Apparatus, system and method for managing battery

Abstract

The present disclosure relates to an apparatus, system and method for managing a battery. A battery management apparatus includes: a detection circuit for detecting state information indicating a state of a battery; and a control circuit for monitoring a state of the battery based on the state information detected via the detection circuit, and controlling a function associated with the battery based on a result of the monitoring. The control circuit is further configured to, in response to detecting that the battery is in an abnormal state during charging or discharging of the battery, open a load disconnect switch electrically connected between the battery and the power conversion device.

Description

Technical Field

[0001] Embodiments of this disclosure relate to an apparatus, system, and method for managing batteries. Background Technology

[0002] Unlike primary batteries, which are not designed for (re)charging, secondary (or rechargeable) batteries are designed to discharge and be recharged. Low-capacity secondary batteries are used in portable small electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for driving motors in hybrid and electric vehicles, as well as for storing electricity (e.g., household and / or utility-scale power storage). A secondary battery typically includes an electrode assembly containing positive and negative electrodes, a housing that houses the electrode assembly, and electrode terminals connected to the electrode assembly.

[0003] Secondary batteries can be used as battery packs comprising battery modules, in which individual battery cells (e.g., multiple individual battery cells) are connected in series and / or in parallel. Furthermore, multiple battery modules or battery packs can be connected in series / parallel to form battery racks, and multiple battery racks can be connected in parallel to form battery containers. Battery containers can be used as energy storage systems (ESS).

[0004] Energy storage systems can connect renewable energy sources with uncontrollable power output (such as wind and solar power) to the existing power grid for charging or discharging based on power consumption patterns. For example, battery energy storage systems using secondary batteries can not only stabilize system voltage and frequency, but also store surplus energy together with renewable energy generation systems (such as wind and solar power) with inconsistent power output, and can release the energy stored in the batteries to supply energy to the load.

[0005] The information disclosed in this background section is intended to enhance the understanding of the background of this disclosure, and therefore may contain information that does not constitute related (or prior art). Summary of the Invention

[0006] In energy storage systems, efficient battery management may be required. For example, by managing various aspects such as battery charging, discharging, and cell balancing, battery life can be extended, and power supply to the load can be stable. Thus, energy storage systems may include battery management devices or battery management systems (BMS).

[0007] A battery management device or battery management system can perform protective operations (e.g., protection mode or fault mode) in response to detecting an abnormal state of the battery or battery container during charging or discharging. However, a comparative battery management device or system may disconnect the DC contactor, which is electrically connected between the battery and the power conversion device (e.g., a power conversion system (PCS)), under load according to the protective operation, which could lead to performance degradation of the battery and the power conversion device. Therefore, a battery management device, system, and method that can control the disconnection of the DC contactor under no-load conditions is desirable.

[0008] Embodiments of this disclosure may relate to an apparatus, system, and method for managing batteries according to the above description.

[0009] These and other aspects and features of this disclosure will be set forth in the following description of embodiments of this disclosure, or will be readily understood from the following description of embodiments of this disclosure.

[0010] According to one or more embodiments of this disclosure, a battery management device includes: a detection circuit configured to detect state information indicating the state of a battery; and a control circuit configured to monitor the state of the battery based on the state information detected via the detection circuit, and to control functions associated with the battery based on the monitoring results. The control circuit is further configured to: disconnect a load circuit breaker electrically connected between the battery and a power conversion device in response to detecting an abnormal state of the battery during charging or discharging.

[0011] In one embodiment, the control circuit may also be configured to disconnect the DC contactor electrically connected between the battery and the load circuit breaker after the load circuit breaker is opened.

[0012] In an embodiment, the control circuit may also be configured to send a signal via a communication line to the power management device to pre-notify the disconnection of the load circuit breaker before disconnecting the load circuit breaker.

[0013] In an embodiment, the control circuit may also be configured to disconnect the load circuit breaker when a predetermined time has elapsed since the signal was sent.

[0014] According to one or more embodiments of this disclosure, a battery management system includes: a power conversion device; a power management device; a first battery container; and a battery management device. The first battery container includes: a plurality of first batteries; a first detection device configured to detect first state information indicating the state of the first battery container; a first load disconnect switch electrically connected between the plurality of first batteries and the power conversion device; and a plurality of first DC contactors, each first DC contactor electrically connected between a corresponding one of the plurality of first batteries and the first load disconnect switch. The first detection device is further configured to: disconnect the first load disconnect switch in response to detecting an abnormal state of the first battery container based on the first state information during charging or discharging of the plurality of first batteries.

[0015] In an embodiment, the battery management device may be configured to disconnect, after the first load circuit breaker is opened, the DC contactor among a plurality of first DC contactors associated with the abnormal state of the first battery container.

[0016] In an embodiment, the first detection device may also be configured to send a first signal to the battery management device indicating an abnormal state of the first battery container, and the battery management device may be configured to send a second signal to the power management device in response to receiving the first signal, pre-notifying the disconnection of the first load circuit breaker.

[0017] In an embodiment, the power management device may be configured to adjust the output of the power conversion device to be less than a predetermined value in response to receiving a second signal.

[0018] In an embodiment, the first detection device may also be configured to disconnect the first load circuit breaker when a predetermined time has elapsed since the first signal was sent.

[0019] In one embodiment, the battery management device may be included in the first battery container.

[0020] In an embodiment, the battery management system may further include a second battery container, which includes: a plurality of second batteries; a second detection device configured to detect second status information indicating the status of the second battery container; a second load circuit breaker electrically connected between the plurality of second batteries and the power conversion device; and a plurality of second DC contactors, each second DC contactor electrically connected between a corresponding one of the plurality of second batteries and the second load circuit breaker.

[0021] In an embodiment, the second detection device may also be configured to disconnect the second load circuit breaker in response to detecting that the second battery container is in an abnormal state based on second state information during the charging or discharging of the plurality of second batteries.

[0022] In an embodiment, the battery management device may be configured to disconnect, after the second load circuit breaker is opened, the DC contactor among a plurality of second DC contactors associated with the abnormal state of the second battery container.

[0023] In an embodiment, the second detection device may also be configured to send a third signal to the battery management device indicating an abnormal state of the second battery container, and the battery management device may be configured to send a fourth signal to the power management device in advance, in response to receiving the third signal, to notify the disconnection of the second load circuit breaker.

[0024] In an embodiment, the power management device may be configured to adjust the output of the power conversion device to be less than a predetermined value in response to receiving a fourth signal.

[0025] In an embodiment, the second detection device may also be configured to disconnect the second load circuit breaker when a predetermined time has elapsed since the third signal was sent.

[0026] According to one or more embodiments of this disclosure, a method for managing a battery includes: detecting state information indicating the state of the battery; monitoring the state of the battery based on the state information; and disconnecting a load circuit breaker electrically connected between the battery and a power conversion device in response to detecting that the battery is in an abnormal state during charging or discharging of the battery.

[0027] In an embodiment, the method may further include: disconnecting the DC contactor electrically connected between the battery and the load circuit breaker after the load circuit breaker is opened.

[0028] In an embodiment, the method may further include: sending a signal via a communication line to the power management device to pre-notify the disconnection of the load circuit breaker before disconnecting the load circuit breaker.

[0029] In an embodiment, the step of disconnecting the load circuit breaker may include: disconnecting the load circuit breaker when a predetermined time has elapsed since the signal was sent.

[0030] However, this disclosure is not limited to the foregoing aspects and features, and the foregoing and other aspects and features will be set forth in part in the detailed description which follows with reference to the accompanying drawings, and will be readily understood in part by means of the detailed description which follows with reference to the accompanying drawings, or may be learned by practicing one or more of the embodiments presented in this disclosure. Attached Figure Description

[0031] The following accompanying drawings illustrate embodiments of the present disclosure and further describe aspects and features of the disclosure together with the detailed description of the present disclosure. Therefore, the present disclosure should not be construed as limited to the drawings, in which: Figure 1This is a block diagram illustrating the configuration of a battery management device according to one or more embodiments of the present disclosure; Figure 2 This is a diagram illustrating a method of sending a signal to a power management device in advance to notify the disconnection of a load circuit breaker according to one or more embodiments of the present disclosure; Figure 3 This is a table illustrating examples of signals that provide advance notice of disconnection of a load circuit breaker according to one or more embodiments of this disclosure; Figure 4 This is a diagram illustrating the configuration of a battery management system according to one or more embodiments of the present disclosure; Figure 5 This is a diagram illustrating the configuration of a battery management system including multiple battery containers according to one or more embodiments of the present disclosure; Figure 6 This is a signaling diagram illustrating a battery management method in a battery management system according to one or more embodiments of the present disclosure; Figure 7 This is a table illustrating examples of signals transmitted and received in a battery management system according to one or more embodiments of the present disclosure; Figure 8 This is a flowchart illustrating a battery management method according to one or more embodiments of the present disclosure; and Figure 9 This is a flowchart illustrating a battery management method according to one or more embodiments of the present disclosure. Detailed Implementation

[0032] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, but should be interpreted based on the principle that the inventor may be his / her own lexicographer to appropriately define the concepts of the terms so as to best illustrate his / her invention, and are therefore interpreted as meanings and concepts consistent with the technical spirit of the present disclosure.

[0033] The embodiments described in this specification and the constructions shown in the accompanying drawings are merely some embodiments of this disclosure and do not represent all technical ideas, aspects, and features of this disclosure. Therefore, it should be understood that various equivalents and modifications may exist, which may replace or modify the embodiments described herein at the time of filing this application.

[0034] It will be understood that when an element or layer is referred to as being "on" another element or layer, "connected" to another element or layer, or "bonded" to another element or layer, it may be directly on, directly connected to, or directly bonded to the other element or layer, or one or more intermediary elements or intermediary layers may be present. When an element or layer is referred to as being "directly on" another element or layer, "directly connected" to another element or layer, or "directly bonded" to another element or layer, no intermediary element or intermediary layer is present. For example, when a first element is described as being "bonded" or "connected" to a second element, the first element may be directly bonded or connected to the second element, or the first element may be indirectly bonded or connected to the second element via one or more intermediary elements.

[0035] In the accompanying drawings, the dimensions of various elements, layers, etc., may be exaggerated for clarity. The same reference numerals denote the same elements. As used herein, the term "and / or" includes any one of the associated listed items and all combinations of one or more of the associated listed items. Furthermore, when describing embodiments of this disclosure, the use of "may" refers to "one or more embodiments of this disclosure." When expressions such as "at least one of..." and "any one of..." follow a list of elements, they modify the entire list of elements rather than individual elements in the list. When a list of elements A, B, and C is specified using phrases such as "at least one of A, B, and C," "at least one of A, B, or C," "at least one selected from the group of A, B, and C," or "at least one selected from A, B, and C," the phrase may refer to any and all suitable combinations or subsets of A, B, and C, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term "use" and its variations may be considered synonymous with the term "utilize" and its variations, respectively. As used herein, the terms “basic,” “about,” and similar terms are used as approximate terms rather than terms of degree and are intended to explain the inherent biases of the measured or calculated values ​​that would be recognized by one of ordinary skill in the art.

[0036] It will be understood that although the terms “first,” “second,” “third,” etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of the exemplary embodiments, the first element, first component, first region, first layer, or first portion discussed below may be referred to as a second element, second component, second region, second layer, or second portion.

[0037] For ease of description, spatial relative terms (such as "below," "under," "lower," "above," "upper," etc.) may be used herein to describe the relationship of an element or feature as shown in the figure to other elements or features. It will be understood that, in addition to the orientation depicted in the figure, spatial relative terms are intended to also cover different orientations of the device during use or operation. For example, if the device in the figure is flipped, an element described as "below" or "beneath" other elements or features will be oriented as "above" or "above" said other elements or features. Therefore, the term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0038] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to be limiting of this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will be further understood that, when used in this specification, the terms “comprising,” “including,” and / or variations thereof specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0039] Furthermore, any numerical range disclosed and / or described herein is intended to include all subranges with the same numerical precision that fall within the described range. For example, the range "1.0 to 10.0" is intended to include all subranges between (and including) the described minimum value of 1.0 and the described maximum value of 10.0, i.e., all subranges with a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to amend this specification and claims to expressly describe any subranges that fall within the range expressly described herein.

[0040] Referring to two compared elements, features, etc., as “identical” can mean that they are “substantially identical.” Therefore, the phrase “substantially identical” can include cases with a deviation that is considered low in the art (e.g., 5% or less). Additionally, when a particular parameter is said to be uniform in a given region, it can mean that it is uniform in terms of average value.

[0041] Throughout this specification, unless otherwise stated, each element may be a single or multiple.

[0042] When any element is referred to as being positioned (or located or positioned) "above (or below)" or "on (or below)" a component, it can mean that the element can be placed to contact the upper (or lower) surface of the component, and it can also mean that another element can be located between the component and the element positioned (or located or positioned) on (or below) the component.

[0043] Furthermore, it will be understood that when an element is referred to as being "joined," "linked," or "connected" to another element, the elements can be directly "joined," "linked," or "connected" to each other, or there can be an intermediary element through which the elements can be "joined," "linked," or "connected" to the other element. Additionally, when a part is referred to as being "electrically connected" to another part, that part can be directly connected to the other part, or there can be an intermediary part through which the part and the other part are indirectly connected to each other.

[0044] Throughout this specification, when “A and / or B” is stated, unless otherwise specified, it means A, B, or A and B. That is, “and / or” includes any or all combinations of the listed items. Unless otherwise specifically stated, when “C to D” is stated, it means greater than or equal to C and less than or equal to D.

[0045] Figure 1 This is a block diagram illustrating the configuration of a battery management device 100 according to one or more embodiments of the present disclosure.

[0046] Reference Figure 1 The battery management device 100 can manage the battery 102. The battery management device 100 may include a detection circuit 110 and a control circuit 120. However, the configuration of the battery management device 100 is not limited thereto. According to various embodiments, in addition to the components described above, the battery management device 100 may also include at least one other component. For example, the battery management device 100 may also include a balancing circuit (e.g., a balancing device) that performs balancing operations on the battery 102 and the battery modules and / or individual battery cells constituting the battery 102.

[0047] The detection circuit 110 (e.g., a detection device) can detect state information indicating the state of the battery 102 (e.g., voltage, current, temperature, etc.). For example, the detection circuit 110 can detect the state of the battery 102 and can detect state information indicating the state of the battery. As an example, the detection circuit 110 can detect the voltage of each battery cell or each battery module constituting the battery 102. As another example, the detection circuit 110 can detect the current flowing through each battery cell or each battery module constituting the battery pack. As yet another example, the detection circuit 110 can detect the temperature around the battery cells, battery modules, and / or at least one point of the battery 102.

[0048] The control circuit 120 (e.g., a control device) can monitor the state of the battery 102 based on state information (e.g., voltage, current, temperature, etc.) detected by the detection circuit 110, and can control functions associated with the battery 102 based on the monitoring results. For example, the control circuit 120 can receive state information of the battery 102 from the detection circuit 110, and can monitor and calculate the voltage, current, temperature, state of charge (SOC), state of health (SOH), etc. of the battery 102 based on the received state information. Furthermore, the control circuit 120 can perform temperature control, equalization control, charge / discharge control, etc., based on the monitoring results. The control circuit 120 can perform protection functions (e.g., over-discharge protection, overcharge protection, overcurrent protection, short-circuit protection, fire suppression function, etc.) based on the monitoring results. In addition, the control circuit 120 can perform wired or wireless communication functions with the battery 102, battery module, or battery pack, or one or more external devices (e.g., higher-level controllers, vehicles, chargers, power conversion devices 104, etc.).

[0049] According to one or more embodiments, control circuitry 120 may disconnect a load circuit breaker 106 (e.g., a disconnect switch unit (DSU)) electrically connected between battery 102 and power conversion device 104 in response to detecting an abnormal state of battery 102 during charging or discharging. Load circuit breaker 106 may disconnect or connect the load current between battery 102 and power conversion device 104. For example, when load circuit breaker 106 electrically connected between battery 102 and power conversion device 104 is disconnected, the DC contactor electrically connected between battery 102 and power conversion device 104 may become unloaded. Control circuitry 120 may then disconnect the DC contactor. Therefore, in the event of an abnormal state of battery 102 (e.g., when battery 102 is in an abnormal state), if the load circuit breaker 106 opens first and then disconnects the DC contactor in a no-load state after the load circuit breaker 106 opens (e.g., when the load circuit breaker 106 opens first and then disconnects the DC contactor in a no-load state), the performance of battery 102 and power conversion device 104 may not be degraded (e.g., damage may be minimized or reduced), and the protection operation of battery 102 can be performed more safely. In some embodiments, control circuit 120 may disconnect the DC contactor in response to receiving a signal indicating the open state of load circuit breaker 106.

[0050] According to one or more embodiments, control circuitry 120 may send a signal via a communication line to a power management device (e.g., a power management system (PMS) or energy management system (EMS)) prior to disconnecting load circuit breaker 106. The power management device can manage the power supplied to the system. For example, the power management device can manage the power of battery management device 100, power conversion device 104, and battery 102. The signal to pre-disconnect load circuit breaker 106 may include a disconnection delay bit.

[0051] According to one or more embodiments, when the power management device receives a signal from the control circuit 120 that pre-notification to disconnect the load circuit breaker 106 is received, the power management device may adjust the output of the power conversion device 104 to be less than a suitable value (e.g., a specific value or a predetermined value). For example, the power management device may adjust the output of the power conversion device 104 to a zero value (“0”) in response to receiving the signal that pre-notification to disconnect the load circuit breaker 106 is received. Adjusting the output of the power conversion device 104 to a zero value may include interrupting charging or discharging. Furthermore, if the output of the power conversion device 104 is adjusted to a zero value (e.g., when the output of the power conversion device 104 is adjusted to a zero value), the DC contactor electrically connected between the battery 102 and the power conversion device 104 may become unloaded. The control circuit 120 may then disconnect the load circuit breaker 106. Therefore, when the battery 102 is in an abnormal state, the control circuit 120 may cause the power management device to adjust the output of the power conversion device 104 to a zero value by sending a signal to the power management device that pre-notification to disconnect the load circuit breaker 106 is received. Then, the control circuit 120 can perform the protection operation of the battery 102 more safely without degrading the performance of the battery 102 and the power conversion device 104 (e.g., minimizing or reducing damage) by disconnecting the load circuit breaker 106 after the output of the power conversion device 104 is adjusted to zero and disconnecting the DC contactor in the no-load state after disconnecting the load circuit breaker 106.

[0052] According to one or more embodiments, control circuit 120 may disconnect load circuit breaker 106 when a suitable time (e.g., a specific time or a predetermined time, such as 5 seconds) has elapsed since the signal to pre-notify the disconnection of load circuit breaker 106 was sent. For example, control circuit 120 may wait for a suitable time (e.g., a specific time or a predetermined time) after sending the signal to the power management device to pre-notify the disconnection of load circuit breaker 106. This time may include the time taken for the power management device to receive the signal to pre-notify the disconnection of load circuit breaker 106 and adjust the output of power conversion device 104 to zero. Therefore, control circuit 120 may disconnect load circuit breaker 106 after waiting for the time taken for the power management device to adjust the output of power conversion device 104 to zero. In some embodiments, control circuit 120 may disconnect the DC contactor electrically connected between battery 102 and power conversion device 104 when a suitable time (e.g., a specific time or a predetermined time, such as 5 seconds) has elapsed since the signal to pre-notify the disconnection of load circuit breaker 106 was sent.

[0053] Figure 2This is a diagram illustrating a method of sending a signal to a power management device 220 to pre-notify the disconnection of a load circuit breaker according to one or more embodiments of the present disclosure. Figure 3 This is a table illustrating examples of signals that provide advance notice of disconnection of a load circuit breaker according to one or more embodiments of this disclosure.

[0054] Reference Figure 2 and Figure 3 Battery management device 210 (e.g., Figure 1 The battery management device 100 can respond to the detection of a battery (e.g., Figure 1 If the battery 102 is in an abnormal state, a pre-notification is sent to the power management device 220 to disconnect the load circuit breaker (e.g., Figure 1 The signal from the load circuit breaker 106. For example, the battery management device 210 can notify the power management device 220 to disconnect the load circuit breaker in advance. The load circuit breaker can be electrically connected between the battery and the power conversion device 230, and can disconnect or connect the load current. In addition, the signal to notify the load circuit breaker to disconnect in advance can include a disconnection delay bit. Figure 3 An example of instruction 320 is shown for setting the disconnect delay bit to a signal 310 that pre-notifies the disconnection of the load circuit breaker for each battery container.

[0055] When the power management device 220 receives a signal from the battery management device 210 that pre-notification to disconnect the load circuit breaker, the power management device 220 can adjust the output of the power conversion device 230 to be less than a suitable value (e.g., a specific value or a predetermined value). For example, the power management device 220 can adjust the output of the power conversion device 230 to zero in response to receiving the signal that pre-notification to disconnect the load circuit breaker, thereby interrupting charging or discharging. Furthermore, when the output of the power conversion device 230 is adjusted to zero, the DC contactor electrically connected between the battery and the power conversion device 230 can become unloaded.

[0056] Then, battery management device 210 can disconnect the load circuit breaker. In this case, battery management device 210 can disconnect the load circuit breaker if a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the signal to power management device 220 was sent to inform it of the load circuit breaker disconnection. This time can be determined based on the time from when battery management device 210 sends the signal to inform it of the load circuit breaker disconnection to when power management device 220 receives the signal, and the time when power management device 220 adjusts the output of power conversion device 230 to zero. After the load circuit breaker is disconnected, battery management device 210 can disconnect the DC contactor. According to one or more embodiments, battery management device 210 can disconnect the DC contactor in response to receiving a signal indicating the state of disconnection of the load circuit breaker (e.g., a feedback signal from the load circuit breaker). In some embodiments, the battery management device 210 may disconnect the DC contactor after an appropriate time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the signal that a pre-notification to disconnect the load circuit breaker was sent.

[0057] Figure 4 This is a diagram illustrating the configuration of a battery management system according to one or more embodiments of the present disclosure.

[0058] Reference Figure 4 The battery management system may include a battery container 400, a battery management device 420, a power management device 460, and a power conversion device 470. However, the configuration of the battery management system is not limited thereto. According to various embodiments, the battery management system may not include at least one of the above-described components, and / or may also include at least one other component.

[0059] Battery container 400 may include a plurality of batteries 410 (e.g., Figure 1 The battery container 400 includes a battery 102, a detection device 430, a load circuit breaker 440, and a DC contactor. However, the configuration of the battery container 400 is not limited to this. According to various embodiments, the battery container 400 may not include at least one of the above-described components, and / or may also include at least one other component. For example, a battery management device 420 may be included in the battery container 400.

[0060] According to one or more embodiments, each of the plurality of batteries 410 may include a plurality of battery racks 412, 414, and 416, in which battery modules or battery packs including battery modules are connected in series and / or parallel. According to one or more embodiments, the plurality of battery racks 412, 414, and 416 may send data or signals to and receive data or signals from the battery management device 420 using the CAN (Controller Area Network) communication protocol.

[0061] The detection device 430 can detect status information 432 indicating the status of a plurality of batteries 410 and battery containers 400. For example, the detection device 430 can detect the status of a plurality of batteries 410 and battery containers 400, and can detect status information 432 indicating the status of a plurality of batteries 410 and battery containers 400. According to one or more embodiments, the detection device 430 can receive status information 432 indicating the status of battery containers 400 from at least one of a cooling device 434, a heating, ventilation, and air conditioning (HVAC) system 436, and a fire alarm control panel (FACP) included in or near battery containers 400. In this case, the detection device 430 can send data or signals to and receive data or signals from at least one of the cooling device 434, HVAC system 436, and FACP using a serial communication protocol (e.g., RS485). According to one or more embodiments, the detection device 430 may include a programmable logic controller (PLC).

[0062] The detection device 430 can send status information 432 to the battery management device 420. For example, the detection device 430 can collect information about abnormal states (e.g., fault states) occurring in the battery container 400 and can send the collected information to the battery management device 420. According to one or more embodiments, the detection device 430 can send data or signals to and receive data or signals from the battery management device 420 using a serial communication protocol (e.g., RS485).

[0063] The detection device 430 can control the switching on / off of the load circuit breaker 440. According to one or more embodiments, the detection device 430 can disconnect the load circuit breaker 440 in response to detecting an abnormal state of the battery container 400 based on state information 432 indicating the state of the battery container 400 during the charging or discharging of the plurality of batteries 410. According to one or more embodiments, the detection device 430 can disconnect the load circuit breaker 440 when a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since a signal indicating an abnormal state of the battery container 400 was sent to the battery management device 420.

[0064] The load circuit breaker 440 can be electrically connected between multiple batteries 410 and the power conversion device 470, thus enabling the disconnection or connection of load current. According to one or more embodiments, the load circuit breaker 440 may include a DSU (Discharge Unit).

[0065] A DC contactor can be electrically connected between each of the plurality of batteries 410 and the load circuit breaker 440. For example, a plurality of DC contactors can be configured, and each of the plurality of DC contactors can be electrically connected between one of the plurality of batteries 410 and the load circuit breaker 440.

[0066] The battery management device 420 can manage multiple batteries 410 and battery container 400. The battery management device 420 can receive status information 432 indicating the status of the battery container 400 from the detection device 430, and can monitor the status of the battery container 400 based on the received status information 432. Furthermore, the battery management device 420 can control functions associated with the internal components of the battery container 400 (e.g., the multiple batteries 410) based on the monitoring results.

[0067] According to one or more embodiments, the battery management device 420 can disconnect the DC contactors associated with an abnormal state of the battery container 400 among a plurality of DC contactors after the load circuit breaker 440 is opened. For example, if the load circuit breaker 440 is opened and the plurality of DC contactors become unloaded (e.g., when the load circuit breaker 440 is opened and the plurality of DC contactors become unloaded), the battery management device 420 can disconnect the DC contactors associated with the abnormal state of the battery container 400. Therefore, in the case of an abnormal state of the battery container 400 (e.g., when the battery container 400 is in an abnormal state), if the load circuit breaker 440 is opened first and the DC contactors in the unloaded state are disconnected after the load circuit breaker 440 is opened (e.g., when the load circuit breaker 440 is opened first and the DC contactors in the unloaded state are disconnected), the performance of the plurality of batteries 410 and the power conversion device 470 may not be degraded (e.g., damage may be minimized or reduced), and the protective operation of the battery container 400 can be performed more safely. In some embodiments, the battery management device 420 may disconnect the DC contactor associated with an abnormal state of the battery container 400 in response to receiving a signal indicating the open state of the load circuit breaker 440.

[0068] According to one or more embodiments, if the battery management device 420 receives a signal from the detection device 430 indicating an abnormal state of the battery container 400 (e.g., when the battery management device 420 receives a signal from the detection device 430 indicating an abnormal state of the battery container 400), the battery management device 420 may send a signal to the power management device 460 to pre-notify the disconnection of the load circuit breaker 440. The signal to pre-notify the disconnection of the load circuit breaker 440 may include a disconnection delay bit. According to one or more embodiments, the battery management device 420 may send data or signals to and receive data or signals from the power management device 460 via the hub 450. In this case, the communication protocol used may include, for example, the Modbus TCP / IP communication protocol. In some embodiments, if a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the power management device 460 sent a signal to disconnect the load circuit breaker 440 in advance (e.g., when a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the power management device 460 sent a signal to disconnect the load circuit breaker 440 in advance), the battery management device 420 may disconnect the DC contactor associated with an abnormal state of the battery container 400.

[0069] The power management device 460 can manage the power supplied to the battery management system. For example, the power management device 460 can manage the power of components (e.g., multiple batteries 410) within the battery container 400, the battery management device 420, and the power conversion device 470.

[0070] According to one or more embodiments, when the power management device 460 receives a signal from the battery management device 420 that pre-notification to disconnect the load circuit breaker 440 is received, the power management device 460 can adjust the output of the power conversion device 470 to a value less than a suitable value (e.g., a specific value or a predetermined value). For example, the power management device 460 can adjust the output of the power conversion device 470 to zero in response to receiving the signal that pre-notification to disconnect the load circuit breaker 440 is received, thus interrupting charging or discharging. In this case, when the output of the power conversion device 470 is adjusted to zero, the DC contactor can become unloaded. Then, when multiple DC contactors have become unloaded, the battery management device 420 can disconnect the DC contactor associated with the abnormal state of the battery container 400. Therefore, the performance of the multiple batteries 410 and the power conversion device 470 can be maintained without degradation (e.g., damage can be minimized or reduced), and the protective operation of the battery container 400 can be performed more safely.

[0071] The power conversion device 470 can convert electrical energy into a different form and supply electrical energy to meet the requirements of a power system. For example, the power conversion device 470 can convert AC power from an external power source into DC power and store it (e.g., it can be charged) in multiple batteries 410. The power conversion device 470 can also convert the DC power stored in the multiple batteries 410 into AC power and supply it (e.g., it can be discharged) to an external system.

[0072] Figure 5 This is a diagram illustrating the configuration of a battery management system including multiple battery containers 502 and 504 according to one or more embodiments of the present disclosure. Figure 5 The battery management system shown above can be referenced. Figure 4 An extended version of the described battery management system. Figure 5 For ease of explanation, the structure of the battery management system, including multiple battery containers 502 and 504, will be described in more detail. Therefore, it is unnecessary to repeat the details. Figure 5 References above Figure 4 Redundant descriptions of configurations and components that are identical or substantially identical (or similar).

[0073] Reference Figure 5 The battery management system may include multiple battery containers 502 and 504 (e.g., multiple Figure 4Battery container 400), battery management device 520 (e.g., Figure 4 Battery management device 420), power management device 560 (e.g., Figure 4 The power management device 460) and the power conversion device 570 (e.g., Figure 4 (Power conversion device 470). However, the configuration of the battery management system is not limited thereto. According to various embodiments, the battery management system may not include at least one of the components described above, and / or may also include at least one other component.

[0074] Each of the multiple battery containers 502 and 504 may include multiple batteries 512 or 514 (e.g., Figure 4 The battery containers 502 and 504 include multiple batteries 410, detection devices 532 or 534, load circuit breakers 542 or 544, and DC contactors. However, the configuration of each of the multiple battery containers 502 and 504 is not limited thereto. According to various embodiments, each of the multiple battery containers 502 and 504 may not include at least one of the above-described components, and / or may also include at least one other component. Furthermore, Figure 5 The diagram illustrates a battery management system comprising a first battery container 502 and a second battery container 504, but the number of battery containers included in the battery management system is not limited thereto. For example, the battery management system may also include at least one other third battery container.

[0075] According to one or more embodiments, the plurality of batteries 512 and 514 included in each of the plurality of battery containers 502 and 504 may include a plurality of battery holders 512a, 512b, 512c, 514a, 514b, and 514c. For example, each of the plurality of first batteries 512 included in the first battery container 502 may include a plurality of battery holders 512a, 512b, and 512c. Furthermore, each of the plurality of second batteries 514 included in the second battery container 504 may include a plurality of battery holders 514a, 514b, and 514c.

[0076] According to one or more embodiments, multiple battery racks 512a, 512b, 512c, 514a, 514b, and 514c can send data or signals to and receive data or signals from each other using a CAN communication protocol. Furthermore, multiple battery racks 512a, 512b, and 512c included in one of the multiple battery containers 502 and 504 (e.g., the first battery container 502) can send data or signals to and receive data or signals from the battery management device 520 using a CAN communication protocol. Additionally, multiple battery racks 514a, 514b, and 514c included in another battery container (e.g., the second battery container 504) of the multiple battery containers 502 and 504 may not communicate directly with the battery management device 520, but can communicate with adjacent multiple battery racks 512a, 512b, and 512c using an optical CAN communication protocol.

[0077] Detection devices 532 and 534 can detect status information 532a and 534a indicating the state of the plurality of batteries 512 and 514 and the battery containers 502 and 504. For example, a first detection device 532 included in a first battery container 502 can detect first status information 532a indicating the state of the plurality of first batteries 512 and the first battery container 502. Furthermore, a second detection device 534 included in a second battery container 504 can detect second status information 534a indicating the state of the plurality of second batteries 514 and the second battery container 504. According to one or more embodiments, detection devices 532 and 534 can receive status information 532a and 534a indicating the state of the battery containers 502 and 504 from at least one of a cooling device 532b and 534b, an HVAC system 532c and 534c, and a FACP disposed in or adjacent to the battery containers 502 and 504.

[0078] Detection devices 532 and 534 can send status information 532a and 534a to battery management device 520. As an example, detection device 532 or 534 (e.g., first detection device 532) included in one of the multiple battery containers 502 and 504 (e.g., first battery container 502) can send status information 532a or 534a (e.g., first status information 532a) to battery management device 520. As another example, detection device 532 or 534 (e.g., second detection device 534) included in another battery container (e.g., second battery container 504) among the multiple battery containers 502 and 504 may not send status information 532a or 534a (e.g., second status information 534a) directly to battery management device 520, but may instead send status information 532a or 534a (e.g., second status information 534a) indirectly via an adjacent detection device 532 or 534 (e.g., first detection device 532). In this configuration, the detection device 532 or 534 that directly sends status information 532a or 534a to the battery management device 520 (e.g., the first detection device 532) can be referred to as the master detection device, and the detection device 532 or 534 that indirectly sends status information 532a or 534a to the battery management device 520 (e.g., the second detection device 534) can be referred to as the slave detection device. The master detection device can communicate with the battery management device 520 using a serial communication protocol (e.g., RS485), and the slave detection device can communicate with the master detection device using the Modbus TCP / IP communication protocol. For example, the slave detection device can send status information 532a or 534a (e.g., second status information 534a) indicating the status of the battery container (e.g., the second battery container 504) including the slave detection device to the master detection device using the Modbus TCP / IP communication protocol. Then, the main detection device can collect status information 532a or 534a (e.g., first status information 532a) indicating the status of the battery container (e.g., the first battery container 502) including the main detection device and status information 532a or 534a (e.g., second status information 534a) received from the secondary detection device, and can send the collected information to the battery management device 520 by using a serial communication protocol (e.g., RS485).

[0079] Detection devices 532 and 534 can control the switching on / off of load circuit breakers 542 and 544. According to one or more embodiments, detection devices 532 and 534 can disconnect load circuit breakers 542 and 544 in response to detecting that battery containers 502 and 504 are in an abnormal state during charging or discharging of the plurality of batteries 512 and 514 based on status information 532a indicating the state of battery containers 502 and 504. For example, a first detection device 532 can disconnect a first load circuit breaker 542 in response to detecting that a first battery container 502 is in an abnormal state during charging or discharging of the plurality of first batteries 512 based on first status information 532a indicating the state of first battery container 502. Furthermore, a second detection device 534 can disconnect a second load circuit breaker 544 in response to detecting that a second battery container 504 is in an abnormal state during charging or discharging of the plurality of second batteries 514 based on second status information 534a indicating the state of second battery container 504. According to one or more embodiments, if a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed after the detection device 532 or 534 has sent a signal indicating an abnormal state of the battery container 502 or 504 to the battery management device 520 (e.g., when a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed after the detection device 532 or 534 has sent a signal indicating an abnormal state of the battery container 502 or 504 to the battery management device 520), the operation of the detection device 532 or 534 disconnecting the load circuit breaker 542 or 544 can be performed.

[0080] Load circuit breakers 542 and 544 can be electrically connected between the plurality of batteries 512 and 514 and the power conversion device 570, and can disconnect or connect the load current. For example, the first load circuit breaker 542 can be electrically connected between the plurality of first batteries 512 and the power conversion device 570, and can disconnect or connect the load current. Furthermore, the second load circuit breaker 544 can be electrically connected between the plurality of second batteries 514 and the power conversion device 570, and can disconnect or connect the load current.

[0081] The DC contactors can be electrically connected between each of the plurality of batteries 512 and 514 and the load disconnect switches 542 and 544. For example, each of the plurality of first DC contactors can be electrically connected between a corresponding one of the plurality of first batteries 512 and the first load disconnect switch 542. Furthermore, each of the plurality of second DC contactors can be electrically connected between a corresponding one of the plurality of second batteries 514 and the second load disconnect switch 544.

[0082] The battery management device 520 can manage multiple batteries 512 and 514, as well as battery containers 502 and 504. According to one or more embodiments, the battery management device 520 may be included in one of the multiple battery containers 502 and 504. For example, the battery management device 520 may be included in a first battery container 502.

[0083] According to one or more embodiments, the battery management device 520 can disconnect the DC contactors among a plurality of DC contactors associated with an abnormal state of battery containers 502 and 504 after load circuit breakers 542 and 544 are opened. For example, if load circuit breakers 542 and 544 are opened and the plurality of DC contactors become unloaded (e.g., when load circuit breakers 542 and 544 are opened and the plurality of DC contactors become unloaded), the battery management device 520 can disconnect the DC contactors associated with an abnormal state of battery containers 502 and 504. As an example, the battery management device 520 can disconnect the DC contactors among a plurality of first DC contactors associated with an abnormal state of first battery container 502 after the first load circuit breaker 542 is opened. As another example, the battery management device 520 can disconnect the DC contactors among a plurality of second DC contactors associated with an abnormal state of second battery container 504 after the second load circuit breaker 544 is opened. Therefore, in the event of an abnormal state of battery containers 502 and 504 (e.g., when battery containers 502 and 504 are in an abnormal state), if load circuit breakers 542 and 544 open first and then disconnect the DC contactor in a no-load state after load circuit breakers 542 and 544 open (e.g., when load circuit breakers 542 and 544 open first and then disconnect the DC contactor in a no-load state after load circuit breakers 542 and 544 open), the performance of the plurality of batteries 512 and 514 and the power conversion device 570 may not be degraded (e.g., damage may be minimized or reduced), and the protection operation of battery containers 502 and 504 can be performed more safely. In some embodiments, battery management device 520 may disconnect the DC contactor associated with the abnormal state of battery containers 502 and 504 in response to receiving a signal indicating the open state of load circuit breakers 542 and 544.

[0084] According to one or more embodiments, if the battery management device 520 receives a signal from the main detection device indicating an abnormal state of battery containers 502 and 504 (e.g., when the battery management device 520 receives a signal from the main detection device indicating an abnormal state of battery containers 502 and 504), the battery management device 520 may send a signal to the power management device 560 to pre-notify the disconnection of load circuit breakers 542 and 544. For example, if the battery management device 520 receives a signal from the main detection device indicating an abnormal state of the first battery container 502 (e.g., when the battery management device 520 receives a signal from the main detection device indicating an abnormal state of the first battery container 502), the battery management device 520 may send a signal to the power management device 560 to pre-notify the disconnection of the first load circuit breaker 542. Furthermore, if the battery management device 520 receives a signal from the main detection device indicating an abnormal state of the second battery container 504 (for example, when the battery management device 520 receives a signal from the main detection device indicating an abnormal state of the second battery container 504), the battery management device 520 may send a signal to the power management device 560 to pre-notify the disconnection of the second load circuit breaker 544.

[0085] According to one or more embodiments, battery management device 520 can send or receive data or signals to and from power management device 560 via hub 550. In this case, the communication protocol used may include, for example, Modbus TCP / IP communication protocol. In some embodiments, if a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the power management device 560 sent a signal to pre-notify the disconnection of load circuit breakers 542 and 544 (e.g., when a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the power management device 560 sent a signal to pre-notify the disconnection of load circuit breakers 542 and 544), battery management device 520 can disconnect the DC contactor associated with the abnormal state of battery containers 502 and 504.

[0086] The power management device 560 can manage the power supplied to the battery management system. According to one or more embodiments, if the power management device 560 receives a signal from the battery management device 520 that pre-notification is received to disconnect load circuit breakers 542 and 544 (e.g., when the power management device 560 receives the signal from the battery management device 520 that pre-notification is received to disconnect load circuit breakers 542 and 544), the power management device 560 adjusts the output of the power conversion device 570 to a value less than a suitable value (e.g., a specific value or a predetermined value). For example, the power management device 560 can adjust the output of the power conversion device 570 to zero in response to receiving the signal that pre-notification is received to disconnect load circuit breakers 542 and 544, thus interrupting charging or discharging. In this case, if the output of the power conversion device 570 is adjusted to zero (e.g., when the output of the power conversion device 570 is adjusted to zero), the DC contactor can become an no-load state. Then, if multiple DC contactors become unloaded (e.g., when multiple DC contactors become unloaded), the battery management device 520 can disconnect the DC contactors associated with the abnormal state of battery containers 502 and 504. Therefore, the performance of the multiple batteries 512 and 514 and the power conversion device 570 can be maintained without degradation (e.g., damage can be minimized or reduced), and the protective operation of battery containers 502 and 504 can be performed more safely.

[0087] Figure 6 This is a signaling diagram illustrating a battery management method in a battery management system according to one or more embodiments of the present disclosure. Figure 7 This is a table illustrating examples of signals transmitted and received in a battery management system according to one or more embodiments of the present disclosure.

[0088] Reference Figure 6 and Figure 7 Includes a detection device 610 in the battery management system (e.g., Figure 4 Detection device 430 or Figure 5 The detection devices 532 and 534 can detect battery containers (e.g., Figure 4 Battery container 400 or Figure 5 Abnormal conditions of battery containers 502 and 504 (S612). For example, the detection device 610 can detect abnormal conditions of battery containers including the detection device 610.

[0089] If an abnormal state of the battery container is detected (e.g., when an abnormal state of the battery container is detected), the detection device 610 can send a signal indicating the abnormal state of the battery container to the battery management device 620 (e.g., Figure 4 Battery management device 420 or Figure 5Battery management device 520 (S614).

[0090] When a signal indicating an abnormal state of the battery container is received, the battery management device 620 can send a signal to the power management device 630 (e.g., Figure 4 Power management device 460 or Figure 5 The power management device 560 sends a prior notice to disconnect the load circuit breaker (e.g., Figure 4 440 load circuit breaker or Figure 5 The signal (S622) for the load circuit breakers 542 and 544. The signal that pre-notifies the disconnection of the load circuit breaker may include a disconnection delay bit (such as, Figure 7 The first signal 710 shown is (e.g., "DSU disconnect delay bit" signal).

[0091] When the power management device 630 receives a signal that has been pre-notified to disconnect the load circuit breakers 542 and 544, it can adjust the power conversion device (e.g., Figure 4 Power conversion device 470 or Figure 5 The output of the power conversion device 570 (S632). For example, the power management device 630 can adjust the output of the power conversion device to zero in response to receiving a signal that pre-notification to disconnect the load circuit breaker.

[0092] When a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the signal indicating an abnormal state of the battery container was sent, the detection device 610 can disconnect the load circuit breaker (S616). For example, if a suitable time (e.g., a specific time or a predetermined time) has elapsed since the signal indicating an abnormal state of the battery container was sent (e.g., when a suitable time (e.g., a specific time or a predetermined time) has elapsed since the signal indicating an abnormal state of the battery container was sent), the detection device 610 can disconnect the load circuit breaker (S616). Figure 7 The second signal 720 shown (e.g., "DSU Disconnect" signal) is sent to the load circuit breaker, thus allowing the load circuit breaker to be disconnected. Therefore, if the load circuit breaker is disconnected (e.g., when the load circuit breaker is open), the electrical connection to the battery (e.g., Figure 4 Battery 410 or Figure 5 The DC contactor between the batteries 512 and 514 and the load circuit breaker can be switched to an unloaded state.

[0093] When the load circuit breaker is disconnected, the detection device 610 can feed back the disconnected state of the load circuit breaker to the battery management device 620 (S618). For example, the detection device 610 can send a feedback signal indicating the disconnected state of the load circuit breaker to the battery management device 620 after disconnecting the load circuit breaker.

[0094] When a feedback signal indicating the open state of the load circuit breaker is received, the battery management device 620 can disconnect the DC contactor (S624). For example, the battery management device 620 can, in response to receiving the feedback signal indicating the open state of the load circuit breaker, disconnect the DC contactor. Figure 7 The third signal 730 shown (e.g., a "DC contactor disconnect" signal) is sent to the DC contactor, thus disconnecting the DC contactor. Therefore, if the battery container is in an abnormal state (e.g., when the battery container is in an abnormal state), the battery management system can more safely perform protective operations on the battery container by switching the DC contactor to an no-load state and disconnecting the DC contactor in the no-load state, while minimizing or reducing damage to the internal components of the battery management system.

[0095] Figure 8 This is a flowchart illustrating a battery management method according to one or more embodiments of the present disclosure.

[0096] Reference Figure 8 This method can be started, and the battery management device (e.g., Figure 1 The battery management device 100 can detect indications of the battery (e.g., Figure 1 Status information of the battery 102 (S810).

[0097] The battery management device can monitor the battery status based on status information (S820).

[0098] The battery management device can disconnect the load circuit breaker (e.g., in response to detecting an abnormal state of the battery during charging or discharging) Figure 1 The load disconnect switch 106 (S830). For example, the battery management device may disconnect the electrical connection between the battery and the power conversion device (e.g., in response to detecting an abnormal state of the battery during charging or discharging. Figure 1 The load circuit breaker between the power conversion device 104 and the load circuit breaker.

[0099] The battery management device can disconnect the DC contactor (S840) after the load circuit breaker is opened, and the method can end thereafter. For example, the battery management device can disconnect the DC contactor electrically connected between the battery and the load circuit breaker after the load circuit breaker is opened.

[0100] The battery management method described above can also be applied to a battery management system in the same or similar manner. For example, in S810, the battery management system (e.g., Figure 4 Battery management system or Figure 5 The battery management system can detect indications from the battery container (e.g., Figure 4 Battery container 400 or Figure 5 The battery management system can then monitor the state of the battery containers (502 and 504) based on the state information in S820, and can disconnect the load circuit breaker (e.g., ...) in S830 in response to detecting that the battery containers are in an abnormal state during battery charging or discharging. Figure 4 440 load circuit breaker or Figure 5 (load circuit breakers 542 and 544). Then, in S840, the battery management system can disconnect the DC contactor associated with the abnormal state of the battery container after the load circuit breaker is opened, and the method can end.

[0101] Figure 9 This is a flowchart illustrating a battery management method according to one or more embodiments of the present disclosure.

[0102] Reference Figure 9 This method can be started, and the battery management device (e.g., Figure 1 The battery management device 100 can detect indications of the battery (e.g., Figure 1 Status information of the battery 102 (S910).

[0103] The battery management device can monitor the battery status based on status information (S920).

[0104] The battery management device can send a pre-notification to the power management device to disconnect the load circuit breaker (e.g., in response to detecting an abnormal state of the battery during charging or discharging) Figure 1 The signal from the load circuit breaker 106 (S930). For example, the battery management device may send a signal to the power management device via a communication line to pre-notify the load circuit breaker to be disconnected before disconnecting the load circuit breaker. When the signal to pre-notify the load circuit breaker to be disconnected is received, the power management device may use a power conversion device (e.g., Figure 1 The output of the power conversion device 104 is adjusted to be less than a suitable value (e.g., a specific value or a predetermined value). For example, the power management device can adjust the output of the power conversion device to zero.

[0105] If a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the signal to pre-notify the disconnection of the load circuit breaker was sent, the battery management device may disconnect the load circuit breaker (S940). For example, the battery management device may wait for a suitable time (e.g., a specific time or a predetermined time) to adjust the output of the power conversion device to a value less than a suitable value, and if a suitable time has elapsed (e.g., when a suitable time has elapsed), the load circuit breaker may be disconnected regardless of whether the output of the power conversion device has been adjusted.

[0106] The battery management device can disconnect the DC contactor (S950) after the load circuit breaker is opened, and the method can end thereafter. For example, the battery management device can disconnect the DC contactor electrically connected between the battery and the load circuit breaker after the load circuit breaker is opened.

[0107] The battery management method described above can also be applied to a battery management system in the same or similar manner. For example, in S910, the battery management system (e.g., Figure 4 Battery management system or Figure 5 The battery management system can detect indications from the battery container (e.g., Figure 4 Battery container 400 or Figure 5 The battery management system can then monitor the state of the battery containers (502 and 504) based on the state information in S920, and in S930, in response to detecting an abnormal state of the battery containers during charging or discharging, can notify the power management device (e.g., ...). Figure 4 Power management device 460 or Figure 5 The power management device 560 sends a prior notice to disconnect the load circuit breaker (e.g., Figure 4 440 load circuit breaker or Figure 5 The signal from the load circuit breakers 542 and 544. In this case, when a signal is received that the load circuit breaker has been pre-notified to be disconnected, the power management device can use the power switching device (e.g., Figure 4 Power conversion device 470 or Figure 5The output of the power conversion device 570 is adjusted to be less than a suitable value (e.g., a specific value or a predetermined value). For example, the power management device can adjust the output of the power conversion device to zero. Then, in S940, if a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the signal for pre-notification to disconnect the load circuit breaker has been sent (e.g., when a suitable time (e.g., a specific time or a predetermined time (e.g., 5 seconds)) has elapsed since the signal for pre-notification to disconnect the load circuit breaker has been sent), the battery management system can disconnect the load circuit breaker. For example, the battery management system can wait for a suitable time (e.g., a specific time or a predetermined time) to adjust the output of the power conversion device to be less than a suitable value, and if a suitable time has elapsed (e.g., when a suitable time has elapsed), it can disconnect the load circuit breaker regardless of whether the output of the power conversion device has been adjusted. Then, in S950, the battery management system can disconnect the DC contactor associated with the abnormal state of the battery container after the load circuit breaker is disconnected, and the method can end.

[0108] According to some embodiments of this disclosure, by controlling the disconnection of a DC contactor in an unloaded state, it is possible to support safer protective operations in abnormal conditions of the battery or battery container without degrading the performance of the battery and power conversion device.

[0109] However, the aspects and features of this disclosure are not limited to those described above, and those skilled in the art will clearly understand, through the description of the exemplary embodiments of this disclosure described above, other aspects and features not explicitly described herein.

[0110] Although this disclosure has been described with reference to embodiments and accompanying drawings illustrating aspects of this disclosure, this disclosure is not limited thereto. Various modifications and variations can be made by those skilled in the art within the scope of this disclosure and the claims and their equivalents.

[0111] Explanation of some figure labels 100: Battery Management Device 102: Battery 104: Power conversion device 106: Load circuit breaker 110: Detection circuit 120: Control circuit.

Claims

1. A battery management device, comprising: The detection circuit is configured to detect status information indicating the state of the battery. and The control circuit is configured to monitor the state of the battery based on the state information detected by the detection circuit, and to control functions associated with the battery based on the monitoring results. The control circuit is further configured to disconnect the load circuit breaker electrically connected between the battery and the power conversion device in response to detecting that the battery is in an abnormal state during charging or discharging of the battery.

2. The battery management device according to claim 1, wherein, The control circuit is also configured to disconnect the DC contactor electrically connected between the battery and the load circuit breaker after the load circuit breaker is opened.

3. The battery management device according to claim 1, wherein, The control circuit is also configured to send a signal via a communication line to the power management device to pre-notify the disconnection of the load circuit breaker before disconnecting the load circuit breaker.

4. The battery management device according to claim 3, wherein, The control circuit is also configured to disconnect the load circuit breaker when a predetermined time has elapsed since the signal was sent.

5. A battery management system, comprising: Power conversion device; Power management devices; First battery container; as well as Battery management device, The first battery container includes: Multiple first batteries; The first detection device is configured to detect first state information indicating the state of the first battery container; A first load circuit breaker is electrically connected between the plurality of first batteries and the power conversion device; and A plurality of first DC contactors, each first DC contactor being electrically connected between a corresponding one of the plurality of first batteries and the first load circuit breaker, and The first detection device is further configured to disconnect the first load circuit breaker in response to detecting an abnormal state of the first battery container based on the first state information during the charging or discharging of the plurality of first batteries.

6. The battery management system according to claim 5, wherein, The battery management device is configured to disconnect the DC contactor among the plurality of first DC contactors associated with the abnormal state of the first battery container after the first load circuit breaker is opened.

7. The battery management system according to claim 5, wherein, The first detection device is further configured to send a first signal indicating an abnormal state of the first battery container to the battery management device, and The battery management device is configured to: in response to receiving the first signal, send a second signal to the power management device in advance to notify the disconnection of the first load circuit breaker.

8. The battery management system according to claim 7, wherein, The power management device is configured to adjust the output of the power conversion device to a value less than a predetermined value in response to receiving the second signal.

9. The battery management system according to claim 7, wherein, The first detection device is further configured to disconnect the first load circuit breaker when a predetermined time has elapsed since the first signal was sent.

10. The battery management system according to claim 5, wherein, The battery management device is included in the first battery container.

11. The battery management system according to claim 5, further comprising a second battery container, the second battery container comprising: Multiple second batteries; The second detection device is configured to detect second status information indicating the state of the second battery container; The second load circuit breaker is electrically connected between the plurality of second batteries and the power conversion device; as well as A plurality of second DC contactors, each second DC contactor being electrically connected between a corresponding one of the plurality of second batteries and the second load circuit breaker.

12. The battery management system according to claim 11, wherein, The second detection device is further configured to disconnect the second load circuit breaker in response to detecting an abnormal state of the second battery container based on the second state information during the charging or discharging of the plurality of second batteries.

13. The battery management system according to claim 12, wherein, The battery management device is configured to disconnect the DC contactor among the plurality of second DC contactors associated with the abnormal state of the second battery container after the second load circuit breaker is opened.

14. The battery management system according to claim 12, wherein, The second detection device is further configured to send a third signal to the battery management device indicating an abnormal state of the second battery container, and The battery management device is configured to send a fourth signal to the power management device in advance, in response to receiving the third signal, to notify the second load circuit breaker to be disconnected.

15. The battery management system according to claim 14, wherein, The power management device is configured to adjust the output of the power conversion device to a value less than a predetermined value in response to receiving the fourth signal.

16. The battery management system according to claim 14, wherein, The second detection device is further configured to disconnect the second load circuit breaker when a predetermined time has elapsed since the third signal was sent.

17. A method for managing a battery, comprising: Detects status information indicating the battery's status; Based on the status information, monitor the status of the battery; as well as In response to the detection of an abnormal state of the battery during charging or discharging, the load circuit breaker electrically connected between the battery and the power conversion device is disconnected.

18. The method according to claim 17, further comprising: After the load circuit breaker is opened, disconnect the DC contactor that is electrically connected between the battery and the load circuit breaker.

19. The method of claim 17, further comprising: Before disconnecting the load circuit breaker, a signal is sent via a communication line to the power management device to notify the disconnection of the load circuit breaker.

20. The method according to claim 19, wherein, The step of disconnecting the load circuit breaker includes: disconnecting the load circuit breaker when a predetermined time has elapsed since the signal was sent.

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