Apparatus and method for diagnosing battery

Abstract

An apparatus for diagnosing a battery according to an embodiment of the present invention comprises: a prerequisite determination unit configured to determine a prerequisite preset to correspond to content of battery diagnosis, obtain prerequisite information corresponding to the prerequisite from an external device, and determine whether the prerequisite information corresponds to the prerequisite; and determining whether the precondition is satisfied based on the obtained precondition information; and a state diagnosis unit configured to obtain battery information corresponding to a content of the diagnosis, and diagnose a state of the battery based on the content of the diagnosis and the battery information according to whether each precondition is satisfied.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application No. 10-2022-0064999 filed in Korea on May 26, 2022, the disclosure of which is incorporated herein by reference.

[0002] The present disclosure relates to an apparatus and method for diagnosing a battery, and more particularly, to an apparatus and method for diagnosing a battery capable of diagnosing a battery. Background Art

[0003] Recently, the demand for portable electronic products such as notebook computers, video cameras, and portable phones has increased dramatically, and electric vehicles, energy storage batteries, robots, satellites, etc. have been developed in earnest. Therefore, high-performance batteries that allow repeated charging and discharging are being actively studied.

[0004] Currently commercially available batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium batteries, etc. Among these batteries, lithium batteries have attracted much attention because they have almost no memory effect compared to nickel batteries and also have extremely low self-discharge rate and high energy density.

[0005] When such a battery is installed in a vehicle's drive unit or ESS (Energy Storage System), the BMS (Battery Management System) diagnoses the battery's status and generates and outputs a DTC (Diagnostic Trouble Code) for the diagnosis result. Since the DTC is indicated in the battery's diagnosis result, the battery's status at the time of diagnosis can be confirmed by the DTC.

[0006] Typically, the BMS may first check whether a diagnosis can be performed before diagnosing the state of the battery. Specifically, the BMS may check the prerequisites preset for each diagnostic content, and only when all the prerequisites are met, diagnose the state of the battery for that diagnostic content. The reason why the BMS checks the prerequisites first is because, if the prerequisites are not met, even if the state of the battery is diagnosed, the diagnostic result may not be accurate. Therefore, the BMS is designed to diagnose the state of the battery for the relevant diagnostic content when all the prerequisites are met.

[0007] However, when there are multiple prerequisites for a certain diagnostic content, if even one prerequisite is not satisfied, the battery status cannot be diagnosed for the diagnostic content. Therefore, since the DTC of the diagnostic content is not generated, it is not possible to confirm both the reason why the diagnosis is not performed for the diagnostic content and the battery status. Summary of the invention

[0008] Technical issues

[0009] The present disclosure is designed to solve the problems of the related art, and therefore the present disclosure aims to provide a device and method for diagnosing a battery, which can diagnose the state of the battery based on whether the prerequisites are met, and if the prerequisites are not met, record the reasons for not meeting the prerequisites and predictively diagnose the state of the battery.

[0010] These and other purposes and advantages of the present disclosure can be understood from the following detailed description and will become more fully apparent from the exemplary embodiments of the present disclosure. In addition, it will be easily understood that the purposes and advantages of the present disclosure can be achieved by the means shown in the appended claims and their combinations.

[0011] Technical Solution

[0012] According to an aspect of the present disclosure, a device for diagnosing a battery may include: a prerequisite judgment unit, the prerequisite judgment unit being configured to determine a prerequisite preset to correspond to a diagnostic content of the battery, obtain prerequisite information corresponding to the prerequisite from an external device, and determine whether the prerequisite is satisfied based on the obtained prerequisite information; and a status diagnosis unit, the status diagnosis unit being configured to obtain battery information corresponding to the diagnostic content, and diagnose the status of the battery based on the diagnostic content and the battery information according to whether the prerequisite is satisfied.

[0013] When the prerequisite is satisfied, the state diagnosis unit may be configured to diagnose the state of the battery by comparing the battery information corresponding to the diagnosis content with the diagnosis content.

[0014] When the prerequisite is not satisfied, the state diagnosis unit may be configured to assume that the prerequisite is satisfied, and diagnose the expected state of the battery by comparing battery information corresponding to the diagnosis content with the diagnosis content.

[0015] When there are a plurality of the preconditions, the state diagnosis unit may be configured to diagnose the expected state of the battery if any one of the plurality of preconditions is not satisfied.

[0016] According to another aspect of the present disclosure, an apparatus for diagnosing a battery may further include a storage unit configured to store at least one diagnostic content of a state of the battery and at least one prerequisite corresponding to the diagnostic content.

[0017] The state diagnosis unit may be configured to store a diagnosis result of the battery, a diagnosis type indicating the state of the battery, and whether the prerequisite is satisfied in the storage unit.

[0018] The status diagnosis unit may be configured to determine a DTC flag indicating a diagnosis result of the battery, a diagnosis type flag indicating the diagnosis type, and a prerequisite flag indicating whether the prerequisite is satisfied, and map and store the DTC flag, the diagnosis type flag, and the prerequisite flag in the storage unit.

[0019] When there are multiple prerequisites, the status diagnosis unit may be configured to determine a prerequisite flag for each of the multiple prerequisites.

[0020] A battery pack according to another aspect of the present disclosure may include an apparatus for diagnosing a battery according to an aspect of the present disclosure.

[0021] A vehicle according to another aspect of the present disclosure may include an apparatus for diagnosing a battery according to an aspect of the present disclosure.

[0022] According to another aspect of the present disclosure, a method for diagnosing a battery may include the following steps: a prerequisite determination step, the prerequisite determination step determines a prerequisite that is preset to correspond to the diagnostic content of the battery; a prerequisite information acquisition step, the prerequisite information acquisition step obtains prerequisite information corresponding to the prerequisite from an external device; a prerequisite satisfaction determination step, the prerequisite satisfaction determination step determines whether the prerequisite is satisfied based on the obtained prerequisite information; a battery information acquisition step, the battery information acquisition step obtains battery information corresponding to the diagnostic content; and a battery status diagnosis step, the battery status diagnosis step diagnoses the status of the battery based on the diagnostic content and the battery information according to whether the prerequisite is satisfied.

[0023] Beneficial Effects

[0024] According to an aspect of the present disclosure, the state of the battery can be diagnosed after first determining whether a prerequisite is satisfied. Therefore, the accuracy and reliability of the battery state diagnosis result can be improved.

[0025] In addition, according to an aspect of the present disclosure, there is an advantage in that the expected state of the battery can be diagnosed even when at least one precondition is not satisfied.

[0026] In addition, according to an aspect of the present disclosure, a diagnosis result, a diagnosis type, and whether a prerequisite is satisfied are mapped and stored, and thus an advantage is that various information on a state diagnosis of a battery is provided.

[0027] The effects of the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art through the description of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the above disclosure, are used to provide a further understanding of the technical features of the present disclosure, and thus the present disclosure shall not be construed as being limited to the accompanying drawings.

[0029] Figure 1 is a diagram schematically illustrating an apparatus for diagnosing a battery according to an embodiment of the present disclosure.

[0030] Figure 2 is a diagram schematically illustrating an apparatus for diagnosing a battery and an external device according to an embodiment of the present disclosure.

[0031] Figure 3 is a diagram schematically illustrating a list of prerequisites for reference by an apparatus for diagnosing a battery according to an embodiment of the present disclosure.

[0032] Figure 4 is a diagram illustrating an example of a list of prerequisites according to an embodiment of the present disclosure.

[0033] Figure 5 is a diagram schematically illustrating mapping information stored in an apparatus for diagnosing a battery according to an embodiment of the present disclosure.

[0034] Figure 6 is a diagram showing an example of mapping information according to an embodiment of the present disclosure.

[0035] Figure 7 is a diagram schematically showing an exemplary configuration of a battery pack according to another embodiment of the present disclosure.

[0036] Figure 8 is a diagram schematically showing a vehicle according to another embodiment of the present disclosure.

[0037] Fig. 9 is a diagram schematically illustrating a method for diagnosing a battery according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] It should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to the general meaning and dictionary meaning, but should be interpreted based on the meaning and concepts corresponding to the technical aspects of the present disclosure on the basis of the principle allowing the inventor to define terms suitable for the best description.

[0039] Therefore, the descriptions presented herein are merely preferred examples for illustrative purposes and are not intended to limit the scope of the present disclosure, so it should be appreciated that other equivalents and modifications may be obtained without departing from the scope of the present disclosure.

[0040] Furthermore, in describing the present disclosure, when it is considered that a detailed description of related known elements or functions makes the key subject matter of the present disclosure unclear, the detailed description is omitted herein.

[0041] Terms including ordinal numbers such as “first,” “second,” etc. may be used to distinguish one element from another among various elements, but are not intended to limit the elements by the terms.

[0042] Throughout the specification, when a part is referred to as “including” or “comprising” any element, it means that the part may further include other elements, without excluding the other elements, unless specifically stated otherwise.

[0043] In addition, throughout the specification, when a part is referred to as being “connected” to another part, it is not limited to the case where they are “directly connected” but also includes the case where they are “indirectly connected” with another element interposed therebetween.

[0044] Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings.

[0045] Figure 1 is a diagram schematically illustrating an apparatus 100 for diagnosing a battery according to an embodiment of the present disclosure. Figure 2 is a diagram schematically illustrating an apparatus 100 for diagnosing a battery and an external device 200 according to an embodiment of the present disclosure.

[0046] Reference Figure 1 , the apparatus 100 for diagnosing a battery according to an embodiment of the present disclosure may include a prerequisite judgment unit 110 and a state diagnosis unit 120 .

[0047] The prerequisite determination unit 110 may be configured to determine a prerequisite, which is preset to correspond to the diagnosis content of the battery.

[0048] Specifically, the prerequisite judgment unit 110 may first receive the diagnosis content of the battery. Preferably, the prerequisite judgment unit 110 may receive the diagnosis content about the battery from the external device 200. Figure 2 In the embodiment of the present invention, the prerequisite judgment unit 110 may be connected to the external device 200 to communicate by wire and / or wirelessly. The external device 200 is a device for diagnosing the battery state, and may be, for example, a device or a server that can test the battery.

[0049] Specifically, the diagnostic content may be content that compares the state of the battery with a predetermined value. For example, the diagnostic content may include comparison content about whether the temperature of the battery is lower than a predetermined temperature value or whether the voltage of the battery is higher than a predetermined voltage value. As a specific example, the diagnostic content may include information about "whether the temperature of the battery is lower than -30°C".

[0050] At least one prerequisite corresponding to the diagnosis content may be pre-stored in the form of a prerequisite list. Specifically, the prerequisite corresponding to the diagnosis target factor among the diagnosis content may be pre-stored in the form of a prerequisite list.

[0051] Figure 3 is a diagram schematically showing a list of prerequisites for reference by the apparatus 100 for diagnosing a battery according to an embodiment of the present disclosure. Figure 3 , the prerequisite list starts with record 0, and each record can include predetermined prerequisites.

[0052] The prerequisite judgment unit 110 can determine the prerequisite corresponding to the diagnostic content of the battery by referring to the list of prerequisites. As in the previous embodiment, it is assumed that the diagnostic content is "whether the battery temperature is lower than -30°C". The diagnostic target factor included in the diagnostic content is "temperature". Therefore, the prerequisite judgment unit 110 can determine at least one prerequisite corresponding to "temperature" in the list of prerequisites.

[0053] Figure 4 is a diagram showing an example of a list of prerequisites according to an embodiment of the present disclosure. Specifically, Figure 4 1 is a diagram showing only the prerequisites corresponding to the previously described diagnostic content ("Is the battery temperature lower than -30°C"). The prerequisite judgment unit 110 can determine a first prerequisite of whether the voltage of the auxiliary battery (Aux battery) is 7V or higher, a second prerequisite of whether the voltage of the auxiliary battery is 18V or lower, a third prerequisite of whether the CAN (Controller Area Network) signal "X" is 1, a fourth prerequisite of whether DTC (Diagnostic Trouble Code) "AA" is not set, a fifth prerequisite of whether DTC "BB" is not set, and a sixth prerequisite of whether DTC "CC" is not set.

[0054] The prerequisite judgment unit 110 may be configured to obtain prerequisite information corresponding to the prerequisite from the external device 200 .

[0055] Specifically, the prerequisite judgment unit 110 may obtain the prerequisite information from the external device 200 to verify the determined prerequisite.

[0056] For example, assuming that the first to sixth prerequisites of the previous embodiment have been determined, the prerequisite judgment unit 110 can obtain the voltage of the auxiliary battery, the value of the CAN signal "X", whether DTC "AA" is set, whether DTC "BB" is set, and whether DTC "CC" is set from the external device 200.

[0057] The prerequisite determination unit 110 may be configured to determine whether the prerequisite is satisfied based on the obtained prerequisite information.

[0058] Specifically, the prerequisite judgment unit 110 can determine whether the prerequisite corresponding to the diagnostic content is met by substituting the obtained prerequisite information into the corresponding prerequisite. Here, only when the prerequisite is met, the state of the battery can be diagnosed as normal. In other words, when all the prerequisites corresponding to the diagnostic content are met, the battery state according to the diagnostic content can be diagnosed as normal.

[0059] For example, in the previous embodiment, it is assumed that the prerequisite information received by the prerequisite judgment unit 110 is as follows.

[0060] 1) Auxiliary battery voltage: 7V

[0061] 2) Value of CAN signal "X": 1

[0062] 3) Is DTC "AA" set: Not set

[0063] 4) Is DTC "BB" set: Not set

[0064] 5) Is DTC "CC" set: Not set

[0065] Reference Figure 4 , since the voltage of the auxiliary battery is 7V, the first prerequisite and the second prerequisite can be satisfied. In addition, since the value of the CAN signal "X" is 1, the third prerequisite can also be satisfied. In addition, since DTCs "AA", "BB" and "CC" are not set, the fourth to sixth prerequisites can also be satisfied. Therefore, the prerequisite judgment unit 110 can determine that all prerequisites corresponding to the diagnostic content are satisfied.

[0066] The state diagnosis unit 120 may be configured to obtain battery information corresponding to the diagnosis content.

[0067] Specifically, the state diagnosis unit 120 may be configured to obtain battery information corresponding to the diagnosis content and the voltage, current, temperature and SOC of the battery. Preferably, the state diagnosis unit 120 may obtain information related to the diagnosis target factor included in the diagnosis content.

[0068] For example, the state diagnosis unit 120 may obtain battery information corresponding to the diagnosis content from a measurement unit that measures the battery state or a storage unit that stores battery state information. As another example, the state diagnosis unit 120 may obtain battery information required for battery state diagnosis from an external server or the like.

[0069] For example, as in the previous embodiment, it is assumed that the diagnosis content is “whether the temperature of the battery is lower than −30° C.” The state diagnosis unit 120 may obtain the current temperature information of the battery as the battery information.

[0070] The state diagnosis unit 120 may be configured to diagnose the state of the battery based on the diagnosis content and the battery information according to whether the prerequisite is satisfied.

[0071] Specifically, the status diagnosis unit 120 can diagnose the status of the battery by substituting the obtained battery information into the diagnostic content. Preferably, the battery status can be determined in advance corresponding to whether the diagnostic content is met. For example, if the battery information satisfies the diagnostic content, the battery status may be normal, and if the battery information does not satisfy the diagnostic content, the battery status may be abnormal. On the contrary, if the battery information satisfies the diagnostic content, the battery status may be abnormal, and if the battery information does not satisfy the diagnostic content, the battery status may be normal. That is, the battery status regarding whether the diagnostic content is met can be preset based on the correspondence between the diagnostic target factor and the comparison value, or can be set during the process of generating the diagnostic content.

[0072] As in the previous embodiment, it is assumed that the diagnostic content is "Is the battery temperature lower than -30°C?" If the diagnostic content is satisfied, the battery temperature is lower than -30°C, so the battery state can be diagnosed as abnormal. Conversely, if the diagnostic content is not satisfied, the battery temperature exceeds -30°C, so the battery state can be diagnosed as normal.

[0073] The device 100 for diagnosing a battery according to an embodiment of the present disclosure is characterized in that it is first determined whether a prerequisite for diagnosing a battery state is satisfied, rather than directly diagnosing the battery state based on battery information. Therefore, the device 100 for diagnosing a battery has the advantage of more accurately diagnosing a battery state corresponding to the diagnosis content because it takes more consideration of whether the prerequisite is satisfied.

[0074] In addition, the precondition judgment unit 110 and the state diagnosis unit 120 included in the device 100 for diagnosing a battery may optionally include a processor, an application-specific integrated circuit (ASIC), other chipsets, logic circuits, registers, communication modems, data processing devices, etc., which are known in the art to execute various control logics executed in the present disclosure. In addition, when the control logic is implemented as software, the precondition judgment unit 110 and the state diagnosis unit 120 may be implemented as a set of program modules. At this time, the program module may be stored in a memory and executed by the precondition judgment unit 110 and the state diagnosis unit 120. The memory may be located inside or outside the precondition judgment unit 110 and the state diagnosis unit 120, and may be connected to the precondition judgment unit 110 and the state diagnosis unit 120 by various well-known means.

[0075] Specifically, the state diagnosis unit 120 may be configured to diagnose the state of the battery by comparing the diagnosis content with the battery information corresponding to the diagnosis content when the prerequisite is satisfied.

[0076] For example, when there are a plurality of preconditions, the state diagnosis unit 120 may diagnose the state of the battery by comparing the battery information with the diagnosis content when all of the plurality of preconditions are satisfied.

[0077] Preferably, at least one prerequisite corresponding to the diagnosis content may be a prerequisite that must be satisfied first in order to diagnose the state of the battery according to the diagnosis content.

[0078] For example, if the prerequisite is not met, even if the battery status is diagnosed according to the diagnostic content, it cannot be confirmed that the diagnostic result accurately reflects the current status of the battery. Therefore, when the prerequisite is met, the status diagnosis unit 120 can diagnose the battery status by substituting the battery information into the diagnostic content.

[0079] In the previous embodiment, it is assumed that all the first to sixth prerequisites are satisfied, the diagnostic content is "whether the battery temperature is lower than -30°C", and the obtained battery information is -40°C. The state diagnosis unit 120 may substitute the battery information (-40°C) into the diagnostic content (whether the battery temperature is lower than -30°C), and determine that the battery information satisfies the diagnostic content. In addition, the state diagnosis unit 120 may diagnose the state of the battery as an abnormal state.

[0080] In this embodiment, because the diagnostic content is "Is the battery temperature lower than -30°C", the battery information satisfies the diagnostic content, but the battery state can be diagnosed as abnormal. On the other hand, if the diagnostic content is "Is the battery temperature -30°C or higher", the battery state can be diagnosed as abnormal because the battery information does not satisfy the diagnostic content. In other words, whether the diagnostic content is satisfied and the state of the diagnosed battery can vary depending on the diagnostic content.

[0081] The apparatus 100 for diagnosing a battery according to an embodiment of the present disclosure has advantages that a diagnosis result is accurate and highly reliable because it diagnoses the state of the battery when all prerequisites are satisfied.

[0082] Furthermore, when the prerequisite is not satisfied, the state diagnosis unit 120 may be configured to assume that the prerequisite is satisfied, and diagnose the expected state of the battery by comparing battery information corresponding to the diagnosis content with the diagnosis content.

[0083] For example, when a plurality of prerequisites exist, the state diagnosis unit 120 may be configured to diagnose the expected state of the battery if any one of the plurality of prerequisites is not satisfied.

[0084] Here, the expected state of the battery may be temporary state information about the battery diagnosed based on the obtained battery information and the diagnosis content. In other words, the expected state of the battery may be state information of the battery that can be diagnosed only when the prerequisite is not met. Because the prerequisite is not met, the accuracy of the diagnosis result may be low compared to the previous battery state.

[0085] However, if the prerequisites of the battery are strictly considered, the problem of not diagnosing the battery state due to not meeting the prerequisites may occur. Therefore, the state diagnosis unit 120 can diagnose the state of the battery as normal when the prerequisites are met, and can temporarily diagnose the state of the battery even when the prerequisites are not met.

[0086] For example, suppose that the first through sixth prerequisites are the same as Figure 4 The prerequisites are the same as those in the embodiment, and the prerequisites obtained by the prerequisite judgment unit 110 are as follows.

[0087] 1) Auxiliary battery voltage: 7V

[0088] 2) Value of CAN signal "X": 2

[0089] 3) Is DTC "AA" set?

[0090] 4) Is DTC "BB" set: Not set

[0091] 5) Is DTC "CC" set: Not set

[0092] Reference Figure 4 , since the voltage of the auxiliary battery is 7V, the first prerequisite and the second prerequisite can be met. However, since the value of the CAN signal "X" is 2, the third prerequisite cannot be met. In addition, since the DTC "AA" is set, the fourth prerequisite cannot be met. Since both DCT "BB" and "CC" are not set, the fifth prerequisite and the sixth prerequisite can be met. Therefore, the prerequisite judgment unit 110 can judge that the third prerequisite and the fourth prerequisite among the first prerequisite to the sixth prerequisite corresponding to the diagnostic content are not met. Because the third prerequisite and the fourth prerequisite are not met, the status diagnosis unit 120 cannot diagnose the status of the battery. However, the status diagnosis unit 120 assumes that the third prerequisite and the fourth prerequisite are met, and the expected status of the battery can be diagnosed by substituting the battery information into the diagnostic content.

[0093] In other words, when all the prerequisites are met, the device 100 for diagnosing a battery according to an embodiment of the present disclosure can diagnose the state of the battery based on the battery information. In addition, the device 100 for diagnosing a battery can diagnose the expected state of the battery assuming that all the prerequisites are met, so as to solve the problem of not diagnosing the battery state due to not meeting certain prerequisites. However, even if the expected state of the battery is diagnosed, the same follow-up measures as when diagnosing the battery state cannot be taken because the prerequisites are not met.

[0094] Reference Figure 1 The device 100 for diagnosing a battery may further include a storage unit 130 .

[0095] The storage unit 130 may be configured to store at least one diagnostic content of the battery state and at least one prerequisite corresponding to the diagnostic content.

[0096] Here, the storage unit 130 may store data necessary for the operation and function of each component of the apparatus 100 for diagnosing a battery, data generated in the process of performing an operation or function, and the like. The type of the storage unit 130 is not particularly limited as long as it is a known information storage device that can record, erase, update, and read data. As an example, the information storage device may include a RAM, a flash memory, a ROM, an EEPROM, a register, and the like. In addition, the storage unit 130 may store a program code in which a process that can be performed by each component of the apparatus 100 for diagnosing a battery is defined.

[0097] Specifically, the storage unit 130 may pre-store at least one prerequisite corresponding to the diagnosis content in the form of a prerequisite list. Preferably, the storage unit 130 may pre-store the prerequisite corresponding to the diagnosis target factor among the diagnosis content in the form of a prerequisite list. Figure 3 and Figure 4 A list of prerequisites for embodiments of the present invention may be pre-stored in the storage unit 130 .

[0098] The state diagnosis unit 120 may be configured to store a diagnosis result of the battery, a diagnosis type indicating the battery state, and whether a prerequisite is satisfied in the storage unit 130 .

[0099] Specifically, the state diagnosis unit 120 may map and store the diagnosis result, the satisfaction of the prerequisite, and the diagnosis type in the storage unit 130 .

[0100] Here, the diagnosis result is related to the diagnosis state of the battery and may indicate normal or abnormal. The diagnosis type is related to the diagnosis content and may indicate the state of the battery or the expected state of the battery. In other words, the diagnosis type may indicate whether the result diagnosed by the state diagnosis unit 120 is related to the state of the battery or the expected state of the battery. Prerequisite satisfaction refers to whether at least one prerequisite corresponding to the diagnosis content is satisfied, and may indicate satisfaction or non-satisfaction.

[0101] According to an embodiment of the present disclosure, since the diagnosis result, the diagnosis type, and whether the prerequisite is satisfied are mapped and stored with respect to the diagnosis content, there is an advantage in that the overall diagnosis status can be easily checked.

[0102] The state diagnosis unit 120 may be configured to determine a DTC flag indicating a diagnosis result of the battery, a diagnosis type flag indicating a diagnosis type, and a prerequisite flag indicating whether a prerequisite is satisfied.

[0103] Specifically, the status diagnosis unit 120 may be configured to map the DTC flag, the diagnosis type flag, and the prerequisite flag, and store them in the storage unit 130 .

[0104] Figure 5 is a diagram schematically illustrating mapping information stored in the apparatus 100 for diagnosing a battery according to an embodiment of the present disclosure.

[0105] exist Figure 5 In an embodiment of the present invention, the mapping information may include a DTC type, a DTC flag, a diagnostic type flag, and a prerequisite flag.

[0106] The DTC type is a value related to the type of the DTC, and a preset value related to the type of the DTC to be diagnosed may be recorded.

[0107] The DTC flag is a value related to the diagnosis result, and can record whether the battery state is normal or abnormal. For example, if the battery state is normal, "0" can be recorded, and if the battery state is abnormal, "1" can be recorded.

[0108] The diagnosis type flag is a value related to the diagnosis type, and can record whether the diagnosis result of the state diagnosis unit 120 is the state of the battery or the expected state of the battery. For example, if the diagnosis result is related to the state of the battery, "0" can be recorded, and if the diagnosis result is related to the expected state of the battery, "1" can be recorded.

[0109] The prerequisite flag is related to whether at least one prerequisite corresponding to the diagnosis content is satisfied, and can record whether each prerequisite is satisfied. For example, if the prerequisite is satisfied, "0" can be recorded, and if the prerequisite is not satisfied, "1" can be recorded.

[0110] When there are a plurality of prerequisites, the state diagnosis unit 120 may be configured to determine a prerequisite flag for each of the plurality of prerequisites.

[0111] Figure 6 is a diagram showing an example of mapping information according to an embodiment of the present disclosure. Figure 6 In an embodiment of the present invention, diagnosis related to DTC A, DTC B and DTC C may have been performed.

[0112] First, mapping information related to DTC A may be stored in record 601. Since the DCT flag is "0", it can be seen that the battery has been diagnosed as being in a normal state. Since the diagnosis type flag is "0", it can be seen that the state of the battery has been diagnosed. Since the prerequisite flag is "0", it can be seen that at least one prerequisite corresponding to DTC A is fully satisfied at the time of diagnosis.

[0113] Next, mapping information related to DTC B may be stored in record 602. Since the DCT flag is "1", it can be seen that the battery has been diagnosed as being in an abnormal state. Since the diagnosis type flag is "0", it can be seen that the state of the battery has been diagnosed. Since the prerequisite flag is "0", it can be seen that at least one prerequisite corresponding to DTC B is fully satisfied at the time of diagnosis.

[0114] Finally, mapping information related to DTC C may be stored in record 603. Since the DCT flag is "1", it can be seen that the battery has been diagnosed as being in an abnormal state. Since the diagnosis type flag is "1", it can be seen that the battery has been diagnosed as being in an expected state. The first to sixth prerequisites may be Figure 4The prerequisites shown in . The prerequisite flags of the first prerequisite, the second prerequisite, the fifth prerequisite, and the sixth prerequisite are "0", so it can be seen that the corresponding prerequisites have been met. However, since the prerequisite flags of the third prerequisite and the fourth prerequisite are "1", it can be seen that the corresponding prerequisites are not met. Therefore, the diagnostic type flag of DTC C can be "1".

[0115] The apparatus 100 for diagnosing a battery has the following advantages: by storing specific mapping information related to the battery status diagnosis result, details related to the battery status diagnosis result can be easily checked. In other words, if a prerequisite is not met, which prerequisite is not met can be easily confirmed through the mapping information at the time of diagnosis.

[0116] The device 100 for diagnosing a battery according to the present disclosure may be applied to a battery management system (BMS). That is, the BMS according to the present disclosure may include the above-mentioned device 100 for diagnosing a battery. In this configuration, at least some components of the device 100 for diagnosing a battery may be implemented by supplementing or adding functions of components included in a conventional BMS. For example, the prerequisite judgment unit 110, the state diagnosis unit 120, and the storage unit 130 of the device 100 for diagnosing a battery may be implemented as components of the BMS.

[0117] Figure 7 is a diagram schematically showing an exemplary configuration of a battery pack according to another embodiment of the present disclosure.

[0118] In addition, the device 100 for diagnosing a battery according to the present disclosure may be provided in the battery pack 10. That is, the battery pack 10 according to the present disclosure may include the above-mentioned device 100 for diagnosing a battery and at least one battery cell. In addition, the battery pack 10 may further include electrical components (relays, fuses, etc.) and a housing.

[0119] Figure 7 is a diagram illustrating an exemplary configuration of a battery pack 10 including an apparatus 100 for diagnosing a battery according to an embodiment of the present disclosure.

[0120] The positive terminal of the battery 11 may be connected to the positive terminal P+ of the battery pack 10 , and the negative terminal of the battery 11 may be connected to the negative terminal P− of the battery pack 10 .

[0121] The measuring unit 12 may be connected to the first sensing line SL1, the second sensing line SL2, and the third sensing line SL3. Specifically, the measuring unit 12 may be connected to the positive terminal of the battery 11 through the first sensing line SL1, and may be connected to the negative terminal of the battery 11 through the second sensing line SL2. The measuring unit 12 may measure the voltage of the battery 11 based on the voltage measured at each of the first sensing line SL1 and the second sensing line SL2.

[0122] In addition, the measuring unit 12 may be connected to the current measuring unit A through the third sensing line SL3. For example, the current measuring unit A may be an ammeter or a shunt resistor that can measure the charging current and the discharging current of the battery 11. The measuring unit 12 may calculate the charging amount by measuring the charging current of the battery 11 through the third sensing line SL3. In addition, the measuring unit 12 may calculate the discharging amount by measuring the discharging current of the battery 11 using the third sensing line SL3.

[0123] The measuring unit 12 is connected to the apparatus 100 for diagnosing a battery, and the battery information measured by the measuring unit 12 may be stored in the storage unit 130. In addition, the battery information measured by the measuring unit 12 may be used in a process of diagnosing the state of the battery in the state diagnosis unit 120.

[0124] The positive terminal P+ and the negative terminal P− of the battery pack 10 may be connected to a load or a charging device.

[0125] Figure 8 2 is a diagram schematically showing a vehicle 1 according to still another embodiment of the present disclosure.

[0126] Reference Figure 8 The battery pack 10 according to the embodiment of the present disclosure may be included in a vehicle 1 such as an electric vehicle (EV) or a hybrid vehicle (HV). In addition, the battery pack 10 may drive the vehicle 1 by supplying power to a motor through an inverter included in the vehicle 1.

[0127] Preferably, the apparatus 100 for diagnosing a battery may be included in the battery pack 10 , and the battery pack 10 may be included in the vehicle 1 .

[0128] Fig. 9 is a diagram schematically illustrating a method for diagnosing a battery according to another embodiment of the present disclosure.

[0129] Each step of the method for diagnosing a battery may be performed by the apparatus for diagnosing a battery 100. Hereinafter, for convenience of explanation, it should be noted that contents repeated with previously described contents will be briefly described or omitted.

[0130] Reference Fig. 9, the method for diagnosing a battery may include a prerequisite determining step (S100), a prerequisite information obtaining step (S200), a prerequisite satisfaction determining step (S300), a battery information obtaining step (S400) and a battery status diagnosing step (S500).

[0131] The prerequisite determination step ( S100 ) is a step of determining a prerequisite that is preset to correspond to the diagnosis content of the battery, and may be performed by the prerequisite judgment unit 110 .

[0132] For example, the prerequisite determination unit 110 may be configured to determine a prerequisite preset to correspond to the diagnosis content of the battery. For example, the prerequisite determination unit 110 may determine at least one prerequisite corresponding to the diagnosis content by referring to a list of pre-stored prerequisites.

[0133] The prerequisite information obtaining step ( S200 ) is a step of obtaining prerequisite information corresponding to the prerequisite from the external device 200 , and may be performed by the prerequisite judgment unit 110 .

[0134] For example, the prerequisite determination unit 110 may obtain prerequisite information from the external device 200 to verify the determined prerequisite.

[0135] The prerequisite satisfaction determination step ( S300 ) is a step of determining whether the prerequisite is satisfied based on the obtained prerequisite information, and may be performed by the prerequisite judgment unit 110 .

[0136] For example, specifically, the prerequisite determination unit 110 may determine whether the prerequisite corresponding to the diagnosis content is satisfied by substituting the obtained prerequisite information into the corresponding prerequisite.

[0137] The battery information obtaining step ( S400 ) is a step of obtaining battery information corresponding to the diagnosis content, and may be performed by the state diagnosis unit 120 .

[0138] For example, the state diagnosis unit 120 may be configured to obtain battery information corresponding to the diagnosis content. Preferably, the state diagnosis unit 120 may obtain information related to the diagnosis target factor included in the diagnosis content.

[0139] The battery state diagnosis step ( S500 ) is a step of diagnosing the state of the battery based on the diagnosis content and the battery information according to whether the prerequisite is satisfied, and may be performed by the state diagnosis unit 120 .

[0140] For example, the status diagnosis unit 120 may diagnose the status of the battery by substituting the obtained battery information into the diagnosis content.

[0141] The embodiments of the present disclosure described above can be implemented not only by devices and methods, but also by programs that implement functions corresponding to the configurations of the embodiments of the present disclosure or recording media on which the programs are recorded. Based on the above description of the embodiments, those skilled in the art can easily implement the programs or recording media.

[0142] The present disclosure has been described in detail. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the present disclosure, are given by way of illustration only, since various changes and modifications within the scope of the present disclosure will be apparent to those skilled in the art from the detailed description.

[0143] In addition, those skilled in the art may make many substitutions, modifications and changes to the disclosure described above without departing from the technical aspects of the disclosure, and the disclosure is not limited to the above-mentioned embodiments and drawings, and the various embodiments may be selectively combined in part or in whole to allow various modifications.

[0144] (Explanation of Reference Numerals)

[0145] 1: Vehicle

[0146] 10: Battery Pack

[0147] 11: Battery

[0148] 12: Measurement unit

[0149] 100: Device for diagnosing batteries

[0150] 110: Prerequisite judgment unit

[0151] 120: Status diagnostic unit

[0152] 130: Storage unit

Claims

1. A device for diagnosing a battery, the device comprising: a prerequisite determination unit configured to determine a prerequisite that is preset to correspond to the diagnosis content of the battery, obtain prerequisite information corresponding to the prerequisite from an external device, and determine whether the prerequisite is satisfied based on the obtained prerequisite information; as well as A state diagnosis unit is configured to obtain battery information corresponding to the diagnosis content and diagnose the state of the battery based on the diagnosis content and the battery information according to whether the prerequisite is satisfied.

2. The device for diagnosing a battery according to claim 1, in, When the prerequisite is satisfied, the state diagnosis unit is configured to diagnose the state of the battery by comparing the battery information corresponding to the diagnosis content with the diagnosis content.

3. The device for diagnosing a battery according to claim 1, in, When the prerequisite is not satisfied, the state diagnosis unit is configured to assume that the prerequisite is satisfied, and diagnose the expected state of the battery by comparing battery information corresponding to the diagnosis content with the diagnosis content.

4. The device for diagnosing a battery according to claim 3, in, When there are a plurality of the prerequisites, the state diagnosis unit is configured to diagnose the expected state of the battery if any one of the plurality of prerequisites is not satisfied.

5. The device for diagnosing a battery according to claim 1, further comprising: A storage unit is configured to store at least one diagnostic content of the battery status and at least one prerequisite corresponding to the diagnostic content.

6. The device for diagnosing a battery according to claim 5, in, The state diagnosis unit is configured to store a diagnosis result of the battery, a diagnosis type indicating a state of the battery, and whether the prerequisite is satisfied in the storage unit.

7. The device for diagnosing a battery according to claim 6, in, The status diagnosis unit is configured to determine a DTC flag indicating a diagnosis result of the battery, a diagnosis type flag indicating the diagnosis type, and a prerequisite flag indicating whether the prerequisite is satisfied, and map and store the DTC flag, the diagnosis type flag, and the prerequisite flag in the storage unit.

8. The device for diagnosing a battery according to claim 7, wherein: When there are multiple prerequisites, the status diagnosis unit is configured to determine a prerequisite flag for each of the multiple prerequisites.

9. A battery pack comprising the device for diagnosing a battery according to any one of claims 1 to 8.

10. A vehicle comprising the device for diagnosing a battery according to any one of claims 1 to 8.

11. A method for diagnosing a battery, the method comprising the following steps: a prerequisite determination step of determining a prerequisite preset to correspond to the diagnosis content of the battery; a prerequisite information obtaining step of obtaining prerequisite information corresponding to the prerequisite from an external device; a prerequisite satisfaction determination step of determining whether the prerequisite is satisfied based on the obtained prerequisite information; a battery information obtaining step, wherein the battery information obtaining step obtains battery information corresponding to the diagnosis content; as well as A battery status diagnosis step of diagnosing the battery status based on the diagnosis content and the battery information according to whether the prerequisite is satisfied.

Images