KR-102961925-B1 - BATTERY MANAGEMENT APPARATUS, BATTERY MANAGEMENT METHOD AND BATTERY MANAGEMENT SYSTEM

KR102961925B1KR 102961925 B1KR102961925 B1KR 102961925B1KR-102961925-B1

Abstract

According to some embodiments, the battery management device comprises: a data acquisition unit configured to acquire battery data from a multi-pack battery including a main battery pack and one or more sub-battery packs; and a control unit configured to select an auxiliary battery pack among the remaining battery packs excluding a target battery pack from the multi-pack battery based on the battery data, distribute charge/discharge inputs to the target battery pack and the auxiliary battery pack to apply a target charge/discharge profile to the target battery pack, and calculate an internal resistance of the target battery pack based on the electrical response of the target battery pack to the target charge/discharge profile.

Inventors

최연식
이정훈
이병규

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260507
Application Date: 20240509

Claims (14)

A data acquisition unit configured to acquire battery data from a multi-pack battery including a main battery pack and one or more sub-battery packs; and Based on the above battery data, an auxiliary battery pack is selected from among the remaining battery packs excluding the target battery pack in the above multi-pack battery, and Generates charge/discharge inputs based on whether the battery charger is connected to the multi-pack battery, and The above charge/discharge input is distributed to the target battery pack and the auxiliary battery pack to apply a target charge/discharge profile to the target battery pack, and A battery management device comprising a control unit configured to calculate the internal resistance of the target battery pack based on the electrical response of the target battery pack to the target charge/discharge profile.
In paragraph 1, The control unit distributes the charging current to the target battery pack and the auxiliary battery pack to generate a charging current profile for the target battery pack, and A battery management device configured to distribute a discharge current to the target battery pack and the auxiliary battery pack to generate a discharge current profile for the target battery pack.
delete
In paragraph 1, A battery management device, wherein the control unit is configured to generate the charge/discharge input based on the charge/discharge of the battery charger when the battery charger is connected to the multi-pack battery.
In paragraph 1, The control unit selects a source battery pack among the remaining battery packs, excluding the target battery pack and the auxiliary battery pack, based on the battery data when the battery charger is not connected to the multi-pack battery, and A battery management device configured to generate the charge/discharge input based on the charge/discharge of the source battery pack.
In paragraph 1, A battery management device, wherein the above control unit is further configured to correct the state of health (SOH) of the target battery pack based on the internal resistance.
In paragraph 1, The above control unit initiates the process of calculating the internal resistance when there is a user manual setting, and If there is no manual user setting as described above, a suggestion message is sent to the user terminal based on a timer regarding the non-use time of the multi-pack battery, and A battery management device configured to initiate the process of calculating the internal resistance when there is user consent to the above proposal message.
A step of obtaining battery data from a multi-pack battery including a main battery pack and one or more sub-battery packs; A step of selecting an auxiliary battery pack among the remaining battery packs excluding the target battery pack from the multi-pack battery based on the battery data above; A step of generating a charge/discharge input based on whether the battery charger is connected to the multi-pack battery; A step of distributing the charge/discharge input to the target battery pack and the auxiliary battery pack to apply a target charge/discharge profile to the target battery pack; and A battery management method comprising the step of calculating the internal resistance of the target battery pack based on the electrical response of the target battery pack to the target charge/discharge profile.
In paragraph 8, The step of applying the above target charge/discharge profile is, A step of distributing the charging current to the target battery pack and the auxiliary battery pack to generate a charging current profile for the target battery pack; and A battery management method comprising the step of distributing the discharge current to the target battery pack and the auxiliary battery pack to generate a discharge current profile for the target battery pack.
delete
In paragraph 8, The step of applying the above target charge/discharge profile is, A battery management method comprising the step of generating the charge/discharge input based on the charge/discharge of the battery charger when the battery charger is connected to the multi-pack battery.
In paragraph 8, The step of applying the above target charge/discharge profile is, When the battery charger is not connected to the multi-pack battery, a step of selecting a source battery pack among the remaining battery packs, excluding the target battery pack and the auxiliary battery pack from the multi-pack battery based on the battery data; and A battery management method comprising the step of generating the charge/discharge input based on the charge/discharge of the source battery pack.
In paragraph 8, A battery management method further comprising the step of correcting the state of health (SOH) of the target battery pack based on the internal resistance.
In paragraph 8, The step of calculating the internal resistance above is, A step of initiating the process of calculating the internal resistance above if there is a user manual setting; If there is no user manual setting, the step of transmitting a suggestion message to a user terminal based on a timer regarding the non-use time of the multi-pack battery; and A battery management method comprising the step of initiating a process for calculating the internal resistance when there is user consent to the above proposal message.

Description

Battery Management Apparatus, Battery Management Method and Battery Management System The embodiments disclosed in this document relate to a battery management device, a battery management method, and a battery management system. Recently, research and development on secondary batteries has been actively underway. Here, secondary batteries are rechargeable batteries and can be interpreted to encompass conventional Ni/Cd and Ni/MH batteries, as well as the more recent lithium-ion batteries. Among secondary batteries, lithium-ion batteries can possess higher energy density compared to conventional Ni/Cd and Ni/MH batteries, and because they can be manufactured in a compact and lightweight form factor, they offer high utility as power sources for mobile devices. Recently, their scope of application has expanded to include power sources for electric vehicles, drawing attention as a next-generation energy storage medium. To power electric vehicles, a multi-pack battery structure comprising one traction battery pack and one or more extender battery packs may be utilized. The internal resistance value of the battery pack may be required to estimate the state of health (SOH). Internal resistance can be measured by measuring and analyzing electrical responses, such as current or voltage, during the charging and discharging process of the battery pack. When only a single battery pack is used, a separate charging and discharging device providing charge and discharge inputs with a defined pattern may be required to measure the internal resistance. FIG. 1 illustrates elements constituting a battery management system according to some embodiments. FIG. 2 illustrates elements constituting a battery management device according to some embodiments. FIG. 3 illustrates the structure of a multi-pack battery according to some embodiments. FIG. 4 illustrates the process of initiating the task of calculating the internal resistance of a battery pack in a multi-pack battery according to some embodiments. FIG. 5 illustrates a process of selecting a source battery pack according to some embodiments and calculating internal resistance. FIG. 6 illustrates a method of applying a charging current profile to a target battery pack using an auxiliary battery pack according to some embodiments. FIG. 7 illustrates a method of applying a discharge current profile to a target battery pack using an auxiliary battery pack according to some embodiments. FIG. 8 illustrates steps constituting a battery management method according to some embodiments. Hereinafter, embodiments described in this document are described with reference to the accompanying drawings. However, this is not intended to limit the disclosure of this document to specific embodiments and should be understood to include various modifications, equivalents, and/or alternatives to the embodiments described in this document. The embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, each of the phrases such as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “at least one of A, B, or C” may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as “first,” “second,” “first,” “second,” “A,” “B,” “(a),” or “(b)” may be used simply to distinguish a component from another component and, unless specifically stated otherwise, do not limit the components in any other aspect (e.g., importance or order). In this document, where it is stated that any (e.g., 1) component is "connected," "coupled," or "joined" to another (e.g., 2) component, with or without the terms "functionally" or "communicationly," or where it is stated that the component is "coupled" or "connected," it means that the component may be connected to the other component directly (e.g., by wire or wirelessly) or indirectly (e.g., through a 3) component. Methods according to the various embodiments disclosed in this document may be provided as part of a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory, CD-ROM) or distributed online (e.g., download or upload) through an application store or directly between two driver devices. In the case of online distribution, at least a portion of the computer program product may be