Battery charging control device and method

Abstract

A battery charging control device according to an embodiment of the present invention can include at least one processor; and a memory that stores at least one instruction executed through the at least one processor. The at least one instruction can include an instruction to check a current temperature value, a current charge state value, and an initial charge state value at the start of charging of the battery; an instruction to check a temperature correction value stored corresponding to the current charge state value and the initial charge state value; an instruction to correct the current temperature value based on the checked temperature correction value; and an instruction to determine a charging current value for charging the battery based on the corrected current temperature value and the current charge state value.

Description

Technical Field

[0001] This application claims the benefit of the filing date of Korean Patent Application No. 10-2023-0074109, filed with the Korean Intellectual Property Office on June 9, 2023, and all of the content disclosed in the document of the Korean patent application is incorporated herein by reference.

[0002] The present invention relates to a battery charging control device and method, and more particularly, to a battery charging control device and method for controlling the charging current of a battery.

Background Art

[0003] A secondary battery is a battery that can be reused through charging after discharge, and can be used as an energy source for small devices such as mobile phones, tablet PCs, and vacuum cleaners, and can also be used as an energy source for medium and large devices such as automobiles and smart grid ESSs (Energy Storage Systems).

[0004] Secondary batteries are applied to a system in the form of an assembly such as a battery module in which a number of battery cells are connected in series or parallel according to the requirements of the system, or a battery pack in which battery modules are connected in series or parallel. In the case of medium and large devices such as electric vehicles, in order to meet the required capacity of the corresponding device, a high-capacity battery system in which a number of battery packs are connected in parallel can be applied.

[0005] In recent years, as the capacity of secondary batteries has increased, rapid charging technologies that can charge the batteries more quickly have emerged. When charging is carried out in a rapid charging method, a stepwise charging method is mainly used in which charging is carried out with a high charging current at the initial stage of charging, and the charging current is gradually attenuated as the SOC (State Of Charge) or voltage value of the battery increases. Here, considering charging safety, the charging current can be adjusted based on the current temperature of the battery.

[0006] In the case of rapid charging, since charging proceeds at a relatively high current compared to general charging methods, temperature variations may occur between battery cells. At this time, considering the characteristics of the battery where the lithium precipitation limit point changes with temperature, the limiting current must be applied based on the lowest temperature.

[0007] On the other hand, due to the structure of the battery system, it is often difficult to arrange a plurality of temperature sensors. Therefore, a method is utilized where the lowest temperature of the battery cell is estimated using a temperature estimation algorithm to adjust the charging current, or the measured temperature value by the temperature sensor is corrected using a pre-measured temperature variation value to adjust the charging current. However, in the case of the temperature estimation method, the efficiency in terms of data processing decreases, and in the case of the method using the pre-measured temperature variation value, it is difficult to adjust to the optimal charging current value, and there is a risk that the charging performance becomes unnecessarily low.

[0008] Therefore, an appropriate rapid charging technology that can solve such problems is required.

Summary of the Invention

Problems to be Solved by the Invention

[0009] An object of the present invention for solving the above problems is to provide a battery charging control device capable of improving charging performance and charging safety.

[0010] Another object of the present invention for solving the above problems is to provide a battery charging control method by such a battery charging control device.

Means for Solving the Problems

[0011] A battery charging control device according to an embodiment of the present invention for achieving the above object may include at least one processor; and a memory storing at least one instruction executed through the at least one processor.

[0012] At least one of the above commands may include a command to check the current temperature value, the current state of charge value, and the initial state of charge value at the start of charging of the battery; a command to check the temperature correction value stored corresponding to the current state of charge value and the initial state of charge value; a command to correct the current temperature value based on the checked temperature correction value; and a command to determine a charging current value for charging the battery based on the corrected current temperature value and the current state of charge value.

[0013] The command to check the temperature correction value may include a command to check the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each interval for the initial state of charge value and each interval for the current state of charge value.

[0014] The temperature correction value may be defined based on the temperature difference value between the first position and the second position of the battery.

[0015] The first position is the position where a temperature sensor for measuring the temperature value of the battery is arranged, and the second position may correspond to a position where the distance from the cooling unit is relatively closer than the first position.

[0016] The temperature correction map may be predefined based on the temperature difference value measured between the first position and the second position for each interval for the initial state of charge and each interval for the current state of charge.

[0017] At least one of the above commands may further include a command to check the cooling performance value of a cooling unit for cooling the battery. Here, the command to check the temperature correction value may include a command to check the temperature correction value stored corresponding to the current state of charge value, the initial state of charge value, and the cooling performance value.

[0018] The command to check the temperature correction value may include a command to check the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each interval for the initial state of charge value, each interval for the current state of charge value, and each interval for the cooling performance value.

[0019] The command to correct the current temperature value may include a command to correct the current temperature value by subtracting the confirmed temperature correction value from the current temperature value.

[0020] The command to determine the charging current value may include a command to check the charging current value corresponding to the corrected current temperature value and the current charging state value in a charging map in which the charging current value is predefined for each interval for the temperature value and each interval for the charging state value.

[0021] A battery charging control method by a battery charging control device according to an embodiment of the present invention for achieving another object includes steps of checking a current temperature value, a current charging state value, and an initial charging state value at the start of charging of a battery; checking a temperature correction value stored corresponding to the current charging state value and the initial charging state value; a command to correct the current temperature value based on the confirmed temperature correction value; and a step of determining a charging current value for charging the battery based on the corrected current temperature value and the current charging state value.

[0022] The step of checking the temperature correction value may include a step of checking the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each interval for the initial charging state value and each interval for the current charging state value.

[0023] The temperature correction value may be defined based on a temperature difference value between a first position and a second position of the battery.

[0024] The first position is a position where a temperature sensor for measuring the temperature value of the battery is arranged, and the second position may correspond to a position where the distance from the cooling unit is relatively closer than the first position.

[0025] The temperature correction map may be predefined based on the measured temperature difference value between the first position and the second position for each interval for the initial charging state and each interval for the current charging state.

[0026] The above battery charging control method may further include a step of checking a cooling performance value of a cooling unit that cools the above battery. Here, the step of checking the above temperature correction value may include a step of checking a temperature correction value stored corresponding to the above current charge state value, the above initial charge state value, and the above cooling performance value.

[0027] The step of checking the above temperature correction value may include a step of checking the above temperature correction value using a temperature correction map in which temperature correction values are predefined for each section for the initial charge state value, each section for the current charge state value, and each section for the cooling performance value.

[0028] The step of correcting the above current temperature value may include a step of subtracting the above confirmed temperature correction value from the above current temperature value to correct the above current temperature value.

[0029] The step of determining the above charge current value may include a step of checking a charge current value corresponding to the above corrected current temperature value and the current charge state value in a charge map in which charge current values are predefined for each section for the temperature value and each section for the charge state value.

Advantages of the Invention

[0030] According to the embodiment of the present invention as described above, by determining the charge current value using the optimal temperature correction value corresponding to the charge state value at the start of charging, the charging performance and charging safety can be improved.

Brief Description of the Drawings

[0031]

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Embodiments for Carrying Out the Invention

[0032] The present invention can be subject to various modifications and can have various embodiments. Therefore, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but it should be understood that it includes all modifications, equivalents, or alternatives included in the spirit and technical scope of the present invention. Similar reference numerals are used for similar components while explaining each drawing.

[0033] Terms such as first, second, A, B, etc. can be used to describe various components, but the above components should not be limited by the above terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the rights of the present invention, the first component can be named the second component, and similarly, the second component can also be named the first component. The term "and / or" includes a combination of a plurality of relatedly described items or one of a plurality of relatedly described items.

[0034] When it is mentioned that a certain component is "connected" or "attached" to another component, it should be understood that it may be directly connected or attached to the other component, but there may also be other components in between. In contrast, when it is mentioned that a certain component is "directly connected" or "directly attached" to another component, it should be understood that there are no other components in between.

[0035] The terms used in this application are merely used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "including" or "having" are intended to specify the presence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and it should be understood that the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

[0036] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. Terms defined as in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted as having an ideal or overly formal meaning unless clearly defined in this application.

[0037] Some of the terms used in this specification are defined as follows.

[0038] A battery cell is the smallest unit that serves to store electrical energy, and a battery module means an assembly in which a plurality of battery cells are electrically connected.

[0039] A battery pack or a battery rack refers to a single-structured system that can be electrically connected in module units set by a battery manufacturer and monitored and controlled through a BMS (Battery Management System), and can be configured to include a plurality of battery modules and one BPU (Battery Protection Unit) or a protection device.

[0040] A battery bank can mean a collection of large-scale battery rack systems configured by connecting a plurality of battery racks in parallel. Through the BMS at the battery bank unit, monitoring and control of the rack BMS (RBMS) at the battery rack unit can be performed.

[0041] A battery assembly is composed of a plurality of electrically connected battery cells and means an aggregate that is applied to a specific system or device and functions as a power supply. Here, the battery assembly can mean a battery module, a battery pack, a battery rack, or a battery bank, etc., but the scope of the present invention is not limited to these individuals.

[0042] SOC (State of Charge; charge rate) represents the current charged state of the battery as a percentage [%], and SOH (State of Health; remaining rate) represents the current remaining state of the battery as a percentage [%].

[0043] Figure 1 is a reference table for explaining a general rapid charging method.

[0044] The charging current value of the battery can be determined by a pre-stored charging map. Here, the charging map can be embodied in a table in which the charging current values for different SOC intervals and temperature intervals are predefined, or a table in which the charging current values for different voltage intervals and temperature intervals are predefined. Generally, the charging current value can be defined as a value that decays step by step as the charging state value (e.g., SOC value or voltage value) of the battery increases.

[0045] If the battery system is switched to the charging mode, the battery charging control device checks the charging current value corresponding to the current state of charge value (SOC value or voltage value) and the current temperature value of the battery in the charging map stored in the storage device, and can control the charging device so that the battery is charged with the confirmed charging current value.

[0046] In the case of rapid charging, since charging proceeds at a relatively high current compared to a general charging method, temperature variations may occur between battery cells. For example, in the case of a battery module including a plurality of battery cells, significant temperature variations may occur between the upper part of the battery cell located in the center and the lower part of the battery cell located on the outer surface. Such temperature variations may be caused by differences in the cooling efficiency of the cooling unit disposed on the lower surface of the battery module.

[0047] At this time, considering the characteristics of the battery in which the lithium precipitation limit point changes depending on the temperature, it is preferable that the charging current value is determined based on the lowest temperature among the temperatures of the battery cells. However, in the case of a battery assembly in which it is difficult to arrange a plurality of temperature sensors due to the design structure, it may be difficult to confirm the temperature variation value in real time and determine the charging current value. To solve such problems, a temperature estimation method or a temperature correction method can be utilized.

[0048] First, according to the temperature estimation method, the battery charging control device estimates the lowest temperature of the battery cells using a predefined temperature estimation algorithm, checks the charging current value corresponding to the estimated temperature value in the charging map, and proceeds with charging. However, since such a temperature estimation method must use a complex temperature estimation algorithm, the efficiency in terms of data processing decreases, resulting in limitations in controlling charging quickly.

[0049] Next, according to the temperature correction method, the battery charging control device corrects the temperature measurement value measured at a specific point to the minimum temperature value using a pre-stored temperature correction map, and checks the charging current value corresponding to the corrected temperature value in the charging map to proceed with charging. Here, as shown in FIG. 1, the temperature correction map can be embodied in a table in which temperature correction values are predefined for each SOC section. That is, the battery charging control device can correct the current temperature value using the temperature correction value corresponding to the current SOC in the temperature correction map, and check the charging current value corresponding to the current SOC and the corrected temperature value in the charging map to proceed with charging.

[0050] Generally, the temperature correction value can be defined as the temperature difference value between the temperature sensing point and the lowest temperature point measured through pre-experiments. Here, the pre-experiment for constructing the temperature correction map is carried out in such a way that after starting charging when the battery has the lowest SOC value, the temperature difference value for each SOC section is measured until charging is completed. When rapid charging is carried out using the temperature correction value calculated in such a way, although the charging safety is excellent, there may be a limit to the charging performance. Specifically, such a temperature correction map is derived on the premise of the situation (worst case) where charging proceeds from the lowest SOC section in consideration of charging safety, and the temperature correction value can be defined as an unnecessarily large value. As a result, even when there is no need to reduce the charging current, the charging speed may be unnecessarily limited and the charging time may be delayed.

[0051] FIG. 2 is a block diagram for explaining a battery charging system according to an embodiment of the present invention.

[0052] Referring to FIG. 2, the battery charging system can be configured to include a battery assembly 100 including a plurality of batteries 10 and a battery charging control device 200.

[0053] In the present invention, the battery assembly 100 can be configured to be included in an electric mobile means such as an electric vehicle, but the scope of the present invention is not limited to these individuals.

[0054] A plurality of batteries 10 can be electrically connected to each other to form a battery assembly.

[0055] The battery charging control device 200 can be configured in conjunction with the battery assembly 100 and the battery charging device. Here, the battery charging control device 200 can determine a charging current for charging the battery and control the battery charging device so that the battery is charged with the determined charging current.

[0056] Here, the charging current determined by the battery charging control device 200 can mean the charging current applied to the battery assembly 100 or the charging current applied to the individual battery 10.

[0057] The battery charging control device 200 can include a battery state information collection device that senses the state value of the battery or can be configured to be connected to the battery state information collection device. Here, the state value of the battery can include the voltage value, current value, temperature value, and SOC value of the battery.

[0058] The battery charging control device 200 can be configured to be included in the battery system or can be configured to be included in the battery charging device. For example, the battery charging control device 200 can be embodied as being included in the BMS located inside the battery system or can be embodied as being included in the control system of the rapid charger for the battery.

[0059] FIG. 3 is an operation flowchart of the battery charging control method according to an embodiment of the present invention. On the other hand, the battery charging control method according to an embodiment of the present invention can be performed in the rapid charging mode, but can also be performed in the general charging mode if necessary.

[0060] In the charging mode, the battery charging control device can check the current temperature value, the current charging state value, and the initial charging state value at the start of charging of the battery (S310). Here, the charging state value is a value indicating the charging degree of the battery and can include one or more of the SOC value and the voltage value.

[0061] Specifically, the battery charge control device can receive the current temperature value of the battery from a temperature sensor provided at a specific location of the battery. Further, the battery charge control device can receive the current voltage value of the battery from a voltage sensor of the battery or estimate the current SOC value of the battery based on the current voltage value of the battery using a predefined SOC estimation algorithm. Also, the battery charge control device can check the initial charge state value of the battery (e.g., the SOC value or voltage value at the start of charging) pre-stored in the storage device.

[0062] Thereafter, the battery charge control device can check the temperature correction value stored corresponding to the current charge state value and the initial charge state value confirmed in S310 (S320). Here, the battery charge control device can check the temperature correction value using the pre-stored temperature correction map.

[0063] In an embodiment, the temperature correction map can include data in which temperature correction values are predefined for each interval for the initial charge state value and each interval for the current charge state value.

[0064] FIG. 4 is an illustration of a temperature correction map according to an embodiment of the present invention. Referring to FIG. 4, the temperature correction map can be embodied in a table in which temperature correction values are defined for each interval for the SOC value at the start of charging (SOC_init) and each interval for the current SOC value (SOC_p). Here, each of the temperature correction values can correspond to the temperature difference value between the temperature sensing location and the lowest temperature location measured for each interval for the initial SOC and each interval for the current SOC through a pre-experiment.

[0065] Referring to FIG. 3 again, the battery charge control device can correct the current temperature value based on the temperature correction value confirmed in S320 (S330). Here, the battery charge control device can correct the current temperature value by subtracting the temperature correction value from the current temperature value.

[0066] For example, when the SOC of the battery at the start of charging is 15 and the current SOC value of the battery is 40, the temperature correction value can be determined to be 5. Here, when the current temperature value of the battery is 25, the battery charging control device can correct the current temperature value of the battery from 25 to 20 (=25 - 5).

[0067] As another example, when the SOC of the battery at the start of charging is 25 and the current SOC value of the battery is 40, the temperature correction value can be determined to be 2. Here, when the current temperature value of the battery is 25, the battery charging control device can correct the current temperature value of the battery from 25 to 23 (=25 - 2).

[0068] Next, the battery charging control device can determine a charging current value for charging the battery based on the currently corrected temperature value and the current charging state value in S330 (S340). Here, the battery charging control device can confirm the charging current value corresponding to the currently corrected temperature value and the current charging state value in the pre-stored charging map.

[0069] In an embodiment, the charging map can include data in which a charging current value is predefined for each interval for the temperature value and each interval for the charging state value.

[0070] FIG. 5 is an illustration of a charging map according to an embodiment of the present invention. Referring to FIG. 5, the charging map can be embodied in a table in which a charging current value is predefined for each SOC interval and each temperature interval. Here, the charging current value can be defined as a current value (A) or a charging rate (C-rate). On the other hand, the charging map can also be embodied in a table in which a charging current value is predefined for each voltage interval and each temperature interval, different from FIG. 5.

[0071] Referring to FIG. 3 again, the battery charging control device can control the battery charging device so that the battery is charged with the charging current value determined in S340 (S350).

[0072] The temperature variation among battery cells can vary depending on the state of charge at the start of charging. For example, even when the batteries have the same SOC value, if charging starts in a state with a high SOC, the temperature variation among the battery cells can be lower than when charging starts in a state with a relatively low SOC. The battery charge control device according to the present invention can correct the current temperature value based on the optimal temperature correction value corresponding to the initial state of charge value at the start of charging, and determine the charging current value based on the corrected temperature value. According to the present invention, a complex data processing process is unnecessary, the data processing efficiency is improved, and the charging safety and charging performance can be improved by determining the charging current based on a more accurate temperature variation value.

[0073] FIG. 6 is a reference diagram for explaining a method of constructing a temperature correction map according to an embodiment of the present invention.

[0074] The temperature correction map according to an embodiment of the present invention can be constructed through a pre-measurement experiment on the temperature difference value between the first position and the second position of the battery. Here, the first position is the position where the temperature sensor for measuring the temperature value of the battery is arranged, and the second position can correspond to a position where the distance from the cooling unit is relatively closer than the first position.

[0075] For example, referring to FIG. 6, the upper part (point A) of the battery cell located at the center of the battery module 610 is the point that shows the highest temperature during the charging process, and a temperature sensor can be arranged at point A. On the other hand, the lower part (point B) of the battery cell located on the outer surface of the battery module 610 is the point that shows the lowest temperature during the charging process due to the cooling effect of the cooling unit 620. However, due to the expansion problem of the battery cell, a temperature sensor cannot be arranged at point B.

[0076] In order to construct a temperature correction map according to the present invention, a pre-measurement experiment can be conducted on the temperature difference value between point A and point B. Specifically, temperature sensors can be arranged at each of point A (the first position) and point B (the second position), and the initial SOC value, the SOC value confirmed during the charging process, and the temperature difference value between point A and point B measured during the charging process can be collected. Then, based on the collected data, a temperature correction map in which temperature correction values are defined for each interval with respect to the initial SOC value and each interval with respect to the current SOC value can be constructed.

[0077] The temperature correction map constructed through such a pre-experiment can be stored in the storage device of the battery charging control device. Then, during the battery charging process, the battery charging control device corrects the current temperature value collected through the temperature sensor arranged at the first position using the previously stored temperature correction map, and can determine the charging current value based on the corrected temperature value.

[0078] FIG. 7 is a reference diagram for explaining a battery charging control method according to another embodiment of the present invention.

[0079] In the charging mode, the battery charging control device can confirm the current temperature value of the battery, the current charging state value, the initial charging state value at the start of charging, and the cooling performance value of the cooling unit (S710). Here, the cooling performance value is a value indicating the degree of cooling by the cooling unit, and for example, it can correspond to the power value (W) supplied to the cooling unit. On the other hand, the battery charging control device can be configured to confirm the cooling performance value of the cooling unit in conjunction with the control device of the cooling unit.

[0080] Thereafter, the battery charging control device can confirm the temperature correction value stored corresponding to the current charging state value, the initial charging state value, and the cooling performance value confirmed in S710 (S720). Here, the battery charging control device can confirm the temperature correction value using the previously stored temperature correction map.

[0081] In an embodiment, the temperature correction map can include data in which temperature correction values are predefined for each interval for the initial state of charge value, the current state of charge value, and the cooling performance value.

[0082] FIG. 8 is an illustration of a temperature correction map according to another embodiment of the present invention. Referring to FIG. 8, the temperature correction map can be embodied in a table in which temperature correction values are defined for each interval for the initial SOC value (SOC_init), the current SOC value (SOC_p), and the cooling performance value (W). Here, each of the temperature correction values can correspond to a temperature difference value between the temperature sensing point and the lowest temperature point measured for each interval for the initial SOC, the current SOC, and the cooling performance value (W) through prior experiments.

[0083] Referring to FIG. 7 again, the battery charge control device can correct the current temperature value based on the temperature correction value confirmed in S720 (S730). Here, the battery charge control device can correct the current temperature value by subtracting the temperature correction value from the current temperature value.

[0084] For example, when the SOC of the battery at the start of charging is 15, the current SOC value of the battery is 40, and the cooling performance value is 250, the temperature correction value can be determined to be 6. Here, when the current temperature value of the battery is 25, the battery charge control device can correct the current temperature value of the battery from 25 to 19 (=25 - 6).

[0085] As another example, when the SOC of the battery at the start of charging is 25, the current SOC value of the battery is 40, and the cooling performance value is 350, the temperature correction value can be determined to be 4. Here, when the current temperature value of the battery is 25, the battery charge control device can correct the current temperature value of the battery from 25 to 21 (=25 - 4).

[0086] Next, the battery charging control device can determine a charging current value for charging the battery based on the current temperature value and the current state of charge value corrected in S730 (S740). Here, the battery charging control device can check the charging current value corresponding to the current temperature value and the current state of charge value corrected by the pre-stored charging map.

[0087] Thereafter, the battery charging control device can control the battery charging device so that the battery is charged with the charging current value determined in S740 (S750).

[0088] The temperature variation between battery cells can vary depending on the degree of charge at the start of charging and the performance of the cooling unit. For example, even when the battery has the same SOC value, if the output of the cooling unit is high, the temperature variation between battery cells can be larger than in the case where the output of the cooling unit is low. The battery charging control device according to the present invention can more precisely correct the current temperature value based on not only the initial state of charge value at the start of charging but also the performance of the cooling unit, and can determine the charging current value based on the corrected temperature value.

[0089] FIG. 9 is an operation flowchart of a battery charging control method according to another embodiment of the present invention.

[0090] When the rapid charging mode for the battery is started, the battery charging control device can check the current temperature value, the current state of charge value, and the initial state of charge value at the start of charging of the battery (S910). Here, since the current state of charge value corresponds to the initial state of charge value, the battery charging control device can store the current state of charge value in the storage device as the initial state of charge value.

[0091] The battery charging control device can check the temperature correction value stored corresponding to the current state of charge value and the initial state of charge value checked in S910 (S920). Here, the battery charging control device can check the temperature correction value using the pre-stored temperature correction map.

[0092] The battery charging control device can determine a charging current value for charging the battery based on the current temperature value and the current charge state value corrected at S930 (S940). Here, the battery charging control device can confirm the charging current value corresponding to the current temperature value and the current charge state value corrected by the stored charging map.

[0093] The battery charging control device can control the battery charging device so that the battery is charged with the charging current value determined at S940 (S950).

[0094] The battery charging control device can check (S960) whether the battery satisfies a predefined charging completion condition. For example, the battery charging control device can determine whether charging is complete based on whether the battery has reached a predefined full charge voltage.

[0095] If charging is not complete, the battery charging control device can return to S910 to check the current temperature value, the current charge state value, and the stored initial charge state value of the battery. Thereafter, the battery charging control device can control the charging while gradually updating the charging current value using the temperature correction map and the charging map until charging is complete.

[0096] FIG. 10 is a block diagram of a battery charging control device according to an embodiment of the present invention.

[0097] The battery charging control device 1000 according to an embodiment of the present invention can be configured to be included in a battery system or included in a battery charging device. For example, the battery charging control device 1000 can be embodied as being included in a BMS located inside the battery system or included in a control system of a rapid charger for the battery.

[0098] The battery charging control device 1000 can include at least one processor 1010, a memory 1020 that stores at least one instruction executed through the processor, and a transceiver 1030 that is connected to a network and communicates.

[0099] At least one of the above commands can include a command to check the current temperature value, the current state of charge value, and the initial state of charge value at the start of charging of the battery; a command to check the temperature correction value stored corresponding to the current state of charge value and the initial state of charge value; a command to correct the current temperature value based on the confirmed temperature correction value; and a command to determine a charging current value for charging the battery based on the corrected current temperature value and the current state of charge value.

[0100] The command to check the temperature correction value can include a command to check the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each interval for the initial state of charge value and each interval for the current state of charge value.

[0101] The temperature correction value can be defined based on the temperature difference value between the first position and the second position of the battery.

[0102] The first position is the position where the temperature sensor for measuring the temperature value of the battery is arranged, and the second position can correspond to a position where the distance from the cooling unit is relatively closer than the first position.

[0103] The temperature correction map can be predefined based on the temperature difference value measured between the first position and the second position for each interval for the initial state of charge and each interval for the current state of charge.

[0104] At least one of the above commands can further include a command to check the cooling performance value of the cooling unit for cooling the battery. Here, the command to check the temperature correction value can include a command to check the temperature correction value stored corresponding to the current state of charge value, the initial state of charge value, and the cooling performance value.

[0105] The instruction to check the temperature correction value can include an instruction to check the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each interval for the initial charge state value, the interval for the current charge state value, and the interval for the cooling performance value.

[0106] The instruction to correct the current temperature value can include an instruction to subtract the confirmed temperature correction value from the current temperature value to correct the current temperature value.

[0107] The instruction to determine the charging current value can include an instruction to check the charging current value corresponding to the corrected current temperature value and the current charge state value in a charging map in which the charging current value is predefined for each interval for the temperature value and the interval for the charge state value.

[0108] The battery charging control device 1000 can further include an input interface device 1040, an output interface device 1050, a storage device 1060, etc. Each component included in the battery charging control device 1000 can be connected by a bus 1070 and communicate with each other.

[0109] Here, the processor 1010 can mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor in which the method according to the embodiments of the present invention is performed. The memory (or storage device) can be composed of at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory can be composed of at least one of a read only memory (ROM) and a random access memory (RAM).

[0110] The operation of the method according to an embodiment of the present invention can be embodied as a computer-readable program or code on a computer-readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Also, the computer-readable recording medium can be distributed over a computer system connected by a network, and a computer-readable program or code can be stored and executed in a distributed manner.

[0111] Some aspects of the present invention have been described in the context of an apparatus, which can also represent corresponding method descriptions, where a block or apparatus corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method can be represented by corresponding blocks or items or features of a corresponding apparatus. Some or all of the method steps can be performed by (or using) a hardware device such as a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, one or more of the most important method steps can be performed by such a device.

[0112] Although the preferred embodiments of the present invention have been described above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the present invention described in the following claims.

Description of Reference Numerals

[0113] 10: Battery 100: Battery Assembly 200, 1000: Battery Charging Control Device 610: Battery Module 620: Cooling Unit

Claims

1. At least one processor; and A memory for storing at least one instruction executed through the at least one processor; including The at least one instruction Instructions for checking the current temperature value, the current charge state value, and the initial charge state value at the start of charging of the battery; Instructions for checking the temperature correction value stored corresponding to the current charge state value and the initial charge state value; Instructions for correcting the current temperature value based on the checked temperature correction value; and Instructions for determining a charging current value for charging the battery based on the corrected current temperature value and the current charge state value, A battery charging control device.

2. The instructions for checking the temperature correction value Include instructions for checking the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each interval for the initial charge state value and each interval for the current charge state value, The battery charging control device according to Claim 1.

3. The temperature correction value Is defined based on the temperature difference value between the first position and the second position of the battery, The battery charging control device according to Claim 2.

4. The first position is the position where a temperature sensor for measuring the temperature value of the battery is arranged, The second position is a position where the distance from the cooling unit is relatively closer than the first position, The battery charging control device according to Claim 3.

5. The temperature correction map Is predefined based on the temperature difference value measured between the first position and the second position for each interval for the initial charge state and each interval for the current charge state, The battery charging control device according to Claim 3.

6. The at least one instruction Further includes instructions for checking the cooling performance value of a cooling unit for cooling the battery, The instructions for checking the temperature correction value Include instructions for checking the temperature correction value stored corresponding to the current charge state value, the initial charge state value, and the cooling performance value, The battery charging control device according to Claim 1.

7. The instructions for checking the temperature correction value Include instructions for checking the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each interval for the initial charge state value, each interval for the current charge state value, and each interval for the cooling performance value, The battery charging control device according to Claim 6.

8. The instructions for correcting the current temperature value Include instructions for subtracting the checked temperature correction value from the current temperature value to correct the current temperature value, The battery charging control device according to Claim 1.

9. The instruction for determining the charging current value includes an instruction for checking the charging current value corresponding to the corrected current temperature value and the current state of charge value in a charging map in which the charging current value is predefined for each section with respect to the temperature value and each section with respect to the state of charge value. The battery charging control device according to claim 1.

10. A battery charging control method by a battery charging control device, comprising: a step of checking the current temperature value, the current state of charge value of the battery, and the initial state of charge value at the start of charging; a step of checking the temperature correction value stored corresponding to the current state of charge value and the initial state of charge value; an instruction to correct the current temperature value based on the checked temperature correction value; and a step of determining a charging current value for charging the battery based on the corrected current temperature value and the current state of charge value. A battery charging control method.

11. The step of checking the temperature correction value includes a step of checking the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each section with respect to the initial state of charge value and each section with respect to the current state of charge value. The battery charging control method according to claim 10.

12. The temperature correction value is defined based on the temperature difference value between the first position and the second position of the battery. The battery charging control method according to claim 11.

13. The first position is the position where a temperature sensor for measuring the temperature value of the battery is disposed, and the second position is a position where the distance from the cooling unit is relatively closer than the first position. The battery charging control method according to claim 12.

14. The temperature correction map is predefined based on the temperature difference value measured between the first position and the second position for each section with respect to the initial state of charge and each section with respect to the current state of charge. The battery charging control method according to claim 12.

15. further includes a step of checking the cooling performance value of a cooling unit for cooling the battery, and the step of checking the temperature correction value includes a step of checking the temperature correction value stored corresponding to the current state of charge value, the initial state of charge value, and the cooling performance value. The battery charging control method according to claim 10.

16. The step of checking the temperature correction value includes a step of checking the temperature correction value using a temperature correction map in which the temperature correction value is predefined for each section with respect to the initial state of charge value, each section with respect to the current state of charge value, and each section with respect to the cooling performance value. The battery charging control method according to claim 15.

17. The step of correcting the current temperature value includes the step of subtracting the confirmed temperature correction value from the current temperature value to correct the current temperature value. The battery charging control method according to claim 10.

18. The step of determining the charging current value includes the step of checking the charging current value corresponding to the corrected current temperature value and the current charging state value in a charging map in which the charging current value is predefined for each section for the temperature value and each section for the charging state value. The battery charging control method according to claim 10.

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