Battery systems, power transmission devices, and battery management methods

Abstract

A battery management device according to one embodiment of the present invention includes: a battery management system for monitoring the state of a battery; and a power receiving device for wirelessly receiving power from a power transmitting device, wherein the battery management system is capable of calculating the optimal charging conditions for the battery based on the power transmitting performance of the power transmitting device and data related to the battery state.

Description

Technical Field

[0001] Cross-reference to related applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2019-0113168, filed on September 11, 2019, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0004] This invention relates to a battery management system and method for an integrated wireless charging receiver. Background Technology

[0005] Most batteries used in automobiles are built in the form of cells-modules-packs. Traditionally, these batteries do not selectively charge and discharge; instead, all cells are simultaneously discharged or charged via the positive and negative terminals of the battery pack.

[0006] However, in typical battery cell modules, depending on their location within the battery pack, there are differences in cooling performance and other factors, resulting in functional differences such as varying lifespans between battery modules over time.

[0007] Therefore, it is necessary to monitor the battery status of each module in real time and charge the battery with a charging current appropriate to the status of each battery. Summary of the Invention

[0008] Technical issues

[0009] The purpose of this invention is to provide a battery system that integrates a wireless charging receiver into a battery management system and controls the power transmission conditions of the wireless charging transmitter based on optimal charging conditions calculated according to factors that change according to the battery's charging environment, thereby performing charging to adapt to the battery state of each module.

[0010] Technical solution

[0011] A battery system according to an embodiment of the present invention includes: a battery management system that monitors the state of a battery; and a power receiving device that wirelessly receives power from a power transmitting device, wherein the battery management system calculates the optimal charging conditions for the battery based on data related to the state of the battery and the power transmitting performance of the power transmitting device.

[0012] In the battery system according to an embodiment of the present invention, the battery management system can communicate wirelessly with the power transmission device.

[0013] In a battery system according to an embodiment of the present invention, the battery system can wirelessly receive data related to power transmission conditions from a power transmission device.

[0014] In a battery system according to an embodiment of the present invention, the power transmission performance of the power transmission device may include real-time power transmission efficiency and maximum available transmission power.

[0015] In a battery system according to an embodiment of the present invention, data related to the battery state may include the battery's maximum available charging current, real-time remaining battery capacity, and remaining battery life.

[0016] In the battery system according to an embodiment of the present invention, the battery management system and the power receiving device can be electrically connected.

[0017] In the battery system according to an embodiment of the present invention, the battery management system can measure the input voltage and input current of the battery and the output voltage and output current of the power receiving device in real time.

[0018] In a battery system according to an embodiment of the present invention, the battery management system can calculate the optimal charging conditions based on at least one of the following criteria: wireless charging efficiency, wireless charging speed, and battery life.

[0019] In a battery system according to an embodiment of the present invention, the battery management system can control the power transmission performance of the power transmission device based on optimal charging conditions.

[0020] In a battery system according to an embodiment of the present invention, when the difference between the calculated optimal charging conditions and a preset reference value is greater than or equal to a threshold, the battery management system can adjust the duty cycle and frequency of the power transmission device.

[0021] According to an embodiment of the present invention, a power transmitting device includes: a transmitting circuit that wirelessly transmits power to a power receiving device; a communication unit that wirelessly transmits data related to power transmission conditions to a battery management system and wirelessly receives a power control signal based on optimal charging conditions of the battery calculated by the battery management system; and a controller that adjusts the power transmission conditions transmitted to the power receiving device based on the power control signal according to the optimal charging conditions.

[0022] A battery management method according to an embodiment of the present invention includes: wirelessly transmitting power for supplying power to a battery from a power transmitting device to a power receiving device; monitoring the state of the battery; receiving data related to power transmission conditions from the power transmitting device; and calculating optimal charging conditions for the battery based on the data related to the battery state and the data related to power transmission conditions received from the power transmitting device.

[0023] The battery management method according to embodiments of the present invention may further include adjusting the power transmission conditions of the power transmission device based on the optimal charging conditions of the battery.

[0024] Effects of the present invention

[0025] According to the battery system of the present invention, by integrating the wireless charging receiver into the battery management system and controlling the power transmission conditions of the wireless charging transmitter based on the optimal charging conditions calculated according to factors that change according to the charging environment of the battery, charging can be performed to adapt to the battery state of each module. Attached Figure Description

[0026] Figure 1 This is a block diagram illustrating the configuration of a typical battery management system;

[0027] Figure 2 This is a block diagram illustrating the configuration of a battery system according to an embodiment of the present invention;

[0028] Figure 3 This is a block diagram illustrating the configuration of a power transmission device according to an embodiment of the present invention;

[0029] Figure 4a This is a diagram illustrating the configuration of a battery module according to an embodiment of the present invention;

[0030] Figure 4b This is a diagram illustrating the configuration of a power transmission device according to an embodiment of the present invention;

[0031] Figure 5 A circuit diagram of a battery cell module assembly according to an embodiment of the present invention is shown.

[0032] Figure 6 This is a flowchart illustrating a specific example of a battery management method according to an embodiment of the present invention;

[0033] Figure 7 This is a flowchart illustrating a battery management method according to an embodiment of the present invention; and

[0034] Figure 8 This is a diagram illustrating the hardware configuration of a battery system according to an embodiment of the present invention. Detailed Implementation

[0035] In the following, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. Throughout this document, the same reference numerals are used for the same constituent elements in the drawings, and repeated descriptions of the same constituent elements are omitted.

[0036] The various embodiments of the invention disclosed in this document are illustrated only for the purpose of describing the embodiments of the invention, and the various embodiments of the invention may be embodied in various forms and should not be construed as limited to the embodiments described in this document.

[0037] Expressions such as "first," "second," "first," or "second" used in various embodiments can modify various components regardless of their order and / or importance, and do not limit the corresponding components. For example, a first component may be named a second component without departing from the scope of the invention, and similarly, a second component may be renamed a first component.

[0038] The terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the scope of other implementations. Singular expressions may include plural expressions unless the context clearly indicates otherwise.

[0039] Figure 1 This is a block diagram illustrating the configuration of a typical battery management system.

[0040] Specifically, Figure 1 This is a schematic block diagram illustrating a battery management system according to an embodiment of the present invention, which includes a battery pack 1 and a higher-level controller 2 included in a higher-level system.

[0041] like Figure 1 As shown, the battery pack 1 includes a battery module 10, a switching unit 14, and a battery management system 20. The battery module 10 includes one or more battery cells and is capable of charging and discharging. The switching unit 14 is connected in series to the positive or negative terminal of the battery module 10 to control the flow of charging and discharging current in the battery module 10. The battery management system 20 monitors the voltage, current, temperature, etc. of the battery pack 1 to control and manage the battery module 10, thereby preventing overcharging, over-discharging, etc.

[0042] Here, the switching unit 14 is a semiconductor switching element used to control the charging or discharging current of the battery module 10, and for example, at least one MOSFET can be used.

[0043] Furthermore, the BMS20 can measure or calculate the voltage and current of the gate, source, and drain of the semiconductor switching element to monitor the voltage, current, temperature, etc. of the battery pack 1. The sensor 12, located near the semiconductor switching element, can also be used to measure the current, voltage, temperature, etc. of the battery pack. The BMS20 is an interface that receives values ​​obtained by measuring the various parameters described above, and may include multiple terminals and circuitry connected to these terminals to perform input value processing.

[0044] In addition, BMS20 can control the switching unit 14 (e.g., MOSFET) to turn on / off, and can be connected to battery module 10 to monitor the status of battery module 10.

[0045] The upper-level controller 2 can send control signals for the battery module to the BMS 20. Therefore, the operation of the BMS 20 can be controlled based on signals applied from the main controller. The battery cell of the present invention can be configured to be included in a battery pack used in an energy storage system (ESS) or a vehicle, etc. However, the battery cell of the present invention is not limited to these applications.

[0046] Since the construction of battery pack 1 and BMS20 is known, a more detailed description of them will be omitted.

[0047] Figure 2 This is a block diagram illustrating the configuration of a battery system according to an embodiment of the present invention.

[0048] Reference Figure 2 According to an embodiment of the present invention, the battery system 200 may include a battery management system 210, a power receiving device 220, and a power transmitting device 230. For example... Figure 2 As shown, in the battery system 200 according to an embodiment of the present invention, the battery management system 210 and the power receiving device 220 are connected to each other. Furthermore, the power transmitting device 230 can wirelessly transmit data to and receive data from the battery management system 210, and can wirelessly supply power to the power receiving device 220. This will be described later.

[0049] The battery management system 210 can monitor the state of the battery. Specifically, the battery management system 210 can measure the voltage, current, temperature, and state of charge (SOC) of the battery cells. In addition, the battery management system 210 can detect data related to the battery's state, such as the battery's maximum available charging current, real-time remaining battery capacity, and remaining battery life.

[0050] Furthermore, the battery management system 210 can communicate wirelessly with the power receiving device 220 and the power transmitting device 230. Therefore, the battery management system 210 can wirelessly receive data related to power transmission conditions from the power transmitting device 230.

[0051] The battery management system 210 can measure the input voltage and current of the battery, as well as the output voltage and current of the power receiving device 220, in real time. In this case, the battery management system 210 can wirelessly receive the output voltage and current from the power receiving device 220.

[0052] The battery management system 210 can calculate the optimal charging conditions for the battery based on data related to the battery's measured state and the power transmission performance of the power transmission device 230. In this case, the optimal charging conditions can be calculated based on at least one of wireless charging efficiency, wireless charging speed, and battery life. However, the invention is not limited to this, and various standards can be applied as appropriate.

[0053] The battery management system 210 can control the power transmission performance of the power transmission device 230 based on the calculated optimal charging conditions. For example, the battery management system 210 can control the power transmission device 230 by sending a power control signal to it according to the optimal charging conditions. When the difference between the calculated optimal charging conditions and a preset reference value is greater than or equal to a threshold, the battery management system 210 can adjust the duty cycle and frequency of the power transmission device 230.

[0054] The power receiving device 220 can wirelessly receive power from the power transmitting device 230. In this case, the power receiving device 220 can wirelessly transmit the received power to the battery management system 210.

[0055] Furthermore, the power receiving device 220 can be electrically connected to the battery management system 210. That is, according to the exemplary embodiment of the battery system 200 of the present invention, the power receiving device 220 can be integrated into the battery management system 210 and incorporated together into the battery cell module assembly. For example, the power receiving device 220 can be incorporated into the lower part of the battery management system 210.

[0056] The power transmitting device 230 can communicate wirelessly with the battery management system 210 and the power receiving device 220. In this case, the power transmitting device 230 can send data related to power transmission conditions (e.g., power transmission amount, maximum available transmission power, etc.) to the battery management system 210 and receive power control signals from the battery management system 210.

[0057] Furthermore, the power transmission performance of the power transmission device 230 used to calculate the optimal charging conditions in the battery management system 210 may include real-time power transmission efficiency and maximum available transmission power.

[0058] As described above, the battery system 200 according to an embodiment of the present invention can estimate factors (e.g., connection, resonance quality factor, etc.) that vary according to the charging environment, such as the distance and alignment between coils, the resonant frequency and temperature, by measuring the input and output voltage and current of the battery, the output voltage and current of the power receiving device 220 and the amount of power transmitted by the power transmitting device 230, and select and control the optimal point of wireless charging efficiency, charging speed and battery life.

[0059] Figure 3 This is a block diagram illustrating the configuration of a power transmission device according to an embodiment of the present invention.

[0060] According to an embodiment of the present invention, the power transmission device 300 may include a transmission circuit 310, a communication unit 320, and a controller 330.

[0061] The transmitting circuit 310 can wirelessly transmit power to the power receiving device 220. For example, as described later, the transmitting circuit 310 may include a coil and transmit power in the form of electromagnetic induction or by using resonance according to a resonant frequency.

[0062] The communication unit 320 can wirelessly transmit data about power transmission conditions to the battery management system 210, and wirelessly receive power control signals based on the optimal charging conditions of the battery calculated from the battery management system 210.

[0063] The controller 330 can adjust the power transmission conditions sent to the power receiving device 220 based on the power control signal according to the optimal charging conditions received from the battery management system 210. For example, the controller 330 can adjust the duty cycle, frequency, etc. of the power transmitting device 300.

[0064] As described above, in the battery system according to the present invention, by integrating the wireless charging receiver into the battery management system and controlling the power transmission conditions of the wireless charging transmitter based on the optimal charging conditions calculated according to factors that change according to the battery's charging environment, charging can be performed to suit the battery state of each module.

[0065] Figure 4a This is a diagram illustrating the configuration of a battery module according to an embodiment of the present invention.

[0066] Reference Figure 4a According to an embodiment of the present invention, the battery module 410 may include a coil 420, a battery management system (BMS) 430, and a rectifier (AC / DC) 440.

[0067] The coil is included in the power receiving device and can wirelessly receive power from the power transmitting device. In this case, the coil can receive power in the form of magnetic induction, or receive power by using resonance phenomena according to the resonant frequency.

[0068] A battery management system (BMS) can monitor the status of battery cell module components and control the power delivery device according to optimal charging conditions. Figure 2 The functionality of the battery management system has already been described, so its detailed description will be omitted.

[0069] A rectifier (AC / DC) can rectify the power received from a power transmitting device from alternating current (AC) to direct current (DC).

[0070] Figure 4b This is a diagram illustrating the configuration of a power transmission device according to an embodiment of the present invention.

[0071] Reference Figure 4bAccording to an embodiment of the present invention, the power transmission device may include a coil 450, a controller 460, and a rectifier (AC / DC) 470.

[0072] A coil can wirelessly transmit power to a power receiving device. Similar to a power receiving device, a coil in a power transmitting device can receive power through magnetic induction or by using resonance phenomena based on a resonant frequency.

[0073] The controller can adjust the power transmission conditions from the power transmitting device. For example, the controller can adjust the power transmission amount, duty cycle, frequency, etc., of the power transmitting device, and control the power according to the optimal charging conditions based on the power control signals received from the battery management system (BMS) of the battery module.

[0074] A rectifier (AC / DC) can rectify the power received from a power transmitting device from AC to DC.

[0075] Figure 5 A circuit diagram of a battery cell module according to an embodiment of the present invention is shown.

[0076] refer to Figure 5 According to embodiments of the present invention, a battery cell module may include a resonant coil 502, a rectifier and filter 504, a cell module assembly (CMA) 506, and a battery management system (BMS) 510. Furthermore, the battery management system 510 may include a power supply unit 512, a wireless communication unit 514, a measurement unit 516, and an MCU (microcontroller) unit 518.

[0077] The resonant coil 502 may include an inductor and a capacitor, and may be included in a power receiving device to wirelessly receive power from a power transmitting device. Figure 5 The coil can receive power by using resonance phenomena based on the resonant frequency. However, the present invention is not limited, and the coil can receive power in the form of magnetic induction.

[0078] The rectifier and filter 504 can rectify the output voltage and output current of the power receiving unit and remove noise.

[0079] The battery cell module assembly 506 has a structure that combines multiple battery cells, and the voltage and current input to the battery cell module assembly can be measured by the battery management system 510 to estimate states such as maximum available charging current, real-time remaining capacity, and remaining battery life.

[0080] The battery management system 510 can monitor the battery's voltage, current, temperature, SOC, and other status parameters. Furthermore, the battery management system 510 can calculate the optimal charging conditions for the battery based on data related to the battery's measured status and the power transmission performance of the power transmission device.

[0081] The power supply unit 512 supplies power to the battery management system 510 to perform the functions of the battery management system 510. In addition to supplying power itself, the power supply unit 512 can also wirelessly receive power from a power receiving device integrated in the battery management system 510.

[0082] The wireless communication unit 514 can communicate wirelessly with both the power receiving device and the power transmitting device. For example, the wireless communication unit 514 can receive data related to the output voltage and output current, as well as data related to power transmission conditions (e.g., power transmission amount, maximum available transmission power, etc.) from the power receiving device.

[0083] The measurement unit 516 can measure the state of the battery cells. For example, the measurement unit 516 can be used as a sensor to measure the battery's voltage, current, temperature, SOC, etc. In addition, the measurement unit 516 can detect data related to the battery's state, such as the battery's maximum available charging current, real-time remaining battery capacity, and remaining battery life.

[0084] The MCU unit 518 can calculate the optimal charging conditions for the battery based on data related to the battery state measured by the measurement unit 516 and the power transmission performance of the power transmission device. In this case, the optimal charging conditions can be calculated based on at least one of the following criteria: wireless charging efficiency, wireless charging speed, and battery life.

[0085] Furthermore, the MCU unit 518 can control the power transmission performance of the power transmitting device based on the calculated optimal charging conditions. For example, the MCU unit 518 can control the power transmitting device by sending a power control signal to the power transmitting device according to the optimal charging conditions via the wireless communication unit 514. In this case, when the difference between the calculated optimal charging conditions and a preset reference value is greater than or equal to a threshold, the MCU unit 518 can send a signal to adjust the duty cycle and frequency of the power transmitting device.

[0086] Figure 6 This is a flowchart illustrating a specific example of a battery management method according to an embodiment of the present invention.

[0087] Reference Figure 6 First, when battery charging begins, the power transmitting unit (PTU) and the power receiving unit (PRU) align (S602). Then, it is checked whether wireless communication between the power transmitting unit and the power receiving unit is performed correctly (S604).

[0088] When it is detected that the wireless communication between the power transmitting unit and the power receiving unit is not being performed normally, the process returns to operation S602, and the power transmitting unit and the power receiving unit are re-aligned. When it is detected that the wireless communication between the power transmitting unit and the power receiving unit is being performed normally in operation S604, the output voltage and output current of the power receiving unit are measured (S606). In this case, the output voltage and output current of the power receiving unit can be measured by the battery management system.

[0089] Then, the input voltage, input current, and temperature of the battery cell are measured (S608). In this case, the input voltage, input current, and temperature of the battery cell can be measured by the battery management system. In operation S610, the power transmission conditions of the power transmission unit are received ( Figure 6 (Power transmission volume). In this case, the power transmission conditions of the power transmission unit can be wirelessly transmitted from the power transmission unit to the battery management system.

[0090] In operation S612, the maximum available charging current A, real-time remaining capacity B, and remaining battery life C of the battery are calculated. In this case, each parameter value can be calculated based on data about the battery state measured by the battery management system.

[0091] Furthermore, based on the power transmission conditions received from the power transmission unit, the real-time power transmission efficiency D and the maximum available transmission power E can be calculated. In this case, the output voltage and output current measured by the power receiving unit can be used.

[0092] In operation S616, the optimal charging point O is calculated based on at least one of the following criteria calculated in operations S612 and S614: maximum available current A, real-time remaining capacity B, remaining battery life C, real-time power transmission efficiency D, and maximum available transmission power E. Here, the optimal charging point O can vary based on at least one of the following criteria: wireless charging efficiency, wireless charging speed, and battery life.

[0093] In addition, such as Figure 6 As shown, the optimal charging point O can be calculated as X1*A + X2*B + X3*C + X4*D + X5*E. In this case, X1 to X5 are the weights applied to the variables respectively, and can be set by the user according to the environment affecting battery state and power delivery performance.

[0094] In operation S618, the optimal point cost function e is calculated as the difference between the calculated optimal charging point O and the ideal O, which serves as a reference value. In this case, the ideal O can be a theoretical value calculated based on the battery's charging environment, but is not limited to this, and can also be an experimental value calculated experimentally based on the environment.

[0095] When the optimal point cost function e is less than the control threshold (yes) in operation S620, the optimal charging point (0) calculated in real time is close to the reference value, and the power transmission conditions (e.g., duty cycle and frequency) of the power transmission unit remain in the current state.

[0096] On the other hand, when the optimal point cost function e is greater than or equal to the control threshold (NO) in operation S620, the power transmission conditions of the power transmission unit (e.g., duty cycle and frequency) are changed, and then the process returns to operations S606 to S610 and the measurement is performed.

[0097] As described above, the battery management method according to embodiments of the present invention can estimate factors (e.g., connection, resonance quality factor, etc.) that change according to the charging environment, such as the distance and alignment between coils, resonant frequency and temperature, by measuring the input and output voltage and current of the battery, the output voltage and current of the power receiving unit and the amount of power transmitted by the power transmitting unit, and can select and control the optimal point of wireless charging efficiency, charging speed and battery life.

[0098] Figure 7 This is a flowchart illustrating a battery management method according to an embodiment of the present invention.

[0099] Reference Figure 7 First, power for supplying the battery is wirelessly transmitted from the power transmitting device to the power receiving device (S710). The battery management system (BMS) monitors the battery status (S720).

[0100] In this configuration, the battery management system can measure the battery cell's voltage, current, temperature, and state of charge (SOC). Furthermore, as data regarding battery status, it can detect the battery's maximum available charging current, real-time remaining battery capacity, and remaining battery life.

[0101] Furthermore, during S720 operation, the battery management system can measure the battery's input voltage and current, as well as the output voltage and current of the power receiving device, in real time. In this case, the output voltage and current can be wirelessly received from the power receiving device.

[0102] Next, in operation S730, the battery management system can receive data about power transmission conditions from the power transmission device. For example, power transmission conditions may include power transmission quantity, real-time transmission efficiency, and maximum available transmission power.

[0103] Then, the optimal charging conditions for the battery are calculated based on the data about the battery state measured in operation S720 and the data about the power transmission conditions received from the power transmission device in operation S730. In this case, the optimal charging conditions can be calculated based on at least one of the following criteria: wireless charging efficiency, wireless charging speed, and battery life. However, the invention is not limited to this, and various criteria can be applied as appropriate.

[0104] Furthermore, despite Figure 7 Although not shown in the diagram, the battery management method according to an embodiment of the present invention may further include adjusting the power transmission conditions of the power transmission device based on the optimal charging conditions of the battery calculated in operation S740. In this case, when the difference between the calculated optimal charging conditions and a preset reference value is greater than or equal to a threshold, the duty cycle and frequency of the power transmission device may be adjusted.

[0105] As described above, according to the battery management method of the present invention, by integrating the wireless charging receiver into the battery management system and controlling the power transmission conditions of the wireless charging transmitter based on the optimal charging conditions calculated according to factors that change according to the battery's charging environment, charging can be performed to suit the battery state of each module.

[0106] Figure 8 This is a diagram illustrating the hardware configuration of a battery system according to an embodiment of the present invention.

[0107] like Figure 8 As shown, the battery system 800 may include: a microcontroller (MCU) 810 that controls various processes and each configuration; a memory 820 that stores operating system programs and various programs (e.g., battery pack anomaly diagnostic programs or battery pack temperature estimation programs); an input / output interface 830 that provides input and output interfaces between battery cell modules and / or switching units (e.g., semiconductor switching devices); and a communication interface 840 that enables communication with external entities (e.g., a higher-level controller) via wired or wireless communication networks. Thus, the computer program according to the invention can be stored in the memory 820 and processed by the microcontroller 810, thereby enabling it to be implemented, for example, to execute... Figure 2 and 3 The modules of each functional block shown.

[0108] In the above description, the invention is not limited to these embodiments only because all the constituent elements constituting the embodiments of the invention are described as operating in combination or in combination. That is, all the constituent elements can be selectively combined and operated in one or more forms, provided that they are within the scope of the purpose of the invention.

[0109] Furthermore, terms such as “comprising,” “configured,” or “having” as described above mean that the corresponding constituent elements may be included unless otherwise described, and therefore these terms should be interpreted as capable of further including, rather than excluding, other constituent elements. Unless otherwise stated, all terms used herein (including technical or scientific terms) may have the same meaning as commonly understood by one of ordinary skill in the art. Commonly used terms, such as those defined in dictionaries, should be interpreted as consistent with the meaning in the context of the relevant art and should not be interpreted as having an ideal or overly formal meaning unless explicitly defined herein.

[0110] The above description is merely an illustration of the technical concept of the present invention, and those skilled in the art will be able to make various modifications and variations without departing from the essential features of the invention. Therefore, the embodiments disclosed in this invention are not intended to limit the technical concept of the invention, but rather to explain it, and the scope of the technical concept of the invention is not limited by these embodiments. The scope of protection of this invention should be interpreted by the claims set forth below, and all technical concepts within their equivalent scope should be interpreted as being included within the scope of this invention.

Claims

1. A battery system comprising: a battery management system that monitors a state of a battery; and a power receiving device that wirelessly receives power from a power transmitting device; wherein the battery management system calculates an optimal charging condition of the battery based on at least one of a maximum available charging current, a real-time remaining battery capacity, a remaining battery life, a real-time power transmission efficiency, and a maximum available transmission power of the battery and a corresponding weight, wherein the power receiving device is integrated in the battery management system, wherein the battery management system adjusts a duty cycle and a frequency of the power transmitting device when a difference between the calculated optimal charging condition and a preset reference value is greater than or equal to a threshold value. 2.The battery system of claim 1, wherein the battery management system wirelessly communicates with the power transmitting device. 3.The battery system of claim 2, wherein, the battery management system wirelessly receives data related to a power transmission condition from the power transmitting device. 4.The battery system of claim 1, wherein the battery management system and the power receiving device are electrically coupled. 5.The battery system of claim 1, wherein the battery management system measures an input voltage and an input current of the battery and an output voltage and an output current of the power receiving device in real time. 6.The battery system of claim 1, wherein the battery management system calculates the optimal charging condition according to at least one criterion of a wireless charging efficiency, a wireless charging speed, and a battery life. 7.The battery system of claim 1, wherein the battery management system controls a power transmission performance of the power transmitting device based on the optimal charging condition. 8.A power transmitting device comprising: a transmitting circuit that wirelessly transmits power to a power receiving device; a communication unit that wirelessly transmits data related to a power transmission condition to a battery management system and wirelessly receives a power control signal according to an optimal charging condition of a battery calculated by the battery management system; and a controller that adjusts a power transmission condition to the power receiving device based on the power control signal according to the optimal charging condition, wherein the power receiving device is integrated in the battery management system, wherein the battery management system adjusts a duty cycle and a frequency of the power transmitting device when a difference between the calculated optimal charging condition and a preset reference value is greater than or equal to a threshold value, wherein the battery management system calculates an optimal charging condition of the battery based on at least one of a maximum available charging current, a real-time remaining battery capacity, a remaining battery life, a real-time power transmission efficiency, and a maximum available transmission power of the battery and a corresponding weight. 9.A battery management method comprising the steps of: wirelessly transmitting power for supplying a battery from a power transmitting device to a power receiving device; monitoring a state of the battery; receiving data related to a power transmission condition from the power transmitting device; and ​ calculating an optimal charging condition of the battery based on at least one of a maximum available charging current, a real-time residual battery capacity, a residual battery life, a real-time power transmission efficiency and a maximum available transmission power of the battery and a corresponding weight, wherein the power receiving device is integrated in a battery management system, wherein the battery management system adjusts a duty cycle and a frequency of the power transmitting device when a difference between the calculated optimal charging condition and a preset reference value is greater than or equal to a threshold value.

10. The battery management method of claim 9, further comprising the step of: adjusting the power transmission condition of the power transmitting device based on the optimal charging condition of the battery.

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