WO2025159592A1 - 배터리 정보 생성 장치 및 방법 - Google Patents
배터리 정보 생성 장치 및 방법Info
- Publication number
- WO2025159592A1 WO2025159592A1 PCT/KR2025/001528 KR2025001528W WO2025159592A1 WO 2025159592 A1 WO2025159592 A1 WO 2025159592A1 KR 2025001528 W KR2025001528 W KR 2025001528W WO 2025159592 A1 WO2025159592 A1 WO 2025159592A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- profile
- battery
- voltage
- positive
- negative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/10—Measuring sum, difference or ratio
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/12—Measuring rate of change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/371—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Definitions
- the present invention relates to a battery information generating device and method, and more particularly, to a battery information generating device and method that generate battery information that more accurately reflects the state of a battery.
- lithium batteries are receiving attention for their advantages of being able to charge and discharge freely, having a very low self-discharge rate, and having a high energy density, as they have almost no memory effect compared to nickel-based batteries.
- the present invention provides a battery information generation device and method capable of generating a more accurate profile that can be used for battery condition diagnosis.
- a battery information providing device may include a profile obtaining unit configured to obtain a battery profile indicating a correspondence between a capacity and a voltage of a battery; and a control unit configured to set a positive voltage section corresponding to the battery based on a preset negative voltage section, adjust a preset reference positive profile and a reference negative profile based on the positive voltage section to correspond to the battery profile, and generate a positive profile and a negative profile of the battery based on the adjustment result.
- the control unit may be configured to set the positive voltage section based on a target voltage section corresponding to the negative flat section and an end voltage of the battery profile.
- the control unit may be configured to set the sum of the lower limit voltage of the target voltage section and the end voltage as the lower limit voltage of the positive voltage section, and to set the sum of the upper limit voltage of the target voltage section and the end voltage as the upper limit voltage of the positive voltage section.
- the control unit may be configured to adjust the reference positive electrode profile and the reference negative electrode profile so that the end voltage of the positive electrode profile is included in the positive electrode voltage range.
- the above cathode flat section can be preset as a capacity section in which the rate of change of voltage with respect to capacity in the above reference cathode profile is less than or equal to a preset reference ratio.
- the above cathode flat section can be preset as a capacity section greater than or equal to the capacity of the target peak included in the reference anode profile and the reference differential profile based on the reference cathode profile.
- the above target peak may be set as the maximum point with the largest corresponding differential voltage among the multiple maximum points included in the reference differential profile.
- the control unit may be configured to provide information about the battery by outputting the positive electrode profile and the negative electrode profile to the outside.
- a battery pack according to another aspect of the present invention may include a battery information generating device according to one aspect of the present invention.
- a vehicle according to another aspect of the present invention may include a battery information generating device according to one aspect of the present invention.
- a battery information generation method may include a profile acquisition step of acquiring a battery profile indicating a correspondence between a capacity and a voltage of a battery; a positive voltage section setting step of setting a positive voltage section corresponding to the battery based on a preset negative voltage section; a profile adjustment step of adjusting a preset reference positive profile and a reference negative profile based on the positive voltage section to correspond to the battery profile; and a profile generation step of generating a positive profile and a negative profile of the battery based on an adjustment result of the profile adjustment step.
- a non-transitory computer-readable storage medium may store a computer program for executing a battery information generation method, including a profile acquisition step of acquiring a battery profile indicating a correspondence between a capacity and a voltage of a battery; an anode voltage section setting step of setting a cathode voltage section corresponding to the battery based on a preset cathode flat section; a profile adjustment step of adjusting a preset reference cathode profile and a reference cathode profile based on the cathode voltage section to correspond to the battery profile; and a profile generation step of generating a cathode profile and a cathode profile of the battery based on an adjustment result of the profile adjustment step.
- a battery information generation device can drastically shorten the time for generating a positive profile and a negative profile corresponding to a battery by adjusting a reference positive profile and a reference negative profile by adding a limiting condition that the end voltage of the positive profile is included in the positive voltage range.
- FIG. 1 is a schematic diagram illustrating a battery information generation device according to one embodiment of the present invention.
- FIG. 2 is a diagram schematically illustrating a battery profile according to one embodiment of the present invention.
- FIG. 3 is a schematic diagram illustrating a reference anode profile and a reference cathode profile according to one embodiment of the present invention.
- FIG. 4 is a diagram schematically illustrating an adjustment result according to one embodiment of the present invention.
- FIG. 5 is a diagram schematically illustrating a reference differential profile according to one embodiment of the present invention.
- FIG. 6 is a schematic drawing of a battery pack according to another embodiment of the present invention.
- Figure 7 is a schematic drawing of a vehicle according to another embodiment of the present invention.
- FIG. 8 is a diagram schematically illustrating a battery information generation method according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram illustrating a battery information generation device (100) according to one embodiment of the present invention.
- the battery information generation device (100) may include a profile acquisition unit (110) and a control unit (120).
- the battery which is the target of information generation, refers to a physically separable, independent cell having a negative terminal and a positive terminal.
- a lithium-ion battery or a lithium polymer battery may be considered a battery.
- the battery may be of a cylindrical, prismatic, or pouch type.
- the battery may refer to a battery bank, battery module, or battery pack in which multiple cells are connected in series and/or parallel.
- the battery is described below as referring to a single, independent cell.
- the profile acquisition unit (110) may be configured to acquire a battery profile (BP) indicating a correspondence between the capacity and voltage of the battery.
- BP battery profile
- a battery profile is a profile that represents the relationship between voltage (V) and capacity (Q) when the battery's SOC is charged from a preset start SOC or 0% to a preset end SOC or 100%.
- a battery profile (BP) may represent the relationship between voltage (V) and capacity (Q) when the battery's SOC is discharged from a preset start SOC or 100% to a preset end SOC or 0%.
- BP battery profile
- the profile acquisition unit (110) can directly read or receive the battery profile (BP) of the battery from the outside.
- the profile acquisition unit (110) can acquire the battery profile (BP) by being connected to the outside via wire and/or wirelessly to read or receive the battery profile (BP).
- the profile acquisition unit (110) may generate a battery profile (BP) based on battery information regarding the voltage and capacity of the battery.
- the profile acquisition unit (110) may acquire a battery profile (BP) by directly generating the battery profile (BP) based on the battery information.
- FIG. 2 is a schematic diagram illustrating a battery profile (BP) according to one embodiment of the present invention.
- the battery profile (BP) can be expressed as an X-Y graph in which the horizontal X-axis is set to capacity (Q, capacity) and the vertical Y-axis is set to voltage (V, voltage).
- the starting voltage (e.g., the charging start voltage of the battery) of the battery profile (BP) is Vi[V]
- the ending voltage e.g., the charging end voltage of the battery
- the starting capacity (e.g., the charging start capacity of the battery) of the battery profile (BP) is Qi[Ah]
- the ending capacity e.g., the charging end capacity of the battery
- the starting voltage (Vi) of the battery profile (BP) is 3.0 [V]
- the ending voltage (Vf) is 4.0 [V].
- the starting capacity (Qi) of the battery profile (BP) is 5 [Ah]
- the ending capacity (Qf) is 45 [Ah].
- the profile acquisition unit (110) may be connected to the control unit (120) so as to be able to communicate with it.
- the profile acquisition unit (110) may be connected to the control unit (120) via a wire and/or wireless connection. Through this connection, the profile acquisition unit (110) may transmit the acquired battery profile (BP) to the control unit (120).
- the control unit (120) may read the battery profile (BP) from the profile acquisition unit (110) at a necessary time.
- the control unit (120) may be configured to set a positive voltage section (PR) corresponding to the battery based on a preset negative voltage plateau section (RR).
- PR positive voltage section
- RR preset negative voltage plateau section
- the cathode plateau region (RR) refers to a capacity region where the voltage change of the cathode is minimal as the capacity of the cathode increases. This condition can be preset. For example, a capacity region where the voltage change relative to the capacity is below a certain level can be preset as the cathode plateau region (RR). Examples of the cathode plateau region (RR) will be described later.
- FIG. 3 is a schematic diagram illustrating a reference positive electrode profile (Rp) and a reference negative electrode profile (Rn) according to one embodiment of the present invention.
- a capacity range 35 [Ah] to about 60 [Ah]
- RR negative electrode flat range
- control unit (120) can be configured to set a negative voltage section (NR) corresponding to a negative flat section (RR) and a positive voltage section (PR) based on the end voltage of the battery profile (BP).
- NR negative voltage section
- PR positive voltage section
- a lower limit capacity and an upper limit capacity of a cathode plateau section (RR) can be set for a preset reference cathode profile (Rn).
- a cathode voltage section (NR) can be set as a voltage section including a voltage corresponding to the upper limit capacity of the cathode plateau section (RR) and a voltage corresponding to the lower limit capacity.
- the cathode voltage section (NR) can be set to a voltage section of Va to Vb.
- control unit (120) can set the positive voltage section (PR) based on the voltage included in the negative voltage section (NR) and the battery voltage by considering the correlation among the battery voltage, positive voltage, and negative voltage.
- the capacity at which the negative reaction ends during the charging process of the battery is included in the negative plateau section (RR).
- the capacity at which the negative reaction starts during the discharging process of the battery is included in the negative plateau section (RR).
- the negative voltage corresponding to the end voltage (Vf) of the battery profile (BP) is included in the negative voltage section (NR).
- the positive voltage corresponding to the end voltage (Vf) of the battery profile (BP) may be included in the positive voltage section (PR) which is the sum of the end voltage (Vf) of the battery profile (BP) and the negative voltage section (NR). Therefore, the control unit (120) may set the positive voltage section (PR) by adding the negative voltage section (NR) corresponding to the negative plateau section (RR) and the end voltage (Vf) of the battery profile (BP).
- control unit (120) may be configured to set the sum of the lower limit voltage of the negative voltage section (NR) and the end voltage of the battery profile (BP) as the lower limit voltage of the positive voltage section (PR).
- control unit (120) may be configured to set the sum of the upper limit voltage of the negative voltage section (NR) and the end voltage of the battery profile (BP) as the upper limit voltage of the positive voltage section (PR).
- the end voltage of the battery profile (BP) is Vf[V]
- the lower limit voltage of the negative voltage section (NR) is Va[V]
- the upper limit voltage of the negative voltage section (NR) is Vb[V].
- the control unit (120) can set the sum of the end voltage (Vf) of the battery profile (BP) and the lower limit voltage (Va) of the negative voltage section (NR) as the lower limit voltage (Vc) of the positive voltage section (PR).
- the control unit (120) can set the sum of the end voltage (Vf) of the battery profile (BP) and the upper limit voltage (Vb) of the negative voltage section (NR) as the upper limit voltage (Vd) of the positive voltage section (PR).
- the control unit (120) may be configured to adjust a preset reference positive profile (Rp) and a reference negative profile (Rn) based on a positive voltage section (PR) to correspond to a battery profile (BP), and to generate a positive profile and a negative profile of the battery according to the adjustment result.
- Rp preset reference positive profile
- Rn reference negative profile
- the reference positive electrode profile (Rp) may be a profile indicating a correspondence between the capacity and voltage of a reference positive electrode cell preset to correspond to the positive electrode of the battery.
- the reference positive electrode cell may be a positive coin half cell or a positive electrode of a three-electrode cell.
- the reference negative electrode profile (Rn) may be a profile indicating a correspondence between the capacity and voltage of a reference negative electrode cell preset to correspond to the negative electrode of the battery.
- the reference negative electrode cell may be a negative coin half cell or a negative electrode of a three-electrode cell.
- the reference positive profile (Rp) may include a positive engagement start point (pi0) and a positive engagement end point (pf0)
- the reference negative profile (Rn) may include a negative engagement start point (ni0) and a negative engagement end point (nf0).
- the start voltage of the reference profile (R) corresponds to the voltage difference between the positive engagement start point (pi0) and the negative engagement start point (ni0)
- the end voltage of the reference profile (R) corresponds to the voltage difference between the positive engagement end point (pf0) and the negative engagement end point (nf0).
- the capacity of the negative engagement end point (nf0) may be included in the negative plateau section (RR).
- the voltage of the positive engagement end point (pf0) may be included in the positive voltage section (PR).
- the control unit (120) can adjust the reference positive electrode profile (Rp) and the reference negative electrode profile (Rn) to correspond to the battery profile (BP). For example, the control unit (120) can adjust the reference positive electrode profile (Rp) and the reference negative electrode profile (Rn) to generate an adjusted positive electrode profile (Rp') and an adjusted negative electrode profile (Rn'). In addition, the control unit (120) can generate a comparison profile (R') from the adjusted positive electrode profile (Rp') and the adjusted negative electrode profile (Rn'). The control unit (120) can repeatedly adjust the reference positive electrode profile (Rp) and the reference negative electrode profile (Rn) until the comparison profile (R') corresponds to the battery profile (BP).
- control unit (120) can generate a plurality of comparison profiles (R') by shifting or capacity scaling the reference positive profile (Rp) and the reference negative profile (Rn), and can specify a comparison profile (R') among the plurality of comparison profiles (R') that has a minimum error (e.g., root mean squared error (RMSE)) with respect to the battery profile (BP). Then, the control unit (120) can set an adjusted positive profile (Rp') corresponding to the specified comparison profile (R') as the positive profile of the battery. Then, the control unit (120) can set an adjusted negative profile (Rn') corresponding to the specified comparison profile (R') as the negative profile of the battery. For example, the adjusted positive profile (Rp') and the adjusted negative profile (Rn') corresponding to the specified comparison profile (R') can be estimated as the positive profile and negative profile of the battery, respectively.
- RMSE root mean squared error
- control unit (120) may be configured to adjust the reference positive profile (Rp) and the reference negative profile (Rn) such that the end voltage of the positive profile falls within the positive voltage interval (PR).
- control unit (120) may adjust the reference positive profile (Rp) and the reference negative profile (Rn) such that the voltage of the positive participation end point of the adjusted positive profile (Rp') falls within the positive voltage interval (PR).
- FIG. 4 is a diagram schematically illustrating an adjustment result according to one embodiment of the present invention.
- a reference positive profile (Rp) may be adjusted to generate an adjusted positive profile (Rp'), and a reference negative profile (Rn) may be adjusted to generate an adjusted negative profile (Rn').
- the adjusted positive profile (Rp') includes a positive engagement start point (pi') and a positive engagement end point (pf'), and the adjusted negative profile (Rn') includes a negative engagement start point (ni') and a negative engagement end point (nf').
- the start voltage of the comparison profile (R') corresponds to the voltage difference between the positive engagement start point (pi') and the negative engagement start point (ni')
- the end voltage of the comparison profile (R') corresponds to the voltage difference between the positive engagement end point (pf') and the negative engagement end point (nf').
- the voltage of the positive engagement end point (pf') of the adjusted positive profile (Rp') may be included in the positive voltage section (PR).
- a battery information generation device (100) can adjust a reference positive electrode profile (Rp) and a reference negative electrode profile (Rn) by adding a limiting condition that the end voltage of the positive electrode profile is included in a positive voltage section (PR).
- Rp reference positive electrode profile
- Rn reference negative electrode profile
- the battery information generation device (100) since the battery information generation device (100) does not consider a case in which the end voltage of the positive profile falls outside the positive voltage section (PR) in the process of adjusting the reference positive profile (Rp) and the reference negative profile (Rn), the time for generating the positive profile and the negative profile can be dramatically shortened compared to a case in which the end voltage of the positive profile is not limited. This is because the number of a plurality of comparison profiles (R') to be compared with the battery profile (BP) is reduced due to the limitation condition that the end voltage of the positive profile is included in the positive voltage section (PR).
- the voltage of the negative participation end point (nf') of the negative profile (Rn') is limited to within the negative voltage section (NR)
- the voltage of the positive participation end point (pf') of the positive profile (Rp') may be included within the positive voltage section (PR).
- the capacity difference between the negative participation start point (ni') and the negative termination end point (nf') of the negative profile (Rn') must correspond to the capacity (Qf-Qi) of the battery, the negative participation start point (ni') may be located on an excessively high voltage (or low capacity) side, or the scale of the reference negative profile (Rn) may be excessively changed (e.g., increased).
- the positive electrode participation start point (pi') since the voltage difference between the positive electrode participation start point (pi') and the negative electrode participation start point (ni') must correspond to the starting voltage (Vi) of the battery profile, the positive electrode participation start point (pi') may be located on the high voltage (or high capacity) side, or the scale of the reference positive electrode profile (Rp) may be excessively changed (e.g., increased).
- the battery information generation device (100) can generate the positive electrode profile of the battery more quickly and accurately by setting the adjustment conditions for the positive electrode profile instead of the negative electrode profile.
- the profile acquisition unit (110) and/or control unit (120) provided in the battery information generation device (100) may optionally include a processor, an application-specific integrated circuit (ASIC), another chipset, a logic circuit, a register, a communication modem, a data processing device, etc. known in the art to execute various control logics performed in the present invention.
- the control logic when the control logic is implemented in software, the profile acquisition unit (110) and/or the control unit (120) may be implemented as a set of program modules.
- the program modules may be stored in a memory and executed by the profile acquisition unit (110) and/or the control unit (120).
- the memory may be located inside or outside the profile acquisition unit (110) and/or the control unit (120), and may be connected to the profile acquisition unit (110) and/or the control unit (120) by various well-known means.
- the battery information generation device (100) may further include a storage unit (130).
- the storage unit (130) may store data or programs required for each component of the battery information generation device (100) to perform operations and functions, or data generated in the process of performing operations and functions.
- the storage unit (130) is not particularly limited in type as long as it is a known information storage means known to be capable of recording, erasing, updating, and reading data.
- the information storage means may include a random access memory (RAM), a flash memory, a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a register, etc.
- the storage unit (130) may store program codes defining processes executable by the profile acquisition unit (110) and the control unit (120).
- the storage unit (130) may have information indicating the voltages of each of the reference positive electrode participation start point (pi0), the reference positive electrode participation end point (pf0), the reference negative electrode participation start point (ni0), and the reference negative electrode participation end point (nf0) pre-recorded.
- the voltage difference between the reference positive electrode participation start point (pi0) and the reference negative electrode participation start point (ni0) may be equal to a first set voltage (e.g., 3.0 [V]).
- the voltage difference between the reference positive electrode participation end point (pf0) and the reference negative electrode participation end point (nf0) may be equal to a second set voltage (e.g., 4.0 [V]).
- the capacity interval after the target peak (tp) is known to be a region where the anode is the dominant reactant, while the cathode is less involved in the reaction. Due to this different reaction participation of the anode and cathode, the rate of change in voltage relative to capacity is not significant during the cathode plateau (RR).
- the cathode plateau section (RR) can be preset as a capacity section in which the rate of change of voltage with respect to capacity is less than or equal to a preset reference ratio in the reference cathode profile (Rn).
- the voltage change rate may be less than the reference rate in the capacity range of 35 [Ah] to about 60 [Ah]. Therefore, the capacity range of 35 [Ah] to about 60 [Ah] may be set as the cathode plateau range (RR).
- the cathode plateau section (RR) may be preset as a capacity section greater than or equal to the capacity of a target peak (tp) included in a reference differential profile (DR) based on the reference anode profile (Rp) and the reference cathode profile (Rn).
- the target peak (tp) may be set as a maximum point having the largest corresponding differential voltage among a plurality of maximum points included in the reference differential profile (DR).
- FIG. 5 is a schematic diagram illustrating a reference differential profile (DR) according to one embodiment of the present invention.
- the reference differential profile (DR) is a profile representing the correspondence between a capacity (Q) and a differential voltage (dV/dQ).
- the differential voltage (dV/dQ) is a value obtained by differentiating the voltage (V) with respect to the capacity (Q), and represents the instantaneous rate of change of the voltage with respect to the capacity.
- the reference differential profile (DR) according to the embodiment of Fig. 5 is a profile derived by differentiating the reference profile (R) according to the embodiment of Fig. 3 with respect to capacity.
- the reference differential profile (DR) may include multiple minima and multiple maxima.
- the local maxima with the largest corresponding differential voltage may be set as the target peak (tp).
- the local maxima corresponding to the capacity Qk[Ah] may be determined as the target peak (tp).
- the local maxima with the largest corresponding differential voltage may be set as the target peak (tp).
- the target peak (tp) may be determined among multiple local maxima included in a capacity section greater than or equal to Qn[Ah].
- control unit (120) adjusts the reference positive electrode profile (Rp) and the reference negative electrode profile (Rn) is described.
- control unit (120) can generate an adjusted positive electrode profile (Rp') by shrinking or expanding the reference positive electrode profile (Rp) so that the size of the capacity range between two points (pi0, pf0) of the reference positive electrode profile (Rp) matches the size of the capacity range of the battery profile (BP). Accordingly, the capacity difference between the two points (pi', pf') of the adjusted positive electrode profile (Rp') can match the capacity range of the battery profile (BP).
- control unit (120) can generate an adjusted negative profile (Rn') by shrinking or expanding the reference negative profile (Rn) so that the size of the capacity range between two points (ni, nf) of the reference negative profile (Rn) matches the size of the capacity range of the battery profile (BP). Accordingly, the capacity difference between the two points (ni', nf') of the adjusted negative profile (Rn') can match the capacity range of the battery profile (BP).
- the adjusted anode profile (Rp') is a result of the contraction of the reference anode profile (Rp)
- the adjusted cathode profile (Rn') is a result of the expansion of the reference cathode profile (Rn).
- the positive participation end point (pf') on the adjusted positive profile (Rp') corresponds to the positive participation end point (pf) on the reference positive profile (Rp).
- the negative participation end point (nf') on the adjusted negative profile (Rn') corresponds to the negative participation end point (nf) on the reference negative profile (Rn).
- the capacity difference between the positive engagement start point (pi') and the positive engagement end point (pf') of the adjusted positive electrode profile (Rp') corresponds to the size of the capacity range of the battery profile (BP).
- the capacity difference between the negative engagement start point (ni') and the negative engagement end point (nf') of the adjusted negative electrode profile (Rn') corresponds to the size of the capacity range of the battery profile (BP).
- the capacity range by the two points (pi', pf') of the adjusted positive electrode profile (Rp') matches the capacity range by the two points (ni', nf') of the adjusted negative electrode profile (Rn').
- the control unit (120) can generate a comparison profile (R') by subtracting the profile between the two points (pi', pf') of the adjusted positive electrode profile (Rp') from the profile between the two points (ni', nf') of the adjusted negative electrode profile (Rn').
- the control unit (120) can calculate the error (profile error) between the battery profile (BP) and the comparison profile (R').
- the control unit (120) can adjust the reference positive electrode profile (Rp) and the reference negative electrode profile (Rn) to generate a plurality of comparison profiles (R'), and calculate an error between each of the plurality of comparison profiles (R') and the battery profile (BP). Then, the control unit (120) can specify a comparison profile (R') having the smallest calculated error among the plurality of comparison profiles (R'). Finally, the control unit (120) can set the adjusted positive electrode profile (Rp') corresponding to the specified comparison profile (R') as the positive electrode profile of the battery, and set the corresponding adjusted negative electrode profile (Rn') as the negative electrode profile of the battery.
- control unit (120) can map at least two of the adjusted positive profile (Rp'), the adjusted negative profile (Rn'), the positive engagement start point (pi'), the positive engagement end point (pf'), the negative engagement start point (ni'), the negative engagement end point (nf'), the first scale factor, the second scale factor, the comparison profile (R'), and the profile error to each other and record them in the storage unit (130).
- the first scale factor may represent the ratio of the capacity difference between two points (pi', pf') to the capacity difference between two points (pi0, pf0).
- the second scale factor may represent the ratio of the capacity difference between two points (ni', nf') to the capacity difference between two points (ni0, nf0).
- the first scale factor is the ratio of the change of the adjusted anode profile (Rp') to the reference anode profile (Rp), which is the anode change ratio.
- the second scale factor is the ratio of the change of the adjusted cathode profile (Rn') to the reference cathode profile (Rn), which is the cathode change ratio.
- the control unit (120) can be configured to provide information about the battery by outputting the positive and negative profiles to the outside.
- control unit (120) may be connected to an external device capable of diagnosing the condition of the battery, such that the control unit (120) can communicate with it via wired and/or wireless communication.
- the control unit (120) may transmit a positive profile and/or a negative profile to the external device via wired and/or wireless communication.
- the external device may include a diagnostic device or a server, and any device capable of diagnosing the condition of the battery by analyzing the positive profile and/or the negative profile may be applied without limitation.
- the state of the battery can be diagnosed based on the positive profile and negative profile.
- the battery information generation device (100) can improve the accuracy of battery status diagnosis by generating a positive profile and a negative profile used to diagnose the status of the battery.
- the battery information generation device (100) according to the present invention can be applied to a BMS (Battery Management System).
- the BMS according to the present invention can include the battery information generation device (100) described above.
- at least some of the components of the battery information generation device (100) can be implemented by supplementing or adding to the functions of the components included in a conventional BMS.
- the profile acquisition unit (110), control unit (120), and storage unit (130) of the battery information generation device (100) can be implemented as components of the BMS.
- the battery information generation device (100) according to the present invention may be provided in a battery pack.
- the battery pack according to the present invention may include the battery information generation device (100) described above and one or more battery cells.
- the battery pack may further include electrical components (relays, fuses, etc.) and a case.
- FIG. 6 is a drawing illustrating an exemplary configuration of a battery pack (10) including a battery information generation device (100) according to one embodiment of the present invention.
- the positive terminal of the battery (11) can be connected to the positive terminal (P+) of the battery pack (10), and the negative terminal of the battery (11) can be connected to the negative terminal (P-) of the battery pack (10).
- the measuring unit (12) can be connected to a first sensing line (SL1), a second sensing line (SL2), and a third sensing line (SL3).
- the measuring unit (12) can be connected to a positive terminal of the battery (11) through the first sensing line (SL1), and can be connected to a negative terminal of the battery (11) through the second sensing line (SL2).
- the measuring unit (12) can 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).
- the measuring unit (12) can be connected to the current measuring unit (A) through the third sensing line (SL3).
- the current measuring unit (A) can be an ammeter or a shunt resistor capable of measuring the charging current and discharging current of the battery (11).
- the measuring unit (12) can measure the charging current of the battery (11) through the third sensing line (SL3) to calculate the charging amount.
- the measuring unit (12) can measure the discharging current of the battery (11) through the third sensing line (SL3) to calculate the discharging amount.
- the profile acquisition unit (110) can read or receive battery information regarding the voltage and current of the battery from the measurement unit (12). Then, the profile acquisition unit (110) can generate a battery profile (BP) based on the battery information.
- BP battery profile
- the profile acquisition unit (110) can read or receive a battery profile (BP) from the measurement unit (12).
- BP battery profile
- An external device may be connected to the positive terminal (P+) and negative terminal (P-) of the battery pack (10).
- the external device may be a charging device or a load.
- the positive terminal of the battery (11), the positive terminal (P+) of the battery pack (10), the external device, the negative terminal (P-) of the battery pack (10), and the negative terminal of the battery (11) may be electrically connected.
- FIG. 7 is a schematic drawing of a vehicle (700) according to another embodiment of the present invention.
- a battery pack (710) may be included in a vehicle (700), such as an electric vehicle (EV) or a hybrid vehicle (HV). Furthermore, the battery pack (710) may drive the vehicle (700) by supplying power to a motor through an inverter provided in the vehicle (700).
- the battery pack (710) may include a battery information generation device (100).
- the vehicle (700) may include a battery information generation device (100).
- the battery information generation device (100) may be an onboard device included in the vehicle (700).
- FIG. 10 is a diagram schematically illustrating a battery information generation method according to another embodiment of the present invention.
- a battery information generation method may include a profile acquisition step (S100), a positive voltage section setting step (S200), a profile adjustment step (S300), and a profile generation step (S400).
- Each step of the battery information generation method can be performed by the battery information generation device (100).
- the battery information generation device (100) For convenience of explanation, any content that overlaps with the previously described content will be omitted or briefly described.
- the profile acquisition step (S100) is a step of acquiring a battery profile (BP) indicating a correspondence between the capacity and voltage of a battery, and can be performed by a profile acquisition unit (110).
- the profile acquisition unit (110) can directly read or receive a battery profile (BP) from the outside.
- the profile acquisition unit (110) can acquire a battery profile (BP) by reading or receiving a battery profile (BP) while being connected to the outside via wire and/or wirelessly.
- the profile acquisition unit (110) may generate a battery profile (BP) based on battery information regarding the voltage and capacity of the battery.
- the profile acquisition unit (110) may acquire a battery profile (BP) by directly generating the battery profile (BP) based on the battery information.
- the positive voltage section setting step (S200) is a step of setting a positive voltage section (PR) corresponding to the battery based on a preset negative voltage flat section (RR), and can be performed by the control unit (120).
- the control unit (120) may be configured to set a negative voltage section (NR) corresponding to a negative plateau section (RR) and a positive voltage section (PR) based on the end voltage of the battery profile (BP).
- NR negative voltage section
- PR positive voltage section
- control unit (120) may be configured to set the sum of the lower limit voltage of the negative voltage section (NR) and the end voltage of the battery profile (BP) as the lower limit voltage of the positive voltage section (PR).
- control unit (120) may be configured to set the sum of the upper limit voltage of the negative voltage section (NR) and the end voltage of the battery profile (BP) as the upper limit voltage of the positive voltage section (PR).
- the profile adjustment step (S300) is a step of adjusting a preset reference positive profile (Rp) and a reference negative profile (Rn) to correspond to a battery profile (BP) based on a positive voltage section (PR), and can be performed by the control unit (120).
- the control unit (120) can adjust the reference anode profile (Rp) and the reference cathode profile (Rn) so that the voltage of the anode participation end point of the adjusted anode profile (Rp') is included within the anode voltage range (PR).
- the profile creation step (S400) is a step of creating a positive profile and a negative profile of the battery based on the adjustment result of the profile adjustment step, and can be performed by the control unit (120).
- control unit (120) can generate a plurality of comparison profiles (R') by shifting or capacity scaling the reference positive profile (Rp) and the reference negative profile (Rn), and can specify a comparison profile (R') among the plurality of comparison profiles (R') that has a minimum error with the battery profile (BP). Then, the control unit (120) can set an adjusted positive profile (Rp') corresponding to the specified comparison profile (R') as the positive profile of the battery. Then, the control unit (120) can set an adjusted negative profile (Rn') corresponding to the specified comparison profile (R') as the negative profile of the battery. For example, the adjusted positive profile (Rp') and the adjusted negative profile (Rn') corresponding to the specified comparison profile (R') can be estimated as the positive profile and negative profile of the battery, respectively.
- the embodiments of the present invention described above are not implemented only through devices and methods, but may also be implemented through a program that realizes a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded, and such implementation can be easily implemented by an expert in the technical field to which the present invention belongs based on the description of the embodiments described above.
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims (12)
- 배터리의 용량과 전압 간의 대응 관계를 나타내는 배터리 프로파일을 획득하도록 구성된 프로파일 획득부; 및미리 설정된 음극 평탄 구간에 기반하여 상기 배터리에 대응되는 양극 전압 구간을 설정하고, 상기 양극 전압 구간에 기반하여, 미리 설정된 기준 양극 프로파일 및 기준 음극 프로파일을 상기 배터리 프로파일에 대응되도록 조정하며, 조정 결과에 따라 상기 배터리의 양극 프로파일 및 음극 프로파일을 생성하도록 구성된 제어부를 포함하는 배터리 정보 생성 장치.
- 제1항에 있어서,상기 제어부는,상기 음극 평탄 구간에 대응된 타겟 전압 구간과 상기 배터리 프로파일의 종료 전압에 기반하여 상기 양극 전압 구간을 설정하도록 구성된 배터리 정보 생성 장치.
- 제2항에 있어서,상기 제어부는,상기 타겟 전압 구간의 하한 전압과 상기 종료 전압을 합한 값을 상기 양극 전압 구간의 하한 전압으로 설정하고, 상기 타겟 전압 구간의 상한 전압과 상기 종료 전압을 합한 값을 상기 양극 전압 구간의 상한 전압으로 설정하도록 구성된 배터리 정보 생성 장치.
- 제1항에 있어서,상기 제어부는,상기 양극 프로파일의 종료 전압이 상기 양극 전압 구간에 포함되도록 상기 기준 양극 프로파일 및 상기 기준 음극 프로파일을 조정하도록 구성된 배터리 정보 생성 장치.
- 제1항에 있어서,상기 음극 평탄 구간은,상기 기준 음극 프로파일에서 용량에 대한 전압의 변화율이 미리 설정된 기준 비율 이하인 용량 구간으로 미리 설정된 배터리 정보 생성 장치.
- 제1항에 있어서,상기 음극 평탄 구간은,상기 기준 양극 프로파일과 상기 기준 음극 프로파일에 기반한 기준 미분 프로파일에 포함된 타겟 피크의 용량 이상의 용량 구간으로 미리 설정된 배터리 정보 생성 장치.
- 제6항에 있어서,상기 타겟 피크는,상기 기준 미분 프로파일에 포함된 복수의 극대점 중에서 대응되는 미분 전압이 가장 큰 극대점으로 설정된 배터리 정보 생성 장치.
- 제1항에 있어서,상기 제어부는,상기 양극 프로파일 및 상기 음극 프로파일을 외부로 출력함으로써 상기 배터리에 대한 정보를 제공하도록 구성된 배터리 정보 생성 장치.
- 제1항 내지 제8항 중 어느 한 항에 따른 배터리 정보 생성 장치를 포함하는 배터리 팩.
- 제1항 내지 제8항 중 어느 한 항에 따른 배터리 정보 생성 장치를 포함하는 자동차.
- 배터리의 용량과 전압 간의 대응 관계를 나타내는 배터리 프로파일을 획득하는 프로파일 획득 단계;미리 설정된 음극 평탄 구간에 기반하여 상기 배터리에 대응되는 양극 전압 구간을 설정하는 양극 전압 구간 설정 단계;상기 양극 전압 구간에 기반하여, 미리 설정된 기준 양극 프로파일 및 기준 음극 프로파일을 상기 배터리 프로파일에 대응되도록 조정하는 프로파일 조정 단계; 및상기 프로파일 조정 단계의 조정 결과에 따라 상기 배터리의 양극 프로파일 및 음극 프로파일을 생성하는 프로파일 생성 단계를 포함하는 배터리 정보 생성 방법.
- 배터리의 용량과 전압 간의 대응 관계를 나타내는 배터리 프로파일을 획득하는 프로파일 획득 단계;미리 설정된 음극 평탄 구간에 기반하여 상기 배터리에 대응되는 양극 전압 구간을 설정하는 양극 전압 구간 설정 단계;상기 양극 전압 구간에 기반하여, 미리 설정된 기준 양극 프로파일 및 기준 음극 프로파일을 상기 배터리 프로파일에 대응되도록 조정하는 프로파일 조정 단계; 및상기 프로파일 조정 단계의 조정 결과에 따라 상기 배터리의 양극 프로파일 및 음극 프로파일을 생성하는 프로파일 생성 단계를 포함하는 배터리 정보 생성 방법을 실행하기 위한 컴퓨터 프로그램이 저장된 비일시적 컴퓨터 판독가능 저장 매체.
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| MX2026002281A MX2026002281A (es) | 2024-01-26 | 2026-02-25 | Aparato y metodo para generar informacion sobre baterias |
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| WO2019234390A1 (en) * | 2018-06-07 | 2019-12-12 | Oxis Energy Limited | Battery management system and method |
| US20210359347A1 (en) * | 2018-08-06 | 2021-11-18 | The Regents Of The University Of Michigan | Electrode Diagnostics For Lithium Ion Battery |
| KR20210141096A (ko) * | 2020-05-15 | 2021-11-23 | 주식회사 엘지에너지솔루션 | 배터리 상태 진단 장치 및 방법 |
| KR20220021730A (ko) * | 2020-08-14 | 2022-02-22 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20220031412A (ko) * | 2020-09-04 | 2022-03-11 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20240012350A (ko) | 2021-05-24 | 2024-01-29 | 카오카부시키가이샤 | 온열구 |
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| KR102848878B1 (ko) * | 2020-12-28 | 2025-08-20 | 주식회사 엘지에너지솔루션 | 이차 전지 진단 장치 및 방법 |
-
2024
- 2024-01-26 KR KR1020240012350A patent/KR102825235B1/ko active Active
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2025
- 2025-01-24 WO PCT/KR2025/001528 patent/WO2025159592A1/ko active Pending
- 2025-01-24 US US19/036,876 patent/US20250264537A1/en active Pending
- 2025-01-24 CN CN202580002859.2A patent/CN121219598A/zh active Pending
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Patent Citations (6)
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| WO2019234390A1 (en) * | 2018-06-07 | 2019-12-12 | Oxis Energy Limited | Battery management system and method |
| US20210359347A1 (en) * | 2018-08-06 | 2021-11-18 | The Regents Of The University Of Michigan | Electrode Diagnostics For Lithium Ion Battery |
| KR20210141096A (ko) * | 2020-05-15 | 2021-11-23 | 주식회사 엘지에너지솔루션 | 배터리 상태 진단 장치 및 방법 |
| KR20220021730A (ko) * | 2020-08-14 | 2022-02-22 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20220031412A (ko) * | 2020-09-04 | 2022-03-11 | 주식회사 엘지에너지솔루션 | 배터리 관리 장치 및 방법 |
| KR20240012350A (ko) | 2021-05-24 | 2024-01-29 | 카오카부시키가이샤 | 온열구 |
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| KR102825235B1 (ko) | 2025-06-24 |
| US20250264537A1 (en) | 2025-08-21 |
| CN121219598A (zh) | 2025-12-26 |
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