Battery diagnosis device and method therefor

Abstract

The present document relates to a battery diagnosis device comprising: an interface for acquiring current current-information and current battery-temperature information corresponding to a battery unit; and a processor which compares, if the current current-information is less than the threshold value, existing battery temperature information and the current battery-temperature information corresponding to the battery unit, and which diagnoses an abnormality in the battery unit on the basis of the comparison result.

Description

Battery diagnostic device and method

[0001] Cross-citation with related applications

[0002] The present invention claims the benefit of priority based on Korean Patent Application No. 10-2024-0129185 filed on September 24, 2024, and includes all contents disclosed in the document of said Korean patent application as part of this specification.

[0003] Technology field

[0004] The embodiments disclosed in this document relate to a battery diagnostic device and a method thereof.

[0005] Over the past few years, rechargeable battery technology has made rapid advancements and is playing a pivotal role in various industrial sectors. Rechargeable batteries are rechargeable and can be interpreted to encompass not only conventional nickel-cadmium batteries, nickel-metal hybrid batteries, and lead-acid batteries, but also lithium-ion batteries. In particular, lithium-ion batteries play an essential role in electric vehicles (EVs), energy storage systems (ESS), and portable electronic devices.

[0006] Battery temperature is a critical factor affecting the maintenance of performance and safety. Batteries store and release energy through chemical reactions, and temperature fluctuations can occur during this process. Changes in internal battery temperature directly impact operating characteristics, and failure to maintain an appropriate temperature can lead to degraded battery performance or serious safety issues.

[0007] Generally, batteries perform optimally within a specific temperature range. However, exceeding this range increases internal resistance and reduces efficiency. For example, at low temperatures, chemical reactions slow down, reducing the discharge rate and potentially limiting capacity. Conversely, at high temperatures, chemical reactions accelerate excessively, which can shorten battery life and degrade output performance.

[0008] Furthermore, battery overheating can lead to safety issues. When a battery overheats, gas may be generated inside the battery, and in severe cases, there is a risk of explosion. Therefore, to optimize battery performance and ensure safety, it is necessary to continuously monitor the battery temperature to diagnose abnormal battery behavior in advance.

[0009] According to the embodiments disclosed in this document, a battery diagnostic device and a method capable of diagnosing abnormalities in a battery unit by monitoring the temperature of the battery unit are provided.

[0010] According to the embodiments disclosed in this document, a battery diagnostic device and a method capable of diagnosing abnormalities in a battery unit based on current information, battery temperature information, and ambient temperature information of the battery unit are provided.

[0011] According to the embodiments disclosed in this document, a battery diagnostic device and a method capable of diagnosing an abnormality in a battery unit based on a comparison of current battery temperature information and existing battery temperature information of the battery unit are provided.

[0012] The technical problems of this document are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the descriptions below.

[0013] A battery diagnostic device according to one embodiment of the present document may include an interface for obtaining current current information and current battery temperature information corresponding to a battery unit, and a processor for comparing existing battery temperature information and current battery temperature information corresponding to the battery unit and diagnosing an abnormality of the battery unit based on the comparison result when the current current information is less than a threshold value.

[0014] In one embodiment, the processor may increase a diagnostic count when the existing battery temperature information is less than the current battery temperature information, and diagnose an abnormality of the battery unit based on the diagnostic count.

[0015] In one embodiment, the processor can diagnose the battery unit as an abnormal battery unit if the diagnostic count is greater than or equal to a threshold count.

[0016] In one embodiment, the processor may store the current battery temperature information as the existing battery temperature information when the diagnostic count is less than the threshold count.

[0017] In one embodiment, the interface further acquires current ambient temperature information, and the processor increases a diagnostic count when the current ambient temperature information is less than the current battery temperature information and the existing battery temperature information is less than the current battery temperature information, and can diagnose an abnormality of the battery unit based on the diagnostic count.

[0018] In one embodiment, the processor may store the current battery temperature information as the existing battery temperature information when the current ambient temperature information is less than the current battery temperature information.

[0019] In one embodiment, the processor can generate notification information when an abnormality in the battery unit is diagnosed.

[0020] In one embodiment, the interface can acquire the current battery temperature information after a specific time from the point in time when the existing battery temperature information corresponding to the battery unit is stored.

[0021] A battery diagnostic method according to one embodiment of the present document may include the steps of obtaining current current information and current battery temperature information corresponding to a battery unit, comparing existing battery temperature information and current battery temperature information corresponding to the battery unit when the current current information is less than a threshold value, and diagnosing an abnormality of the battery unit based on the comparison result.

[0022] In one embodiment, the step of diagnosing an abnormality of the battery unit may increase a diagnosis count when the existing battery temperature information is less than the current battery temperature information, and diagnose an abnormality of the battery unit based on the diagnosis count.

[0023] In one embodiment, the step of diagnosing an abnormality in the battery unit may diagnose the battery unit as an abnormal battery unit if the diagnosis count is greater than or equal to a threshold count.

[0024] In one embodiment, the battery diagnostic method may further include the step of storing the current battery temperature information as the existing battery temperature information when the diagnostic count is less than a threshold count.

[0025] In one embodiment, the battery diagnostic method further includes the step of additionally obtaining current ambient temperature information, and the step of diagnosing an abnormality of the battery unit may increase a diagnostic count when the current ambient temperature information is less than the current battery temperature information and the existing battery temperature information is less than the current battery temperature information, and diagnose an abnormality of the battery unit based on the diagnostic count.

[0026] In one embodiment, the battery diagnostic method may further include the step of storing the current battery temperature information as the existing battery temperature information when the current ambient temperature information is less than the current battery temperature information.

[0027] In one embodiment, the battery diagnostic method may further include the step of generating notification information when an abnormality of the battery unit is diagnosed.

[0028] In one embodiment, the current battery temperature information may be obtained after a specific time from the point in time when the existing battery temperature information corresponding to the battery unit is stored.

[0029] This technology can diagnose abnormalities in a battery unit by monitoring the temperature of the battery unit.

[0030] In addition, the present technology can diagnose abnormalities in a battery unit based on current information and temperature information of the battery unit.

[0031] In addition, the present technology can diagnose abnormalities in a battery unit based on a comparison of the current battery temperature information and existing battery temperature information of the battery unit.

[0032] In addition, various effects that can be identified directly or indirectly through this document may be provided.

[0033] FIG. 1 is a block diagram for illustrating a battery pack in a battery diagnostic device and a battery diagnostic method according to one embodiment of the present document.

[0034] FIG. 2 is a block diagram illustrating the configuration of a battery diagnostic device according to one embodiment of the present document.

[0035] FIG. 3 is a drawing illustrating an example of current battery temperature information according to one embodiment of the present document.

[0036] FIG. 4 is a flowchart illustrating a battery diagnostic method according to one embodiment of the present document.

[0037] FIG. 5 is a flowchart for explaining a battery diagnostic method according to one embodiment of the present document.

[0038] FIG. 6 is a block diagram illustrating the hardware configuration of a computing system for performing a battery diagnostic method according to one embodiment of the present document.

[0039] Hereinafter, with reference to the attached drawings, this document is described in detail so that those skilled in the art to which this document pertains can easily implement it. However, it should be understood that the present technology may be implemented in various different forms and includes various modifications, equivalents, and / or alternatives to the embodiments of the present technology.

[0040] To clarify this document, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0041] Furthermore, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of this document, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0042] Embodiments of the present document will be described in detail below with reference to FIGS. 1 to 5.

[0043] FIG. 1 is a block diagram for explaining a battery pack in a battery diagnostic device and battery diagnostic method according to one embodiment of the present document.

[0044] Referring to FIG. 1, the battery pack (1) may include a battery unit (10), a sensor unit (14), a switching unit (16), and a battery management device (20). At this time, the battery pack (1) may be equipped with a plurality of battery units (10), sensor units (14), switching units (16), and battery management devices (20).

[0045] According to one embodiment, the battery unit (10) can supply power to a target device (not shown). To this end, the battery unit (10) may be electrically connected to the target device. Here, the target device may include an electrical, electronic, or mechanical device that operates by receiving power from the battery pack (1). For example, the target device may be an electric vehicle (EV), but is not limited thereto.

[0046] According to one embodiment, the battery unit (10) may include at least one rechargeable battery cell (12). Here, the battery cell (12) may be a basic unit of a battery cell capable of charging and discharging electrical energy. For example, the battery cell (12) may be a lithium-ion (Li-ion) battery, a lithium-ion polymer (Li-ion polymer) battery, a nickel-cadmium (Ni-Cd) battery, a nickel-hydrogen (Ni-MH) battery, etc., but is not limited thereto.

[0047] According to one embodiment, a plurality of battery units (10) may be connected in series or in parallel. For example, a battery unit (10) may be a battery module, a battery bank, or a set of battery cells (cell-to-pack structure).

[0048] According to one embodiment, the sensor unit (14) can obtain information related to the battery unit (10). According to one embodiment, the sensor unit (14) can obtain values ​​(or information) related to the state of each of the battery unit (10) or battery cells (12). In one embodiment, the values ​​related to the state may include one or more values ​​for the voltage, current, resistance, state of charge (SOC), state of health (SOH), or temperature of the battery cell, or a combination thereof.

[0049] According to one embodiment, the sensor unit (14) can provide information of each of the plurality of battery units (10) to the battery management system (20).

[0050] According to one embodiment, the switching unit (16) may include an element for controlling the current flow for charging or discharging the battery unit (10). For example, the switching unit (16) may include at least one relay and / or magnetic contactor, etc., depending on the specifications of the battery pack (1).

[0051] According to one embodiment, the battery management device (20) can monitor the voltage, current, temperature, etc. of the battery pack (1) and control or manage the battery pack (1) to prevent overcharging and over-discharging. For example, the battery management device (20) may include a plurality of terminals as an interface that receives values ​​measured by the various parameters described above, and a circuit connected to these terminals to perform processing of the received values. In addition, the battery management device (20) may control the sensor unit (14) and / or the switching unit (16). For example, the battery management device (20) may be connected to a plurality of battery units (10) to monitor the status of each of the plurality of battery units (10) and control the ON / OFF of relays or contactors.

[0052] According to one embodiment, the operation of the battery management device (20) can be performed by a battery management system (BMS) in the vehicle, as well as by various devices such as a server, cloud, charger, or charger / discharger.

[0053] The upper controller (2) can transmit control signals for a plurality of battery units (10) to the battery management device (20). Accordingly, the operation of the battery management device (20) can be controlled based on the signals applied from the upper controller (2).

[0054] According to one embodiment, the battery management device (20) may include the battery diagnostic device (200) of FIG. 2. According to another embodiment, the battery management device (20) may be a different system from the battery diagnostic device (200) of FIG. 2. That is, the battery diagnostic device (200) of FIG. 2 may be included in the battery pack (1) or may be configured as another device outside the battery pack (1). For convenience of explanation, the following description assumes that the battery diagnostic device (200) is configured as another device outside the battery pack (1). Furthermore, the operation of the battery diagnostic device (200) below may be performed by a battery management system (BMS) within the vehicle, as well as by various devices such as a server, cloud, charger, or charger / discharger.

[0055] FIG. 2 is a block diagram illustrating the configuration of a battery diagnostic device according to one embodiment of the present document. FIG. 3 is a diagram illustrating an example of current battery temperature information according to one embodiment of the present document.

[0056] First, referring to FIG. 2, a battery diagnostic device (200) according to one embodiment of the present document may include an interface (210), a memory (220), and a processor (230).

[0057] According to one embodiment, the interface (210) can acquire data corresponding to the battery unit (10, see FIG. 1). Specifically, the interface (210) can acquire at least one of current data, voltage data, resistance data, and temperature data of the battery unit (10).

[0058] According to one embodiment, the interface (210) can obtain current current information and current battery temperature information corresponding to the battery unit (10). Specifically, the interface (210) can obtain current current information and current battery temperature information by receiving the current value and temperature value of the battery unit (10) at the current time from the sensor unit (14, see FIG. 1). Additionally, the interface (10) may include a sensor unit configured to obtain current current information and / or current battery temperature information of the battery unit (10). The sensor unit may include measuring means such as an ammeter or a thermometer for measuring current current information and / or current battery temperature information of the battery unit (10).

[0059] According to one embodiment, the interface (210) can obtain current battery temperature information after a specific time from the point in time when existing battery temperature information corresponding to the battery unit (10) is stored. Specifically, the interface (210) can obtain current battery temperature information based on a fixed time interval, i.e., a storage period, from the point in time when existing battery temperature information is stored. In addition, the interface (210) can obtain current current information and current ambient temperature information based on the storage period. For example, if the storage period is 30 minutes, the interface (210) can newly obtain current battery temperature information, which is the value of the battery temperature at the current point in time, after 30 minutes have elapsed from the point in time when current battery temperature information is obtained and stored as existing battery temperature information.

[0060] According to one embodiment, the interface (210) can obtain current ambient temperature information. Specifically, the interface (210) can obtain current ambient temperature information by communicating with an external device configured to measure the ambient temperature and measuring the ambient temperature value at the current time. For example, the external device may include a vehicle's climate control system (Citric Control System), a Body Control Module (BCM), etc. Additionally, the interface (210) can obtain current ambient temperature information from the external device through communication such as a Controller Area Network (CAN), Local Interconnect Network (LIN), Inter-Integrated Circuit (I2C), or Serial Peripheral Interface (SPI).

[0061] According to one embodiment, the memory (220) may store at least one instruction. Specifically, the memory (220) may store at least one instruction for performing a battery diagnostic method according to an embodiment of the present document. Additionally, the memory (220) may temporarily and / or permanently store data acquired by the interface (210), data input to the processor (230), and / or the operation result of the processor (230).

[0062] According to various embodiments, the memory (220) may include volatile memory and / or non-volatile memory. For example, the volatile memory may include at least one of SRAM (Static RAM), DRAM (Dynamic RAM), SDRAM (Synchronous DRAM), and DDR SDRAM (Double Date Rate SDRAM). Additionally, the non-volatile memory may include at least one of ROM, PROM (Programmable ROM), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), flash memory, magnetic disk, and optical disk.

[0063] According to one embodiment, the processor (230) can execute at least one instruction stored in memory (220). For example, the processor (230) may include at least one of a CPU (Central Processing Unit), MCU (Microcontroller Unit), DSP (Digital Signal Processor), FPGA (Field-Programmable Gate Array), and ASIC (Application-Specific Integrated Circuit). Additionally, the processor (230) may be composed of one or more units. For example, the processor (230) may be composed of a single-core processor, a multi-core processor, or a multi-processor system.

[0064] According to one embodiment, the processor (230) can compare existing battery temperature information corresponding to the battery unit (10) with current battery temperature information when the current current information is less than a threshold value. Specifically, the processor (230) can compare existing battery temperature information corresponding to the battery unit (10) with current battery temperature information when no current flows through the battery unit (10), such as during a rest period after charging or discharging the battery. For example, assuming the threshold value is 1A, the processor (230) can identify whether the existing battery temperature information is less than the current battery temperature information by comparing existing battery temperature information corresponding to the battery unit (10) with current battery temperature information when the current current information is less than 1A. Accordingly, the processor (230) can diagnose an abnormality in the battery unit (10) by identifying cases where the temperature rises even though no current flows through the battery unit (10).

[0065] According to one embodiment, the processor (230) may store the current battery temperature information as existing battery temperature information when the current ambient temperature information is less than the current battery temperature information. Specifically, the processor (230) may store the current battery temperature information as existing battery temperature information when the current current information is less than a threshold value and the current ambient temperature information is less than the current battery temperature information.

[0066] For example, the processor (230) may store current battery temperature information as existing battery temperature information to diagnose abnormal battery behavior when current does not flow in the battery unit (10) and the battery temperature is higher than the current ambient temperature. That is, the processor (230) may store current battery temperature information as existing battery temperature information to identify a situation where the battery temperature continues to rise even though current does not flow in the battery unit (10) and the battery temperature should gradually decrease to the current ambient temperature. Accordingly, the interface (210) acquires current battery temperature information at a specific time elapsed from the point in time when existing battery temperature information is stored, and the processor (230) can compare the newly acquired current battery temperature information with the existing battery temperature information.

[0067] According to one embodiment, the processor (230) can diagnose an abnormality in the battery unit (10) based on a comparison result. Specifically, the processor (230) can increase a diagnosis count if the existing battery temperature information is less than the current battery temperature information, and diagnose an abnormality in the battery unit based on the diagnosis count.

[0068] According to one embodiment, the processor (230) may diagnose the battery unit (10) as an abnormal battery unit if the diagnosis count is greater than or equal to a threshold count. Specifically, the threshold count may be set as a standard for the total accumulated number of diagnosis counts or as a standard for the number of consecutive increases in the diagnosis count.

[0069] For example, assuming the threshold count is 3 times based on the total accumulated count, the processor (230) can diagnose the battery unit (10) as an abnormal battery unit if the diagnosis count is accumulated and increased 3 times or more. In another example, assuming the threshold count is 3 times based on the number of consecutive increases, the processor (230) can diagnose the battery unit (10) as an abnormal battery unit if the diagnosis count is increased 3 times or more consecutively.

[0070] According to one embodiment, the processor (230) may store current battery temperature information as existing battery temperature information when the diagnostic count is less than the threshold count. Specifically, the processor (230) may increase the diagnostic count when the existing battery temperature information is less than the current battery temperature information, and may store the current battery temperature information as existing battery temperature information when the increased diagnostic count is less than the threshold count. Accordingly, the interface (210) obtains current battery temperature information at a specific time elapsed from the point in time when the existing battery temperature information is stored, and the processor (230) may compare the newly obtained current battery temperature information with the existing battery temperature information.

[0071] According to one embodiment, the processor (230) can increase the diagnosis count when the current ambient temperature information is less than the current battery temperature information and the existing battery temperature information is less than the current battery temperature information, and can diagnose an abnormality of the battery unit (10) based on the diagnosis count. Specifically, the processor (230) can compare the existing battery temperature information and the current battery temperature information when the current current information is less than the threshold and the current ambient temperature information is less than the current battery temperature information, and can diagnose an abnormality of the battery unit (10) based on the comparison result. For example, when the current current information is less than the threshold and the current ambient temperature information is less than the current battery temperature information, the processor (230) increases the diagnosis count, and when the diagnosis count is greater than or equal to the threshold count, the battery unit (10) can be diagnosed as an abnormal battery unit.

[0072] According to one embodiment, the processor (230) may generate notification information when an abnormality in the battery unit (10) is diagnosed. Specifically, the notification information may include at least one of the degree of temperature rise of the battery unit (10), the temperature change during the last three storage cycles of the battery unit (10), and a message indicating an abnormality in the battery unit (10).

[0073] The operation of the processor (230) will be explained in more detail below with reference to FIG. 3.

[0074] Referring to FIG. 3, the processor (230) can compare current battery temperature information obtained at regular time intervals with existing battery temperature information.

[0075] According to one embodiment, the interface (210) acquires current battery temperature information at regular time intervals, and the processor (230) can increase the diagnostic count when the existing battery temperature information is less than the current battery temperature information by comparing the existing battery temperature information acquired and stored in the previous cycle with the current battery temperature information. That is, since the processor (230) increases the diagnostic count when the battery temperature rises above the existing battery temperature information, the diagnostic count can be increased at time t2, t3, t4, t5, and t7, respectively.

[0076] Generally, in the case of technologies that diagnose the state of a battery based on the temperature of the battery, the state of the battery is diagnosed as abnormal when the current battery temperature exceeds a specific value, so the state of the battery unit (10) can be diagnosed for the first time at time t5 when the current battery temperature information is above the battery threshold temperature. On the other hand, according to one embodiment of the present document, the processor (230) can continuously monitor the temperature of the battery unit (10) and increase the diagnosis count even when the current battery temperature information is below the battery threshold temperature, so there is an effect of being able to diagnose the state of the battery unit (10) in advance.

[0077] In addition, other general techniques for diagnosing the condition of a battery based on the temperature of the battery diagnose the condition of the battery as abnormal when the difference between the current battery temperature and the battery temperature obtained immediately prior exceeds a threshold, so the condition of the battery unit (10) can be diagnosed at time t4 and t5 when the difference between the current battery temperature information and the existing battery temperature information exceeds a threshold.

[0078] On the other hand, according to one embodiment of the present document, the processor (230) can increase the diagnosis count if the current battery temperature information is greater than or equal to the existing battery temperature information, even if the difference between the current battery temperature information and the existing battery temperature information does not exceed a threshold, thus having the effect of diagnosing the state of the battery unit (10) in advance.

[0079] FIG. 4 is a flowchart illustrating a battery diagnostic method according to an embodiment of the present document. Hereinafter, it is assumed that the battery diagnostic device (200) of FIG. 2 performs each step of FIG. 4. Each step of FIG. 4 may be performed sequentially, but is not necessarily performed sequentially. For example, the order of each step may be changed, and multiple steps may be performed in parallel.

[0080] Referring to FIG. 4, in step S410, the battery diagnostic device (200) can obtain current current information and current battery temperature information corresponding to the battery unit (10). Specifically, the battery diagnostic device (200) can obtain current current information, which is a value of the current of the battery unit (10) at the current time, and current battery temperature information, which is a value of the temperature at the current time. For example, the battery diagnostic device (200) can obtain current current information and current battery temperature information through the interface (210). As another example, the battery diagnostic device (200) can obtain current current information and current battery temperature information through the sensor unit (14).

[0081] For example, the battery diagnostic device (200) can additionally obtain current ambient temperature information. Specifically, the battery diagnostic device (200) is electrically connected to an external device and can obtain current ambient temperature information, which is a value of the ambient temperature at the current time measured from the external device.

[0082] In step S420, the battery diagnostic device (200) can compare the existing battery temperature information corresponding to the battery unit (10) with the current battery temperature information when the current current information is less than a threshold value. Specifically, the battery diagnostic device (200) can quantitatively compare the current battery temperature information with the existing battery temperature information to identify whether the existing battery temperature information is less than the current battery temperature information.

[0083] In step S430, the battery diagnostic device (200) can diagnose an abnormality in the battery unit (10) based on the comparison result. Specifically, the battery diagnostic device (200) can increase the diagnostic count if the existing battery temperature information is less than the current battery temperature information, and diagnose an abnormality in the battery unit (10) based on the diagnostic count.

[0084] For example, the battery diagnostic device (200) can diagnose the battery unit (10) as an abnormal battery unit if the diagnostic count is greater than or equal to the threshold count. Additionally, the battery diagnostic device (200) can store the current battery temperature information as existing battery temperature information if the diagnostic count is less than the threshold count.

[0085] For example, the battery diagnostic device (200) can increase the diagnostic count if the current ambient temperature information is less than the current battery temperature information and the existing battery temperature information is less than the current battery temperature information. Additionally, the battery diagnostic device (200) can diagnose an abnormality in the battery unit based on the diagnostic count.

[0086] For example, the battery diagnostic device (200) can store the current battery temperature information as existing battery temperature information when the current ambient temperature information is less than the current battery temperature information. That is, the battery diagnostic device (200) can diagnose an abnormality in the battery unit (10) by storing the current battery temperature information as existing battery temperature information when the current battery temperature information is greater than or equal to the current ambient temperature information, and by comparing it with the current battery temperature information obtained after the storage cycle has elapsed.

[0087] For example, the battery diagnostic device (200) can generate notification information when an abnormality in the battery unit (10) is diagnosed. Specifically, the notification information may include at least one of the degree of temperature rise of the battery unit (10), the temperature change during the last three storage cycles of the battery unit (10), and a message indicating an abnormality in the battery unit (10).

[0088] FIG. 5 is a flowchart for explaining a battery diagnostic method according to one embodiment of the present document.

[0089] In the following, it is assumed that the battery diagnostic device (200) of FIG. 2 performs each operation of FIG. 5. Additionally, in the description of FIG. 5, the operations described as being performed by the battery diagnostic device (200) can be understood as being controlled by a processor (230) included in the battery diagnostic device (200).

[0090] Referring to FIG. 5, in operation (501), the processor (230) of the battery diagnostic device (200) can obtain current current information, current battery temperature information, and current ambient temperature information. According to one embodiment, the current current information, current battery temperature information, and current ambient temperature information can be obtained by the interface (210). Additionally, the current current information, current battery temperature information, and current ambient temperature information can be obtained at a constant time period (hereinafter referred to as a storage period).

[0091] In operation (503), the processor (230) can identify whether the current current information is below a threshold. For example, if the current current information is above the threshold, the processor (230) can perform operation (501) after a storage period has elapsed. Additionally, if the current current information is below the threshold, the processor (230) can perform operation (505).

[0092] In operation (505), the processor (230) can identify whether the current ambient temperature information is less than the current battery temperature information. For example, if the current ambient temperature information is greater than or equal to the current battery temperature information, the processor (230) can perform operation (501) after the storage cycle has elapsed. Additionally, if the current ambient temperature information is less than the current battery temperature information, the processor (230) can perform operation (507).

[0093] In operation (507), the processor (230) can store the current battery temperature information as existing battery temperature information. After storing the current battery temperature information as existing battery temperature information, the processor (230) can perform operation (509).

[0094] In operation (509), the processor (230) can identify whether a storage period has elapsed. For example, if a storage period has elapsed since the point in time when the existing battery temperature information was stored, the processor (230) can perform operation (513) after reacquiring the current battery temperature information. Additionally, if a storage period has not elapsed since the point in time when the existing battery temperature information was stored, the processor (230) can perform operation (511).

[0095] In operation (511), the processor (230) may wait until the storage cycle has elapsed if the storage cycle has not elapsed. For example, if the storage cycle has not elapsed, the processor (230) may not perform the operation of obtaining current battery temperature information and the operation of comparing existing battery temperature information with current battery temperature information. After waiting until the storage cycle has elapsed, the processor (230) may perform operation (513).

[0096] In operation (513), the processor (230) can identify whether the existing battery temperature information is less than the current battery temperature information. For example, if the existing battery temperature information is greater than or equal to the current battery temperature information, the processor (230) can store the current battery temperature information as the existing battery temperature information and perform operation (501) after the storage cycle has elapsed. Additionally, if the existing battery temperature information is less than the current battery temperature information, the processor (230) can perform operation (515).

[0097] In operation (515), the processor (230) may increase the diagnostic count if the existing battery temperature information is less than the current battery temperature information. If the processor (230) increases the diagnostic count, the processor (230) may perform operation (517).

[0098] In operation (517), the processor (230) can identify whether the diagnostic count is greater than or equal to the threshold count. For example, if the diagnostic count is less than the threshold count, the processor (230) can perform operation (507). Additionally, if the diagnostic count is greater than or equal to the threshold count, the processor (230) can perform operation (519).

[0099] In operation (519), the processor (230) can diagnose an abnormality in the battery unit if the diagnosis count is greater than or equal to the threshold count. For example, the processor (230) can diagnose the battery unit as an abnormal battery unit if the diagnosis count is greater than or equal to the threshold count.

[0100] FIG. 6 is a block diagram showing the hardware configuration of a computing system for performing a battery diagnostic method according to one embodiment of the present document.

[0101] Referring to FIG. 6, a computing system (600) according to one embodiment disclosed in this document may include an MCU (610), memory (620), an input / output I / F (630), and a communication I / F (640).

[0102] The MCU (610) may be a processor that executes various programs stored in memory (620) (e.g., battery cell data collection program, graph generation program, data analysis program, data decomposition algorithm, normalization program, battery cell diagnosis program, etc.), processes various information including characteristic data and potential variables of the battery cell through these programs, and performs the functions of the battery diagnosis device (200) shown in FIGS. 1 to 5.

[0103] The memory (620) can store various programs such as a battery cell data collection program, a graph generation program, a data analysis program, a data decomposition algorithm, a normalization program, and a battery cell diagnosis program.

[0104] These memories (620) may be provided in multiple quantities as needed. The memories (620) may be volatile memories or non-volatile memories. As volatile memories, the memory (620) may use RAM, DRAM, SRAM, etc. As non-volatile memories, the memory (620) may use ROM, PROM, EAROM, EPROM, EEPROM, flash memory, etc. The examples of the listed memories (620) are merely examples and are not limited to these examples.

[0105] The input / output I / F (630) can provide an interface that enables data transmission and reception between an input device (not shown), such as a keyboard, mouse, or touch panel, and an output device (not shown), such as a display, and the MCU (610).

[0106] The communication I / F (640) is configured to transmit and receive various data with a server and may be various devices capable of supporting wired or wireless communication. For example, the battery diagnostic device (200) can transmit and receive various information, including the shape model of a battery cell, from a separately provided external server via the communication I / F (640).

[0107] In this way, a computer program according to one embodiment disclosed in this document may be implemented as a module that performs, for example, the functions illustrated in FIG. 2, by being written to memory (620) and processed by an MCU (610).

[0108] As described above, even though all components constituting the embodiments disclosed in this document have been described as being combined or operating in combination, the embodiments disclosed in this document are not necessarily limited to such embodiments. That is, within the scope of the purposes of the embodiments disclosed in this document, all components may be selectively combined in one or more ways to operate.

[0109] Furthermore, terms such as "include," "compose," or "have" as described above, unless specifically stated otherwise, mean that the relevant component may be inherent; thus, they should be interpreted as allowing for the inclusion of additional components rather than excluding them. All terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the embodiments disclosed in this document pertain, unless otherwise defined. Commonly used terms, such as those defined in advance, should be interpreted in accordance with their contextual meanings in the relevant technology and, unless explicitly defined in this document, should not be interpreted in an ideal or overly formal sense.

[0110] The foregoing disclosure outlines the features of several embodiments to enable those skilled in the art to better understand the aspects of the present disclosure. Those skilled in the art will understand that the present disclosure can be readily used as a basis for designing or modifying other structures to perform the same purpose or achieve the same advantages as the embodiments introduced herein. Furthermore, those skilled in the art will recognize that such equivalent configurations do not depart from the scope of the present disclosure and that various changes, substitutions, and modifications may be made in the present specification without departing from the scope of the present disclosure.

[0111] Although the present document has been described above with reference to limited embodiments and drawings, the present document is not limited thereto, and various implementations are possible within the scope of the technical concept of the present document and the equivalent scope of the claims described below by a person skilled in the art to which the present document belongs.

Claims

1. An interface for acquiring current current information and current battery temperature information corresponding to a battery unit; and If the above current current information is less than a threshold value, the existing battery temperature information corresponding to the battery unit and the above current battery temperature information are compared, and A battery diagnostic device comprising: a processor that diagnoses an abnormality of the battery unit based on a comparison result.

2. In Paragraph 1, A battery diagnostic device, wherein the processor increases a diagnostic count when the existing battery temperature information is less than the current battery temperature information, and diagnoses an abnormality of the battery unit based on the diagnostic count.

3. In Paragraph 2, The above processor is a battery diagnostic device that diagnoses the battery unit as an abnormal battery unit when the above diagnostic count is greater than or equal to a threshold count.

4. In Paragraph 2, A battery diagnostic device, wherein the processor stores the current battery temperature information as the existing battery temperature information when the diagnostic count is less than the threshold count.

5. In Paragraph 1, The above interface additionally acquires current ambient temperature information, and A battery diagnostic device, wherein the processor increases a diagnostic count when the current ambient temperature information is less than the current battery temperature information and the existing battery temperature information is less than the current battery temperature information, and diagnoses an abnormality of the battery unit based on the diagnostic count.

6. In Paragraph 5, A battery diagnostic device wherein the processor stores the current battery temperature information as the existing battery temperature information when the current ambient temperature information is less than the current battery temperature information.

7. In Paragraph 1, The above processor is a battery diagnostic device that generates notification information when an abnormality in the battery unit is diagnosed.

8. In Paragraph 1, The above interface is a battery diagnostic device that acquires the current battery temperature information after a specific time from the point in time when existing battery temperature information corresponding to the battery unit is stored.

9. A step of obtaining current current information and current battery temperature information corresponding to the battery unit; If the current current information is less than a threshold value, a step of comparing existing battery temperature information corresponding to the battery unit with the current battery temperature information; and A battery diagnosis method comprising the step of diagnosing an abnormality of the battery unit based on a comparison result.

10. In Paragraph 9, The step of diagnosing an abnormality in the above battery unit is, A battery diagnosis method that increases a diagnosis count when the above-mentioned existing battery temperature information is less than the above-mentioned current battery temperature information, and diagnoses an abnormality of the battery unit based on the above-mentioned diagnosis count.

11. In Paragraph 10, The step of diagnosing an abnormality in the above battery unit is, A battery diagnosis method that diagnoses the battery unit as an abnormal battery unit when the above diagnosis count is greater than or equal to a threshold count.

12. In Paragraph 10, A battery diagnosis method further comprising the step of storing the current battery temperature information as the existing battery temperature information when the above diagnosis count is less than the threshold count.

13. In Paragraph 9, It further includes a step of additionally obtaining current ambient temperature information; and The step of diagnosing an abnormality in the above battery unit is, If the above current ambient temperature information is less than the above current battery temperature information and the above existing battery temperature information is less than the above current battery temperature information, increase the diagnostic count, and A battery diagnostic method for diagnosing an abnormality of the battery unit based on the above diagnostic count.

14. In Paragraph 13, A battery diagnostic method further comprising the step of storing the current battery temperature information as the existing battery temperature information when the current ambient temperature information is less than the current battery temperature information.

15. In Paragraph 9, A battery diagnosis method further comprising the step of generating notification information when an abnormality of the battery unit is diagnosed.

16. In Paragraph 9, A battery diagnostic method in which the current battery temperature information is obtained after a specific time from the point in time when the existing battery temperature information corresponding to the battery unit is stored.

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