Battery diagnostic device and method

Abstract

A battery diagnostic device according to an embodiment of the present invention is a battery diagnostic device located in a battery system, and includes at least one processor; and a memory for storing at least one instruction executed by the at least one processor. Here, the at least one instruction may include an instruction to diagnose whether or not an abnormality exists in the battery based on a battery state value during charging / discharging of the battery; an instruction to generate a first diagnostic result when an abnormality occurs in the battery; an instruction to verify the validity of the first diagnostic result based on opening / closing of a door provided in a container that accommodates the battery; and an instruction to output the first diagnostic result as a final diagnostic result when the first diagnostic result is determined to be valid.

Description

[Technical field]

[0001] This application claims the benefit of the filing date of Korean Patent Application No. 10-2023-0015396, filed with the Korean Intellectual Property Office on February 6, 2023, and all of the contents disclosed in the documents of that Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a battery diagnostic device and method, and more particularly to a battery diagnostic device and method for preventing erroneous diagnosis due to opening and closing of a container in which a battery is housed. [Background technology]

[0003] Secondary batteries are batteries that can be reused by charging after discharging, and can be used as energy sources for small devices such as mobile phones, tablet PCs, and vacuum cleaners, as well as medium- to large-sized devices such as automobiles and Energy Storage Systems (ESS) for smart grids.

[0004] Secondary batteries are applied to systems in the form of assemblies such as battery modules in which multiple battery cells are connected in series and parallel, or battery packs in which battery modules are connected in series and parallel, depending on the requirements of the system. In the case of medium- to large-sized devices such as electric vehicles, a high-capacity battery system in which multiple battery packs are connected in parallel can be applied to meet the capacity requirements of the device.

[0005] Battery cells are manufactured through an assembly process and an activation process. Battery cells are assembled in a discharged state, so the activation process after the battery cell assembly process activates the positive electrode active material and forms a surface film (SEI, Solid Electrolyte Interface) on the negative electrode, enabling it to function as a battery. This activation process is called the formation process.

[0006] The activation process may be performed by repeatedly charging and discharging the battery cell according to preset voltage and current conditions using an electrode probe in a charge / discharge device. In addition, to test the performance of the battery cell, the battery cell may be mounted in a charge / discharge device used in the activation process, and electrical characteristics may be measured during the charging and discharging process of the battery cell.

[0007] During the battery charge / discharge test, the battery status value is monitored to diagnose the presence or absence of abnormalities such as the occurrence of fire. Here, if the door of the container in which the battery is housed is opened, the battery status value may be distorted due to temperature changes or physical impact, which may lead to a misdiagnosis.

[0008] In order to solve the problems of the conventional technology, an appropriate battery diagnosis technique is required to prevent erroneous diagnosis due to opening and closing of a container in which a battery is housed. Summary of the Invention [Problem to be solved by the invention]

[0009] SUMMARY OF THE PRESENT EMBODIMENT In order to solve the above problems, an object of the present invention is to provide a battery diagnostic device capable of preventing erroneous diagnosis due to opening and closing of a container in which a battery is housed.

[0010] Another object of the present invention to solve the above problems is to provide a battery diagnostic method using such a battery diagnostic device.

[0011] Another object of the present invention to solve the above problems is to provide a battery test system including such a battery diagnostic device. [Means for solving the problem]

[0012] To achieve the above object, a battery diagnostic device according to an embodiment of the present invention is a battery diagnostic device located in a battery system, and includes at least one processor; and a memory for storing at least one instruction executed by the at least one processor; wherein the at least one instruction includes an instruction to diagnose whether or not an abnormality exists in the battery based on a battery state value while charging / discharging the battery, an instruction to generate a first diagnostic result when an abnormality occurs in the battery, an instruction to verify the validity of the first diagnostic result based on opening / closing of a door provided in a container that accommodates the battery, and an instruction to output the first diagnostic result as a final diagnostic result when the first diagnostic result is determined to be valid.

[0013] The instruction to verify the validity of the first diagnostic result may include an instruction to check door status information at the time the battery status value was collected; an instruction to determine the first diagnostic result as valid if the door is confirmed to be in a closed state; and an instruction to determine the first diagnostic result as invalid if the door is confirmed to be in an open state.

[0014] The at least one instruction may further include an instruction to invalidate the first diagnostic result if the first diagnostic result is determined to be invalid.

[0015] The instruction to invalidate the first diagnostic result may further include an instruction to correct the battery state value using the door state information; and an instruction to re-diagnose whether or not there is an abnormality in the battery based on the corrected battery state value.

[0016] Here, the command to re-diagnose the battery for abnormality may include a command to generate a second diagnostic result if the re-diagnosis determines that an abnormality has occurred in the battery; and a command to output the second diagnostic result as a final diagnostic result.

[0017] The instructions for correcting the battery status value may include instructions for confirming a duration for which the door has been open; and instructions for correcting a battery status value associated with an internal temperature of the container based on the confirmed duration for which the door has been open.

[0018] The command to correct the battery state value may include a command to determine whether or not the battery state value should be corrected based on an amount of change in the battery state value.

[0019] Here, the command to determine whether or not the battery state value can be corrected may include a command to determine that the battery state value cannot be corrected if a change in the battery state value exceeds a preset threshold value.

[0020] To achieve the above-mentioned another object, a battery diagnostic method according to one embodiment of the present invention is a battery diagnostic method by a battery diagnostic device located in a battery system, and includes the steps of diagnosing whether or not there is an abnormality in the battery based on a battery state value while the battery is being charged and discharged; generating a first diagnostic result when an abnormality occurs in the battery; verifying the validity of the first diagnostic result based on opening and closing of a door provided in a container that houses the battery; and outputting the first diagnostic result as a final diagnostic result when the first diagnostic result is determined to be valid.

[0021] The step of verifying the validity of the first diagnostic result may include the steps of: checking door status information at the time the battery status value is collected; determining that the first diagnostic result is valid if the door is confirmed to be in a closed state; and determining that the first diagnostic result is invalid if the door is confirmed to be in an open state.

[0022] The battery diagnostic method may further include a step of invalidating the first diagnostic result if the first diagnostic result is determined to be invalid.

[0023] The step of invalidating the first diagnostic result may further include the steps of: correcting the battery state value using the door state information; and re-diagnosing whether or not there is an abnormality in the battery based on the corrected battery state value.

[0024] Here, the step of re-diagnosing the battery for abnormality may include: if the re-diagnosis determines that an abnormality has occurred in the battery, generating a second diagnostic result; and outputting the second diagnostic result as a final diagnostic result.

[0025] The step of correcting the battery state value includes the steps of: checking an open duration of the door; and

[0026] correcting a battery state value associated with an internal temperature of the container based on the confirmed open duration.

[0027] The step of correcting the battery state value may include the step of determining whether or not the battery state value should be corrected based on an amount of change in the battery state value.

[0028] Here, the step of determining whether or not the battery state value can be corrected may include the step of determining that the battery state value cannot be corrected if a change amount of the battery state value exceeds a preset threshold value.

[0029] In order to achieve the above-mentioned further object, a battery system according to an embodiment of the present invention is a battery testing system for testing a battery by charging and discharging the battery, and may include: a container for accommodating the battery and having an openable and closable door; and a battery diagnostic device for diagnosing whether or not the battery has an abnormality based on a battery state value while the battery is being charged and discharged. Here, the battery diagnostic device may generate a first diagnostic result when an abnormality occurs in the battery, verify the validity of the first diagnostic result based on the opening and closing of the door, and output the first diagnostic result as a final diagnostic result when the first diagnostic result is determined to be valid.

[0030] The battery diagnostic device can check door status information at the time the battery status value is collected, and if the door is confirmed to be in a closed state, determine the first diagnostic result to be valid, and if the door is confirmed to be in an open state, determine the first diagnostic result to be invalid.

[0031] When the first diagnostic result is determined to be invalid, the battery diagnostic device can invalidate the first diagnostic result.

[0032] The battery diagnostic device can correct the battery state value using the door state information, and re-diagnose whether or not there is an abnormality in the battery based on the corrected battery state value.

[0033] Here, if the re-diagnosis determines that an abnormality has occurred in the battery, the battery diagnostic device can generate a second diagnostic result and output the second diagnostic result as a final diagnostic result.

[0034] The battery diagnostic device can confirm the duration of the door being open, and correct a battery status value associated with the internal temperature of the container based on the confirmed duration of the door being open.

[0035] The battery diagnostic device can determine whether or not the battery state value should be corrected based on the amount of change in the battery state value.

[0036] Here, the battery diagnosis device may determine that correction to the battery state value is not possible if a change in the battery state value exceeds a preset threshold value. Effect of the Invention

[0037] According to the above-described embodiment of the present invention, the validity of the diagnosis result is verified based on the opening and closing of the container, and the final diagnosis result is output, thereby significantly improving the accuracy of diagnosis for the presence or absence of a battery abnormality. [Brief description of the drawings]

[0038] [Figure 1] The voltage values ​​monitored during the battery charge / discharge process are shown. [Diagram 2] This shows the capacity value monitored during the battery charge / discharge process. [Diagram 3] 1 is a block diagram showing a battery system according to an embodiment of the present invention. [Figure 4] 1 shows a container according to an embodiment of the present invention. [Diagram 5] FIG. 4 is an operational flow diagram of a battery diagnostic method according to an embodiment of the present invention. [Figure 6] FIG. 6 is an operational flow diagram of a battery diagnostic method according to another embodiment of the present invention. [Figure 7] 1 is a block diagram of a battery diagnostic device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] Since the present invention can be modified in various ways and has various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, it is understood that this is not intended to limit the present invention to the specific embodiment, but includes all modifications, equivalents, or alternatives within the spirit and technical scope of the present invention. Similar reference numerals are used for similar components while describing each drawing.

[0040] Terms such as first, second, A, B, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only to distinguish one component from another. For example, a first component may be named a second component, and similarly, a second component may be named a first component, without departing from the scope of the present invention. The term "and / or" includes a combination of multiple associated listed items or any of multiple associated listed items.

[0041] When a component is referred to as being "coupled" or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but there may also be other components in between. In contrast, when a component is referred to as being "directly coupled" or "directly connected" to another component, it should be understood that there are no other components in between.

[0042] The terms used in this application are merely used to describe certain embodiments and are not intended to limit the present invention. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this application, the terms "include" or "have" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and are not intended to preclude the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0043] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms as defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted as having an ideal or overly formal meaning unless expressly defined in this application.

[0044] Some terms used in this specification are defined as follows:

[0045] SOC (State of Charge) is the current charged state of the battery expressed as a percentage [%], and SOH (State of Health) is the current deterioration state of the battery expressed as a percentage [%].

[0046] A battery cell is the smallest unit that serves to store electric power, and a battery module refers to an assembly of multiple battery cells that are electrically connected together.

[0047] A battery pack or battery rack refers to a single-structure system that electrically connects modular units set by a battery manufacturer and can be monitored and controlled through a BMS (Battery Management System), and can be composed of multiple battery modules and one BPU (Battery Protection Unit) or protection device.

[0048] A battery bank can refer to a large-scale collection of battery rack systems that are made up of multiple battery racks connected in parallel. The battery bank BMS can monitor and control the rack BMS (RBMS) of each battery rack.

[0049] The battery assembly means an assembly including a plurality of electrically connected battery cells and applied to a specific system or device to function as a power supply source. Here, the battery assembly may mean a battery module, a battery pack, a battery rack, a battery bank, or the like, but the scope of the present invention is not limited to these.

[0050] Various embodiments of the present invention will now be described with reference to the accompanying drawings.

[0051] FIG. 1 shows voltage values ​​monitored during the charging and discharging of a battery, and FIG. 2 shows capacity values ​​monitored during the charging and discharging of a battery.

[0052] The battery test process may be performed by repeatedly charging and discharging the battery cell according to preset voltage and current conditions using a charge / discharge device, and measuring electrical characteristics during the charge / discharge process.

[0053] Generally, in order to ensure the safety of a battery test system during a battery charge / discharge test, the battery state value is monitored to diagnose the presence or absence of an abnormality, such as the occurrence of a fire.

[0054] For example, a battery diagnostic device provided in a battery system may be configured to monitor state values ​​such as a battery voltage, a battery surface temperature, and a container internal temperature during a battery charging / discharging process. Here, the battery diagnostic device may determine that an abnormality has occurred in the battery when the voltage and temperature exceed preset threshold values ​​or when the difference between the charge capacity and the discharge capacity calculated based on the battery state value exceeds a preset reference value.

[0055] Meanwhile, the charge / discharge test is performed with the battery housed inside a container having a certain internal space, but if the door of the container is opened and closed during the test, the status values ​​monitored for diagnosis may fluctuate.

[0056] Referring to Figures 1(A) and (B), when the container door is opened, it can be seen that the battery voltage fluctuates due to the physical impact that occurs at the time the door is opened (t1 and t2).

[0057] Also, referring to FIG. 2, when the container door is opened and closed, outside air flows in during the period from when the door is opened to when it is closed (t3 to t4, t5 to t6), causing the internal temperature value of the container to fluctuate, which may cause the calculated charge capacity and discharge capacity to fluctuate.

[0058] If the battery state value fluctuates or is distorted due to the opening and closing of the container door as described above, the battery diagnostic device may erroneously diagnose that an abnormality has occurred in the battery when there is no abnormality, thereby reducing the reliability of the diagnosis result.

[0059] The present invention is intended to solve these problems, and various embodiments of the present invention will be described in detail below with reference to FIGS.

[0060] FIG. 3 is a block diagram showing a battery system according to an embodiment of the present invention.

[0061] 3, the battery system may include a plurality of batteries 10 (BAT #1 to BAT #N), a container 100 that houses the plurality of batteries, a battery diagnostic device 200, and an administrator terminal 300. The battery system may further include a charging / discharging device (not shown) electrically connected to the plurality of batteries 10 to charge and discharge the batteries.

[0062] In the embodiment, the battery system according to the present invention may correspond to a battery test system, but the scope of the present invention is not limited to such an individual. For example, the battery diagnostic device 200 according to the present invention may be applied to an ESS (Energy Storage System) in addition to a battery test system for evaluating the performance of a battery, and may be configured to diagnose the presence or absence of an abnormality in a battery during a battery charge / discharge process.

[0063] The battery 10 of the present invention may refer to a battery cell or a battery assembly.

[0064] The battery diagnosis device 200 may be configured to monitor a battery state value during charging / discharging of the battery and diagnose whether or not the battery is abnormal based on the battery state value, where the battery state value may include at least one of a voltage, a current, a surface temperature of the battery, and an internal temperature of a container.

[0065] When it is determined that an abnormality has occurred in the battery, the battery diagnosis device 200 can generate a diagnosis result including one or more of a battery identifier, an abnormality type, and an abnormality occurrence time point. Here, the battery diagnosis device 200 can output the generated diagnosis result to the manager terminal 300.

[0066] The administrator terminal 300 may correspond to a computing device managed by an administrator of the battery system. The administrator terminal 300 may be configured to be connected to the battery diagnosis device 200 through a wired or wireless network, receive a diagnosis result from the battery diagnosis device 200, and output the diagnosis result through a display device.

[0067] FIG. 4 shows a container according to an embodiment of the present invention.

[0068] Referring to FIG. 4, a container 100 may have a certain space therein for accommodating batteries and may include doors 111 and 112 that can be opened and closed.

[0069] The container 100 shown in Fig. 4 includes left and right doors 111, 112, but the scope of the present invention is not limited to the structure shown in Fig. 4. In other words, any container including an openable and closable structure should be considered as a container according to the present invention, regardless of the number, shape, connection structure, or name of the doors.

[0070] In an embodiment, the container 100 may further include a door lock device 120 for controlling opening and closing of the door. For example, the door lock device 120 may correspond to a digital door lock including a lock button or a numeric input pad that can be input by an operator.

[0071] The container 100 may be configured to include a detection sensor (not shown) capable of sensing the open / closed state of the door. Here, the detection sensor may be included inside the door lock device 120 or may be fixedly coupled to a specific area of ​​the doors 111 and 112.

[0072] The battery diagnosis device 200 may be configured to receive door status information from a detection sensor in cooperation with the detection sensor, and may check whether the door is open / closed, the time when the door is opened, the time when the door is closed, and the duration of the door being opened based on the received door status information.

[0073] FIG. 5 is an operational flow diagram of the battery diagnostic method according to the embodiment of the present invention.

[0074] When the battery starts to be charged or discharged, the battery diagnosis device 200 may monitor a battery state value during the charging or discharging process (S510). Here, the battery state value may include one or more of a voltage, a current, a surface temperature of the battery, and an internal temperature of a container.

[0075] Thereafter, the battery diagnostic device 200 can diagnose whether or not there is an abnormality in the battery based on the battery state value (S520).

[0076] If it is determined that an abnormality has occurred in the battery as a result of the diagnosis (YES in S520), the battery diagnosis device 200 may generate a first diagnosis result (S530). Here, the first diagnosis result may include one or more of the following information: an identifier of the battery in which an abnormality has occurred, a type of the abnormality, and a time point when the abnormality occurred.

[0077] Thereafter, the battery diagnostic device 200 can verify the validity of the first diagnostic result based on the opening and closing of the door provided on the container 100 (S540).

[0078] More specifically, when the first diagnostic result is generated due to the occurrence of a battery abnormality, the battery diagnostic device 200 can check the door state information at the time when the battery state value on which the first diagnostic result is based was collected. Here, when it is confirmed that the door is in a closed state, the battery diagnostic device 200 can determine that the first diagnostic result is valid. Also, when it is confirmed that the door is in an open state, the battery diagnostic device 200 can determine that the first diagnostic result is invalid.

[0079] When the first diagnostic result is determined to be valid (YES in S550), the battery diagnostic device 200 can output the first diagnostic result to the manager terminal 300 as the final diagnostic result (S560).

[0080] When the first diagnostic result is determined to be invalid (NO in S550), the battery diagnosis device 200 can invalidate the first diagnostic result (S570). That is, when the first diagnostic result is generated based on the battery state value measured with the container door open, the first diagnostic result may be processed as invalid and not be output to the manager terminal 300.

[0081] According to the above-described embodiment of the present invention, the validity of the diagnosis result is verified based on the opening and closing of the door, and then the final diagnosis result is output to the outside, thereby preventing erroneous diagnosis due to data fluctuation or distortion caused by the door being opened.

[0082] FIG. 6 is an operational flow diagram of a battery diagnostic method according to another embodiment of the present invention.

[0083] When charging / discharging of the battery is started, the battery diagnostic device 200 can monitor the battery state value during the charging / discharging process (S610).

[0084] Thereafter, the battery diagnostic device 200 can diagnose whether or not the battery has an abnormality based on the battery state value (S620).

[0085] If it is determined that an abnormality has occurred in the battery as a result of the diagnosis (YES in S620), the battery diagnosis device 200 may generate a first diagnosis result (S630). Here, the first diagnosis result may include one or more of the following information: an identifier of the battery in which an abnormality has occurred, a type of the abnormality, and a time point when the abnormality occurred.

[0086] Thereafter, the battery diagnostic device 200 can verify the validity of the first diagnostic result based on the opening and closing of a door provided on the container 100 (S640).

[0087] When the first diagnostic result is determined to be valid (YES in S650), the battery diagnostic device 200 can output the first diagnostic result to the manager terminal 300 as the final diagnostic result (S660).

[0088] When the first diagnostic result is determined to be invalid (NO in S650), the battery diagnostic device 200 can invalidate the first diagnostic result (S671).

[0089] After invalidating the first diagnostic result, the battery diagnostic device 200 can correct the battery state value and re-diagnose the presence or absence of an abnormality in the battery based on the corrected battery state value.

[0090] In the embodiment, the battery diagnosis device 200 can determine whether or not the battery state value can be corrected based on the amount of change in the battery state value (S642). Here, the battery diagnosis device 200 can determine that correction is not possible if the amount of change in the battery state value exceeds a preset threshold, and can determine that correction is possible if the amount of change is equal to or less than the threshold.

[0091] For example, a battery may be subjected to a physical shock when a container door is opened, causing the battery voltage to fluctuate. If the change in the voltage or the slope of the voltage curve exceeds a preset threshold, it may be determined that re-diagnosis by correction is not possible.

[0092] If it is determined that correction to the battery state value is not possible (NO in S672), the final diagnostic result is not transmitted to the administrator terminal 300 due to invalidation processing of the first diagnostic result, and the battery diagnostic device 200 can return to S610 and perform the battery monitoring process.

[0093] If it is determined that the battery state value can be corrected (YES in S672), the battery diagnosis device 200 may correct the battery state value using the door state information (S673). Here, the battery diagnosis device 200 may check the container door open period, and correct the battery state value associated with the internal temperature of the container based on the confirmed open period.

[0094] In the embodiment, the battery diagnosis device 200 can correct the battery capacity value based on the relational expression (Equation 1) between the door open period and the capacity change per unit time.

[0095] [Number 1]

[0096] d_C=k1*ln(t)+k2

[0097] (where d_C is the capacitance correction value, t is the temperature inside the container, and k1 and k2 are constants calculated experimentally.)

[0098] Specifically, the battery capacity may be calculated based on the internal temperature of the container, but when the container door is opened, outside air may flow in and the internal temperature of the container may fluctuate, resulting in a calculated capacity value different from the actual capacity value. Here, the battery diagnosis device 200 calculates a capacity correction value based on the door open period (open maintenance time) and the above Equation 1, and can correct the battery capacity value by adding the calculated capacity correction value to the capacity value before correction.

[0099] For example, if k1 is defined as 0.0047 and k2 is defined as 0.0148, the temperature before the door is opened is 10 degrees, the temperature immediately before closing after the door is opened is 15 degrees, and the door open period is 60 seconds, the capacitance correction value can be calculated as follows.

[0100] d_C={(0.0047*ln(10)+0.0148)-(0.0047*ln(15)+0.0148)}*60

[0101] Thereafter, the battery diagnostic device 200 can re-diagnose the presence or absence of an abnormality in the battery based on the battery state value corrected in S673 (S674).

[0102] If it is determined that an abnormality has occurred in the battery as a result of the re-diagnosis (YES in S674), the battery diagnosis device 200 may generate a second diagnosis result and output the second diagnosis result to the manager terminal 300 as a final diagnosis result (S675). Here, the second diagnosis result may include one or more pieces of information including an identifier of the battery in which an abnormality has occurred, the type of the abnormality, and the time point at which the abnormality occurred.

[0103] If the re-diagnosis determines that no abnormality has occurred in the battery (NO in S674), the final diagnosis result is not transmitted to the administrator terminal 300 due to the invalidation of the first diagnosis result and the re-diagnosis result (no abnormality), and the battery diagnosis device 200 returns to S610 and can perform the battery monitoring process.

[0104] FIG. 7 is a block diagram of a battery diagnostic device according to an embodiment of the present invention.

[0105] The battery diagnosis device 700 according to an embodiment of the present invention can be configured to be included in a battery system or a battery test system, and can include at least one processor 710, a memory 720 for storing at least one instruction executed by the processor, and a transceiver 730 connected to a network for communication.

[0106] The at least one instruction may include an instruction to diagnose whether or not there is an abnormality in the battery based on a battery state value while the battery is being charged or discharged; an instruction to generate a first diagnostic result if an abnormality occurs in the battery; an instruction to verify the validity of the first diagnostic result based on opening and closing of a door provided in a container that houses the battery; and an instruction to output the first diagnostic result as a final diagnostic result if the first diagnostic result is determined to be valid.

[0107] The instruction to verify the validity of the first diagnostic result may include an instruction to check door status information at the time the battery status value was collected; an instruction to determine the first diagnostic result as valid if the door is confirmed to be in a closed state; and an instruction to determine the first diagnostic result as invalid if the door is confirmed to be in an open state.

[0108] The at least one instruction may further include an instruction to invalidate the first diagnostic result if the first diagnostic result is determined to be invalid.

[0109] The instruction to invalidate the first diagnostic result may further include an instruction to correct the battery state value using the door state information; and an instruction to re-diagnose whether or not there is an abnormality in the battery based on the corrected battery state value.

[0110] Here, the command to re-diagnose the battery for abnormality may include a command to generate a second diagnostic result if the re-diagnosis determines that an abnormality has occurred in the battery; and a command to output the second diagnostic result as a final diagnostic result.

[0111] The instructions to correct the battery status value may include instructions to confirm a duration for which the door has been open; and instructions to correct a battery status value associated with an internal temperature of the container based on the confirmed duration for which the door has been open.

[0112] The command to correct the battery state value may include a command to determine whether or not the battery state value should be corrected based on an amount of change in the battery state value.

[0113] Here, the command to determine whether or not the battery state value can be corrected may include a command to determine that the battery state value cannot be corrected if a change amount of the battery state value exceeds a preset threshold value.

[0114] The battery diagnosis device 700 may further include an input interface device 740, an output interface device 750, a storage device 760, etc. The components included in the battery diagnosis device 700 are connected to each other by a bus 770 to communicate with each other.

[0115] Here, the processor 710 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which the method according to the embodiment of the present invention is performed. The memory (or storage device) may be composed of at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory may be composed of at least one of a read only memory (ROM) and a random access memory (RAM).

[0116] The operation of the method according to the embodiment of the present invention can be embodied as a computer readable program or code in a computer readable recording medium. The computer readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. In addition, the computer readable recording medium can be distributed to computer systems connected via a network, and the computer readable program or code can be stored and executed in a distributed manner.

[0117] Some aspects of the invention have been described in the context of an apparatus, but it may also be presented in terms of a corresponding method, where a block or apparatus corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method may be presented in terms of a corresponding block or item or feature of a corresponding apparatus. Some or all of the method steps may be performed by (or using) a hardware apparatus, such as, for example, a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, one or more of the most important method steps may be performed by such an apparatus.

[0118] Although the present invention has been described with reference to preferred embodiments thereof, those skilled in the art will understand that various modifications and variations of the present invention can be made without departing from the spirit and scope of the present invention as set forth in the following claims. [Explanation of symbols]

[0119] 10:Battery 100: Container 111, 112: Door 120: Door lock device 200, 700: Battery diagnostic device 300: Administrator terminal

Claims

1. A battery diagnostic device located in a battery system, At least one processor; and a memory for storing at least one instruction to be executed by said at least one processor; The at least one instruction: a command to diagnose whether or not the battery is abnormal based on a battery state value during charging / discharging of the battery; instructions for generating a first diagnostic result if an anomaly occurs in the battery; instructions for verifying the validity of the first diagnostic result based on the opening and closing of a door provided on a container that houses the battery; and if the first diagnostic result is determined to be valid, outputting the first diagnostic result as a final diagnostic result; Battery diagnostic device.

2. The instructions for verifying the validity of the first diagnostic result include: instructions for determining door status information at the time the battery status value was collected; instructions for validating the first diagnostic result if the door is confirmed to be closed; and instructions for determining that the first diagnostic result is invalid if the door is confirmed to be open; The battery diagnostic device according to claim 1 .

3. The at least one instruction: and if the first diagnostic result is determined to be invalid, further comprising an instruction to invalidate the first diagnostic result. The battery diagnostic device according to claim 2 .

4. The instruction to invalidate the first diagnostic result includes: instructions for correcting the battery status value using the door status information; and and a command to re-diagnose whether or not the battery is abnormal based on the corrected battery state value. The battery diagnostic device according to claim 3 .

5. The command to re-diagnose the battery for abnormality is instructions for generating a second diagnostic result when it is determined that an abnormality has occurred in the battery as a result of the re-diagnosis; and an instruction to output the second diagnosis result as a final diagnosis result; The battery diagnostic device according to claim 4.

6. The command to correct the battery state value includes: an instruction to confirm the open period of said door; and instructions for correcting a battery state value associated with an internal temperature of the container based on the identified open duration; The battery diagnostic device according to claim 4.

7. The command to correct the battery state value includes: a command to determine whether or not the battery state value should be corrected based on an amount of change in the battery state value; The battery diagnostic device according to claim 4.

8. The instruction to determine whether the correction is possible is and determining that a correction to the battery state value is not possible if a change in the battery state value exceeds a preset threshold. The battery diagnostic device according to claim 7.

9. A battery diagnostic method by a battery diagnostic device located in a battery system, comprising: diagnosing whether or not the battery is abnormal based on a battery state value during charging / discharging of the battery; generating a first diagnostic result when an abnormality occurs in the battery; verifying the validity of the first diagnosis result based on the opening and closing of a door provided on a container that houses the battery; and If the first diagnostic result is determined to be valid, outputting the first diagnostic result as a final diagnostic result. Battery diagnostic methods.

10. The step of verifying the validity of the first diagnostic result includes: determining door status information at the time the battery status value was collected; determining that the first diagnosis result is valid if the door is confirmed to be in a closed state; and determining that the first diagnosis result is invalid if the door is confirmed to be in an open state; The battery diagnostic method according to claim 9 .

11. If the first diagnostic result is determined to be invalid, invalidating the first diagnostic result. The battery diagnostic method according to claim 10.

12. The step of invalidating the first diagnostic result includes: calibrating the battery status value using the door status information; and re-diagnosing the battery for abnormality based on the corrected battery state value; The battery diagnostic method according to claim 11.

13. The step of re-diagnosing the battery for abnormality includes: generating a second diagnosis result when it is determined that an abnormality has occurred in the battery as a result of the re-diagnosis; and outputting the second diagnostic result as a final diagnostic result; The battery diagnostic method according to claim 12.

14. The step of correcting the battery state value includes: checking the door open period; and correcting a battery state value associated with an internal temperature of the container based on the confirmed open duration. The battery diagnostic method according to claim 12.

15. The step of correcting the battery state value includes: determining whether or not the battery state value should be corrected based on an amount of change in the battery state value; The battery diagnostic method according to claim 12.

16. The step of determining whether or not the correction is possible includes: If the change in the battery state value exceeds a preset threshold, determining that the battery state value is not correctable; The battery diagnostic method according to claim 15.

17. A battery test system for testing a battery by charging and discharging the battery, comprising: A container that houses the battery and has an openable door; and a battery diagnostic device for diagnosing whether or not the battery is abnormal based on a battery state value during charging and discharging of the battery; The battery diagnostic device includes: if an abnormality occurs in the battery, a first diagnostic result is generated, and the validity of the first diagnostic result is verified based on the opening and closing of the door, and if the first diagnostic result is determined to be valid, the first diagnostic result is output as a final diagnostic result. Battery test system.

18. The battery diagnostic device includes: checking door state information at the time when the battery state value was collected, and determining that the first diagnostic result is valid if the door is confirmed to be in a closed state, and determining that the first diagnostic result is invalid if the door is confirmed to be in an open state; 18. The battery testing system of claim 17.

19. The battery diagnostic device includes: If the first diagnostic result is determined to be invalid, invalidating the first diagnostic result.

20. The battery testing system of claim 18.

20. The battery diagnostic device includes: correcting the battery state value using the door state information, and re-diagnosing the battery for abnormality based on the corrected battery state value.

20. The battery testing system of claim 19.

21. The battery diagnostic device includes: if it is determined that an abnormality has occurred in the battery as a result of the re-diagnosis, a second diagnostic result is generated, and the second diagnostic result is output as a final diagnostic result.

21. The battery testing system of claim 20.

22. The battery diagnostic device includes: determining a duration of the door being open, and correcting a battery state value associated with an internal temperature of the container based on the determined duration of the door being open; 21. The battery testing system of claim 20.

23. The battery diagnostic device includes: determining whether or not the battery state value should be corrected based on the amount of change in the battery state value; 21. The battery testing system of claim 20.

24. The battery diagnostic device includes: If the change amount of the battery state value exceeds a preset threshold, it is determined that the battery state value cannot be corrected; 24. The battery testing system of claim 23.

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