KR-20260066296-A - APPARATUS AND METHOD FOR CONTROLING CHARGE OF BATTERY, BATTERY CHARGING SYSTEM INCLUDING THE SAME

KR20260066296AKR 20260066296 AKR20260066296 AKR 20260066296AKR-20260066296-A

Abstract

A battery charging control device according to an embodiment of the present invention can charge the battery by checking the maximum output current of the charging device when switched to a charging mode, and using a target charging map in which a maximum current upper limit corresponding to the magnitude of the maximum output current of the charging device is defined.

Inventors

채승민

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (15)

At least one processor; and It includes a memory that stores at least one instruction executed through the above processor, and The above at least one command is, A command to check the maximum output current of the charging device when switched to charging mode, and A battery charging control device comprising a command to charge a battery using a target charging map in which a maximum current upper limit corresponding to the magnitude of the maximum output current of the charging device is defined.
In claim 1, The command to charge the above battery is, A command to select a target charging map among a plurality of charging maps, wherein a maximum current upper limit corresponding to the magnitude of the maximum output current of the charging device is defined, and Using the above target charging map, the charge state of the battery A battery charging control device comprising a command to charge the battery with a corresponding charging current value.
In claim 2, A command to select the target charging map among the plurality of charging maps, wherein the upper limit of the maximum current corresponding to the magnitude of the maximum output current of the charging device is defined, A command to check the maximum current upper limit of each of multiple predefined charging maps for charging current values for each State of Charge (SOC) interval of the battery, and A battery charging control device comprising a command to compare the maximum current upper limits and the maximum output current of the charging device, and to select as the target charging map a charging map in which the smallest maximum current upper limit among the maximum current upper limits having a size greater than or equal to the maximum output current is defined.
In claim 2, A command to charge the battery with a magnitude of a charging current value corresponding to the charge state of the battery is, A command to check the charging current value corresponding to the charging state of the battery in the target charging map based on the charging state of the battery, and A battery charging control device comprising a command to charge the battery by adjusting the magnitude of the charging current supplied from the charging device to a magnitude corresponding to the charging current value.
In claim 4, A command to check the charging current value corresponding to the charging state of the battery in the target charging map based on the charging state of the battery is, A command to check the real-time SOC of the above battery, A command to check real-time temperature information of the above battery, and A battery charging control device comprising a command to check the charging current value defined in the section to which the real-time SOC and the temperature information belong in the above target charging map.
In claim 5, The charging current value predefined in the above target charging map is, As the battery's SOC value increases, it increases, and A battery charging control device that increases as the battery temperature information decreases.
In claim 1, The above at least one command is, A command to monitor the real-time charging status of the above battery, and A battery charging control device further comprising a command to charge the battery with a charging current of a size corresponding to the changed charging current value when the charging current value in the target charging map changes according to a change in the real-time charging state of the battery.
When switched to charging mode, a step of checking the maximum output current of the charging device; and A battery charging control method comprising the step of charging a battery using a target charging map in which a maximum current upper limit corresponding to the magnitude of the maximum output current of the charging device is defined.
In claim 8, The step of charging the above battery is, A step of selecting a target charging map among a plurality of charging maps, wherein a maximum current upper limit corresponding to the magnitude of the maximum output current of the charging device is defined; and Using the above target charging map, the charge state of the battery A battery charging control method comprising the step of charging the battery with a corresponding charging current value.
In claim 9, The step of selecting the target charging map among the plurality of charging maps, wherein the upper limit of the maximum current corresponding to the magnitude of the maximum output current of the charging device is defined, is: A step of verifying the maximum current upper limit of each of a plurality of charging maps in which the charging current values for each State of Charge (SOC) interval of the battery are predetermined; and A battery charging control method comprising the step of comparing the maximum current upper limits and the maximum output current of the charging device, and selecting as the target charging map a charging map in which the smallest maximum current upper limit among the maximum current upper limits having a size greater than or equal to the maximum output current is defined.
In claim 9, The step of charging the battery with a charging current value corresponding to the charge state of the battery is as follows: A step of determining the charging current value corresponding to the charging state of the battery in the target charging map based on the charging state of the battery; and A battery charging control method comprising the step of adjusting the magnitude of the charging current supplied from the charging device to a magnitude corresponding to the charging current value to charge the battery.
In claim 11, Based on the charge state of the battery, the step of determining the charge current value corresponding to the charge state of the battery in the target charge map is: A step of checking the real-time SOC of the above battery; A step of checking real-time temperature information of the above battery; and A battery charging control method comprising the step of checking the charging current value defined in the interval to which the real-time SOC and the temperature information belong in the target charging map above.
In claim 11, The charging current value predefined in the above target charging map is, As the battery's SOC value increases, it increases, and A battery charging control method that increases as the battery temperature information decreases.
In claim 8, A step of monitoring the real-time charging status of the above battery; and A battery charging control method further comprising the step of charging the battery with a charging current of a size corresponding to the changed charging current value when the charging current value in the target charging map changes according to a change in the real-time charging state of the battery.
battery; A charging device that supplies a charging current to the above battery; and It includes a battery management device that manages the above battery, and The above battery management device is, When switched to charging mode, check the maximum output current of the charging device, and A battery charging system that charges the battery using a target charging map in which a maximum current upper limit corresponding to the magnitude of the maximum output current of the charging device is defined.

Description

Battery charging control apparatus and method, and battery charging system including the same The present invention relates to a battery charging control device and method, and a battery charging system including the same. More specifically, the invention relates to a battery charging control device and method that controls the magnitude of the charging current of a battery by taking into account the maximum output current of a charging device, and a battery charging system including the same. As the price of energy sources rises due to the depletion of fossil fuels and concerns about environmental pollution intensify, the demand for secondary batteries as an eco-friendly alternative energy source is rapidly increasing. Due to their ability to be repeatedly charged and regenerated, these secondary batteries are being applied in a wide range of sectors—from small devices such as mobile phones and laptops to large-scale industries like automobiles, robots, and energy storage devices—as a response to today's environmental regulations and high oil prices. Among secondary batteries, lithium-ion batteries are gaining attention due to their advantages over nickel-based secondary batteries, such as having almost no memory effect, a low self-discharge rate, and high energy density. Conventionally, as the usage frequency of lithium batteries increases, rapid charging technology for rapid battery charging is being introduced. Conventionally, a method for rapidly charging a battery was provided by using a rapid charging map to obtain information on the magnitude of the charging current for rapid charging based on the temperature and State of Charge (SOC) of the battery to be charged. However, in conventional rapid charging, the magnitude of the charging current of the charging device is not taken into account, so even if a charging current greater than the value defined in the rapid charging map is provided, charging is possible without lithium deposition, but the charging current is limited, which has the disadvantage of reduced efficiency. FIG. 1 is a block diagram of a battery system to which an embodiment of the present invention can be applied. FIG. 2 is a block diagram of a battery charging system according to an embodiment of the present invention. FIG. 3 is a block diagram of a battery charging control device among battery charging systems according to an embodiment of the present invention. FIG. 4 is a flowchart for explaining a battery charging control method operated by a processor in a battery charging control device according to an embodiment of the present invention. FIG. 5 is a flowchart illustrating a method for selecting a target charging map among battery charging control methods according to an embodiment of the present invention. FIG. 6 is a flowchart illustrating the step of charging a battery among the battery charging control methods according to an embodiment of the present invention. FIG. 7 is a table showing a first charging map according to an embodiment of the present invention. FIG. 8 is a table showing a second charging map according to an embodiment of the present invention. FIG. 9 is a table showing a third charging map according to an embodiment of the present invention. FIG. 10 is a table showing a fourth charging map according to an embodiment of the present invention. FIG. 11 is a table comparing current charging values defined in the first charging map and the fourth charging map according to an embodiment of the present invention. The present invention is susceptible to various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Similar reference numerals have been used for similar components in the description of each drawing. Terms such as first, second, A, B, etc., may be used to describe various components, but said components shall not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and/or" includes a combination of a plurality of related described items or any of a plurality of related described items. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should b