells.

[0028] According to a third aspect of the embodiments of the present disclosure, a battery equalization control apparatus is provided, comprising:

[0029] a processor, and a memory for storing processor-executable instructions, wherein the processor is configured to execute the battery equalization control method in the first aspect or any of the embodiments of the first aspect.

[0030] According to a fourth aspect of the embodiments of the present disclosure, a non-transitory computer readable storage medium is provided, when instructions in the storage medium are executed by a processor of a mobile terminal, the mobile terminal is enabled to execute the battery equalization control method in the first aspect or any of the embodiments of the first aspect.

[0031] The technical solution provided by the embodiments of the present disclosure can have the following beneficial effects: obtaining open circuit voltages of each of the at least two cells, and determining a power difference between the cells based on the obtained open circuit voltages, determining an equalization power according to a voltage of a highest power cell among the cells, and performing battery equalization control according to the power difference and the equalization power, which can realize dynamic equalization control, thereby solving the problems of over-equalization and under-equalization, and improving user experience.

[0032] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure.

[0034] Figure 1 is a schematic diagram of a passive equalization circuit of a fuel gauge according to an example embodiment.

[0035] Figure 2 is a schematic diagram of a passive equalization circuit according to an example embodiment.

[0036] Figure 3 is a flowchart of an equalization control strategy in the related art according to an example embodiment.

[0037] Figure 4 is a flowchart of a battery equalization method according to an example embodiment.

[0038] Figure 5 is a flowchart of a battery equalization method according to an example embodiment.

[0039] Figure 6 is a flowchart of a battery equalization method according to an example embodiment.

[0040] Figure 7 is a flowchart of a battery equalization method according to an example embodiment.

[0041] Figure 8 is a flowchart of a battery equalization method according to an example embodiment.

[0042] Figure 9 is a flowchart of a battery equalization method according to an example embodiment.

[0043] Figure 10 is a block diagram of a battery equalization apparatus according to an example embodiment.

[0044] Figure 11 is a block diagram of an apparatus according to an example embodiment. DETAILED DESCRIPTION

[0045] The example embodiments will be described in detail herein with reference to the accompanying drawings. The following description is presented in the context of the accompanying drawings in which the same numbers represent the same or similar elements throughout the several figures. The implementations described in the following example embodiments are not meant to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0046] Batteries can provide power for 3C electronic products such as computers, smart terminals and electric vehicles, and are indispensable devices in 3C electronic products, which can directly determine the endurance of 3C electronic products, so 3C electronic products have high requirements on battery performance. The battery cell is the basic unit in the battery, and multiple battery cells form a battery module. In order to ensure the capacity of the battery in the 3C electronic product, a multi-string and multi-parallel structure is usually used to form multiple battery modules. In each battery module, multiple battery cells need to be balanced.

[0047] Similarly, as the energy source of 3C electronic products, 3C electronic products have high power requirements for the battery capacity. Taking a mobile phone as an example, a multi-cell series connection is used to achieve high power. Among them, lithium-ion batteries are widely used in electric vehicles and 3C electronic products due to their improvements in energy density, cycle life and durability, but due to high coulomb efficiency, lithium-ion batteries cannot achieve "self-balancing" like other types of batteries, such as lead-acid batteries. For batteries that cannot achieve "self-balancing", due to individual differences between battery cells and initial imbalance of battery cells, there may be differences in state of charge (SOC), self-discharge rate, internal resistance and capacity between battery cells in the battery. If not properly managed, the imbalance of batteries that cannot achieve "self-balancing" will not correct itself over time. The differences between the battery cells will affect the performance of the battery during use, reduce the user experience, and also affect the service life of the battery.

[0048] The balancing circuit in the related art includes passive balancing and active balancing. The passive balancing circuit, also known as parallel resistance balancing, has a parallel resistor connected across the two terminals of the high-energy cell to achieve balancing between cells by energy consumption. Unlike passive balancing, active balancing uses peripheral circuits to transfer energy from high-energy cells to low-energy cells to achieve balancing between cells. In the two balancing methods of passive balancing and active balancing, the passive balancing circuit has simple structure, low circuit cost and high reliability, and is the most commonly used balancing method in engineering, but it has the defects of energy loss and heat generation during energy consumption; active balancing has high energy utilization rate, fast balancing speed and high balancing efficiency, but it requires a more complex peripheral circuit and has poor reliability.

[0049] In order to achieve the balancing effect between the battery cells, not only the balancing circuit for realizing the balancing between the battery cells is needed, but also the balancing strategy is needed to control the balancing circuit to realize the specific balancing function, so as to solve the imbalance caused by the difference between the battery cells. Since the internal resistance and the electric quantity of the battery cell are difficult to control in the use process, the state of charge (SOC) or the open circuit voltage (OCV) of the battery cell is usually selected as the balancing index, and the balancing function is realized in combination with the balancing start condition and the termination condition.

[0050] In the related art, the electric quantity in the electric quantity meter is measured to realize the balancing of the battery cell, but the balancing strategy in the related art is prone to cause the problems of over-balancing and under-balancing. Taking the balancing control of two strings of battery cells in the mobile terminal of the mobile phone in the related art as an example, the reasons for causing the over-balancing and under-balancing of the balancing strategy in the related art are analyzed. Figure 1 is a schematic diagram of a passive balancing circuit of an electric quantity meter according to an example embodiment. As shown in Figure 1 , the electric quantity meter includes a VSS pin, an SRN pin, an SRP pin, a TS1 pin, an SCL pin, an SDA pin, a VC1 pin, a VC2 pin, a PBI pin, a CHG pin, a PACK pin, a DSG pin, and a PWPD pin. Figure 1 The electric quantity meter in adopts a passive balancing circuit of parallel resistors. Figure 2 is a principle schematic diagram of a passive balancing circuit according to an example embodiment. As shown in Figure 2 , a field effect transistor (FET) is integrated inside an integrated circuit chip (IC chip), and the FET is connected to a first resistor R1 and a second resistor R2 in parallel. Figure 2 In , FET1 and FET2 are connected in parallel, the external circuit includes two strings of battery cells and a first balancing resistor Rext1 and a second balancing resistor Rext2 connected to the two strings of battery cells respectively, and the VC1, VC2, and VSS (power ground) of the PIN of the IC chip are connected to the external circuit. Through the hardware cooperation of the internal circuit and the external circuit and the balancing control strategy, the electric quantity balancing of the first battery cell Cell1 and the second battery cell Cell2 can be realized. In an implementation manner, two parallel metal-oxide-semiconductor field-effect transistors (MOSFETs) are integrated inside the integrated circuit chip (IC chip).

[0051] Figure 3 is a flowchart of a balancing control strategy in the related art according to an example embodiment. As shown inFigure 3 As shown, the balancing control strategy in the related art includes the following steps.

[0052] In step S011, the IC chip acquires the open circuit voltage OCV of the two battery cells, and determines the discharge depth difference based on the acquired open circuit voltage OCV of the two battery cells.

[0053] In this step, the discharge depth (Depth of discharge, DOD) corresponding to the two battery cells is determined based on the acquired open circuit voltage OCV of the two battery cells, and the discharge depth difference ΔDOD is determined based on the discharge depth DOD corresponding to the two battery cells.

[0054] The step of determining the discharge depth DOD based on the open circuit voltage OCV includes determining the discharge depth DOD by querying the OCV-DOD table constructed by the battery cell modeling when the microcontroller unit (Microcontroller Unit, MCU) knows the open circuit voltage OCV. The data in the OCV-DOD table is stored in the register of the IC chip, and the microcontroller unit MCU reads the data in the OCV-DOD table as needed.

[0055] In step S012, the charge difference ΔQ of the two battery cells is determined based on the maximum tolerable charge Qmax of the known battery cell.

[0056] The charge difference of the two battery cells is determined as follows:

[0057] ΔQ = ΔDOD * Qmax

[0058] In the formula, ΔQ represents the charge difference, ΔDOD represents the discharge depth difference, and Qmax represents the maximum tolerable charge.

[0059] In step S013, the total balancing time is determined based on the balancing time required for the charge difference per milliampere-hour (milliampere-hour, mAh) configured by the IC chip.

[0060] The total balancing time is determined as follows:

[0061] T = ΔQ * Bal Time / mAh Cell

[0062] In the formula, ΔQ represents the charge difference, and Bal Time / mAh Cell represents the balancing time required for the charge difference per milliampere-hour (milliampere-hour, mAh).

[0063] In step S014, the MOSFET corresponding to the hardware drive is controlled according to the total balancing time, and the battery cell with high charge in the two battery cells is discharged in parallel.

[0064] In the related art, the battery with higher power is determined from two battery cells, if the first battery cell has higher power, the MOSFET corresponding to the first battery cell is driven by the first driver object Drive1 to parallelly discharge the first battery cell to achieve power balance between the first battery cell and the second battery cell. If the second battery cell has higher power, the MOSFET corresponding to the second battery cell is driven by the second driver object Drive2 to parallelly discharge the second battery cell to achieve power balance between the first battery cell and the second battery cell.

[0065] In the above balance control strategy, the balance time required for the mAh power difference is set according to the average voltage (for example, 3.8V) of the battery cell, and the balance time is fixed during the balance process. In the actual balance circuit, the voltage of the battery cell is changing all the time (for example, 4.45V), and the balance time needs to be dynamically adjusted according to the change of the voltage. However, in the related art, the balance time required for the mAh power difference is fixed, that is, the on time of the MOSFET is fixed and cannot be dynamically adjusted, while the power difference AQ calculated according to the open circuit voltage OCV is accurate, so it is easy to cause over-balance and under-balance problems of the two battery cells.

[0066] The two battery cells in the high-power mobile phone are balanced by the balance control strategy in the related art, but the use effect of the two battery cells is poor, and as the battery cells age, the capacity of the battery cells decreases obviously, the use time of the components is shortened, and the user experience is poor.

[0067] The present disclosure aims at the defects in the related art and discloses a battery balance control method, wherein the battery includes at least two battery cells, and the battery balance control method includes: obtaining the open circuit voltage of each battery cell in the at least two battery cells, and determining the power difference between the battery cells based on the obtained open circuit voltage; determining the balance power based on the voltage of the battery cell with the highest power in each battery cell; and performing battery balance control according to the power difference and the balance power. By performing battery balance control according to the power difference and the balance power, the on time of the MOSFET can be dynamically adjusted to achieve accurate balance of the battery.

[0068] Figure 4 is a flowchart of a battery balance control method according to an exemplary embodiment. As shown in Figure 4 , the battery includes at least two battery cells, and the battery balance control method includes the following steps.

[0069] In step S11, the open circuit voltage of each battery cell in the at least two battery cells is obtained, and the power difference between the battery cells is determined based on the obtained open circuit voltage.

[0070] In step S12, the balance power is determined based on the voltage of the battery cell with the highest power in each battery cell.

[0071] In step S13 , battery balancing control is performed according to the power difference and the balanced power.

[0072] The battery balancing control method provided in the embodiments of the present disclosure is applicable to batteries with at least two cells. Such batteries can be used in, but are not limited to, mobile phone batteries, laptop batteries, and electric vehicle batteries. Furthermore, the battery balancing control method is not limited to the battery structure. For example, a battery with two cells can be connected in series end-to-end or side-by-side in parallel.

[0073] Figure 5 FIG. 1 is a flow chart showing a battery balancing control method according to an exemplary embodiment. Figure 5 As shown, determining the balanced power based on the voltage of the battery cell with the highest power among the battery cells includes the following steps.

[0074] In step S21 , the voltage of the cell with the highest charge among the cells and the resistance of the cell with the highest charge among the cells are obtained at set time intervals.

[0075] In the embodiment of the present disclosure, the time interval ΔT may be set according to the MCU power consumption and / or balancing effect. For example, the time interval ΔT may be set to 0.5s, 1s, etc., thereby increasing the flexibility of the battery balancing control.

[0076] In the embodiment of the present disclosure, the resistance includes the on-resistance R of the cell itself. CB And the balancing resistor Rext configured in the passive balancing circuit. Figure 2 As an example, the passive equalization circuit shown in Figure 2 In the example, the balancing resistor configured for the first cell is the first balancing resistor Rext1, and the balancing resistor configured for the second cell includes the first balancing resistor Rext1 and the second balancing resistor Rext2. CB Equal, the register corresponding to the first cell is configured as: Rext1+R CB , configure the register corresponding to the second cell as: Rext1+Rext2+R CB .

[0077] In step S22 , the current of the battery cell with the highest charge is determined according to the voltage of the battery cell with the highest charge and the resistance of the battery cell with the highest charge.

[0078] In the embodiment of the present disclosure, the current of the cell with the highest charge is determined by the following formula:

[0079] I CB =Voltage() / (Rext+R CB )

[0080] Where: I CBI (t) = ∫I (t) dt CB R (t) = Rext+R CB R (t) = Rext+R

[0081] In step S23, the current of the highest charge cell is integrated to obtain the equalization charge.

[0082] In the embodiment of the present disclosure, the equalization charge is determined according to the following formula:

[0083] Q int =∫I CB ΔT

[0084] In the formula, Q int represents the equalization charge, I CB represents the current of the highest charge cell, and ΔT represents the time interval.

[0085] Figure 6 is a flow chart of a battery equalization control method according to an example embodiment. As shown in Figure 6 , the battery equalization control is performed according to the charge difference and the equalization charge, including the following steps.

[0086] In step S31, if the absolute value of the difference between the charge difference and the equalization charge is greater than a threshold value, the battery equalization control is performed on the highest charge cell.

[0087] In step S32, a time interval is set, and the equalization charge is determined again based on the voltage of the highest charge cell among the cells.

[0088] In step S33, the battery equalization control is performed according to the charge difference and the equalization charge.

[0089] Figure 7 is a flow chart of a battery equalization control method according to an example embodiment. As shown in Figure 7 , the battery equalization control is performed according to the charge difference and the equalization charge, including the following steps.

[0090] In step S41, the absolute value of the difference between the charge difference and the equalization charge is determined.

[0091] In step S42, if the absolute value of the difference between the charge difference and the equalization charge is less than a threshold value, the equalization control of the battery is ended.

[0092] Figure 8 is a flow chart of a battery equalization control method according to an example embodiment. As shown in Figure 8As shown, based on the obtained open circuit voltage, the difference in the electric quantity between the battery cells is determined, including the following steps.

[0093] In step S51, based on the obtained open circuit voltage of each battery cell, the discharge depth of each battery cell is determined;

[0094] In step S52, based on the discharge depth of each battery cell, the difference in the discharge depth between the battery cells is determined;

[0095] In step S53, based on the difference in the discharge depth and the maximum tolerable electric quantity of the battery cell with the highest electric quantity among the battery cells, the difference in the electric quantity between the battery cells is determined.

[0096] In an embodiment, taking a battery including two battery cells as an example, the battery equalization control method provided by the embodiment is used to perform equalization control on the two battery cells in the battery, the parallel discharge current is calculated according to the obtained battery cell voltage and the passive equalization circuit, the equalization electric quantity is obtained by integrating the discharge current, the equalization electric quantity and the difference in the electric quantity of the two battery cells are compared, and it is dynamically judged whether the equalization termination condition is reached. When the equalization termination condition is reached, the MOSFET is turned off to stop equalization. Not only the accurate electric quantity equalization can be realized, but also the dynamic adjustment of the equalization time can be realized. Figure 9 is a flow chart of a battery equalization method according to an example embodiment. As shown in Figure 9 , the battery equalization method includes the following steps.

[0097] In step S61, the open circuit voltage OCV of the two battery cells is obtained respectively, and the difference in the discharge depth ΔDOD between the two battery cells is determined according to the obtained open circuit voltage of the two battery cells.

[0098] In step S62, the difference in the electric quantity ΔQ between the battery cells is determined according to the maximum tolerable electric quantity of the battery cell with the highest electric quantity among the two battery cells.

[0099] In step S63, the voltage of the battery cell with the highest electric quantity among the two battery cells is obtained at a set time interval ΔT to determine the equalization current.

[0100] In step S64, the equalization electric quantity Q int is determined by integrating the equalization current.

[0101] In step S65, the relationship between the absolute value of the difference between the difference in the electric quantity ΔQ and the equalization electric quantity Q int and the threshold value ε is judged.

[0102] In step S66, when |ΔQ-Q int |<ε, the MOSFET corresponding to the battery cell with the highest electric quantity among the two battery cells is turned off, and the equalization control of the battery is completed. When |ΔQ-Q int |>ε, the MOSFET corresponding to the battery cell with the highest electric quantity among the two battery cells is driven to perform shunt equalization, and the step S63 is returned.

[0103] In the embodiments of the present disclosure, by judging the relationship between the power difference AQ and the equalization power Q within a set time interval, the dynamic adjustment of the equalization time is realized, and then the time of the equalization cutoff is predicted, the accurate equalization control is realized, and the problems of over-equalization and under-equalization are avoided. int

[0104] Based on the same concept, the embodiments of the present disclosure also provide a battery equalization control device.

[0105] It can be understood that the battery equalization control device provided by the embodiments of the present disclosure comprises a hardware structure and / or a software module corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of each example disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of the embodiments of the present disclosure.

[0106] Figure 10 is a block diagram of a battery equalization control device according to an exemplary embodiment. Referring to Figure 10 , the battery equalization control device 100 comprises a determination module 101 and a control module 102.

[0107] The determination module 101 is configured to obtain the open circuit voltage of each battery cell in the at least two battery cells, and determine the power difference between the battery cells based on the obtained open circuit voltage, and determine the equalization power based on the voltage of the battery cell with the highest power in each battery cell.

[0108] The control module 102 is configured to perform battery equalization control according to the power difference and the equalization power.

[0109] In the embodiments of the present disclosure, the determination module is configured to:

[0110] obtain the voltage of the battery cell with the highest power and the resistance of the battery cell with the highest power in each battery cell at a set time interval, determine the current of the battery cell with the highest power according to the voltage of the battery cell with the highest power and the resistance of the battery cell with the highest power, and integrate the current of the battery cell with the highest power to obtain the equalization power.

[0111] In the embodiments of the present disclosure, the control module is configured to:

[0112] ​If the absolute value of the difference between the power difference and the equalization power is greater than the threshold value, battery equalization control is performed on the highest power cell, and the equalization power is determined again based on the voltage of the highest power cell in each cell at intervals of the set time interval, and battery equalization control is performed according to the power difference and the equalization power.

[0113] In the embodiments of the present disclosure, the control module is configured to:

[0114] If the absolute value of the difference between the power difference and the equalization power is less than the threshold value, the equalization control of the battery is ended.

[0115] In the embodiments of the present disclosure, the determination module is configured to:

[0116] The discharge depth of each cell is determined based on the open circuit voltage of each cell, and then the discharge depth difference between the cells is determined based on the discharge depth of each cell, and finally the power difference between the cells is determined based on the discharge depth difference and the maximum tolerable power of the highest power cell in each cell.

[0117] As to the apparatus in the above-mentioned embodiments, the specific manners in which various modules perform operations have been described in details in the embodiments of the method, and thus will not be described in details here.

[0118] Figure 11 is a block diagram of an apparatus 200 for prompt tone page presentation according to an exemplary embodiment. The apparatus 200 can be a mobile phone, computer, digital broadcast terminal, message transmitting device, game console, tablet device, medical device, fitness device, personal digital assistant, etc.

[0119] Referring to Figure 11 , the apparatus 200 can include one or more of the following components: a processing component 202, a memory 204, a power supply component 206, a multimedia component 208, an audio component 210, an input / output (I / O) interface 212, a sensor component 214, and a communication component 216.

[0120] The processing component 202 generally controls the overall operations of the apparatus 200, such as operations associated with display, phone call, data communication, camera operation and recording operation. The processing component 202 can include one or more processors 220 to execute instructions to complete all or part of steps of the methods described above. Further, the processing component 202 can include one or more modules to facilitate the interaction between the processing component 202 and other components. For example, the processing component 202 can include a multimedia module to facilitate the interaction between the multimedia component 208 and the processing component 202.

[0121] The memory 204 is configured to store various types of data to support the operation of the device 200. Examples of such data include instructions for any application or method operating on the device 200, contact data, phonebook data, messages, pictures, videos, and the like. The memory 204 can be implemented by any type of volatile or nonvolatile storage devices or a combination thereof such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0122] The power component 206 provides power to the various components of the device 200. The power component 206 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 200.

[0123] The multimedia component 208 includes a screen providing an output interface between the device 200 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, swiping, and gestures on the touch panel. The touch sensors can not only sense a boundary of a touching or swiping action, but also detect duration and pressure related to the touching or swiping action. In some embodiments, the multimedia component 208 includes a front camera and / or a rear camera. The front and / or rear camera can receive external multimedia data when the device 200 is in an operation mode, such as a shooting mode or a video mode. Each of the front and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0124] The audio component 210 is configured to output and / or input audio signals. For example, the audio component 210 includes a microphone (MIC) that is configured to receive external audio signals when the device 200 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 204 or transmitted via the communication component 216. In some embodiments, the audio component 210 also includes a speaker for outputting audio signals.

[0125] The I / O interface 212 provides an interface between the processing component 202 and peripheral interface modules, which can be a keyboard, a click wheel, buttons, and the like. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0126] The sensor component 214 includes one or more sensors to provide status assessments for various aspects of the device 200. For example, the sensor component 214 can detect an open / closed status of the device 200, relative positioning of components, such as a display and keypad of the device 200, a change in position of the device 200 or a component of the device 200, presence or absence of user contact with the device 200, orientation or acceleration / deceleration of the device 200, and temperature changes of the device 200. The sensor component 214 can include proximity sensor(s) configured to detect presence of nearby objects without any physical contact. The sensor component 214 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 214 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0127] The communication component 216 is configured to facilitate wired or wireless communication between the device 200 and another device. The device 200 can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 216 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 216 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technology.

[0128] In an exemplary embodiment, the device 200 can be implemented using one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic elements, for performing the above-described methods.

[0129] In an exemplary embodiment, a non-transitory computer-readable storage medium, such as the memory 204 including instructions, is also provided, which can be executed by the processor 220 of the device 200 to perform the above-described methods. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disc, and an optical data storage device, etc.

[0130] It can be understood that, in the present disclosure, "multiple" refers to two or more, and other quantifiers are similar. The association relationship of "and / or" describing the associated objects means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it. The singular forms "a", "said" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0131] It can be further understood that the terms "first", "second" and the like are used to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a particular order or importance. In fact, the expressions "first", "second" and the like can be completely interchangeable. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present disclosure.

[0132] It can be further understood that, unless otherwise specified, "connection" includes direct connection between the two without other components, and also includes indirect connection between the two with other elements.

[0133] It can be further understood that, although the operations in the embodiments of the present disclosure are described in a specific order in the accompanying drawings, it should not be understood as requiring the operations to be performed in the specific order or in a serial order, or requiring all the shown operations to be performed to obtain the desired results. In a specific environment, multitasking and parallel processing can be advantageous.

[0134] Other embodiments of the present disclosure will be apparent to those skilled in the art upon consideration of the specification and practice of the inventive concepts disclosed herein. The present application is intended to cover any and all variations of the present disclosure which come within the scope of the general concepts of the present disclosure and include common general knowledge or custom of the art not specifically admitted in the present disclosure. The specification and examples are to be considered exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0135] It should be understood that the present disclosure is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery balancing control method, characterized in that: The battery includes at least two battery cells, and the battery balancing control method includes: Obtaining an open circuit voltage of each of the at least two battery cells, and determining a charge difference between the battery cells based on the obtained open circuit voltage; Determining a balanced charge based on the voltage of the battery cell with the highest charge among the battery cells; performing battery balancing control according to the power difference and the balanced power; The method of determining the balanced power based on the voltage of the cell with the highest power among the cells includes: obtaining the voltage of the cell with the highest power among the cells and the resistance of the cell with the highest power at set time intervals, wherein the resistance includes the on-resistance of the cell itself and the balancing resistance configured in the passive balancing circuit; determining the current of the cell with the highest power according to the voltage of the cell with the highest power and the resistance of the cell with the highest power; and integrating the current of the cell with the highest power to obtain the balanced power; The performing battery balancing control according to the power difference and the balanced power includes: Comparing the balanced power and the power difference, dynamically determining whether a balancing termination condition is met, and stopping battery balancing control when the balancing termination condition is met; wherein, if the absolute value of the difference between the power difference and the balanced power is greater than a threshold, performing battery balancing control on the battery cell with the highest power, and re-determining the balanced power based on the voltage of the battery cell with the highest power among the battery cells at a set time interval, and performing battery balancing control based on the power difference and the balanced power; and, if the absolute value of the difference between the power difference and the balanced power is less than a threshold, terminating the balancing control of the battery.

2. The battery balancing control method according to claim 1, wherein: The determining the power difference between the battery cells based on the acquired open circuit voltage includes: Determining a depth of discharge of each battery cell based on the obtained open circuit voltage of each battery cell; Determining a depth of discharge difference between the battery cells based on the depth of discharge of the battery cells; The charge difference between the battery cells is determined based on the discharge depth difference and the maximum tolerable charge of the battery cell with the highest charge among the battery cells.

3. A battery balancing control device, characterized in that: The battery includes at least two battery cells, and the battery balancing control device includes: A determination module, configured to obtain an open-circuit voltage of each of the at least two battery cells, determine a charge difference between the battery cells based on the obtained open-circuit voltage, and determine a balanced charge based on the voltage of the battery cell with the highest charge among the battery cells; wherein, at set time intervals, the voltage of the battery cell with the highest charge among the battery cells and the resistance of the battery cell with the highest charge are obtained, the resistance including the on-resistance of the battery cell itself and the balancing resistance configured in the passive balancing circuit; the current of the battery cell with the highest charge is determined based on the voltage of the battery cell with the highest charge and the resistance of the battery cell with the highest charge, and the current of the battery cell with the highest charge is integrated to obtain the balanced charge; A control module is configured to perform battery balancing control based on the power difference and the balanced power, wherein the battery balancing control based on the power difference and the balanced power includes: comparing the balanced power with the power difference, dynamically determining whether a balancing termination condition is met, and stopping battery balancing control when the balancing termination condition is met; wherein, If the absolute value of the difference between the power difference and the balanced power is greater than a threshold, battery balancing control is performed on the battery cell with the highest power, and at a set time interval, the balanced power is re-determined based on the voltage of the battery cell with the highest power among the battery cells, and battery balancing control is performed based on the power difference and the balanced power; and if the absolute value of the difference between the power difference and the balanced power is less than a threshold, balancing control of the battery is terminated.

4. The battery balancing control device according to claim 3, wherein: The determining module is configured to: Determining a depth of discharge of each battery cell based on the obtained open circuit voltage of each battery cell; Determining a depth of discharge difference between the battery cells based on the depth of discharge of the battery cells; The charge difference between the battery cells is determined based on the discharge depth difference and the maximum tolerable charge of the battery cell with the highest charge among the battery cells.

5. A battery balancing control device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to execute the battery balancing control method according to any one of claims 1 to 2.

6. A non-transitory computer-readable storage medium, wherein when instructions in the storage medium are executed by a processor of a mobile terminal, the mobile terminal is enabled to execute the battery balancing control method according to any one of claims 1 to 2.

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