KR102603205B1 - Apparatus and method for operating battery - Google Patents

Abstract

The present invention relates to a battery operating device and method that can effectively operate a battery pack including an emergency battery. A battery operating device according to an embodiment of the present invention is a device that operates a battery by having a charge/discharge switch and a fuse on a charge/discharge path that supplies charge/discharge current to a cell assembly, and can be connected in parallel with the charge/discharge path. an emergency charging/discharging path configured to enable; an emergency battery located on the emergency charge/discharge path and configured to be electrically connected in parallel with the cell assembly; A failure detection unit electrically connected to the charge/discharge switch and the fuse, receiving an electrical signal from the charge/discharge switch and the fuse, and configured to detect whether the charge/discharge switch and the fuse are broken based on the electrical signal. ; an SOC estimator electrically connected to the emergency battery, configured to receive an electrical signal from the emergency battery and estimate a charge amount of the emergency battery based on the electrical signal; and receiving a failure signal from the failure detection unit, controlling the connection relationship between the cell assembly and the emergency battery and the charge/discharge path based on the failure signal, and receiving the charge amount of the emergency battery from the SOC estimator. and a processor configured to balance the cell assembly and the emergency battery based on the charge amount.

Description

Battery operating device and method {Apparatus and method for operating battery}

The present invention relates to a battery operating device and method, and more specifically, to a battery operating device and method that can effectively operate a battery pack including an emergency battery in the process of operating the battery pack.

Recently, as the demand for portable electronic products such as laptops, video cameras, and portable phones has rapidly increased, and as the development of electric vehicles, energy storage batteries, robots, and satellites has begun, high-performance secondary batteries capable of repeated charging and discharging have been developed. Research is actively underway.

Currently commercialized secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries have little memory effect compared to nickel-based secondary batteries, so they can be freely charged and discharged. It is receiving attention for its extremely low self-discharge rate and high energy density.

Batteries are used in a variety of fields, and fields where batteries have been widely used recently, such as electric vehicles or smart grid systems, often require large capacities. In order to increase the capacity of the battery pack, there may be a way to increase the capacity of the secondary battery, that is, the battery cell itself, but in this case, the effect of increasing capacity is not significant, there are physical limitations to expanding the size of the secondary battery, and management is inconvenient. has Therefore, battery packs in which multiple battery modules are connected in series and parallel are generally widely used.

Meanwhile, the biggest social issue related to batteries recently is the safety issue of batteries. In the case of a vehicle equipped with such a battery pack, the vehicle cannot be driven in the event of a battery pack fire due to defective or malfunction of the battery pack. Moreover, if the battery pack fails while the vehicle is driving, a dangerous situation may occur in which the vehicle stops on the road. Additionally, if the vehicle stops on the road due to a battery pack failure, a secondary accident, such as a collision with a following vehicle, may occur. Therefore, there is a need to move the vehicle to a safe area such as the shoulder of the road to prevent secondary accidents.

The present invention was created against the background of the above prior art, and relates to an improved battery operating device and method that can effectively operate a battery pack including an emergency battery.

Other objects and advantages of the present invention can be understood from the following description and will be more clearly understood by practicing the present invention. In addition, it will be readily apparent that the objects and advantages of the present invention can be realized by means and combinations thereof indicated in the claims.

A battery operating device according to an embodiment of the present invention for achieving the above object is a device that operates a battery by having a charge/discharge switch and a fuse on a charge/discharge path that supplies charge/discharge current to the cell assembly, an emergency charge/discharge path configured to be connected in parallel with the charge/discharge path; an emergency battery located on the emergency charge/discharge path and configured to be electrically connected in parallel with the cell assembly; A failure detection unit electrically connected to the charge/discharge switch and the fuse, receiving an electrical signal from the charge/discharge switch and the fuse, and configured to detect whether the charge/discharge switch and the fuse are broken based on the electrical signal. ; an SOC estimator electrically connected to the emergency battery, configured to receive an electrical signal from the emergency battery and estimate a charge amount of the emergency battery based on the electrical signal; and receiving a failure signal from the failure detection unit, controlling the connection relationship between the cell assembly and the emergency battery and the charge/discharge path based on the failure signal, and receiving the charge amount of the emergency battery from the SOC estimator. and a processor configured to balance the cell assembly and the emergency battery based on the charge amount.

In addition, the processor may be configured to disconnect the connection relationship between the cell assembly and the charge/discharge path and connect the connection relationship between the emergency battery and the charge/discharge path when receiving a failure signal from the failure detection unit. there is.

In addition, the processor may be configured to electrically connect the cell assembly and the emergency battery when the charge amount of the emergency battery is less than a preset standard charge amount, and to charge the emergency battery using the power of the cell assembly. .

In addition, when the processor receives a failure signal from the failure detection unit, the processor transmits an emergency situation notification to the upper control device of the vehicle, calculates the vehicle drive time based on the charge amount of the emergency battery, and enables the calculated vehicle to be driven. Time can be transmitted to the upper control device.

Additionally, the BMS according to an embodiment of the present invention includes a battery operating device according to the present invention.

Additionally, a battery pack according to an embodiment of the present invention includes a battery operating device according to the present invention.

In addition, a battery operation method according to an embodiment of the present invention to achieve the above object is a method of operating a battery by providing a charge/discharge switch and a fuse on a charge/discharge path that supplies charge/discharge current to the cell assembly. Connecting an emergency battery to be electrically connected in parallel with the cell assembly; Receiving an electrical signal from the charge/discharge switch and the fuse, and detecting whether the charge/discharge switch and the fuse are broken based on the electrical signal; Receiving an electrical signal from the emergency battery and estimating the amount of charge of the emergency battery based on the electrical signal; and receiving a failure signal detected by the failure detection step and controlling the connection relationship between the cell assembly and the emergency battery and the charge/discharge path based on the failure signal, and the emergency battery estimated by the charge amount estimation step. It includes balancing the cell assembly and the emergency battery based on the amount of charge of the battery.

Additionally, in the emergency battery balancing step, when the failure signal is received, the connection between the cell assembly and the charging and discharging path may be disconnected, and the connection between the emergency battery and the charging and discharging path may be connected.

In the emergency battery balancing step, if the charge amount of the emergency battery is less than a preset standard charge amount, the cell assembly and the emergency battery may be electrically connected and the emergency battery may be charged using the power of the cell assembly.

In the emergency battery balancing step, when the failure signal is received, an emergency situation notification is transmitted to the upper control device of the vehicle, and the vehicle drivable time is calculated based on the charge amount of the emergency battery, and the calculated vehicle drivable time is calculated. It can be transmitted to the upper control device.

According to one aspect of the present invention, by providing an emergency battery, there is an advantage in that the battery system of a vehicle, etc. can be operated even when a battery pack failure occurs.

In particular, according to an embodiment of the present invention, an improved battery operation device and method can be provided that can extend the life of the emergency battery by balancing the battery pack and the emergency battery based on the charge amount of the emergency battery.

In addition, the present invention can have various other effects, and these other effects of the present invention can be understood through the following description and can be more clearly seen through examples of the present invention.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the invention described later. Therefore, the present invention includes the matters described in such drawings. It should not be interpreted as limited to only .
1 is a diagram schematically showing the functional configuration of a battery operating device according to an embodiment of the present invention.
Figure 2 is a diagram schematically showing a configuration in which an emergency battery is connected to a battery pack and a vehicle according to an embodiment of the present invention.
Figure 3 is a diagram schematically showing a configuration in which an emergency charging and discharging path is connected to a charging and discharging path according to an embodiment of the present invention.
Figure 4 is a diagram schematically showing some components connected to a processor according to an embodiment of the present invention.
Figure 5 is a flowchart schematically showing a battery operation method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor must appropriately use the concept of terms to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not entirely represent the technical idea of the present invention, so at the time of filing the present application, various options that can replace them are available. It should be understood that equivalents and variations may exist.

Additionally, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

Throughout the specification, when a part is said to “include” a certain element, this means that it does not exclude other elements, but may further include other elements, unless specifically stated to the contrary. Additionally, terms such as 'processor' used in the specification refer to a unit that processes at least one function or operation, and may be implemented as hardware, software, or a combination of hardware and software.

Additionally, throughout the specification, when a part is said to be "connected" to another part, this refers not only to the case where it is "directly connected" but also to the case where it is "indirectly connected" with another element in between. Includes.

In this specification, a secondary battery refers to an independent cell that has a negative electrode terminal and a positive electrode terminal and is physically separable. As an example, one pouch-type lithium polymer cell may be considered a secondary battery.

The battery operating device according to an embodiment of the present invention may be provided in a battery pack. Here, the battery pack may include a cell assembly including one or more secondary batteries. Additionally, the battery operation device may be provided with a charge/discharge switch and a fuse on a charge/discharge path that supplies charge/discharge current to the cell assembly. Here, the charge/discharge path can be connected to an external device such as a vehicle driving device to transmit power from the cell assembly.

FIG. 1 is a diagram schematically showing the functional configuration of a battery operating device according to an embodiment of the present invention, and FIG. 2 is a diagram schematically showing a configuration in which an emergency battery is connected to a battery pack and a vehicle according to an embodiment of the present invention. This is a drawing shown as .

Referring to Figures 1 and 2, the battery operation device 1 according to an embodiment of the present invention includes an emergency charge/discharge path (L1), an emergency battery 100, a failure detection unit 200, and an SOC estimation unit ( 300) and a processor 400.

The emergency charge/discharge path (L1) may be configured to be connected in parallel with the charge/discharge path (L2). For example, as shown in the configuration of FIG. 2, the charge/discharge path L2 may be connected to both ends of the battery pack P. Additionally, the emergency charging and discharging path L1 may be connected to both ends of the emergency battery 100. And, the charge/discharge path (L2) and the emergency charge/discharge path (L1) may be directly connected in parallel, as shown in the configuration of FIG. 2. Here, the charge/discharge path (L2) and the emergency charge/discharge path (L1) may be connected at a node between both ends of the battery pack (P) and both ends of the vehicle 70. In this case, as shown in the configuration of FIG. 2, the path connecting the node between both ends of the battery pack P and both ends of the vehicle 70 and both ends of the vehicle 70 may be the main path L. . Alternatively, in another embodiment of the present invention, the charge/discharge path (L2) and the emergency charge/discharge path (L1) may be connected inside the battery pack (P) at a node between the cell assembly and both ends of the battery pack.

The emergency battery 100 may be located on the emergency charge/discharge path (L1). Additionally, the emergency battery 100 may be electrically connected in parallel with the cell assembly provided in the battery pack (P). For example, the emergency battery 100 may be electrically connected in parallel with the battery pack P, as shown in the configuration of FIG. 2. Additionally, both ends of the emergency battery 100 may be directly electrically connected to both ends of the vehicle 70.

For example, the emergency battery 100 according to an embodiment of the present invention may be located outside or inside the battery pack P. More specifically, the emergency battery 100 may be mounted outside the battery pack (P). Alternatively, the emergency battery 100 may be installed inside the battery pack (P). In this case, the battery pack (P) may be attached to the outside of the battery pack (P). Additionally, the emergency battery 100 may be inserted into the battery pack (P).

Additionally, the emergency battery 100 may be configured to be removable from the battery pack (P). In this case, the emergency battery 100 can be detached from the battery pack (P) and replaced.

Additionally, the emergency battery 100 may be connected to the battery pack P through a connector. More specifically, both ends of the emergency battery 100 may be electrically connected to both ends of the battery pack P by a connector. For example, when the emergency battery 100 is mounted on the battery pack (P), the emergency battery 100 and the battery pack (P) can be connected by a connector between the emergency battery 100 and the battery pack (P). there is.

The failure detection unit 200 may be electrically connected to a charge/discharge switch and a fuse provided in the charge/discharge path (L2). Additionally, the failure detection unit 200 can detect whether the charge/discharge switch or fuse is broken. More specifically, the failure detection unit 200 may receive an electrical signal from the charge/discharge switch and the fuse, and detect whether the charge/discharge switch and the fuse are broken based on the electrical signal. For example, the failure detection unit 200 is electrically connected to both ends of the charge/discharge switch and can detect whether the charge/discharge switch is broken based on the voltage at both ends of the charge/discharge switch. Additionally, the failure detection unit 200 is electrically connected to both ends of the fuse and can detect whether the fuse is broken based on the voltage at both ends of the fuse.

The SOC estimation unit 300 may be electrically connected to the emergency battery 100. Additionally, the SOC estimator 300 may receive an electrical signal from the emergency battery 100 and estimate the amount of charge of the emergency battery 100 based on the electrical signal. For example, the SOC estimator 300 may be electrically connected to the emergency battery 100 and measure the voltage, current, and temperature of the emergency battery 100. Additionally, the SOC estimator 300 may estimate the amount of charge of the emergency battery 100 based on the voltage, current, and temperature of the emergency battery 100.

The processor 400 is electrically connected to the failure detection unit 200 and can exchange electrical signals. In addition, the processor 400 receives a failure signal from the failure detection unit 200, and receives the failure signal. Based on this, the connection relationship between the cell assembly and the emergency battery 100 and the charging/discharging path can be controlled. More specifically, the processor 400 may control the connection relationship between the cell assembly and the charge/discharge path and the connection relationship between the emergency battery 100 and the charge/discharge path based on the failure signal. For example, in the embodiment of FIG. 2 , the processor 400 may disconnect the cell assembly provided in the battery pack P and the vehicle 70 based on a failure signal. Additionally, the processor 400 may connect the connection relationship between the emergency battery 100 and the vehicle 70 based on the failure signal.

Additionally, the processor 400 may receive the charge amount of the emergency battery 100 from the SOC estimator 300 and balance the cell assembly and the emergency battery 100 based on the charge amount. For example, the processor 400 may charge the emergency battery 100 using the power of the cell assembly when the charge amount of the emergency battery 100 is less than the standard charge amount.

Preferably, the battery operating device 1 according to an embodiment of the present invention may further include a memory device 500, as shown in the configuration of FIG. 1.

The memory device 500 may store information necessary for the operation of the failure detection unit 200, SOC estimation unit 300, and processor 400 in advance. For example, the memory device 500 may store in advance the threshold value of the voltage across the charge/discharge switch and the threshold value of the voltage across the fuse. Additionally, the memory device 500 may store a voltage-SOC lookup table in advance to estimate the charge amount of the emergency battery 100. Additionally, the memory device 500 may store the standard charge amount of the emergency battery 100 in advance.

FIG. 3 is a diagram schematically showing a configuration in which an emergency charging and discharging path is connected to a charging and discharging path according to an embodiment of the present invention, and FIG. 4 is a diagram schematically showing some configurations connected to a processor according to an embodiment of the present invention. This is a schematic drawing. Additionally, in this embodiment, detailed description of parts to which the description of the previous embodiment can be similarly applied will be omitted, and the description will focus on parts where there are differences.

3 and 4, the battery operating device according to an embodiment of the present invention includes a first voltage measurement unit 113, a second voltage measurement unit 13, a first temperature measurement unit 115, and a first voltage measurement unit 115. 2 Temperature measurement unit 15, first current measurement unit 117, second current measurement unit 17, first SOC estimation unit 310, second SOC estimation unit 320, failure detection unit 200 , may include a processor 400, a memory device 500, and a higher level control device 90.

The first voltage measurement unit 113 and the second voltage measurement unit 13 may be electrically connected to both ends of the emergency cell assembly 110 and the cell assembly 10, respectively. For example, as shown in the configuration of FIGS. 3 and 4, the first voltage measurement unit 113 and the second voltage measurement unit 13 are connected to the emergency cell assembly 110 and the emergency cell assembly 110 to exchange electrical signals. Each may be electrically connected to both ends of the cell assembly 10.

Additionally, the first voltage measurement unit 113 and the second voltage measurement unit 13 may be configured to measure voltages at both ends of the emergency cell assembly 110 and the cell assembly 10. More specifically, as shown in the configuration of FIG. 4, the first voltage measurement unit 113 and the second voltage measurement unit 13 receive the emergency cell assembly 110 and both ends of the cell assembly 10. The voltage at both ends of the emergency cell assembly 110 and the cell assembly 10 can be measured based on the electrical signal. The first voltage measuring unit 113 is connected to the positive terminal of the emergency cell assembly 110 and the negative terminal of the emergency cell assembly 110, respectively, and can measure the voltage at both ends of the emergency cell assembly 110. The second voltage measuring unit 13 is connected to the positive terminal of the cell assembly 10 and the negative terminal of the cell assembly 10, respectively, and can measure the voltage at both ends of the cell assembly 10.

Preferably, the first voltage measuring unit 113 and the second voltage measuring unit 13 are electrically connected to the first SOC estimating unit 310 and the second SOC estimating unit 320 to exchange electrical signals. can be connected In addition, the first voltage measuring unit 113 and the second voltage measuring unit 13, the emergency cell assembly 110 at time intervals under the control of the first SOC estimating unit 310 and the second SOC estimating unit 320. ) and the voltage across both ends of the cell assembly 10 can be measured, respectively, and a signal indicating the magnitude of the measured voltage can be output to the first SOC estimator 310 and the second SOC estimator 320. For example, the first voltage measurement unit 113 and the second voltage measurement unit 13 may be implemented using a voltage measurement circuit commonly used in the industry.

The first temperature measurement unit 115 and the second temperature measurement unit 15 are adjacent to the emergency cell assembly 110 and the cell assembly 10, respectively, and are adjacent to the emergency cell assembly 110 and the cell assembly 10. Each measurement temperature can be measured. In addition, the first temperature measurement unit 115 and the second temperature measurement unit 15, as shown in the configuration of FIG. 4, are connected to the emergency cell assembly 110 and the cell assembly 10 to exchange electrical signals. may be respectively adjacent to and electrically connected to the emergency cell assembly 110 and the cell assembly 10, respectively. Alternatively, the first temperature measurement unit 115 and the second temperature measurement unit 15 are mounted on the emergency cell assembly 110 and the cell assembly 10, respectively, and are connected to the emergency cell assembly 110 and the cell assembly 10. Each can be electrically connected. Through this configuration, the first temperature measurement unit 115 and the second temperature measurement unit 15 can measure the temperatures of the emergency cell assembly 110 and the cell assembly 10, respectively.

Preferably, the first temperature measurement unit 115 and the second temperature measurement unit 15 may be mounted on an integrated circuit board of a battery management system (BMS). In particular, the first temperature measuring unit 115 and the second temperature measuring unit 15 may be attached to the integrated circuit board. For example, the first temperature measurement unit 115 and the second temperature measurement unit 15 may be NTC thermistors (Negative Temperature Coefficient thermistor) mounted in a shouldered form on the integrated circuit board.

Preferably, the first temperature measuring unit 115 and the second temperature measuring unit 15 are electrically connected to the first SOC estimating unit 310 and the second SOC estimating unit 320 to exchange electrical signals. Can be combined. In addition, the first temperature measurement unit 115 and the second temperature measurement unit 15 repeatedly measure the temperatures of the emergency cell assembly 110 and the cell assembly 10 at time intervals and indicate the magnitude of the measured temperature. The signal can be output to the first SOC estimator 310 and the second SOC estimator 320. For example, the first temperature measuring unit 115 and the second temperature measuring unit 15 may be implemented using a thermocouple commonly used in the industry.

The first current measurement unit 117 and the second current measurement unit 17 have an emergency charge/discharge path (L1) and a charge/discharge path (L2) connected to the emergency cell assembly 110 and the cell assembly 10, respectively. It is electrically connected to the current sensors 120 and 20 provided on the panel, and can receive electrical signals from the current sensors 120 and 20. In addition, the first current measurement unit 117 and the second current measurement unit 17 determine an emergency charge/discharge path (L1) and a charge/discharge path (L2) based on the electrical signals received from the current sensors (120, 20). It can be configured to measure the charging and discharging current flowing through each.

For example, as shown in the configuration of FIG. 4, the first current measurement unit 117 and the second current measurement unit 17 according to an embodiment of the present invention are located at both ends of the current sensors 120 and 20. can be electrically connected to each other. Here, the current sensors 120 and 20 may be electrically connected between the emergency cell assembly 110 and the negative terminal of the cell assembly 10 and the negative terminal of the battery pack, respectively. In addition, the first current measurement unit 117 and the second current measurement unit 17 measure the voltages at both ends of the current sensors 120 and 20, respectively, and charge based on the voltages at both ends of the current sensors 120 and 20. The current flowing through the discharge path (L2) can be measured. For example, the first current measurement unit 117 and the second current measurement unit 17 measure Ohm's law based on the resistance values of the current sensors 120 and 20 and the voltages across the current sensors 120 and 20. You can use to measure the current flowing through the emergency charge/discharge path (L1) and charge/discharge path (L2), respectively.

Preferably, the first current measuring unit 117 and the second current measuring unit 17 include the first SOC estimating unit 310 and the second current measuring unit 310 to transmit and receive electrical signals, as shown in the configuration of FIG. 4. 2 It can be electrically connected to the SOC estimation unit 320. In addition, the first current measurement unit 117 and the second current measurement unit 17, the emergency cell assembly 110 at time intervals under the control of the first SOC estimation unit 310 and the second SOC estimation unit 320. ) and the magnitude of the charging or discharging current of the cell assembly 10 may be repeatedly measured and a signal representing the magnitude of the measured current may be output to the first SOC estimator 310 and the second SOC estimator 320. . For example, the current sensors 120 and 20 may be implemented using Hall sensors or sense resistors commonly used in the industry.

The memory device 500 may be electrically connected to the processor 400 to exchange electrical signals. Additionally, the memory device 500 may previously store a look-up table that defines the voltage across the emergency cell assembly 110 and the amount of charging charge corresponding to the voltage across the cell assembly 10 .

The first SOC estimator 310 and the second SOC estimator 320 receive information from the voltage measurement units 113, 13, current measurement units 117, 17, and temperature measurement units 115, 15. Calculate the state of charge of the emergency cell assembly 110 and the cell assembly 10, that is, the amount of charge, using the voltage measurements, current measurements, and temperature measurements for the emergency cell assembly 110 and the cell assembly 10. This can be monitored. That is, the first SOC estimator 310 and the second SOC estimator 320 can calculate and monitor the state of charge (SOC) while the emergency cell assembly 110 and the cell assembly 10 are being charged or discharged. there is.

In one aspect of the present invention, the first SOC estimator 310 and the second SOC estimator 320 accumulate the charging current and discharging current of the emergency cell assembly 110 and the cell assembly 10 to assemble the emergency cell assembly. The state of charge of 110 and the cell assembly 10 can be estimated. Here, when the charging or discharging of the emergency cell assembly 110 and the cell assembly 10 begins, the initial value of the charging state is the opening of the emergency cell assembly 110 and the cell assembly 10 measured before the charging or discharging begins. It can be determined using voltage (OCV). For this purpose, the first SOC estimator 310 and the second SOC estimator 320 include an open-circuit voltage-charge state lookup table that defines the charge state for each open-circuit voltage, and the emergency cell assembly 110 and the cell The state of charge corresponding to the open-circuit voltage of the assembly 10 can be mapped.

In another aspect, the first SOC estimator 310 and the second SOC estimator 320 may calculate the charging state of the emergency cell assembly 110 and the cell assembly 10 using an extended Kalman filter. The extended Kalman filter refers to a mathematical algorithm that adaptively estimates the state of charge of the emergency cell assembly 110 and the cell assembly 10 using the voltage, current, and temperature of the battery cell. Here, the estimation of the state of charge using the extended Kalman filter is, as an example, Gregory L. Plett's paper "Extended Kalman filtering for battery management systems of LiPB-based HEV battery packs Parts 1, 2 and 3". (Journal of Power Source 134, 2004, p. 252-261).

The charging state of the emergency cell assembly 110 and the cell assembly 10 is determined by selectively utilizing the voltage, current, and temperature of the emergency cell assembly 110 and the cell assembly 10 in addition to the current integration method or the extended Kalman filter described above. It can also be determined by other known methods that can estimate .

Preferably, the battery operating device according to an embodiment of the present invention may include a charge/discharge switch 30, as shown in FIGS. 3 and 4.

The charge/discharge switch 30 can open and close the charge/discharge path L2 so that current flows in the direction of charging the cell assembly 10. Additionally, the charge/discharge switch 30 can open and close the charge/discharge path L2 so that current flows in the direction of discharging the cell assembly 10. For example, as shown in the configuration of FIGS. 3 and 4, the charge/discharge switch 30 is located on the charge/discharge path L2 between the positive terminal of the cell assembly 10 and the positive terminal of the battery pack. Thus, the charging and discharging path (L2) can be opened and closed.

Also, preferably, the battery operating device according to an embodiment of the present invention may include an emergency charge/discharge switch 130, as shown in FIGS. 3 and 4.

The emergency charge/discharge switch 130 may open and close the emergency charge/discharge path L1 so that current flows in the direction of charging the emergency cell assembly 110. Additionally, the emergency charge/discharge switch 130 may open and close the emergency charge/discharge path L1 so that current flows in the direction of discharging the emergency cell assembly 110. For example, as shown in the configuration of FIGS. 3 and 4, the emergency charge/discharge switch 130 connects an emergency charge/discharge path (L1) between the positive terminal of the emergency cell assembly 110 and the positive terminal of the battery pack. Located above, the emergency charging and discharging path (L1) can be opened and closed.

For example, the charge/discharge switch 30 and the emergency charge/discharge switch 130 according to an embodiment of the present invention are FET (Field Effect Transistor) devices having a gate, drain, and source terminal. It can be turned on or off depending on whether a channel is formed according to the voltage applied between the terminals. For example, the FET device may be a MOSFET (Metal Oxide Semiconductor Field Effect Transistor).

Preferably, the battery operating device according to an embodiment of the present invention may include a fuse 50, as shown in FIGS. 3 and 4.

The fuse 50 may be provided on the charge/discharge path (L2). For example, as shown in the configuration of FIGS. 3 and 4, the fuse 50 may be provided between the charge/discharge switch 30 and the positive terminal of the battery pack. For example, the fuse 50 may be an automatic circuit breaker used to prevent overcurrent from continuing to flow in a wire.

As shown in the configuration of FIG. 4, the failure detection unit 200 may be electrically connected to exchange electrical signals with the processor 400. In this case, the failure detection unit 200 may detect whether the charge/discharge switch 30 or the fuse 50 is broken and transmit whether the charge/discharge switch 30 or the fuse 50 is broken to the processor 400. there is.

Alternatively, the failure detection unit 200 according to another embodiment of the present invention may be electrically connected to the cell assembly 10 and detect whether the cell assembly 10 is broken. In this case, the failure detection unit 200 may detect whether the cell assembly 10 is broken using the voltage across both ends of the cell assembly 10 or the current flowing through the cell assembly 10.

As shown in the configuration of FIG. 3, the processor 400 is electrically connected to the charge/discharge switch 30 and the emergency charge/discharge switch 130, respectively, and is connected to the charge/discharge switch 30 and the emergency charge/discharge switch 130. ) can control each operation.

Preferably, the processor 400 according to an embodiment of the present invention, when receiving a failure signal from the failure detection unit 200, disconnects the connection between the cell assembly 10 and the charge/discharge path (L2), The connection between the emergency battery and the charging/discharging path (L2) can be connected. For example, when the processor 400 receives a failure signal from the failure detection unit 200, it turns off the charge/discharge switch 30 to disconnect the connection between the cell assembly 10 and the charge/discharge path L2. You can. Additionally, when the processor 400 receives a failure signal from the failure detection unit 200, the processor 400 may turn on the emergency charge/discharge switch 130 to establish a connection between the emergency battery and the charge/discharge path L2.

Through this configuration, the battery operation device according to an embodiment of the present invention can perform emergency operation of the vehicle using the emergency battery in the event of a battery pack failure or fire, etc.

In addition, as shown in the configuration of FIG. 4, the processor 400 is electrically connected to the first SOC estimator 310 and the second SOC estimator 320, respectively, and The charging amounts of the emergency cell assembly 110 and the cell assembly 10 may be received from the second SOC estimator 320, respectively.

Preferably, the processor 400 according to an embodiment of the present invention electrically connects the cell assembly 10 and the emergency battery when the charge amount of the emergency battery is less than a preset reference charge amount, and The emergency battery can be charged using electric power. For example, the processor 400 may periodically check the charge amount of the emergency cell assembly 110. Additionally, the processor 400 may charge the emergency cell assembly 110 using the power of the cell assembly 10 if the charge amount of the emergency cell assembly 110 is less than or equal to a preset reference charge amount.

Through this configuration, the battery operating device according to an embodiment of the present invention can extend the life of the emergency battery by maintaining the charge amount of the emergency battery at a certain level.

Preferably, the processor 400 according to an embodiment of the present invention is electrically connected to the upper control device 90 of the vehicle and can exchange electrical signals. Here, the upper control device 90 may be a vehicle ECU (Electronic Control Unit).

Preferably, the processor 400 according to an embodiment of the present invention transmits an emergency situation notification to the upper control device 90 of the vehicle when receiving a failure signal from the failure detection unit, and based on the charge amount of the emergency battery The vehicle drivable time can be calculated and the calculated vehicle drivable time can be transmitted to the upper control device 90. For example, the processor 400 may display the charge amounts of the cell assembly 10 and the emergency cell assembly 110 to the driver. Additionally, the processor 400 may display the failure status to the driver when a failure occurs in the battery pack. Additionally, the processor 400 may calculate the driving time of the vehicle capable of emergency operation based on the charge amount of the emergency battery and display it to the driver.

Through this configuration, the battery operating device according to an embodiment of the present invention allows the driver to evacuate the vehicle to a safe place through emergency operation in an emergency situation.

The battery operating device according to the present invention can be applied to BMS. That is, the BMS according to the present invention may include the battery operating device according to the present invention described above. In this configuration, at least some of the components of the battery operating device according to the present invention can be implemented by supplementing or adding functions of the components included in the conventional BMS. For example, the processor 400 and the memory device 500 of the battery management device according to the present invention may be implemented as components of a battery management system (BMS).

Additionally, the battery operating device according to the present invention may be provided in a battery pack. That is, the battery pack according to the present invention may include the battery operating device according to the present invention described above. Here, the battery pack may include one or more secondary batteries, the battery operating device, electrical components (equipped with a BMS, relay, fuse, etc.), and a case.

Figure 5 is a flowchart schematically showing a battery operation method according to an embodiment of the present invention. In Figure 5, the subject performing each step can be said to be each component of the battery operating device according to the present invention described above.

As shown in Figure 5, the battery operation method according to the present invention includes an emergency battery connection step (S100), a failure detection step (S110), an emergency battery charge amount estimation step (S120), and an emergency battery balancing step (S130). Includes.

First, in the emergency battery connection step (S100), the emergency battery can be connected so as to be electrically connected in parallel with the cell assembly. Next, in the failure detection step (S110), an electrical signal is received from the charge/discharge switch and the fuse, and whether the charge/discharge switch and the fuse is broken can be detected based on the electrical signal. Next, in the emergency battery charging amount estimation step (S120), an electrical signal may be received from the emergency battery, and the charging amount of the emergency battery may be estimated based on the electrical signal. Next, in the emergency battery balancing step (S130), the connection relationship between the cell assembly and the emergency battery and the charging and discharging path is controlled based on the failure signal received in the failure detection step, and the emergency battery estimated by the charge amount estimation step is controlled. Cell assemblies and emergency batteries can be balanced based on charge amount.

Preferably, in the emergency battery balancing step (S130) according to an embodiment of the present invention, when a failure signal is received, the connection between the cell assembly and the charging and discharging path is severed, and the connection between the emergency battery and the charging and discharging path is disconnected. Relationships can be connected.

Preferably, in the emergency battery balancing step (S130) according to an embodiment of the present invention, if the charge amount of the emergency battery is less than a preset standard charge amount, the cell assembly and the emergency battery are electrically connected and the power of the cell assembly is used. This allows you to charge the emergency battery.

Preferably, in the emergency battery balancing step (S130) according to an embodiment of the present invention, when a failure signal is received, an emergency situation notification is transmitted to the upper control device of the vehicle, and the vehicle is driven based on the charge amount of the emergency battery. By calculating the available time, the calculated vehicle driveable time can be transmitted to the upper control device.

Additionally, when the control logic is implemented as software, the processor may be implemented as a set of program modules. At this time, the program module may be stored in the memory device and executed by the processor.

In addition, at least one of the various control logics of the processor is combined, and the types of the combined control logic are not particularly limited as long as they are written in a computer-readable code system and can be accessed in a computer-readable manner. As an example, the recording medium includes at least one selected from the group including ROM, RAM, register, CD-ROM, magnetic tape, hard disk, floppy disk, and optical data recording device. Additionally, the code system can be distributed, stored and executed on computers connected to a network. Additionally, functional programs, codes, and segments for implementing the combined control logics can be easily deduced by programmers in the technical field to which the present invention pertains.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the patent claims to be described.

Meanwhile, in this specification, terms such as 'part' such as 'SOC estimation unit' and 'fault detection unit' are used, but this refers to a logical structural unit, and is a component that can or must be physically separated. It is obvious to those skilled in the art that it does not represent an element.

1: Battery operating device
10: Cell assembly
13: Second voltage measuring unit
15: Second temperature measuring unit
17: Second current measuring unit
20: current sensor
30: charge/discharge switch
50: fuse
70: vehicle
90: Upper control device
100: Emergency battery
110: Emergency cell assembly
113: First voltage measuring unit
115: First temperature measuring unit
117: First current measuring unit
120: current sensor
200: Failure detection unit
300: SOC estimation unit
310: First SOC estimation unit
320: Second SOC estimation unit
400: Processor
500: memory device
L: main path
L1: Emergency charge/discharge path
L2: charge/discharge path
P: Battery pack

Claims (10)

In a device that operates a battery with a charge/discharge switch and a fuse on a charge/discharge path that supplies charge/discharge current to the cell assembly,
an emergency charge/discharge path configured to be connected in parallel with the charge/discharge path;
an emergency battery located on the emergency charge/discharge path and configured to be electrically connected in parallel with the cell assembly;
A failure detection unit electrically connected to the charge/discharge switch and the fuse, receiving an electrical signal from the charge/discharge switch and the fuse, and configured to detect whether the charge/discharge switch and the fuse are broken based on the electrical signal. ;
an SOC estimator electrically connected to the emergency battery, configured to receive an electrical signal from the emergency battery and estimate a charge amount of the emergency battery based on the electrical signal; and
Receives a failure signal from the failure detection unit, controls the connection relationship between the cell assembly and the emergency battery and the charge/discharge path based on the failure signal, and receives the charge amount of the emergency battery from the SOC estimator. A processor configured to balance the cell assembly and the emergency battery based on the charge amount,
When receiving a failure signal from the failure detection unit, the processor transmits an emergency situation notification to the upper control device of the vehicle, calculates the vehicle driveable time based on the charge amount of the emergency battery, and calculates the vehicle driveable time based on the calculated vehicle driveable time. A battery operating device characterized in that it transmits data to the upper control device.
According to paragraph 1,
The processor, when receiving a failure signal from the failure detection unit, is configured to disconnect the connection between the cell assembly and the charging and discharging path, and connect the connection between the emergency battery and the charging and discharging path. Battery operated device.
According to paragraph 2,
The processor is configured to electrically connect the cell assembly and the emergency battery when the charge level of the emergency battery is less than a preset standard charge amount, and to charge the emergency battery using power of the cell assembly. Operating device.
delete A BMS including the battery operating device according to any one of claims 1 to 3.
A battery pack including the battery operating device according to any one of claims 1 to 3.
In a method of operating a battery with a charge/discharge switch and a fuse on a charge/discharge path that supplies charge/discharge current to the cell assembly,
Connecting an emergency battery to be electrically connected in parallel with the cell assembly;
Receiving an electrical signal from the charge/discharge switch and the fuse, and detecting whether the charge/discharge switch and the fuse are broken based on the electrical signal;
Receiving an electrical signal from the emergency battery and estimating the amount of charge of the emergency battery based on the electrical signal; and
Receive a failure signal detected by the failure detection step, control the connection relationship between the cell assembly and the emergency battery and the charge/discharge path based on the received failure signal, and control the connection relationship between the charge and discharge path estimated by the charge amount estimation step. Comprising the step of balancing the cell assembly and the emergency battery based on the charge amount of the emergency battery,
In the emergency battery balancing step, when receiving the failure signal, an emergency situation notification is transmitted to the upper control device of the vehicle, and the vehicle drivable time is calculated based on the charge amount of the emergency battery, and the calculated vehicle drivable time is calculated. A battery operation method characterized by transmitting to a higher level control device.
In clause 7,
The emergency battery balancing step, when receiving the failure signal, disconnects the connection between the cell assembly and the charging and discharging path, and connects the connection between the emergency battery and the charging and discharging path. Battery operation, characterized in that method.
According to clause 8,
In the emergency battery balancing step, if the charge amount of the emergency battery is less than a preset standard charge amount, electrically connecting the cell assembly and the emergency battery and charging the emergency battery using the power of the cell assembly. How to operate the battery.
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