System and method for managing batteries

Abstract

Disclosed is a system for managing a battery, the system comprising a first processor, a second processor, an isolator, a sensor unit, a switch unit, and the like. The isolator can be disposed between the first and second processors, and the first and second processors can transmit and receive information via the isolator. The first processor can transmit monitoring request signals for multiple nodes to the second processor via the isolator, and the second processor can transmit voltage values ​​for the multiple nodes to the first processor.

Description

Technical Field

[0001] In the present disclosure, a system and method for managing a battery using one or more processors is provided. Background Art

[0002] Isolators are used when modules operating in different voltage regions are connected to each other. In particular, when a module operating in a high-voltage region and a module operating in a low-voltage region are operated in conjunction with each other, an isolator must be provided in an appropriate location to block leakage current and ensure that the operation is performed as expected.

[0003] However, due to the high cost of isolators, it is desirable to reduce the number of isolators used when configuring a product. Consequently, efforts have been made to reduce the number of isolators used when interconnecting modules operating in different voltage regions. In particular, when using high-voltage batteries, methods to reduce the number of isolators are essential when configuring a circuit to use modules operating at lower voltages. Summary of the Invention

[0004] Technical Topics

[0005] The present disclosure can provide a system and apparatus for managing batteries. Specifically, a battery management system and apparatus are provided for performing battery management using a small number of isolators. The battery management system may include a first processor, a second processor, an isolator, a sensor unit, a switch unit, etc., and the isolator may be disposed between the first and second processors.

[0006] The technical subject matter to be solved is not limited to the technical subject matter described above, and various technical subject matters may be included within a scope that is obvious to those skilled in the art.

[0007] Technical Solution

[0008] According to a first aspect, a battery management system includes: a first processor, which operates in a low voltage area; a second processor, which operates in a high voltage area; an isolator, which is arranged between the first processor and the second processor; a sensor unit, which senses the voltage for multiple nodes; and a switching unit, which is arranged between the sensor unit and the second processor, wherein the first processor sends a monitoring request signal for multiple nodes to the second processor through the isolator, wherein the second processor controls the switching unit according to the monitoring request signal to obtain voltage values ​​for multiple nodes, and wherein the second processor can send the voltage value to the first processor through the isolator.

[0009] Furthermore, the switch unit may include a plurality of switches, and the sensor unit may include a plurality of sensors corresponding to the plurality of switches.

[0010] In addition, the switching unit is controlled by the second processor and connects current to the sensor unit when the switching unit is turned on, and may cut off the current connected to the sensor unit when the switching unit is turned off.

[0011] Furthermore, the plurality of nodes may include at least one of nodes at both ends of the relay and at both ends of the fuse.

[0012] Furthermore, the relay may transmit high voltage power applied from the battery to at least one of the motor, the output terminal, and the display.

[0013] Furthermore, a ground level of the low voltage region and a ground level of the high voltage region may be different from each other, a voltage used in the low voltage region may be 12V or less, and a voltage used in the high voltage region may be 500V or less.

[0014] Furthermore, the first processor may be provided on the first substrate, and the second processor may be provided on the second substrate.

[0015] Additionally, the first processor may provide information regarding the state of charge and the state of discharge of the battery.

[0016] According to the second aspect, the method for managing a battery may include the following steps: a first processor operating in a low voltage area sends a monitoring request signal for multiple nodes to a second processor operating in a high voltage area through an isolator; the second processor obtains voltage values ​​for the multiple nodes based on the monitoring request signal; and the second processor sends the voltage values ​​to the first processor through the isolator.

[0017] A third aspect may provide a computer-readable non-transitory recording medium in which a program for implementing the method of the second aspect is recorded.

[0018] Beneficial effects

[0019] The present disclosure can provide a system and method for managing a battery. Specifically, a system for performing battery management by transmitting information using an isolator disposed between a first processor operating in a low-voltage region and a second processor operating in a high-voltage region is disclosed. The number of isolators required can be reduced by disposing the isolators in the first and second processors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1is a diagram illustrating an example in which a battery management system operates together with a battery and a BEM according to an embodiment.

[0021] Figure 2 is a block diagram illustrating an example in which a battery management system operates using a first processor and a second processor according to an embodiment.

[0022] Figure 3 is a block diagram illustrating an example in which a battery management system according to an embodiment operates using a plurality of isolators.

[0023] Figure 4 is a block diagram illustrating an example in which a battery management system operates in a low voltage region and a high voltage region according to an embodiment.

[0024] Figure 5 is a diagram illustrating an example in which a battery management system according to an embodiment operates together with a battery, a BEM, an ECU, and the like.

[0025] Figure 6 is a diagram illustrating an example of a plurality of nodes according to an embodiment.

[0026] Figure 7 is a flowchart illustrating an example in which a battery management system according to an embodiment operates using a first processor and a second processor. DETAILED DESCRIPTION

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0028] However, the technical idea of ​​the present invention is not limited to some embodiments to be described, but can be implemented in various forms, and within the scope of the technical idea of ​​the present invention, one or more of the constituent elements can be selectively combined or replaced between the embodiments.

[0029] In addition, unless explicitly defined and described, the terms (including technical terms and scientific terms) used in the embodiments of the present invention can be interpreted as meanings that can be generally understood by technicians in the field, and common terms such as terms defined in dictionaries can be interpreted in consideration of the contextual meaning of the relevant technology.

[0030] Furthermore, the terms used in this specification are for describing the embodiments and are not intended to limit the present invention.

[0031] In this specification, unless specifically stated otherwise in a phrase, a singular form may include a plural form, and when described as "at least one (or more than one) of A and B and C", it may include one or more of all combinations that can be combined with A, B and C.

[0032] In addition, when describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only intended to distinguish a component from other components, and these terms do not limit the nature, order, or sequence of the components.

[0033] Also, when a component is described as being “connected,” “coupled,” or “engaged” to another component, the component may be directly connected, coupled, or interconnected to the other component, however, it should be understood that another element may be “connected,” “coupled,” or “interconnected” between components.

[0034] In addition, when it is described as being formed or arranged "on (above)" or "under (below)" each component, "on (above)" or "under (below)" means that it includes not only a case where two components are in direct contact, but also a case where one or more other components are formed or arranged between the two components. In addition, when expressed as "on (above)" or "under (below)", it can include the meaning based on not only the upward direction but also the downward direction of one component.

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0036] Figure 1 is a diagram illustrating an example in which the battery management system 100 operates together with the battery 110 and the BEM 120 according to an embodiment.

[0037] The battery management system 100 according to an embodiment can operate in conjunction with the battery 110 and the BEM 120. The battery management system 100 can monitor the status of the battery 110 and the BEM 120. Specifically, the battery management system 100 can sense the voltages of multiple nodes connected to the battery 110 to monitor various conditions and output the monitored results. For example, when a relay or fuse does not perform normal operation, the battery management system 100 can output an alarm.

[0038] Figure 2 is a block diagram illustrating an example in which the battery management system 100 operates using the first processor 210 and the second processor 230 according to an embodiment.

[0039] like Figure 2 As shown, the battery management system 100 may include a first processor 210, an isolator 220, a second processor 230, a switch unit 240, and a sensor unit 250. The battery management system 100 according to an embodiment may include a low voltage region 201 and a high voltage region 202. The isolator 220 may connect the low voltage region 201 and the high voltage region 202.

[0040] However, those skilled in the art will appreciate that the battery management system 100 may also include other components besides Figure 2 General components other than those illustrated. For example, the battery management system 100 may further include a memory (not shown) connected to the first processor 210 or the second processor 230. The term "memory" can be broadly interpreted to include any electronic component capable of storing electronic information. The term memory can refer to various types of processor-readable media, such as random access memory (RAM), read-only memory (ROM), non-volatile random access memory (NVRAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable PROM (EEPROM), flash memory, magnetic or optical data storage devices, registers, etc. A memory is said to be in electronic communication with the first processor 210 and / or the second processor 230 if the first processor 210 and / or the second processor 230 is capable of reading information from and / or writing information to the memory. Memory integrated in the first processor 210 and / or the second processor 230 is in electronic communication with the processor.

[0041] In addition, the memory may include at least one type of storage medium among the following: flash memory type, hard disk type, micro multimedia card type, card type memory (for example, SD or XD memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, optical disk, etc.

[0042] The first processor 210 and / or the second processor 230 according to the embodiment can perform a communication function. For example, the first processor 210 and / or the second processor 230 can use a Wi-Fi chip, a Bluetooth chip, etc. to communicate with an external device, and can communicate with an internal module according to a predetermined protocol. The Wi-Fi chip and the Bluetooth chip can respectively use a Wi-Fi method and a Bluetooth method to perform communication. When using a Wi-Fi chip or a Bluetooth chip, various types of connection information such as SSID and session key can be sent and received first, and then various types of information can be sent and received after the connection information is used for communication connection. The wireless communication chip can perform communication according to various communication standards such as IEEE, ZigBee, third generation (3G), third generation partnership project (3GPP) and long term evolution (LTE). The NFC chip can operate in a near field communication (NFC) method using a 13.56MHz band among various RF-ID bands such as 135kHz, 13.56MHz, 433MHz, 860 to 960MHz and 2.45GHz. In addition, the first processor 210 and / or the second processor 230 may perform communication through a local interconnect network (LIN) bus or a LIN interface.

[0043] According to an embodiment, the first processor 210 may operate in the low voltage region 201, and the second processor 230 may operate in the high voltage region 202. In addition, an isolator 220 may be provided between the first processor 210 and the second processor 230. The isolator 220 may transmit information between the first processor 210 and the second processor 230.

[0044] The low voltage region 201 and the high voltage region 202 may operate in different voltage ranges. For example, the voltage used in the low voltage region 201 may be 0V to 12V, while the voltage used in the high voltage region 202 may be 0V to 500V. Specifically, the modules included in the high voltage region 202 may operate in a voltage range of 300V to 500V.

[0045] In addition, the ground level of the low voltage region 201 and the ground level of the high voltage region 202 may be different from each other. The ground of the low voltage region 201 and the ground of the high voltage region 202 may not be electrically connected to each other. The ground of the low voltage region 201 and the ground of the high voltage region 202 may be electrically separated.

[0046] According to an embodiment, the first processor 210 can be provided on the first substrate, and the second processor 230 can be provided on the second substrate. The module operating in the low voltage region 201 can be provided on the first substrate, and the module operating in the high voltage region 202 can be provided on the second substrate. In addition, the isolator 220 can be provided on the first substrate and / or the second substrate, and the isolator 220 can be electrically connected to the first substrate and the second substrate and simultaneously cut off the electrical connection. The isolator 220 can transmit information between the first substrate and the second substrate, but can block electrical connections other than the predetermined route. For example, the isolator 220 can block leakage current between the first substrate and the second substrate.

[0047] The isolator 220 disposed between the first processor 210 and the second processor 230 can transmit information to and from the first processor 210 and the second processor 230. Furthermore, the isolator 220 can block electrical connections other than information transmitted between the first processor 210 and the second processor 230. For example, the isolator 220 can block leakage current between the low voltage region 201 and the high voltage region 202.

[0048] The first processor 210 according to the embodiment may transmit monitoring request signals for a plurality of nodes to the second processor 230 through the isolator 220. In addition, the second processor 230 according to the embodiment controls the switch unit 240 according to the monitoring request signal to obtain voltage values ​​for the plurality of nodes, and may transmit the obtained voltage values ​​to the first processor 210 through the isolator 220.

[0049] The sensor unit 250 according to the embodiment may sense voltages for a plurality of nodes. In addition, the switch unit 240 may be provided between the sensor unit 250 and the second processor 230. The switch unit 240 may include a plurality of switches, and the sensor unit 250 may include a plurality of sensors corresponding to the plurality of switches.

[0050] The switching unit 240 according to an embodiment may be controlled by the second processor 230. In addition, the switching unit 240 may control the current applied to the sensor unit 250. For example, when the switching unit 240 is turned on, current is connected to the sensor unit 250, and when the switching unit 240 is turned off, the current connected to the sensor unit 250 may be cut off. Specifically, when the plurality of switches connected to the switching unit 240 are turned on, current may be applied to each of the plurality of sensors included in the sensor unit 250. In addition, when the plurality of switches connected to the switching unit 240 are turned on, current may be blocked in each of the plurality of sensors included in the sensor unit 250.

[0051] The plurality of nodes according to the embodiment may include at least one of the nodes at both ends of the relay and at both ends of the fuse. The relay according to the embodiment may include a module for transferring high voltage power applied from a battery to at least one of a motor, an output terminal, and a display. In addition, the fuse may include a module or device for blocking current when a current or voltage higher than a preset value is applied. Figure 6 A more specific embodiment of multiple nodes is described in .

[0052] The first processor 210 according to an embodiment may provide information on the charging state and the discharging state of the battery. For example, when the battery is fully charged or discharged, the first processor 210 may output a message indicating each situation.

[0053] refer to Figure 2 When one isolator 220 is provided between the first processor 210 and the second processor 230, the battery management system 100 can implement battery management using one isolator 220 even though the number of sensors included in the sensor unit 250 is plural and the number of switches included in the switch unit 240 is plural.

[0054] Figure 3 is a block diagram illustrating an example in which the battery management system 100 operates using a plurality of isolators according to an embodiment.

[0055] like Figure 3 As shown, the battery management system 100 may include a main MCU 310, a first isolator 320, a second isolator 340, a sensor unit 330, a multiplexer (MUX) 350, and a converter 360. The battery management system 100 according to an embodiment may include a low voltage region 301 and a high voltage region 302, and may operate in the low voltage region 301 and the high voltage region 302. The first isolator 320 and the second isolator 340 may connect the low voltage region 301 and the high voltage region 302.

[0056] The second isolator 340 may include a plurality of isolators. In addition, the plurality of isolators may be connected to the plurality of sensors included in the sensor unit 330. In addition, the multiplexer 350 may electrically connect one of the plurality of sensors included in the sensor unit 330 to the converter 360 through the plurality of isolators.

[0057] The converter 360 may perform analog-to-digital conversion. For example, the converter 360 may convert a value (e.g., a voltage value) received through the multiplexer 350 into a digital value. In addition, the converter 360 may transmit the value received through the multiplexer 350 to the main MCU 310 through the first isolator 320.

[0058] The sensor unit 330 may include multiple sensors, and these multiple sensors may sense the voltage values ​​of multiple nodes. In addition, the voltage value sensed by the sensor on the line selected by the multiplexer 350 is applied to the converter 360 through the second isolator 340 and the multiplexer 350, and the converter 360 may convert the received voltage value into a digital signal and transmit the digital signal to the main MCU 310 through the first isolator 320.

[0059] The low voltage region 301 and the high voltage region 302 may be implemented on different substrates. For example, the low voltage region 301 may be implemented in a first substrate, and the high voltage region 302 may be implemented in a second substrate. In this case, the main MCU 310 may be provided on the first substrate, and the sensor unit 330, the multiplexer 350, and the converter 360 may be provided on the second substrate. In addition, the first isolator 320 and the second isolator 340 may connect the first substrate and the second substrate. Figure 3 In the embodiment illustrated in FIG, the battery management system 100 may include a first isolator 320 and a second isolator 340, that is, a plurality of isolators. In particular, the second isolator 340 may include a plurality of isolators corresponding to the number of sensors included in the sensor unit 330.

[0060] Figure 4 is a block diagram illustrating an example in which the battery management system 100 operates in a low voltage region 401 and a high voltage region 402 according to an embodiment.

[0061] like Figure 4 As shown, the battery management system 100 may include a main MCU 410, an HV MCU 430, an isolator 420, a sensor unit 450, and a switch unit 440. The battery management system 100 according to an embodiment may include a low voltage region 401 and a high voltage region 402, and may operate in the low voltage region 401 and the high voltage region 402. The isolator 420 may connect the low voltage region 401 and the high voltage region 402.

[0062] because Figure 4 Each of the main MCU 410, the isolator 420, the HV MCU 430, the switch unit 440, and the sensor unit 450 illustrated in FIG. 4 may correspond to Figure 2 The first processor 210, the isolator 220, the second processor 230, the switch unit 240 and the sensor unit 250 disclosed in Figure 2 content.

[0063] The switch unit 440 may include a plurality of (eg, 13) MOSFETs that may operate as switches and may be controlled by the HV MCU 430 .

[0064] refer to Figure 4 , the battery management system 100 can operate using only one isolator 420. In addition, the HV MCU 430 can perform an analog-to-digital conversion function. Therefore, the HV MCU 430 can convert a signal received through the switching unit 440 (e.g., voltage values ​​for multiple nodes) into a digital signal and transmit the digital signal to the main MCU 410 through the isolator 420.

[0065] The low voltage region 401 and the high voltage region 402 may be implemented on different substrates. For example, the low voltage region 401 may be implemented in a first substrate, and the high voltage region 402 may be implemented in a second substrate. In this case, the main MCU 410 may be provided on the first substrate, and the sensor unit 450, the switch unit 440, and the HV MCU 430 may be provided on the second substrate. In addition, the isolator 420 may connect the first and second substrates.

[0066] refer to Figure 4 , due to Figure 3 Comparatively, the number of isolators to be used is reduced, so the cost of the isolators can be reduced.

[0067] Figure 5 5 is a diagram illustrating an example in which the battery management system 100 according to the embodiment operates together with the battery 510 , the BEM 520 , the ECU 530 , and the like.

[0068] like Figure 5 As shown, the battery management system 100 may include a first processor 590, an isolator 560, a second processor 570, and a measurement unit 580. The battery management system 100 according to an embodiment may include a low voltage region 550 and a high voltage region 540, and may operate in the low voltage region 550 and the high voltage region 540. The isolator 560 may connect the low voltage region 550 and the high voltage region 540.

[0069] because Figure 5 Each of the first processor 590, the isolator 560, the second processor 570, and the low voltage region 550 and the high voltage region 540 illustrated in FIG. Figure 2 The first processor 210, the isolator 220, the second processor 230, the low voltage region 201 and the high voltage region 202 disclosed in Figure 2 content.

[0070] also, Figure 5 The measurement unit 580 shown in FIG may include one or more sensors and switches. For example, since the measurement unit 580 may include Figure 2 The sensor unit 250 and the switch unit 240 are shown in FIG. Figure 2 content.

[0071] The battery management system 100 may operate by being connected with a battery 510 , a battery energy management (BEM) 520 , and an ECU 530 .

[0072] Specifically, power of the battery 510 is applied to the BEM 520, and voltage values ​​for a plurality of nodes included in the BEM 520 are sensed by the measurement unit 580 and may be transmitted to the second processor 570. The second processor 570 may transmit the voltage value sensed by the measurement unit 580 to the first processor 590 through the isolator 560. For example, when the voltage value received from the measurement unit 580 is an analog value, the second processor 570 may convert the analog voltage value into a digital value and transmit the digital value to the first processor 590.

[0073] The first processor 590 may control the ECU 530. For example, the first processor 590 may control the ECU 530 using information received from the second processor 570.

[0074] ECU 530 can control electronic modules such as the vehicle. For example, it can control the heater, power supply, real-time clock, crash ENS control, and CAN communication. In addition, ECU 530 can be controlled by a control signal received from first processor 590. For example, first processor 590 can request ECU 530 to output an alarm indicating the status of the battery (e.g., charging, discharging, and abnormality occurrence) through a signal received from second processor 570.

[0075] Figure 6 is a diagram illustrating an example of a plurality of nodes 671 to 683 according to an embodiment.

[0076] A plurality of nodes 671 to 683 may be included in some portions 690 of the BEM. Some portions 690 of the BEM include a plurality of relays 641, 642, 643, 644, 645, 646, 647, 651, 652, and 653, a plurality of fuses 631, 632, and 633, a plurality of resistors 661, 662, and 663, and a plurality of nodes 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682, and 683. Furthermore, some portions 690 of the BEM may be connected to a plurality of output terminals. The first output terminal 621, the second output terminal 622, the third output terminal 623, and the fourth output terminal 624 may each perform different operations. For example, the first output terminal 621 applies power to auxiliary equipment (Aux), the second output terminal 622 applies power to the front traction motor, the third output terminal 623 applies power to the rear traction motor, and the fourth output terminal 624 may apply power through a DC charging port.

[0077] A voltage may be applied to a plurality of nodes 671 to 683 by power applied from the battery 610. The plurality of nodes 671 to 683 according to an embodiment may include at least one of the nodes at both ends of the relays 641, 642, 643, 644, 645, 646, 647, 651, 652, and 653 and at both ends of the fuses 631, 632, and 633. The relays 641, 642, 643, 644, 645, 646, 647, 651, 652, and 653 according to an embodiment may include a module that transfers high voltage power applied from the battery 610 to at least one of the motor, the output terminal, and the display. Furthermore, the fuses 631, 632, and 633 may include a module or device that blocks current when a current or voltage higher than a preset value is applied.

[0078] Figure 7 is a flowchart illustrating an example in which the battery management system 100 operates using the first processor and the second processor according to an embodiment.

[0079] In step S710 , the first processor 210 operating in the low voltage region 201 sends monitoring request signals for a plurality of nodes to the second processor 230 operating in the high voltage region 202 through the isolator 220 .

[0080] According to an embodiment, the first processor 210 may operate in the low voltage region 201, and the second processor 230 may operate in the high voltage region 202. In addition, an isolator 220 may be provided between the first processor 210 and the second processor 230. The isolator 220 may transmit information between the first processor 210 and the second processor 230.

[0081] The low voltage region 201 and the high voltage region 202 may operate in different voltage ranges. For example, the voltage used in the low voltage region 201 may be 0V to 12V, while the voltage used in the high voltage region 202 may be 0V to 500V. Specifically, the modules included in the high voltage region 202 may operate in a voltage range of 300V to 500V.

[0082] The isolator 220 provided between the first processor 210 and the second processor 230 can transmit information to and from the first processor 210 and the second processor 230. In addition, the isolator 220 can block electrical connections other than information transmitted between the first processor 210 and the second processor 230. For example, the isolator 220 can block leakage current between the low voltage region 201 and the high voltage region 202.

[0083] The first processor 210 according to an embodiment may transmit monitoring request signals for a plurality of nodes to the second processor 230 through the isolator 220 .

[0084] Furthermore, in step S720 , according to the monitoring request signal sent in step S710 , the second processor 230 obtains voltage values ​​for a plurality of nodes.

[0085] The second processor 230 may acquire voltage values ​​for a plurality of nodes through one or more switches and one or more sensors operating in the high voltage region 202 , and the second processor 230 may convert the acquired voltage values ​​into digital signals.

[0086] In step S730, the second processor 230 transmits the voltage value to the first processor 210 through the isolator 220. At this time, the voltage value transmitted through the isolator 220 may be converted into a digital signal and transmitted.

[0087] In step S710, monitoring request signals for multiple nodes are sent to the second processor 230 through the isolator 220, and since the voltage value converted into a digital signal in step S730 is sent to the first processor 210 through the isolator 220, battery management can be performed through one isolator 220.

[0088] In addition, please refer to the above Figures 1 to 6 To understand the content described in Figure 7 method.

[0089] At the same time, the above method can be written as a program that can be executed on a computer, and the above method can be implemented in a general-purpose digital computer that uses a computer-readable recording medium to operate the program. In addition, the structure of the data used in the above method can be recorded on a computer-readable recording medium by various means. Computer-readable recording media include storage media such as magnetic storage media (for example, ROM, RAM, USB, floppy disk, hard disk, etc.), optical reading media (for example, CD-ROM, DVD, etc.).

[0090] While the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical concept or essential features. Therefore, it should be understood that the above embodiments are illustrative and non-restrictive in all aspects.

Claims

1. A battery management system comprising: a first processor configured to operate in a low voltage region; a second processor configured to operate in a high voltage region; an isolator disposed between the first processor and the second processor; a sensor unit for sensing voltages for a plurality of nodes; as well as a switch unit, the switch unit being provided between the sensor unit and the second processor, wherein the first processor sends a monitoring request signal for the plurality of nodes to the second processor via the isolator, wherein the second processor controls the switch unit to be turned on according to the monitoring request signal to obtain voltage values ​​for the plurality of nodes; wherein, when the switch unit is turned on, current is connected to the sensor unit, wherein, when the switch unit is disconnected, the current connected to the sensor unit is cut off, and The second processor sends the voltage value to the first processor through the isolator.

2. The battery management system according to claim 1, wherein: The switch unit includes a plurality of switches, and The sensor unit includes a plurality of sensors corresponding to the plurality of switches.

3. The battery management system according to claim 1, wherein: The plurality of nodes include at least one of nodes among both ends of a relay and both ends of a fuse.

4. The battery management system according to claim 3, wherein: The relay transfers high voltage power applied from the battery to at least one of the motor, the output terminal, and the display.

5. The battery management system according to claim 1, wherein: A ground level of the low voltage region and a ground level of the high voltage region are different from each other, and Here, a voltage used in the low voltage region is 12 V or less, and a voltage used in the high voltage region is 500 V or less. The battery management system according to claim 1 , wherein: The first processor is disposed on a first substrate and the second processor is disposed on a second substrate.

7. The battery management system according to claim 1, wherein: The first processor provides information regarding a state of charge and a state of discharge of a battery.

8. A battery management system comprising: a first processor configured to operate in a low voltage region; a first isolator and a second isolator, wherein the first isolator and the second isolator are used to connect the low voltage area and the high voltage area; a sensor unit comprising a plurality of sensors connected to the second isolator; a converter for performing analog-to-digital conversion; as well as a multiplexer for connecting one of the plurality of sensors to the converter via the second isolator; The converter converts the value received from the multiplexer into a digital value and transmits the digital value to the first processor through the first isolator.

9. A method for managing a battery using the battery management system according to claim 1, the method comprising the following steps: sending, by a first processor operating in a low voltage region, monitoring request signals for a plurality of nodes to a second processor operating in a high voltage region through an isolator; obtaining, by the second processor, voltage values ​​for the plurality of nodes according to the monitoring request signal; as well as The second processor sends the voltage value to the first processor through the isolator.

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