KR20240067807A - Apparatus and method for diagnosis of battery performance - Google Patents

Abstract

A battery performance diagnostic device according to an embodiment disclosed in this document includes a diagnostic module; When a battery is inserted into a first channel among a plurality of channels of the charger/discharger, a diagnostic control unit that generates a generation command instructing generation of a first channel diagnostic module for the first channel based on the diagnostic module; and an interface module that copies the diagnostic module and loads the first channel diagnostic module based on the creation command, wherein the first channel diagnostic module is configured to, through the interface module, use the charger/discharger to An information acquisition module that acquires measurement information about the battery in real time while the battery is charging or discharging; A diagnostic function execution module configured to diagnose the performance of the battery by executing at least one of one or more diagnostic functions based on the measurement information and obtain a diagnostic result for the at least one diagnostic function; and a return module that returns the diagnosis result to the diagnosis control unit through the interface module, wherein the diagnosis control unit stores the diagnosis result, and when charging or discharging the battery is completed, the first channel You can create a shutdown command that directs the shutdown of the diagnostic module.

Description

Apparatus and method for diagnosing battery performance {APPARATUS AND METHOD FOR DIAGNOSIS OF BATTERY PERFORMANCE}

Embodiments disclosed in this document relate to an apparatus and method for diagnosing battery performance.

Recently, research and development on secondary batteries has been actively conducted. Here, the secondary battery is a battery capable of charging and discharging, and includes both conventional Ni/Cd batteries, Ni/MH batteries, etc., and recent lithium ion batteries. Among secondary batteries, lithium-ion batteries have the advantage of having much higher energy density than conventional Ni/Cd batteries, Ni/MH batteries, etc. In addition, lithium-ion batteries can be made small and lightweight, so they are used as a power source for mobile devices. Recently, their range of use has expanded to a power source for electric vehicles, and they are attracting attention as a next-generation energy storage medium.

As the industrial field utilizing batteries expands, battery management systems (BMS) that diagnose the safety of batteries are also developing. The battery management system is a system that diagnoses battery performance. It diagnoses battery performance such as overvoltage, battery cell failure, temperature sensor failure, and disconnection based on measurement information such as battery voltage, current, and temperature measured by the charger and discharger. can do.

As battery performance improves with developments in the battery industry, various diagnostic algorithms are being created.

However, there is a problem that a separate infrastructure is required to execute the newly created diagnostic algorithm. As various diagnostic algorithms are being developed to diagnose battery performance, there is a need to secure a platform that can diagnose battery performance in conjunction with chargers and dischargers without building separate infrastructure.

In addition, in the case of a battery with poor performance, it may lead to battery explosion, so it is necessary to determine that it is a diagnostic result that may lead to explosion and automate control to temporarily stop or terminate the charging or discharging of the battery.

The technical problems of the embodiments disclosed in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below.

A battery performance diagnostic device according to an embodiment disclosed in this document includes a diagnostic module; When a battery is inserted into a first channel among a plurality of channels of the charger/discharger, a diagnostic control unit that generates a generation command instructing generation of a first channel diagnostic module for the first channel based on the diagnostic module; and an interface module that copies the diagnostic module and loads the first channel diagnostic module based on the creation command, wherein the first channel diagnostic module is configured to, through the interface module, use the charger/discharger to An information acquisition module that acquires measurement information about the battery in real time while the battery is charging or discharging; A diagnostic function execution module configured to diagnose the performance of the battery by executing at least one of one or more diagnostic functions based on the measurement information and obtain a diagnostic result for the at least one diagnostic function; and a return module that returns the diagnosis result to the diagnosis control unit through the interface module, wherein the diagnosis control unit stores the diagnosis result, and when charging or discharging the battery is completed, the first channel You can create a shutdown command that directs the shutdown of the diagnostic module.

In one embodiment, the battery performance diagnosis device may further include a transmission unit that transmits the diagnosis result to the administrator terminal.

In one embodiment, the battery performance diagnosis device is a charge/discharge device that controls the charger/discharger to pause or terminate charging or discharging of the battery when the diagnosis result indicates a specified abnormality for the battery or the charger/discharger. It may further include a control unit.

In one embodiment, when the charging or discharging is paused or terminated, the transmission unit may transmit a charging/discharging control result for the pause or termination to the manager terminal.

In one embodiment, the battery performance diagnosis device is loaded into memory by the interface module, based on the version check command generated by the diagnostic control unit, to determine the version of the diagnostic module and the version of the first channel diagnostic module. A version checking module that compares may be further included.

In one embodiment, the diagnostic function execution module is a first diagnostic function among the one or more diagnostic functions, and when the measured current of the battery does not decrease for more than a preset time in a constant voltage charging section of the battery, the diagnostic function execution module is a first diagnostic function among the one or more diagnostic functions. A diagnosis result of an abnormality or an abnormality of the charger/discharger may be generated.

In one embodiment, the first channel diagnostic module may further include a preprocessor that converts the measurement information into commands corresponding to each of the one or more diagnostic functions, and the diagnostic function execution module may be configured to perform the one or more diagnostic functions. Each of the functions can be executed based on the converted command.

A battery performance diagnosis method according to an embodiment disclosed in this document is based on a diagnostic module including one or more diagnostic functions when a battery is inserted into a first channel among a plurality of channels of a charger/discharger, and the first a diagnostic control operation that generates a generation command directing generation of a first channel diagnostic module for the channel; an interface operation of loading the first channel diagnosis module based on the creation command; and an operation of diagnosing the performance of the battery based on the first channel diagnosis module, wherein the operation of diagnosing the performance of the battery includes: while the battery is being charged or discharged using the charger/discharger, An information acquisition operation that acquires measurement information in real time; A diagnostic function execution operation of diagnosing the battery by executing at least one diagnostic function among the one or more diagnostic functions based on the measurement information; Obtaining a diagnosis result for at least one of the diagnostic functions; and storing the diagnosis result. When charging or discharging the battery is completed, a shutdown command may be generated to instruct termination of the first channel diagnostic module.

In one embodiment, the battery performance diagnosis method may further include transmitting the diagnosis result to an administrator terminal.

In one embodiment, the battery performance diagnosis method includes a charge/discharge control operation that performs control to temporarily stop or terminate charging or discharging of the battery when the diagnosis result indicates a specified abnormality for the battery or the charger/discharger. More may be included.

In one embodiment, the battery performance diagnosis method includes, when the charging or discharging is paused or terminated, the transmitting operation further includes transmitting a charging and discharging control result for the pause or termination to the administrator terminal. can do.

In one embodiment, the method for diagnosing battery performance includes generating a version check command; Loading a version check module into memory based on the version check command; and comparing versions of the diagnostic module and the first channel diagnostic module using the version confirmation module.

In one embodiment, the diagnostic function execution operation is a first diagnostic function among the one or more diagnostic functions, and when the measured current of the battery does not decrease for more than a preset time in a constant voltage charging section of the battery, the diagnostic function execution operation is a first diagnostic function among the one or more diagnostic functions. It may include an operation of generating a diagnosis result of an abnormality or an abnormality of the charger/discharger.

In one embodiment, the battery performance diagnosis method may further include a preprocessing operation of converting the measurement information into a command corresponding to each of the one or more diagnostic functions, and the diagnostic function execution operation may include the one or more diagnostic functions. Each of them can be executed based on the converted command.

The battery performance diagnosis device according to an embodiment of the present disclosure can generate various diagnostic results in real time without building a separate infrastructure by linking at least one diagnostic DLL file using a diagnostic DLL (Dynamic Linking Library) file. .

The battery performance diagnosis device according to an embodiment of the present disclosure temporarily suspends or terminates charging or discharging of the battery when the diagnosis result for an abnormality in the battery and/or an abnormality in the charger/discharger is a specified abnormality, thereby preventing battery explosion. It can automatically block potentially dangerous situations.

The effects of the battery performance diagnosis device according to the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art according to the disclosure of this document.

1A and 1B schematically illustrate a battery performance diagnosis system according to various embodiments disclosed in this document.
Figure 2 is a block diagram of a battery performance diagnosis device according to an embodiment disclosed in this document.
3 is a graph showing voltage and current over time of a battery according to an embodiment disclosed in this document.
FIG. 4A is an exemplary diagram illustrating a battery including a shorted battery cell according to an embodiment disclosed in this document.
FIG. 4B shows a graph showing diagnostic results according to an embodiment disclosed in this document.
Figure 5A is a flowchart of a battery performance diagnosis method according to an embodiment disclosed in this document.
5B is a flowchart of a method for executing a diagnostic function according to an embodiment disclosed in this document.
Figure 5C is a flowchart of a method for executing a diagnostic function according to an embodiment disclosed in this document.
5D is a flowchart of a method for executing a diagnostic function according to an embodiment disclosed in this document.
In relation to the description of the drawings, identical or similar reference numerals may be used for identical or similar components.

BRIEF DESCRIPTION OF THE DRAWINGS Various embodiments of the present invention are described below with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, but should be understood to include various modifications, equivalents, and/or alternatives to the embodiments of the present invention.

The various embodiments of this document and the terms used herein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various changes, equivalents, or replacements of the embodiments. In connection with the description of the drawings, similar reference numbers may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the above items, unless the relevant context clearly indicates otherwise.

As used herein, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. Terms such as "first", "second", "first", "second", "A", "B", "(a)" or "(b)" simply refer to the element in question. It can be used to distinguish between and, unless specifically stated to the contrary, does not limit the components in other respects (e.g., importance or order).

As used herein, the terms "connect", "couple" or "join" one (e.g. first) component to another (e.g. second) component, with or without the terms "functionally" or "communicatively". When reference is made to being "connected" or "coupled" or "connected," it means that any of the components is directly (e.g. wired), wirelessly, or connected to another component. This means that it can be connected through.

According to one embodiment, methods according to various embodiments disclosed in this document may be included and provided in a computer program product. Computer program products are commodities and can be traded between sellers and buyers. A computer program product may be distributed on a machine-readable storage medium (e.g. compact disc read only memory (CD-ROM)) or distributed online, directly through an application store or between two user devices (e.g. : can be downloaded or uploaded). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

According to various embodiments, each component (e.g., module or program) of the above-described components may include a single or plural entity, and some of the plurality of entities may be separately placed in other components. there is. According to various embodiments, one or more of the components or operations described above may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (eg, modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component of the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, or omitted. Alternatively, one or more other operations may be added.

1A and 1B schematically show a battery performance diagnosis system 50 according to various embodiments disclosed in this document.

Referring to FIG. 1A , the battery performance diagnosis system 50 may include a charger/discharger 10, a battery performance diagnosis device 20, an administrator terminal 30, and a battery 40.

The charger/discharger 10 may include n channels 13, 15, and 17. A battery 40 may be inserted into each of the n channels 13, 15, and 17. Here, the charger/discharger 10 may be a device capable of performing a charging function and/or a discharging function. Meanwhile, depending on the embodiment, the above-described charger/discharger 10 may be replaced with a charger that performs a charging function or may be replaced with a discharger that performs a discharging function. The n channels 13, 15, and 17 may include a slot into which the battery 40 is inserted, and a wire connecting the slot and the charger/discharger 10. Here, n is an integer of 2 or more. The n channels 13, 15, and 17 may also be referred to as a plurality of channels 13, 15, and 17 below.

The battery 40 is a rechargeable secondary battery. The battery 40 may include a battery pack. Here, the battery pack may include one or more battery modules. And, each of the battery modules may include one or more battery cells. A battery cell may include an anode, a cathode, a separator, an electrolyte, or a combination thereof. A battery cell is the basic unit of the battery 40 that can be used by charging or discharging electrical energy.

The battery performance diagnosis device 20 may include a control unit 21, an interface module 210, a diagnostic module 220, a version check module 230, a transmission unit 260, a memory 270, or a combination thereof. there is. Here, at least one of the interface module 210, the diagnosis module 220, or the version check module 230 may be implemented as software.

The control unit 21 may include a diagnostic control unit 200 and a charge/discharge control unit 250.

The diagnostic control unit 200 can create, check the version, execute, terminate, and remove the channel diagnostic module by sending a command to the interface module 210. Below, with reference to the drawings, the creation, version confirmation, execution, termination, and removal operations of the channel diagnosis module will be described.

Creation of a channel diagnostic module

The diagnostic control unit 200 may load the interface module 210 into the memory 270 .

The diagnosis control unit 200 may generate a creation command (eg, CreateDIAGcell()) that instructs the creation of a channel diagnosis module. The diagnosis control unit 200 may generate a generation command instructing the generation of a channel diagnosis module based on a signal from the charger/discharger 10 (e.g., a signal for detecting whether the battery 40 is inserted).

The diagnostic control unit 200 may generate a creation command instructing the creation of a channel diagnostic module corresponding to a channel into which the battery 40 is inserted among the plurality of channels 13, 15, and 17. For example, when the battery 40 is inserted into the first channel 13 among the plurality of channels 13, 15, and 17 of the charger/discharger 10, the diagnostic control unit 200 detects the first channel 13. A creation command instructing the creation of the first channel diagnosis module 230 is generated. In addition, for example, when the battery 40 is inserted into each of the first channel 13 to the nth channel 17, the diagnostic control unit 200 operates the first channel diagnostic module 230 to the nth diagnostic module ( A creation command that instructs the creation of (not shown) can be created. Hereinafter, the battery performance diagnosis device 20 will be described assuming that the battery 40 is inserted into the first channel 13.

The diagnostic control unit 200 may transmit a creation command instructing the creation of the first channel diagnostic module 230 to the interface module 210.

The interface module 210 may generate the first channel diagnosis module 230. The interface module 210 may load the first channel diagnosis module 230 based on the creation command. The interface module 210 may generate the first channel diagnosis module 230 based on a creation command instructing the creation of the first channel diagnosis module 230. When the interface module 210 receives a creation command instructing creation of the first channel diagnosis module 230, it may generate the first channel diagnosis module 230. Here, the first channel diagnosis module 230 may be implemented as software.

The interface module 210 may generate the first channel diagnosis module 230 based on the diagnosis module 220. The interface module 210 may load the first channel diagnosis module 230 based on the diagnosis module 220. For example, the interface module 210 may copy the diagnosis module 220 to create the first channel diagnosis module 230. Here, the diagnostic module 220 may include an information acquisition module 222, a preprocessing module 224, a diagnostic function execution module 226, a return module 228, or a combination thereof.

The interface module 210 may transmit a response to a creation command instructing creation of a channel diagnosis module to the diagnosis control unit 200. Here, the response may indicate the generation result of the first channel diagnosis module 230.

In one embodiment, the diagnostic control unit 200 may determine the operation to be performed next based on the response to the generation command. For example, if the response to the creation command indicates success, the diagnosis control unit 200 may perform a channel diagnosis module version check. For example, if the response to the creation command indicates a file copy failure, the diagnosis control unit 200 may terminate the diagnosis of the battery 40 inserted into the first channel 13. Additionally, when the response to the creation command indicates a file copy failure, the diagnostic control unit 200 may store the error code indicated by the response to the creation command.

Check the version of the channel diagnostic module

The diagnostic control unit 200 may generate a version check command (Init()) (generation condition: generated based on the return of CreateDIAGcell).

The interface module 210 may load the version check module 240 into the memory 270 . The interface module 210 may load the version check module 240 into the memory 270 based on the version check command. When the interface module 210 receives a version check command from the diagnostic control unit 200, the interface module 210 may load the version check module 240 into the memory 270.

The interface module 210 may convert the version check command (Init()) into a version check command (CheckVersion()) and then transmit it to the version check module 230.

The version check module 240 may compare the version of the diagnosis module 220 with the version of the first channel diagnosis module 230. When the version check module 240 receives a version check command (CheckVersion()) from the interface module 210, the version of the diagnostic module 220 and the version of the first channel diagnostic module 230 may be compared.

If the versions of the diagnostic module 220 and the first channel diagnostic module 230 are different, the version check module 240 may copy the diagnostic module 220 and replace the first channel diagnostic module 230. .

The version confirmation module 240 may transmit the confirmation result to the diagnosis control unit 200. The version confirmation module 240 may transmit the confirmation result to the diagnostic control unit 200 through the interface module 210.

The diagnostic control unit 200 may receive the confirmation result. The diagnostic control unit 200 may receive the confirmation result through the interface module 210.

In one embodiment, the diagnostic control unit 200 may determine the next operation to be performed based on the confirmation result. For example, if the verification result indicates success, the diagnosis control unit 200 may execute the channel diagnosis module. For example, if the verification result indicates a file copy failure, the diagnosis control unit 200 may end diagnosis of the battery 40 inserted into the first channel 13. Additionally, if the verification result indicates a file copy failure, the diagnostic control unit 200 may store the error code indicated in the response to the creation command.

Depending on the embodiment, the channel diagnosis module version checking operation may be omitted. In this case, the diagnosis control unit 200 may create a channel diagnosis module and then execute the channel diagnosis module.

Running the Channel Diagnostic Module

The diagnostic control unit 200 may generate an execution command (Run()) that instructs execution of the first channel diagnostic module 230. The diagnostic control unit 200 may generate an execution command (Run()) based on measurement information about the battery 40. Here, the measurement information may include measurement signals and/or state values. The measurement signal may include voltage, current, and/or temperature, and the state value may include state of health (SoH) and/or state of charge (SoC). For example, the diagnostic control unit 200 may generate an execution command (Run()) when measurement information about the battery 40 is obtained from the charger/discharger 10. Here, the execution command (Run()) may be repeatedly generated during charging and discharging of the battery 40. For example, an execution command (Run()) may be generated each time measurement information about the battery 40 is obtained from the charger/discharger 10.

The diagnostic control unit 200 generates an execution command (Run()) instructing execution of the first channel diagnostic module 230 (generation condition: generated based on the return of Init(), or upon the return of CreateDIAGcell(). It can be created based on The diagnosis control unit 200 determines the first channel diagnosis module 230 based on the confirmation result from the version confirmation module 240 (e.g., a signal that the versions of the diagnosis module 220 and the first channel diagnosis module 230 are the same). ), you can create an execution command that directs the execution of . Here, the first channel diagnostic module 230 may be a copy of the diagnostic module 220. Here, the diagnostic module 220 may include an information acquisition module 222, a preprocessing module 224, a diagnostic function execution module 226, a return module 228, or a combination thereof. Likewise, the first channel diagnostic module 230 may include an information acquisition module 222, a preprocessing module 224, a diagnostic function execution module 226, a return module 228, or a combination thereof.

The diagnostic control unit 200 may transmit the generated execution command (Run()) to the interface module 210.

The interface module 210 may convert an execution command (Run()) into a diagnostic execution command (RunDiag()). The interface module 210 may transmit the converted diagnostic execution command (RunDiag()) to the first channel diagnostic module 230.

The first channel diagnosis module 230 can diagnose the performance of the battery 40. The first channel diagnostic module 230 may diagnose the performance of the battery 40 by executing at least one of one or more diagnostic functions based on a diagnostic execution command (RunDiag()). When the first channel diagnostic module 230 receives a diagnostic execution command (RunDiag()) from the interface module 210, it may execute at least one diagnostic function among one or more diagnostic functions. Here, the diagnostic execution command (RunDiag()) may include measurement information about the battery 40. Here, one or more diagnostic functions may be described in more detail with reference to FIG. 2 below.

Specifically, the first channel diagnostic module 230 may obtain measurement information about the battery 40 through a diagnostic execution command (RunDiag()). The first channel diagnostic module 230 executes a command (e.g., DiagSMAVD(), DiagCE(), DIagCaSD(), DiagAIVE()) corresponding to each of one or more diagnostic functions based on a diagnostic execution command (RunDiag()). By generating and/or converting , the performance of the battery 40 can be diagnosed.

The first channel diagnostic module 230 may obtain a diagnosis result regarding the performance of the battery 40 according to each of the one or more diagnostic functions through a command corresponding to each of the one or more diagnostic functions.

The first channel diagnosis module 230 may return the diagnosis result to the diagnosis control unit 200. The first channel diagnosis module 230 may return the diagnosis result to the diagnosis control unit 200 through the interface module 210.

The diagnosis control unit 200 may perform certain operations based on the diagnosis result. For example, the diagnosis control unit 200 may store diagnosis results. For another example, the diagnosis control unit 200 may transmit the diagnosis result to the charge/discharge control unit 250 and/or the transmission unit 260.

The charge/discharge control unit 250 may perform designated operations based on the diagnosis results. For example, the charge/discharge control unit 250 may determine whether the diagnosis result indicates a specified abnormality. Here, the designated abnormality refers to an abnormality with a high risk among one or more abnormalities of the battery 40 and the charger/discharger 10. For example, the specified abnormality may be an abnormality that may lead to explosion of the battery 40. Additionally, the charge/discharge control unit 250 may perform charge/discharge control to temporarily stop or terminate charging or discharging of the battery 40 when the diagnosis result indicates a specified abnormality. And, the charge/discharge control unit 250 may transmit the charge/discharge control result to the transmitter 260 and/or the manager terminal 30.

Next, the transmission unit 260 may transmit the diagnosis result to the manager terminal 30.

Shutdown of Channel Diagnostic Module

The diagnostic control unit 200 may generate a termination command (Terminate()) that terminates execution of the first channel diagnostic module 230. The diagnostic control unit 200 may generate a termination command (Terminate()) that terminates execution of the first channel diagnostic module 230 when charging and discharging of the battery 40 ends.

The diagnostic control unit 200 may transmit a termination command (Terminate()) to the interface module 210.

The interface module 210 may terminate the first channel diagnosis module 230 based on a termination command (Terminate()).

The interface module 210 may generate a termination result (eg, a response to a termination command) indicating that the first channel diagnosis module 230 has been terminated. The interface module 210 may transmit the termination result to the diagnostic control unit 200.

Removal of Channel Diagnostic Module

The diagnostic control unit 200 may generate a delete command (DestroyDIAGcell()) to delete the first channel diagnostic module 230. The diagnostic control unit 200 may generate a delete command based on the end signal. The diagnostic control unit 200 may generate a delete command based on the termination result received from the interface module 210.

The diagnostic control unit 200 may transmit a delete command to the interface module 210.

The interface module 210 may unload and/or delete the first channel diagnosis module 230 based on the delete command. The interface module 210 may unload and/or delete the first channel diagnostic module 230 based on the delete command received from the diagnostic control unit 200.

Referring to FIG. 1B , an electric vehicle 100 including a battery performance diagnosis device 20 is illustrated. The electric vehicle 100 includes a battery pack 110 and an inverter 140, OBC (On Board Charger, 142), and LDC (Low voltage DC-DC Converter, 144) connected to the battery pack 110 as a power supply device. It can be included. Here, the inverter 140 is a device that converts direct current electrical energy supplied from the battery pack 110 into alternating current electrical energy, the OBC 142 is a device for charging the battery pack 110, and the LDC 144 is a device for charging the battery pack 110. It may be a device for converting high voltage to low voltage and supplying voltage to the load included in the electric vehicle 100.

The battery pack 110 may include battery units 111, 112, and 113 and a BMS 120. Here, each of the battery units 111, 112, and 113 may be a battery cell or battery module. In FIG. 1B, only three battery units (the first battery unit 111 to the nth battery unit 113) are shown, but the present invention is not limited thereto, and n may be a natural number of 1 or more.

The BMS 120 may include a battery performance diagnosis device 20. The battery performance diagnosis device 20 can diagnose abnormalities in each of the battery units 111, 112, and 113.

Operations performed in the battery performance diagnosis device 20 may not only be performed in the BMS 120 shown in FIG. 1B, but may also be performed in various devices such as a server, cloud, charger, or charger/discharger.

FIG. 2 is a block diagram of the diagnostic module 220 of the battery performance diagnostic device 20 according to an embodiment disclosed in this document. Descriptions of the diagnosis module 220 described with reference to FIG. 2 may also be applied to the first channel diagnosis module 230.

The diagnostic module 220 may include an information acquisition module 222, a preprocessing module 224, a diagnostic function execution module 226, a return module 228, or a combination thereof.

While the battery 40 is being charged or discharged using the charger/discharger 10, the information acquisition module 222 may acquire measurement information about the battery 40 in real time through the interface module 220. Here, the measurement information may include a measurement signal and/or state value. The measurement signal may include voltage, current, and/or temperature, and the state value may include state of health (SoH) and/or state of charge (SoC).

The preprocessing module 224 can convert the measurement information into instructions (e.g., DiagAICV(), DiagRoCV(), DiagSMAVD(), DiagCaSD(), DiagRdV(), DiafACAR()) corresponding to each of one or more diagnostic functions. there is. The diagnostic function execution module 226 may execute at least one diagnostic function based on the converted command. Here, the diagnostic function may be implemented through a library file (eg, Dynamic Link Library (DLL) file) containing diagnostic logic. A DLL file is a file that contains instructions that a program can call to perform a specific task.

The diagnostic function execution module 226 may diagnose the performance of the battery 40 by executing at least one diagnostic function among one or more diagnostic functions.

The diagnostic function execution module 226 performs one or more diagnostic functions such as abnormal I CV (AICV), rising of CV current (RoCV), single moving average voltage deviation (SMAVD), capacity sudden drop (CaSD), and relaxation deviation (RdV). voltage) and ACAR (accumulated capacity reduction) can be diagnosed.

In one embodiment, the diagnostic function execution module 226 may diagnose AICV through DiagAICV(). Here, AICV may represent a state of the battery 40 in which the current does not decrease for a preset time in the constant voltage (CV) charging section of the battery 40. Here, the preset time can be arbitrarily set by the setter. For example, the preset time may be 10 seconds.

In one embodiment, the diagnostic function execution module 226 may diagnose RoCV through DiagRoCV(). Here, RoCV may indicate a state in which at least one battery cell included in the battery 40 is short-circuited.

In one embodiment, the diagnostic function execution module 226 may diagnose SMAVD through DiagSMAVD(). Here, SMAVD may indicate that there is an abnormality in the voltage of the battery 40.

In one embodiment, the diagnostic function execution module 226 may diagnose CaSD through DiagCaSD(). Here, CaSD may indicate a breakage or disconnection inside the battery 40. For example, the diagnostic function execution module 226 may determine whether the battery 40 indicates CaSD based on a change in charging capacity each time charging of the battery 40 is completed.

In one embodiment, the diagnostic function execution module 226 may diagnose RdV through DiagRdV(). Here, RdV may indicate that there is a short-circuited cell among the cells of the battery 40. For example, the diagnostic function execution module 226 may determine whether at least one battery cell among cells of the battery exhibits RdV based on coulombic efficiency.

In one embodiment, the diagnostic function execution module 226 may diagnose ACAR through DiagACAR(). Here, ACAR may indicate that lithium precipitation or a micro-short circuit has occurred inside the battery 40. For example, the diagnostic function execution module 226 may determine whether the battery 40 exhibits ACAR based on the change in the charge/discharge capacity difference of the battery while performing a charge/discharge cycle for the battery 40. .

The diagnostic function execution module 226 may obtain a diagnostic result regarding the performance of the battery 40 based on at least one diagnostic function.

The diagnostic function execution module 226 may transmit the diagnostic result to the return module 228.

Return module 228 may receive diagnostic results. The return module 228 may receive a diagnosis result from the diagnosis function execution module 226.

The return module 228 may transmit the diagnosis result to the interface module 210.

The interface module 210 may transmit the diagnosis result to the diagnosis control unit 200.

The diagnosis control unit 200 may receive diagnosis results. The diagnostic control unit 200 may receive diagnostic results through the interface module 210.

FIG. 3 is a graph showing voltage and current over time of the battery 40 according to an embodiment disclosed in this document.

Referring to FIG. 3, the diagnostic function execution module 224 may diagnose the performance of the battery 40 by executing a diagnostic function for the AICV. As a result of diagnosing the performance of the battery 40, it can be confirmed that there is a problem in the battery cells corresponding to the three sections 300, 302, and 304. In this case, the diagnostic function execution module 224 may obtain a diagnostic result indicating that the battery 40 is abnormal.

FIG. 4A is an exemplary diagram illustrating a battery 40 including a shorted battery cell 402 according to an embodiment disclosed in this document. FIG. 4B shows a graph showing diagnostic results according to an embodiment disclosed in this document.

The diagnostic function execution module 224 may diagnose the performance of the battery 40 by executing a diagnostic function for RoCV.

Referring to FIG. 4A, the battery 40 may include a plurality of battery cells. While the constant voltage capacity of the normal battery cell 400 continues to decrease, the constant voltage capacity of the short-circuited battery cell 402 increases.

Referring to FIG. 4B, it can be seen that the constant voltage capacity rapidly increases in the section 410 where the short circuit occurs. If the increase in constant voltage capacity is higher than a preset threshold value, the diagnostic function execution module 224 obtains a diagnosis result that the battery 40 is abnormal. The preset threshold can be expressed as Equation 1.

[Equation 1]

Here, CV Ah means accumulated current per cycle (unit: Ah).

Figure 5A is a flowchart of a battery performance diagnosis method according to an embodiment disclosed in this document.

Referring to FIG. 5A , when the battery 40 is inserted into the first channel 13 in operation 500, the battery performance diagnosis device 20 may generate a first channel diagnosis module 230. Specifically, the interface module 210 of the battery performance diagnosis device 20 may generate the first channel diagnosis module 230 based on the creation command of the diagnosis control unit 200.

In operation 520, the battery performance diagnosis device 20 may diagnose the performance of the battery 40 by executing at least one diagnostic function among one or more diagnostic functions. The battery diagnosis device 20 can obtain and store diagnosis results.

Specifically, the diagnostic function execution module 226 of the battery performance diagnosis device 20 may diagnose the performance of the battery 40 by executing at least one diagnostic function among one or more diagnostic functions. The diagnostic function execution module 226 may obtain a diagnostic result diagnosing the performance of the battery 40.

The diagnostic function execution module 226 may transmit the diagnostic result to the return module 228.

The return module 228 may return the diagnosis result to the diagnosis control unit 200.

The diagnosis control unit 200 may store diagnosis results.

In operation 540, the battery performance diagnosis device 20 may transmit the stored diagnosis result to the manager terminal 30.

Specifically, the diagnosis control unit 200 of the battery performance diagnosis device 20 may transmit the stored diagnosis result to the transmission unit 260. The transmission unit 260 may transmit the received diagnosis result to the manager terminal 30. Here, the diagnosis result may include a result according to the battery performance diagnosis in operation 520.

5B is a flowchart of a method for executing a diagnostic function according to an embodiment disclosed in this document.

Operations 522, 524, and 526 of FIG. 5B may be included in operation 520 of FIG. 5A. Here, it is assumed that the first channel diagnosis module 230 is created through operation 500 of FIG. 5A. And, the first channel diagnosis module 230 may include an information acquisition module 222, a diagnosis function execution module 226, a return module 228, or a combination thereof.

In operation 522, the battery performance diagnosis device 20 obtains measurement information. Specifically, the information acquisition module 222 of the battery performance diagnosis device 20 may acquire measurement information including the measurement signal and/or state value of the battery 40.

In operation 524, the battery performance diagnosis device 20 may generate a diagnosis result regarding the performance of the battery 40 by executing at least one diagnostic function among one or more diagnostic functions.

Specifically, the diagnostic function execution module 224 of the battery performance diagnosis device 20 may diagnose the performance of the battery 40 by executing at least one diagnostic function among one or more diagnostic functions based on measurement information.

In operation 526, the battery performance diagnosis device 20 may store the diagnosis result.

Specifically, the return module 226 of the battery performance diagnosis device 20 may transmit the diagnosis result to the diagnosis control unit 200.

The diagnosis control unit 200 may store the received diagnosis results.

After operation 526, operation 540 may be performed.

Figure 5C is a flowchart of a method for executing a diagnostic function according to an embodiment disclosed in this document.

Operations 521, 522, 523, 524, and 526 of FIG. 5C may be included in operation 520 of FIG. 5A. Here, it is assumed that the first channel diagnosis module 230 is created through operation 500 of FIG. 5A. And, the first channel diagnosis module 230 includes an information acquisition module 222, a pre-processing module 224, a diagnostic function execution module 226, a return module 228, or a combination thereof.

In operation 521, the battery performance diagnosis device 20 may check the version. The battery performance diagnosis device 20 may check the version of the diagnosis module 220 and the version of the first channel diagnosis module 230.

Specifically, the diagnostic control unit 200 of the battery diagnosis device 20 may transmit a version check command (Init()) to the interface module 210.

The interface module 210 may load the version check module 240 into memory based on a version check command (Init()).

The interface module 210 may convert the version check command (Init()) into a version check command (CheckVersion()) and then transmit it to the version check module 230.

The version check module 230 may compare the version of the diagnosis module 220 with the version of the first channel diagnosis module 230. When the version check module 230 receives the converted version check command (CheckVersion()) from the interface module 210, the version of the diagnosis module 220 can be compared with the version of the first channel diagnosis module 230. there is.

If version verification is complete, operation 522 may be performed.

In operation 523, the battery performance diagnosis device 20 may convert measurement information into commands corresponding to each of the designated diagnostic functions. Specifically, the preprocessing module 224 may convert measurement information into commands corresponding to each of one or more diagnostic functions. The diagnostic function execution module 226 may execute at least one of one or more diagnostic functions based on the converted command.

After operation 523, operations 524, 526, and 540 may be performed.

5D is a flowchart of a method for executing a diagnostic function according to an embodiment disclosed in this document.

Operations 521, 522, 523, 524, 526, 528, 530, and 532 of FIG. 5D may be included in operation 520 of FIG. 5A. Here, it is assumed that the first channel diagnosis module 230 is created through operation 500 of FIG. 5A. Additionally, the diagnostic module 220 may include an information acquisition module 222, a preprocessing module 224, a diagnostic function execution module 226, a return module 228, or a combination thereof.

After the above-described operations 521 to 526 are performed, in operation 528, the charging/discharging control unit 250 may determine whether the diagnosis result indicates a specified abnormality.

If the diagnosis result is determined to be a specified abnormality, in operation 530, the charge/discharge control unit 250 may perform charge/discharge control to temporarily stop or end charging or discharging.

If it is determined that the diagnosis result is not a specified abnormality, operation 540 may proceed.

When the pause or end control is performed, the transmitter 260 may transmit the charge/discharge control result to the manager terminal 30 in operation 532.

Specifically, the transmitting unit 260 may transmit the charging and discharging control results received from the charging and discharging control unit 250 to the manager terminal 30.

Terms such as “include,” “comprise,” or “have,” as used above, mean that the corresponding component can be included unless specifically stated to the contrary, so excluding other components is not necessary. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments disclosed in this document belong, unless otherwise defined. Commonly used terms, such as terms defined in dictionaries, should be interpreted as consistent with the contextual meaning of the relevant technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in this document.

The above description is merely an illustrative explanation of the technical idea disclosed in this document, and those skilled in the art in the technical field to which the embodiments disclosed in this document belong will understand without departing from the essential characteristics of the embodiments disclosed in this document. Various modifications and variations will be possible. Accordingly, the embodiments disclosed in this document are not intended to limit the technical idea of the embodiments disclosed in this document, but rather to explain them, and the scope of the technical idea disclosed in this document is not limited by these embodiments. The scope of protection of the technical ideas disclosed in this document shall be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope shall be interpreted as being included in the scope of rights of this document.

Claims (14)

diagnostic module;
When a battery is inserted into a first channel among a plurality of channels of the charger/discharger, a diagnostic control unit that generates a generation command instructing generation of a first channel diagnostic module for the first channel based on the diagnostic module; and
An interface module that copies the diagnostic module and loads the first channel diagnostic module based on the creation command,
The first channel diagnostic module,
an information acquisition module that acquires measurement information about the battery in real time through the interface module while the battery is being charged or discharged using the charger/discharger;
A diagnostic function execution module configured to diagnose the performance of the battery by executing at least one of one or more diagnostic functions based on the measurement information and obtain a diagnostic result for the at least one diagnostic function; and
Comprising a return module that returns the diagnosis result to the diagnosis control unit through the interface module,
The diagnostic control unit stores the diagnostic result and, when charging or discharging of the battery is completed, generates a termination command instructing termination of the first channel diagnostic module.
Battery performance diagnostic device. In claim 1,
A battery performance diagnosis device further comprising a transmission unit that transmits the diagnosis result to an administrator terminal. In claim 2,
If the diagnosis result indicates a specified abnormality for the battery or the charger/discharger, the battery performance diagnosis device further includes a charge/discharge control unit that controls the charger/discharger to temporarily stop or end charging or discharging the battery. In claim 3,
When the charging or discharging is paused or terminated, the transmitting unit transmits a charge/discharge control result for the pause or termination to the administrator terminal. In claim 1,
Based on the version check command generated by the diagnostic control unit, the battery further includes a version check module loaded into memory by the interface module and comparing the version of the diagnostic module with the version of the first channel diagnostic module. Performance diagnostic device. In claim 1,
The diagnostic function execution module is,
As a first diagnostic function among the one or more diagnostic functions, when the measured current of the battery does not decrease for more than a preset time in the constant voltage charging section of the battery, a diagnostic result of a problem with the battery or a problem with the charger and discharger is generated. A battery performance diagnostic device. In claim 1,
The first channel diagnostic module further includes a preprocessing module that converts the measurement information into commands corresponding to each of the one or more diagnostic functions,
The diagnostic function execution module is a battery performance diagnosis device in which each of the one or more diagnostic functions is executed based on the converted command. When a battery is inserted into a first channel among a plurality of channels of the charger/discharger, a generation command instructing the generation of a first channel diagnostic module for the first channel is generated based on a diagnostic module including one or more diagnostic functions. Generating diagnostic control actions;
an interface operation of loading the first channel diagnosis module based on the creation command; and
An operation of diagnosing the performance of the battery based on the first channel diagnosis module,
The operation of diagnosing the performance of the battery is,
An information acquisition operation of acquiring measurement information about the battery in real time while the battery is being charged or discharged using the charger/discharger;
A diagnostic function execution operation of diagnosing the battery by executing at least one diagnostic function among the one or more diagnostic functions based on the measurement information;
Obtaining a diagnosis result for at least one of the diagnostic functions; and
Including the operation of storing the diagnosis result,
When charging or discharging the battery is completed, generating a shutdown command instructing termination of the first channel diagnostic module,
How to diagnose battery performance. In claim 8,
A battery performance diagnosis method further comprising transmitting the diagnosis result to an administrator terminal. In claim 9,
If the diagnosis result indicates a specified abnormality for the battery or the charger/discharger, the battery performance diagnosis method further includes a charge/discharge control operation that performs control to temporarily stop or terminate charging or discharging of the battery. In claim 10,
When the charging or discharging is paused or terminated, the battery performance diagnosis method further includes transmitting a charge/discharge control result for the pause or termination to an administrator terminal. In claim 8,
An action that generates a version check command;
Loading a version check module into memory based on the version check command; and
A method for diagnosing battery performance, further comprising comparing versions of the diagnostic module and the first channel diagnostic module using the version confirmation module. In claim 8,
The operation of executing the diagnostic function is,
As a first diagnostic function among the one or more diagnostic functions, when the measured current of the battery does not decrease for more than a preset time in the constant voltage charging section of the battery, a diagnostic result of a problem with the battery or a problem with the charger and discharger is obtained. How to diagnose battery performance. In claim 8,
Further comprising a preprocessing operation for converting the measurement information into commands corresponding to each of the one or more diagnostic functions,
The diagnostic function execution operation is performed based on the converted command for each of the one or more diagnostic functions.

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