Battery diagnostic device and operation method thereof

Abstract

A battery diagnostic device according to one embodiment disclosed in this document may include an acquisition unit that acquires a balancing execution time of a battery unit, a calculation unit that calculates at least one balancing execution ratio based on the balancing execution time, and a diagnosis unit that compares a specified balancing execution ratio corresponding to a specified period with a reference ratio and diagnoses an abnormality in the battery unit.

Description

[Technical Field]

[0001] The present invention claims the benefit of priority based on Korean Patent Application No. 10-2022-0183673, filed December 23, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference. SUMMARY OF THE INVENTION The embodiments disclosed herein relate to a battery diagnostic device and a method of operation thereof. [Background technology]

[0002] In recent years, research and development into secondary batteries has been actively pursued. Here, secondary batteries are batteries that can be charged and discharged, and include both conventional Ni / Cd batteries, Ni / MH batteries, and more recent lithium-ion batteries. Among secondary batteries, lithium-ion batteries have the advantage of having a much higher energy density than conventional Ni / Cd batteries, Ni / MH batteries, and other batteries. Furthermore, because lithium-ion batteries can be manufactured to be compact and lightweight, they are used as power sources for mobile devices. In recent years, their range of use has expanded to include power sources for electric vehicles, and they are attracting attention as a next-generation energy storage medium.

[0003] Furthermore, the secondary battery can generally be used as a battery pack including a battery module in which a plurality of battery cells are connected in series and / or parallel, and can also be used as a battery rack including a plurality of battery modules and a rack frame for accommodating such battery modules.

[0004] Meanwhile, multiple battery units (e.g., battery cells, battery modules, battery packs, or battery racks) connected in series or parallel to each other may experience imbalances in the state of charge over time due to differences in capacity, etc. This can lead to problems such as overcharging or over-discharging of only a specific battery unit, reducing the capacity of the entire battery unit and shortening its lifespan.

[0005] To prevent this problem, it is important to balance the state of charge (SOC) of the battery units evenly. For example, if the SOC deviation between battery units is above a certain level, balancing can be performed using a balancing current. Summary of the Invention [Problem to be solved by the invention]

[0006] However, the balancing function artificially reduces the SOC deviation between battery units, which has the side effect of making it difficult to quickly diagnose abnormalities in the battery units. This has led to the problem that abnormal battery units, such as internal short circuits or other types of failures, are not quickly diagnosed due to the balancing function.

[0007] In the embodiments disclosed herein, a battery diagnostic device and an operating method thereof can be provided that can diagnose abnormalities in battery units by utilizing the characteristic that an abnormal battery unit will have a SOC deviation from other normal battery units and will have a high balancing execution ratio.

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

[0009] A battery diagnostic device according to one embodiment disclosed in this document may include an acquisition unit that acquires a balancing execution time of a battery unit, a calculation unit that calculates at least one balancing execution ratio based on the balancing execution time, and a diagnosis unit that compares a specified balancing execution ratio corresponding to a specified period with a reference ratio and diagnoses an abnormality in the battery unit.

[0010] In one embodiment of the battery diagnostic device disclosed in this document, the calculation unit can calculate the specified balancing execution ratio based on a value obtained by dividing the balancing execution time of the battery unit during the specified period by the specified period.

[0011] The battery diagnostic device according to an embodiment disclosed herein may further include a determination unit that determines the reference ratio based on another balancing execution ratio corresponding to another period before the specified period.

[0012] The battery diagnostic device according to an embodiment disclosed herein may further include a determination unit that determines the reference ratio based on other balancing execution ratios of other battery units of the same model as the battery unit.

[0013] In one embodiment of the battery diagnostic device disclosed in this document, the diagnostic unit can diagnose the battery unit as an abnormal battery unit if the difference between the specified balancing execution ratio and the reference ratio is equal to or greater than a specified value.

[0014] The battery diagnostic device according to one embodiment disclosed in this document may further include an abnormality processing unit that performs an abnormality processing function based on the abnormality diagnosis result of the battery unit, and the abnormality processing function may include a notification function and / or a short-circuit function.

[0015] In one embodiment of the battery diagnostic device disclosed in this document, the abnormality processing unit performs the notification function for the abnormality diagnosis result and / or information related to the battery unit, and the information related to the battery unit may include manufacturing information of the battery unit and / or location information where the battery unit is located.

[0016] In one embodiment of the battery diagnostic device disclosed in this document, the battery unit is a battery cell, a battery module, a battery pack, or a battery rack.

[0017] A battery diagnosis method according to one embodiment disclosed in this document may include an operation of acquiring a balancing execution time of a battery unit, an operation of calculating at least one balancing execution ratio based on the balancing execution time, and an operation of comparing a specified balancing execution ratio corresponding to a specified period with a reference ratio to diagnose an abnormality in the battery unit.

[0018] In one embodiment of the battery diagnostic method disclosed in this document, the operation of calculating at least one balancing execution ratio may include an operation of calculating the specified balancing execution ratio based on a value obtained by dividing the balancing execution time of the battery unit during the specified period by the specified period.

[0019] The battery diagnosis method according to an embodiment disclosed herein may further include determining the reference ratio based on another balancing execution ratio corresponding to another period before the specified period.

[0020] The battery diagnosis method according to an embodiment disclosed herein may further include determining the reference ratio based on other balancing execution ratios of other battery units of the same model as the battery unit.

[0021] In one embodiment of the battery diagnosis method disclosed herein, the operation of diagnosing an abnormality in the battery unit may include an operation of diagnosing the battery unit as an abnormal battery unit if the difference between the specified balancing execution ratio and the reference ratio is equal to or greater than a specified value.

[0022] The battery diagnosis method according to one embodiment disclosed herein may further include an operation of performing an abnormality processing function based on the abnormality diagnosis result of the battery unit, and the abnormality processing function may include a notification function and / or a short circuit function.

[0023] In one embodiment of the battery diagnosis method disclosed herein, the operation of performing the abnormality processing function may include an operation of performing the notification function for the abnormality diagnosis result and / or information related to the battery unit, and the information related to the battery unit may include manufacturing information of the battery unit and / or location information where the battery unit is located. [Effects of the Invention]

[0024] The battery diagnostic device and its operating method according to various embodiments disclosed herein can detect the occurrence of short circuits or other types of faults within a battery.

[0025] The effects of the battery abnormality diagnosis device and its operating method disclosed in this document are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the disclosure of this document. In addition, this document can provide various other benefits that can be perceived directly or indirectly. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a block diagram of a battery diagnostic device according to an embodiment; [Figure 2] 10A and 10B are diagrams illustrating an example in which the balancing execution ratio of an abnormal battery unit increases according to a change in the cycle, according to an embodiment. [Figure 3] 10A and 10B are diagrams illustrating an example in which the balancing execution ratio of an abnormal battery unit increases according to a change in the cycle, according to an embodiment. [Figure 4] 4 is an operation flowchart of the battery diagnostic device according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0027] Various embodiments of the present invention will now be described with reference to the accompanying drawings, although it should be understood that this is not intended to limit the invention to the particular embodiments, but rather to include various modifications, equivalents, and / or alternatives to the embodiments of the present invention.

[0028] The various embodiments and terms used in this document are not intended to limit the technical features described in this document to a specific embodiment, but should be understood to include various modifications, equivalents, or alternatives of the embodiment. In connection with the description of the drawings, like reference numerals may be used for like or related components. The singular form of a noun corresponding to an item may include one or more of the said item unless the relevant context clearly dictates otherwise.

[0029] In this document, each phrase such as "A or B," "at least one of A and B," "at least one of A or B," "A, B, or C," "at least one of A, B, and C," and "at least one of A, B, or C" may include any one or all possible combinations of the items listed with that phrase. Terms such as "first," "second," "first," "second," "A," "B," "(a)," or "(b)" may be used simply to distinguish that element from other elements and do not limit that element in other respects (e.g., importance or order) unless specifically stated to the contrary.

[0030] In this document, when a (e.g., first) component is referred to as being "coupled," "coupled," or "connected" to another (e.g., second) component, with or without the terms "functionally" or "communicatively," or when a reference is made to "coupled" or "connected," this means that the component may be coupled to the other component directly (e.g., by wire), wirelessly, or through a third component.

[0031] According to one embodiment, the method according to various embodiments disclosed herein may be provided in a computer program product. The computer program product may be traded between a seller and a buyer as a commodity. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a compact disc read only memory (CD-ROM)) or distributed online (e.g., downloaded or uploaded) via an application store or directly between two user devices. In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily generated on a machine-readable storage medium such as the memory of a manufacturer's server, an application store server, or an intermediary server.

[0032] According to various embodiments, each of the aforementioned components (e.g., modules or programs) may include one or more entities, and some of the entities may be located separately in other components. According to various embodiments, one or more of the aforementioned components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the respective components of the multiple components before the integration. According to various embodiments, operations performed by modules, programs, or other components may be performed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be performed in a different order, omitted, or one or more other operations may be added.

[0033] FIG. 1 is a block diagram of a battery diagnostic device according to an embodiment. Referring to FIG. 1, a battery diagnostic device 101 can be connected to an electronic device 103 and / or an external device 105 via wire and / or wireless.

[0034] In one embodiment, the connection (104) between the battery diagnostic device 101 and the electronic device 103 may be a communication connection via a wired and / or wireless network. In one embodiment, the wired network may be based on a local area network (LAN) communication or a power line communication. In one embodiment, the wireless network may be based on a local area network (e.g., Bluetooth, WiFi (wireless fidelity), or IrDA (infrared data association)) or a wide area network (e.g., a cellular network, a 4G network, a 5G network).

[0035] In another embodiment, the connection (104) between the battery diagnostic device 101 and the electronic device 103 may be a connection via an inter-device communication method (e.g., a bus, a general purpose input and output (GPIO), a serial peripheral interface (SPI), or a mobile industry processor interface (MIPI)).

[0036] According to one embodiment, the connection (106) between the battery diagnostic device 101 and the external device 105 may be a communication connection via a wired and / or wireless network.

[0037] In one embodiment, the electronic device 103 may be a mobile device (e.g., a mobile phone, a laptop computer, a smartphone, a smart pad), an electric vehicle (e.g., an electric vehicle (EV), a hybrid EV (HEV), a plug-in HEV (PHEV), or a fuel cell EV (FCEV)), an energy storage system (ESS), or a battery swapping system (BSS).

[0038] According to one embodiment, the electronic device 103 may include one or more battery units 111, 113, 115. Each of the one or more battery units 111, 113, 115 may be a battery cell, a battery module, a battery pack, or a battery rack.

[0039] According to one embodiment, the external device 105 may be a user terminal or an external server, where the user terminal may be a mobile device (e.g., a mobile phone, a laptop computer, a smartphone, a smart pad) or a personal computer (PC).

[0040] According to one embodiment, the battery diagnostic device 101 may include a communication circuit 120, a sensor 130, a memory 140, and a processor 150. According to an embodiment, the battery diagnostic device 101 shown in Fig. 1 may further include at least one component (e.g., a display, an input device, or an output device) other than the components shown in Fig. 1.

[0041] According to one embodiment, the communication circuit 120 can establish a wired communication channel and / or a wireless communication channel between the battery diagnostic device 101 and the electronic device 103 and / or the external device 105, and can transmit and receive data to and from the electronic device 103 and / or the external device 105 via the established communication channel.

[0042] In one embodiment, the sensor 130 may obtain a value related to the status of the battery units 111, 113, 115 of the electronic device 103. In one embodiment, the value related to the status may indicate one or more values ​​for the voltage, current, resistance, state of charge (SOC), state of health (SOH), temperature, or a combination thereof, of the battery units 111, 113, 115. Hereinafter, the value related to the status may be referred to as a "status value."

[0043] According to one embodiment, memory 140 may include volatile and / or non-volatile memory. In one embodiment, the memory 140 may store data used by at least one component (e.g., the processor 150) of the battery diagnostic device 101. For example, the data may include software (or associated instructions), input data, or output data. In one embodiment, the instructions, when executed by the processor 150, may cause the battery diagnostic device 101 to perform the operation defined by the instructions.

[0044] In one embodiment, memory 140 may include one or more software components (eg, an acquisition component 141, a calculation component 143, a determination component 145, a diagnosis component 147, and an anomaly processing component 149).

[0045] In one embodiment, processor 150 may include a central processing unit, an application processor, a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor.

[0046] According to one embodiment, the processor 150 can execute software (e.g., the acquisition unit 141, the calculation unit 143, the determination unit 145, the diagnosis unit 147, and the abnormality processing unit 149), control at least one other component (e.g., a hardware or software component) of the battery diagnosis device 101 coupled to the processor 150, and perform various data processing or calculations.

[0047] Hereinafter, a method for the battery diagnostic device 101 to diagnose an abnormality in the battery unit (111, 113, or 115) via the acquisition unit 141, calculation unit 143, decision unit 145, diagnosis unit 147, and / or abnormality processing unit 149 will be described.

[0048] According to an embodiment, the acquiring unit 141 may acquire the balancing execution time of the battery unit (111, 113, or 115). According to an embodiment, the acquiring unit 141 may acquire the balancing execution time of the battery unit (111, 113, or 115) from the electronic device 103 connected via a wired and / or wireless network. Here, the balancing execution time may refer to the time taken to balance the SOC (state of charge) of the battery units 111, 113, and 115 to an even state. Such balancing may be performed independently within the electronic device 103. Furthermore, the balancing execution time may refer to the time taken for the battery unit (111, 113, or 115) to perform balancing from a first time point to a second time point.

[0049] According to one embodiment, the acquisition unit 141 may acquire the balancing execution time and / or balancing execution ratio of another battery unit of the same model as the battery unit (111, 113, or 115). According to one embodiment, the acquisition unit 141 may acquire the balancing execution time and / or balancing execution ratio of the other battery unit from an external device 105 (e.g., an external server) connected via a wired and / or wireless network. Here, the other battery unit may refer to a battery unit of the same model as the battery unit (111, 113, or 115) that is installed in another electronic device rather than the electronic device 103.

[0050] According to one embodiment, the calculation unit 143 may calculate at least one balancing execution ratio based on the balancing execution time of the battery unit (111, 113, or 115) acquired via the acquisition unit 141. For example, the calculation unit 143 may calculate a balancing execution ratio for each of a plurality of periods included in the period from the first time point to the second time point of the battery unit (111, 113, or 115).

[0051] According to one embodiment, the calculation unit 143 may calculate a specified balancing execution ratio based on the balancing execution time during a specified period among the acquired balancing execution times and the specified period. In one embodiment, the calculation unit 143 may calculate the specified balancing execution ratio based on a value obtained by dividing the balancing execution time during a specified period by the specified period.

[0052] According to one embodiment, the calculation unit 143 may calculate the other balancing execution ratio based on the acquired balancing execution times during another period prior to the specified period and the other period. In one embodiment, the calculation unit 143 may calculate the other balancing execution ratio based on a value obtained by dividing the other balancing execution time during the other period by the other period. Here, the other period may have the same or different duration as the specified period.

[0053] For convenience of explanation, the following description will be given assuming that the acquisition unit 141 acquires the balancing execution time of the battery unit (111, 113, or 115) from a first time point to a second time point. The other period from a third time point after the first time point to a fourth time point before the second time point may be referred to as a first period, and the specified period from the fourth time point to the second time point may be referred to as a second period. Furthermore, the balancing execution time during the first period (or the second period) may be referred to as a first balancing execution time (or a second balancing execution time), and the other balancing execution ratio (or a specified balancing execution ratio) may be referred to as a first balancing execution ratio (or a second balancing execution ratio). However, this is merely an example, and the specified period and other periods may be set in various ways.

[0054] For example, the calculation unit 143 can calculate a first balancing execution ratio (e.g., 1%) by multiplying the value obtained by dividing the first balancing execution time (e.g., 7.2 hours) during a first cycle (e.g., 720 hours) by the first cycle by 100. Furthermore, the calculation unit 143 can calculate a second balancing execution ratio (e.g., 5%) by multiplying the value obtained by dividing the second balancing execution time (e.g., 36 hours) during a second cycle (e.g., 720 hours) by the second cycle by 100.

[0055] According to an embodiment, the calculation unit 143 may calculate another balancing execution ratio based on the balancing execution time of the other battery unit acquired via the acquisition unit 141.

[0056] According to an embodiment, the determination unit 145 may determine the reference ratio. According to an embodiment, the determination unit 145 may determine the reference ratio based on other balancing execution ratios. For example, the determination unit 145 may determine the other balancing execution ratio as the reference ratio. As another example, the determination unit 145 may determine the average balancing execution ratio of multiple other balancing execution ratios acquired by the acquisition unit 141 and / or calculated by the calculation unit 143 as the reference ratio.

[0057] According to one embodiment, the other balancing execution ratio may refer to another balancing execution ratio corresponding to another period before the specified period among the balancing execution ratios of at least one of the battery units (111, 113, or 115) calculated by the calculation unit 143. In this case, the calculation unit 143 may determine the reference ratio based on the first balancing execution ratio corresponding to the first period before the second period.

[0058] According to another embodiment, the other balancing execution ratio may refer to another balancing execution ratio of another battery unit acquired by the acquisition unit 141 or calculated by the calculation unit 143 .

[0059] According to one embodiment, the diagnosis unit 147 can diagnose abnormalities in the battery unit (111, 113, or 115). According to one embodiment, the diagnosing unit 147 can compare a designated balancing execution ratio corresponding to a designated period, among the balancing execution ratios of at least one of the battery units (111, 113, or 115) calculated by the calculating unit 143, with a reference ratio, and diagnose an abnormality in the battery unit (111, 113, or 115). Here, the reference ratio may be a ratio pre-stored in the memory 140 or a ratio calculated by the determining unit 145.

[0060] According to one embodiment, the diagnosis unit 147 may diagnose the battery unit (111, 113, or 115) as an abnormal battery unit if the difference between the designated balancing execution ratio and the reference ratio is equal to or greater than a designated value. Alternatively, the diagnosis unit 147 may diagnose the battery unit (111, 113, or 115) as a normal battery unit if the difference is less than a designated value. Here, the designated value may be set variously depending on the specifications of the battery unit (111, 113, or 115).

[0061] For example, if the specified value is set to 3% and the reference ratio is determined by the determination unit 145 to be the first balancing execution ratio (e.g., 1%), the diagnosis unit 147 can diagnose the battery unit (111, 113, or 115) as an abnormal battery unit because the difference between the second balancing execution ratio (e.g., 5%) and the first balancing execution ratio is greater than or equal to the specified value of 4%.

[0062] In the case of an abnormal battery unit in which a short circuit or failure has occurred internally, the electronic device including the abnormal battery unit can increase the balancing execution rate by itself. The battery diagnostic device 101 can reduce the risk of damage to the electronic device 103 by quickly diagnosing whether or not there is an abnormality in the battery unit (111, 113, or 115) whose balancing execution rate has increased compared to the previous cycle using the above characteristics.

[0063] According to one embodiment, the abnormality processing unit 149 can perform an abnormality processing function based on the abnormality diagnosis result of the battery unit (111, 113, or 115). In one embodiment, the abnormality processing function can include a notification function or a short circuit function.

[0064] According to one embodiment, the abnormality processing unit 149 may perform the notification function for the abnormality diagnosis result of the battery unit (111, 113, or 115) and / or information related to the battery unit (111, 113, or 115). For example, the information related to the battery unit (111, 113, or 115) may include manufacturing information of the battery unit (111, 113, or 115) and / or location information of the battery unit (111, 113, or 115). Here, the location information of the battery unit (111, 113, or 115) may include information related to the location of the battery unit (111, 113, or 115) within the electronic device 103, more specifically, information related to the connection relationship between the battery units 111, 113, and 115.

[0065] According to one embodiment, the abnormality processing unit 149 can transmit abnormality diagnosis results of the battery unit (111, 113, or 115) and / or information regarding the battery unit (111, 113, or 115) to an external device 105 connected via a wired and / or wireless network.

[0066] According to one embodiment, the abnormality processing unit 149 can isolate the abnormal battery unit (111, 113, or 115) from the electronic device 103 based on the abnormality diagnosis result of the battery unit (111, 113, or 115). Here, the isolation can include electrical and / or mechanical isolation.

[0067] 2 is a diagram illustrating an example in which the balancing execution ratio of an abnormal battery unit increases in accordance with a change in the cycle according to an embodiment of the present invention. FIG. 2 will be explained using the configuration of FIG.

[0068] 2, there are shown graphs 210 and 220, which illustrate balancing execution ratios calculated based on the time spent balancing a plurality of battery units during a first cycle and a second cycle, respectively. The balancing execution ratios may be calculated by the calculation unit 143.

[0069] In graphs 210 and 220, it can be seen that the balancing execution ratio of battery unit 5 among the plurality of battery units increases from 1% to 5% as the cycle progresses from the first to the second cycle. In contrast, it can be seen that the balancing execution ratios of the remaining battery units, excluding battery unit 5, do not change despite the change in cycle.

[0070] In this case, the diagnosis unit 147 can diagnose the fifth battery unit as an abnormal battery unit because the difference between the balancing execution ratio (1%) of the first cycle determined as the reference ratio by the determination unit 145 and the balancing execution ratio (5%) of the second cycle is equal to or greater than a specified value (e.g., 3%). Also, the diagnosis unit 147 can diagnose the remaining battery units whose balancing execution ratios have not changed as normal battery units.

[0071] 3 is a diagram illustrating an example in which the balancing execution ratio of an abnormal battery unit increases in accordance with a change in the cycle according to an embodiment of the present invention. FIG. 3 will be explained using the configuration of FIG.

[0072] 3, there are shown graphs 310 and 320, which show the balancing execution ratios calculated based on the time spent balancing a plurality of battery units during a first cycle and a second cycle, respectively. The balancing execution ratios may be calculated by the calculation unit 143.

[0073] In graphs 310 and 320, it can be seen that the balancing execution ratio of battery units 1 to 4 and battery units 6 to 10 among the multiple battery units increases from 1% to 5% as the cycle progresses from the first to the second cycle. In contrast, it can be seen that the balancing execution ratio of battery unit 5 does not change despite the change in cycle.

[0074] In this case, the diagnosing unit 147 can diagnose the first to fourth battery units and the sixth to tenth battery units as abnormal battery units because the difference between the balancing execution ratio (1%) of the first cycle determined as the reference ratio by the determining unit 145 and the balancing execution ratio (5%) of the second cycle is equal to or greater than a specified value (for example, 3%). Also, the diagnosing unit 147 can diagnose the fifth battery unit, whose balancing execution ratio has not changed, as a normal battery unit.

[0075] 4 is a flowchart showing the operation of the battery diagnostic device according to one embodiment, which will be explained using the configuration of FIG. The embodiment shown in Figure 4 is just one embodiment, and the order of steps according to various embodiments of the present invention may differ from that shown in Figure 4, such that some steps shown in Figure 4 may be omitted, the order between steps may be changed, or steps may be merged. For example, in Figure 4, operation 415 and / or operation 425 may be omitted.

[0076] Referring to FIG. 4 , in operation 405, the battery diagnostic device 101 may acquire the balancing execution time of the battery unit (111, 113, or 115). According to one embodiment, the battery diagnostic device 101 may acquire the balancing execution time of the battery unit (111, 113, or 115) from the electronic device 103 connected via a wired and / or wireless network. Here, the balancing execution time may refer to the time it takes to balance the state of charge (SOC) of the battery units 111, 113, and 115 to even out any deviations. Such balancing may be performed independently within the electronic device 103. Furthermore, the balancing execution time may refer to the time it takes for the battery unit (111, 113, or 115) to perform balancing from a first time point to a second time point.

[0077] According to one embodiment, the battery diagnostic device 101 can acquire the balancing execution time and / or balancing execution ratio of another battery unit of the same model as the battery unit (111, 113, or 115). According to one embodiment, the battery diagnostic device 101 can acquire the balancing execution time and / or balancing execution ratio of the other battery unit from an external device 105 (e.g., an external server) connected via a wired and / or wireless network. Here, the other battery unit may refer to a battery unit of the same model as the battery unit (111, 113, or 115) that is installed in another electronic device rather than the electronic device 103.

[0078] In operation 410, the battery diagnostic device 101 may calculate at least one balancing execution time. According to one embodiment, the battery diagnostic device 101 can calculate at least one balancing execution ratio based on the balancing execution time of the battery unit (111, 113, or 115) acquired in operation 405. For example, the battery diagnostic device 101 can calculate a balancing execution ratio for each of a plurality of cycles included in the period from the first time point to the second time point of the battery unit (111, 113, or 115).

[0079] According to one embodiment, the battery diagnostic device 101 can calculate a specified balancing execution ratio based on the balancing execution time during a specified period among the acquired balancing execution times and the specified period. In one embodiment, the battery diagnostic device 101 can calculate the specified balancing execution ratio based on a value obtained by dividing the balancing execution time during a specified period by the specified period.

[0080] According to one embodiment, the battery diagnostic device 101 may calculate an other balancing execution ratio based on the acquired balancing execution times during other periods prior to the specified period and the other periods. In one embodiment, the battery diagnostic device 101 may calculate an other balancing execution ratio based on a value obtained by dividing the other balancing execution time during the other period by the other period. Here, the other period may have the same or different duration as the specified period.

[0081] According to an embodiment, the battery diagnostic device 101 can calculate other balancing execution ratios based on the balancing execution times of the other battery units acquired in operation 405 .

[0082] In operation 415, the battery diagnostic device 101 may determine a reference ratio. According to one embodiment, the battery diagnostic device 101 may determine the reference ratio based on other balancing execution ratios. For example, the battery diagnostic device 101 may determine the other balancing execution ratio as the reference ratio. As another example, the battery diagnostic device 101 may determine the reference ratio as an average balancing execution ratio of multiple other balancing execution ratios obtained in operation 405 and / or calculated in operation 410.

[0083] According to one embodiment, the other balancing execution ratio may refer to another balancing execution ratio among at least one of the balancing execution ratios of the battery unit (111, 113, or 115) calculated in operation 410, which corresponds to another period before the specified period.

[0084] According to another embodiment, the other balancing execution ratio may refer to another balancing execution ratio of another battery unit obtained in operation 405 or calculated in operation 410 .

[0085] In operation 420, the battery diagnostic device 101 compares a designated balancing execution ratio among the at least one balancing execution ratio calculated in operation 410 with a reference ratio, and can diagnose an abnormality in the battery unit (111, 113, or 115). Here, the reference ratio may be a ratio stored in advance in the battery diagnostic device 101, or may be a ratio calculated in operation 415.

[0086] According to one embodiment, the battery diagnostic device 101 may diagnose the battery unit (111, 113, or 115) as an abnormal battery unit if the difference between the designated balancing execution ratio and the reference ratio is equal to or greater than a designated value. Also, the battery diagnostic device 101 may diagnose the battery unit (111, 113, or 115) as a normal battery unit if the difference is less than a designated value. Here, the designated value may be set variously depending on the specifications of the battery unit (111, 113, or 115).

[0087] In the case of an abnormal battery unit in which a short circuit or failure has occurred internally, the electronic device including the abnormal battery unit can increase the balancing execution rate by itself. The battery diagnostic device 101 can reduce the risk of damage to the electronic device 103 by quickly diagnosing whether or not there is an abnormality in the battery unit (111, 113, or 115) whose balancing execution rate has increased compared to the previous cycle using the above characteristics.

[0088] In operation 425, the battery diagnostic device 101 can perform an abnormality processing function based on the abnormality diagnosis result of the battery unit (111, 113, or 115). In one embodiment, the abnormality processing function can include a notification function or a short circuit function.

[0089] According to one embodiment, the battery diagnosis device 101 can perform the notification function for the abnormality diagnosis result of the battery unit (111, 113, or 115) and / or information related to the battery unit (111, 113, or 115). For example, the information related to the battery unit (111, 113, or 115) may include manufacturing information of the battery unit (111, 113, or 115) and / or location information of the battery unit (111, 113, or 115). Here, the location information of the battery unit (111, 113, or 115) may include information related to the location of the battery unit (111, 113, or 115) within the electronic device 103, more specifically, information related to the connection relationship between the battery units 111, 113, and 115.

[0090] According to one embodiment, the battery diagnostic device 101 can transmit abnormality diagnosis results of the battery unit (111, 113, or 115) and / or information about the battery unit (111, 113, or 115) to an external device 105 connected via a wired and / or wireless network.

[0091] According to one embodiment, the battery diagnostic device 101 can isolate the abnormal battery unit (111, 113, or 115) from the electronic device 103 based on the abnormal diagnosis result of the battery unit (111, 113, or 115). Here, the isolation can include electrical and / or mechanical isolation.

[0092] As used above, terms such as "comprise," "comprise," or "have" mean that the relevant element can be contained within the term, unless otherwise specified, and should be interpreted as meaning that other elements may be included, rather than excluding other elements. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments disclosed herein belong, unless otherwise defined. Commonly used terms, such as dictionary-defined terms, should be interpreted to be consistent with the contextual meaning of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined herein.

Claims

1. an acquisition unit that acquires a balancing execution time of the battery unit; a calculation unit that calculates at least one balancing execution ratio based on the balancing execution time; a diagnosis unit that compares a designated balancing execution ratio corresponding to a designated cycle with a reference ratio and diagnoses an abnormality in the battery unit; A battery diagnostic device comprising:

2. The battery diagnostic device according to claim 1 , wherein the calculation unit calculates the designated balancing execution ratio based on a value obtained by dividing a balancing execution time of the battery unit during the designated period by the designated period.

3. 3. The battery diagnostic device according to claim 1, further comprising a determination unit that determines the reference ratio based on another balancing execution ratio corresponding to another period before the specified period.

4. The battery diagnostic device according to claim 1 , further comprising a determination unit that determines the reference ratio based on other balancing execution ratios of other battery units of the same model as the battery unit.

5. 3. The battery diagnostic device according to claim 1, wherein the diagnosing unit diagnoses the battery unit as being abnormal when a difference between the designated balancing execution ratio and the reference ratio is equal to or greater than a designated value.

6. further comprising an abnormality processing unit that performs an abnormality processing function based on the abnormality diagnosis result of the battery unit; The battery diagnostic device according to claim 1 , wherein the abnormality processing function includes a notification function and / or a short-circuit function.

7. the abnormality processing unit performs the notification function for the abnormality diagnosis result and / or information about the battery unit, The battery diagnostic device according to claim 6 , wherein the information about the battery unit includes manufacturing information of the battery unit and / or location information of the battery unit.

8. The battery diagnostic device according to claim 1 or 2, wherein the battery unit is a battery cell, a battery module, a battery pack, or a battery rack.

9. An operation of acquiring a balancing execution time of the battery unit; calculating at least one balancing execution ratio based on the balancing execution time; an operation of comparing a designated balancing execution ratio corresponding to a designated period with a reference ratio and diagnosing an abnormality in the battery unit; A battery diagnostic method comprising:

10. 10. The battery diagnostic method according to claim 9, wherein the operation of calculating at least one balancing execution ratio includes an operation of calculating the specified balancing execution ratio based on a value obtained by dividing a balancing execution time of the battery unit during the specified period by the specified period.

11. 11. The battery diagnostic method according to claim 9, further comprising the step of determining the reference ratio based on another balancing execution ratio corresponding to another period before the specified period.

12. The battery diagnosis method according to claim 9 or 10, further comprising an operation of determining the reference ratio based on other balancing execution ratios of other battery units of the same model as the battery unit.

13. 11. The battery diagnostic method according to claim 9, wherein the operation of diagnosing the battery unit for an abnormality includes an operation of diagnosing the battery unit as an abnormal battery unit when a difference between the specified balancing execution ratio and the reference ratio is equal to or greater than a specified value.

14. The battery unit may further include an operation of performing an abnormality processing function based on the abnormality diagnosis result of the battery unit. The battery diagnostic method according to claim 9 or 10, wherein the abnormality processing function includes a notification function and / or a short-circuit function.

15. the operation of performing the abnormality processing function includes an operation of performing the notification function for the abnormality diagnosis result and / or information about the battery unit; The battery diagnosis method according to claim 14 , wherein the information about the battery unit includes manufacturing information of the battery unit and / or location information where the battery unit is located.

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