System and method for managing a battery

Abstract

The invention provides a system and a method for managing a battery. Disclosed is a system for managing a battery, the system including 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 processor and the second processor, and the first processor and the second processor can transmit and receive information through the isolator. The first processor can send monitoring request signals for the plurality of nodes to the second processor through the isolator, and the second processor can send voltage values for the plurality of nodes to the first processor.

Description

[0001] This application is a divisional application of Patent Application No. 201980068209.2 (PCT / KR2019 / 008714), filed on April 15, 2021, with the title of "System and method for managing battery", which was filed on July 15, 2019. TECHNICAL FIELD

[0002] In the present disclosure, a system and method for managing a battery using one or more processors are provided. BACKGROUND

[0003] An isolator is 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 combination with each other, an isolator must be disposed in an appropriate location to block a leakage current and perform an operation as intended.

[0004] However, in the case of an isolator, since the cost is high, it is desirable to reduce the number of isolators when configuring a product. Accordingly, efforts have been made to reduce the number of isolators to be used when modules operating in different voltage regions are interconnected. In particular, when a high voltage battery is used, a method of reducing the number of isolators is necessary when a circuit is configured to use modules operating at a low voltage together. SUMMARY

[0005] TECHNICAL SUBJECT

[0006] The present disclosure can provide a system and apparatus for managing a battery. In particular, a battery management system and apparatus for performing battery management using a small number of isolators are provided. The battery management system can include a first processor, a second processor, an isolator, a sensor unit, a switching unit, etc., and can dispose the isolator between the first processor and the second processor.

[0007] The technical subject to be solved is not limited to the technical subject as described above, and can also include various technical subjects within a range apparent to those skilled in the art.

[0008] TECHNICAL SOLUTION

[0009] The battery management system according to the first aspect includes: a first processor operating in a low voltage region; a second processor operating in a high voltage region; an isolator disposed between the first processor and the second processor; a sensor unit sensing voltages for a plurality of nodes; and a switching unit disposed between the sensor unit and the second processor, wherein the first processor transmits a monitoring request signal for the plurality of nodes to the second processor through the isolator, wherein the second processor controls the switching unit to obtain voltage values for the plurality of nodes according to the monitoring request signal, and wherein the second processor can transmit the voltage values to the first processor through the isolator.

[0010] Further, the switching unit can include a plurality of switches, and the sensor unit can include a plurality of sensors corresponding to the plurality of switches.

[0011] Further, the switching unit is controlled by the second processor, and connects a current to the sensor unit when the switching unit is turned on, and can cut off the current connected to the sensor unit when the switching unit is turned off.

[0012] Further, the plurality of nodes can include at least one among nodes at both ends of a relay and at both ends of a fuse.

[0013] Further, the relay can transmit high voltage power applied from the battery to at least one among a motor, an output terminal, and a display.

[0014] Further, a ground level of the low voltage region and a ground level of the high voltage region can be different from each other, a voltage used in the low voltage region can be 12V or less, and a voltage used in the high voltage region can be 500V or less.

[0015] Further, the first processor can be disposed on a first substrate, and the second processor can be disposed on a second substrate.

[0016] Further, the first processor can provide information about a charging state and a discharging state of the battery.

[0017] The method for managing a battery according to the second aspect can include the steps of: transmitting, by a first processor operating in a low voltage region, a monitoring request signal 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; and transmitting, by the second processor, the voltage values to the first processor through the isolator.

[0018] The third aspect can provide a computer-readable non-transitory recording medium in which a program for implementing the method of the second aspect is recorded.

[0019] Advantageous Effects

[0020] 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 required isolators can be reduced by being disposed in the first processor and the second processor. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a diagram illustrating an example in which a battery management system according to an embodiment operates with a battery and a BEM.

[0022] Figure 2 is a block diagram illustrating an example in which a battery management system according to an embodiment operates using a first processor and a second processor.

[0023] 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.

[0024] Figure 4 is a block diagram illustrating an example in which a battery management system according to an embodiment operates in a low voltage region and a high voltage region.

[0025] Figure 5 is a diagram illustrating an example in which a battery management system according to an embodiment operates with a battery, a BEM, an ECU, etc.

[0026] Figure 6 is a diagram illustrating an example of a plurality of nodes according to an embodiment.

[0027] 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

[0028] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0029] 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 substituted between embodiments.

[0030] Also, unless explicitly defined and described, the terms used in the embodiments of the present application, including technical and scientific terms, can be interpreted as meanings that can be commonly understood by those skilled in the art, and common terms such as those defined in a dictionary can be interpreted in the context of relevant technology.

[0031] Also, the terms used in the present specification are used to describe the embodiments, and are not intended to limit the present application.

[0032] In the present specification, the singular form can include the plural form unless specifically stated in the phrase in the singular form, and when described as "at least one of A, B, and C (or more than one of)", it can include one or more of all combinations that can be combined with A, B, and C.

[0033] Also, in describing components of the embodiments of the present application, terms such as first, second, A, B, (a), and (b) can be used. These terms are merely intended to distinguish a component from other components, and the terms do not limit the nature, order or sequence of the component.

[0034] Also, when a component is described as being "connected", "coupled", or "joined" to another component, the component can be directly connected, coupled, or interconnected to the other component, however, it should be understood that another element can be "connected", "coupled", or "interconnected" between the components.

[0035] Also, when described as being formed or disposed "on (over)" or "under" each component, "on (over)" or "under" means that it not only includes a case in which two components directly contact each other, but also includes a case in which one or more other components are formed or disposed between the two components. Also, when expressed as "on (over)" or "under", it can include a meaning based on one component not only in an upward direction but also in a downward direction.

[0036] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0037] Figure 1 is a diagram illustrating an example in which the battery management system 100 according to an embodiment operates together with the battery 110 and the BEM 120.

[0038] 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 states of the battery 110 and the BEM 120. Specifically, the battery management system 100 can sense the voltage of a plurality of nodes connected to the battery 110 to monitor various states, and can output the monitored results. For example, when a relay or a fuse does not perform normal operation, the battery management system 100 can output an alarm.

[0039] Figure 2 is a block diagram illustrating an example in which the battery management system 100 according to an embodiment operates using the first processor 210 and the second processor 230.

[0040] As Figure 2 illustrated, the battery management system 100 can include the first processor 210, the isolator 220, the second processor 230, the switching unit 240, and the sensor unit 250. The battery management system 100 according to an embodiment can include a low-voltage region 201 and a high-voltage region 202. The isolator 220 can connect the low-voltage region 201 and the high-voltage region 202.

[0041] However, those skilled in the art will understand that general components other than the components Figure 2 illustrated can also be included in the battery management system 100. For example, the battery management system 100 can also include a memory (not shown) connected to the first processor 210 or the second processor 230. The term "memory" can be interpreted broadly 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, 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.

[0042] In addition, the memory can include at least one type of storage medium among a flash memory type, a hard disk type, a micro multimedia card type, a card type memory (for example, an SD or XD memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read only memory (ROM), an electrically erasable programmable read only memory (EEPROM), a programmable read only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, etc.

[0043] The first processor 210 and / or the second processor 230 according to an embodiment can perform a communication function. For example, the first processor 210 and / or the second processor 230 can communicate with an external device using a Wi-Fi chip, a Bluetooth chip, etc., and can communicate with internal modules according to a predetermined protocol. The Wi-Fi chip and the Bluetooth chip are capable of performing communication using a Wi-Fi method and a Bluetooth method, respectively. When using the Wi-Fi chip or the Bluetooth chip, various types of connection information such as an SSID and a session key can be first transmitted and received, and then various types of information can be transmitted and received after a communication connection using the connection information. The wireless communication chip can perform communication according to various communication standards such as IEEE, ZigBee, the third generation (3G), the third generation partnership project (3GPP), and long term evolution (LTE). The NFC chip is capable of operating in a near field communication (NFC) method using a 13.56 MHz band among various RF-ID frequency bands such as 135 kHz, 13.56 MHz, 433 MHz, 860 to 960 MHz, and 2.45 GHz. In addition, the first processor 210 and / or the second processor 230 can perform communication through a local interconnect network (LIN) bus or a LIN interface.

[0044] The first processor 210 according to an embodiment can operate in a low voltage region 201, and the second processor 230 can operate in a high voltage region 202. In addition, an isolator 220 can be disposed between the first processor 210 and the second processor 230. The isolator 220 can transmit information to each other between the first processor 210 and the second processor 230.

[0045] The low voltage region 201 and the high voltage region 202 can operate in different voltage ranges. For example, a voltage used in the low voltage region 201 can be 0 V to 12 V, and a voltage used in the high voltage region 202 can be 0 V to 500 V. Specifically, a voltage range in which modules included in the high voltage region 202 operate can be 300 V to 500 V.

[0046] In addition, the ground of the low voltage area 201 and the ground of the high voltage area 202 can be different from each other. The ground of the low voltage area 201 and the ground of the high voltage area 202 can not be electrically connected to each other. The ground of the low voltage area 201 and the ground of the high voltage area 202 can be electrically separated.

[0047] According to an embodiment, the first processor 210 can be disposed on a first substrate, and the second processor 230 can be disposed on a second substrate. Modules operating in the low voltage area 201 can be disposed on the first substrate, and modules operating in the high voltage area 202 can be disposed on the second substrate. In addition, the isolator 220 can be disposed on the first substrate and / or the second substrate, and the isolator 220 can electrically connect 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 an electrical connection except for a predetermined route. For example, the isolator 220 can block a leakage current between the first substrate and the second substrate.

[0048] The isolator 220 disposed between the first processor 210 and the second processor 230 can transmit information to each other between the first processor 210 and the second processor 230. In addition, the isolator 220 can block an electrical connection except for information transmitted between the first processor 210 and the second processor 230. For example, the isolator 220 can block a leakage current between the low voltage area 201 and the high voltage area 202.

[0049] The first processor 210 according to an embodiment can transmit a monitoring request signal for a plurality of nodes to the second processor 230 through the isolator 220. In addition, the second processor 230 according to an embodiment controls the switch unit 240 to obtain voltage values for the plurality of nodes according to the monitoring request signal, and can transmit the obtained voltage values to the first processor 210 through the isolator 220.

[0050] The sensor unit 250 according to an embodiment can sense voltages for a plurality of nodes. In addition, the switch unit 240 can be disposed between the sensor unit 250 and the second processor 230. The switch unit 240 can include a plurality of switches, and the sensor unit 250 can include a plurality of sensors corresponding to the plurality of switches.

[0051] The switch unit 240 according to an embodiment can be controlled by the second processor 230. Also, the switch unit 240 can control a current applied to the sensor unit 250. For example, when the switch unit 240 is turned on, a current is connected to the sensor unit 250, and when the switch unit 240 is turned off, the current connected to the sensor unit 250 can be cut off. Specifically, when a plurality of switches connected to the switch unit 240 are turned on, a current can be applied to each of a plurality of sensors included in the sensor unit 250. Also, when a plurality of switches connected to the switch unit 240 are turned on, a current can be blocked in each of a plurality of sensors included in the sensor unit 250.

[0052] The plurality of nodes according to an embodiment can include at least one of nodes at both ends of a relay and at both ends of a fuse. The relay according to an embodiment can include a module that transfers high-voltage power applied from a battery to at least one of a motor, an output terminal, and a display. Also, the fuse can include a module or a device that blocks a current when a current or a voltage higher than a preset value is applied. More specific embodiments of the plurality of nodes will be described later in Figure 6

[0053] The first processor 210 according to an embodiment can provide information about a charging state and a discharging state of a battery. For example, when the battery is fully charged or discharged, the first processor 210 can output a message indicating each case.

[0054] Referring to Figure 2 When one isolator 220 is disposed between the first processor 210 and the second processor 230, although 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, the battery management system 100 can implement battery management with one isolator 220.

[0055] Figure 3 is a block diagram illustrating an example in which the battery management system 100 according to an embodiment operates using a plurality of isolators.

[0056] As Figure 3 illustrated, the battery management system 100 can 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 can include a low-voltage region 301 and a high-voltage region 302, and can operate in the low-voltage region 301 and the high-voltage region 302. The first isolator 320 and the second isolator 340 can connect the low-voltage region 301 and the high-voltage region 302.

[0057] ​The second isolator 340 can include a plurality of isolators. Also, the plurality of isolators can be connected to a plurality of sensors included in the sensor unit 330. In addition, the multiplexer 350 can electrically connect one of the plurality of sensors included in the sensor unit 330 to the converter 360 through the plurality of isolators.

[0058] The converter 360 can perform analog-to-digital conversion. For example, the converter 360 can convert a value (e.g., a voltage value) received through the multiplexer 350 into a digital value. In addition, the converter 360 can transmit the value received through the multiplexer 350 to the main MCU 310 through the first isolator 320.

[0059] The sensor unit 330 can include a plurality of sensors, and the plurality of sensors can sense voltage values of a plurality of nodes. Also, the voltage values sensed by the sensors on the line selected by the multiplexer 350 are applied to the converter 360 through the second isolator 340 and the multiplexer 350, and the converter 360 can convert the received voltage values into a digital signal and transmit the digital signal to the main MCU 310 through the first isolator 320.

[0060] The low-voltage region 301 and the high-voltage region 302 can be implemented on different substrates. For example, the low-voltage region 301 can be implemented in a first substrate, and the high-voltage region 302 can be implemented in a second substrate. In this case, the main MCU 310 can be disposed on the first substrate, and the sensor unit 330, the multiplexer 350, and the converter 360 can be disposed on the second substrate. In addition, the first isolator 320 and the second isolator 340 can connect the first substrate and the second substrate. According to Figure 3 According to the embodiment illustrated in FIG. 1, the battery management system 100 can include the first isolator 320 and the second isolator 340, i.e., a plurality of isolators. In particular, the second isolator 340 can include a plurality of isolators corresponding to the number of the plurality of sensors included in the sensor unit 330.

[0061] Figure 4 FIG. 4 is a block diagram illustrating an example in which a battery management system 100 according to an embodiment operates in a low-voltage region 401 and a high-voltage region 402.

[0062] As Figure 4 illustrated, the battery management system 100 can include a main MCU 410, an HV MCU 430, an isolator 420, a sensor unit 450, and a switching unit 440. The battery management system 100 according to an embodiment can include a low-voltage region 401 and a high-voltage region 402, and can operate in the low-voltage region 401 and the high-voltage region 402. The isolator 420 can connect the low-voltage region 401 and the high-voltage region 402.

[0063] Since Figure 4 each of the main MCU 410, the isolator 420, the HV MCU 430, the switching unit 440, and the sensor unit 450 illustrated in FIG. 4 can correspond to the first processor 210, the isolator 220, the second processor 230, the switching unit 240, and the sensor unit 250 disclosed in Figure 2 , respectively, reference can be made to the contents of Figure 2 .

[0064] The switching unit 440 can include a plurality (e.g., 13) of MOSFETs. The plurality of MOSFETs can operate as switches and can be controlled by the HV MCU 430.

[0065] Referring 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. Accordingly, the HV MCU 430 can convert a signal (e.g., a voltage value for a plurality of nodes) received through the switching unit 440 into a digital signal and transmit the digital signal to the main MCU 410 through the isolator 420.

[0066] The low-voltage region 401 and the high-voltage region 402 can be implemented on different substrates. For example, the low-voltage region 401 can be implemented in a first substrate, and the high-voltage region 402 can be implemented in a second substrate. In this case, the main MCU 410 can be disposed on the first substrate, and the sensor unit 450, the switching unit 440, and the HV MCU 430 can be disposed on the second substrate. In addition, the isolator 420 can connect the first substrate and the second substrate.

[0067] Referring to Figure 4 , since the number of isolators to be used is reduced compared to Figure 3 , the cost of the isolators can be reduced.

[0068] Figure 5 is a diagram illustrating an example in which the battery management system 100 according to an embodiment operates together with a battery 510, a BEM 520, an ECU 530, and the like.

[0069] As illustrated in Figure 5 , the battery management system 100 can 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 can include a low-voltage region 550 and a high-voltage region 540, and can operate in the low-voltage region 550 and the high-voltage region 540. The isolator 560 can connect the low-voltage region 550 and the high-voltage region 540.

[0070] Since Figure 5 the first processor 590, the isolator 560, and the second processor 570 illustrated in FIG. 5 and each of the low-voltage region 550 and the high-voltage region 540 can correspond to 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 FIG. 2, reference can be made to Figure 2 .

[0071] In addition, Figure 5 the measurement unit 580 illustrated in FIG. 5 can include one or more sensors and switches. For example, since the measurement unit 580 can include Figure 2 the sensor unit 250 and the switch unit 240 illustrated in FIG. 2, reference can be made to Figure 2 .

[0072] The battery management system 100 can operate by being connected with the battery 510, a battery energy management (BEM) 520, and an ECU 530.

[0073] Specifically, the power of the battery 510 is applied to the BEM 520, and the voltage values for a plurality of nodes included in the BEM 520 are sensed by the measurement unit 580 and can be transmitted to the second processor 570. The second processor 570 can transmit the voltage values sensed by the measurement unit 580 to the first processor 590 through the isolator 560. For example, when the voltage values received from the measurement unit 580 are analog values, the second processor 570 can convert the analog voltage values into digital values and transmit the digital values to the first processor 590.

[0074] The first processor 590 can control the ECU 530. For example, the first processor 590 can control the ECU 530 using information received from the second processor 570.

[0075] The ECU 530 can control electronic modules such as a vehicle, etc. For example, it can control a heater, a power source, a real-time clock, a crash ENS control, and CAN communication. In addition, the ECU 530 can be controlled by a control signal received from the first processor 590. For example, the first processor 590 can request the ECU 530 to output an alarm indicating a state of the battery (e.g., charging, discharging, and abnormality occurrence) through a signal received from the second processor 570.

[0076] Figure 6 is a diagram illustrating an example of a plurality of nodes 671 to 683 according to an embodiment.

[0077] A plurality of nodes 671 to 683 can be included in some parts 690 of the BEM. The some parts 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. Also, the some parts 690 of the BEM can 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 can each perform a different operation. For example, the first output terminal 621 applies power to an auxiliary device (Aux), the second output terminal 622 applies power to a front traction motor, the third output terminal 623 applies power to a rear traction motor, and the fourth output terminal 624 can apply power through a DC charging port.

[0078] A voltage can be applied to the plurality of nodes 671 to 683 by power applied from the battery 610. The plurality of nodes 671 to 683 according to an embodiment can include at least one of nodes among both ends of the relays 641, 642, 643, 644, 645, 646, 647, 651, 652, and 653 and 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 can include a module that transfers high-voltage power applied from the battery 610 to at least one of a motor, an output terminal, and a display. Also, the fuses 631, 632, and 633 can include a module or a device that blocks a current when a current or a voltage higher than a preset value is applied.

[0079] Figure 7 is a flowchart illustrating an example in which the battery management system 100 according to an embodiment operates using a first processor and a second processor.

[0080] In step S710, the first processor 210 operating in the low-voltage region 201 transmits a monitoring request signal for a plurality of nodes to the second processor 230 operating in the high-voltage region 202 through the isolator 220.

[0081] The first processor 210 according to an embodiment can operate in the low-voltage region 201, and the second processor 230 can operate in the high-voltage region 202. Also, the isolator 220 can be disposed between the first processor 210 and the second processor 230. The isolator 220 can transmit information to each other between the first processor 210 and the second processor 230.

[0082] The low-voltage region 201 and the high-voltage region 202 can operate in different voltage ranges. For example, the voltage used in the low-voltage region 201 can be 0V to 12V, and the voltage used in the high-voltage region 202 can be 0V to 500V. Specifically, the voltage range in which the modules included in the high-voltage region 202 operate can be 300V to 500V.

[0083] The isolator 220 disposed between the first processor 210 and the second processor 230 can transmit information between the first processor 210 and the second processor 230. In addition, the isolator 220 can block electrical connection except for the information transmitted between the first processor 210 and the second processor 230. For example, the isolator 220 can block a leakage current between the low-voltage region 201 and the high-voltage region 202.

[0084] The first processor 210 according to an embodiment can transmit a monitoring request signal for a plurality of nodes to the second processor 230 through the isolator 220.

[0085] In addition, in step S720, the second processor 230 acquires voltage values for a plurality of nodes according to the monitoring request signal transmitted in step S710.

[0086] The second processor 230 can 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 can convert the acquired voltage values into digital signals.

[0087] In step S730, the second processor 230 transmits the voltage values to the first processor 210 through the isolator 220. At this time, the voltage values transmitted through the isolator 220 can be converted into digital signals and transmitted.

[0088] In step S710, the monitoring request signal for a plurality of nodes is transmitted to the second processor 230 through the isolator 220, and since the voltage values converted into digital signals in step S730 are transmitted to the first processor 210 through the isolator 220, battery management can be performed through one isolator 220.

[0089] In addition, the method of Figures 1 to 6 may be understood with reference to the above description of Figure 7 .

[0090] Meanwhile, the above-described method can be written as a program executable on a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium. In addition, the structure of data used in the above-described method can be recorded on a computer-readable recording medium by various means. The computer-readable recording medium includes storage media such as magnetic storage media (e.g., ROM, RAM, USB, floppy disk, hard disk, etc.), optical reading media (e.g., CD-ROM, DVD, etc.).

[0091] Embodiments of the present application have been described above with reference to the accompanying drawings, but it will be appreciated by those skilled in the art that the present application can be realized in other specific forms without changing the technical idea or essential characteristics. Therefore, it should be understood that the above-described embodiments are illustrative and non-limiting in all aspects.

Claims

1. A battery management system comprising: a first processor for operating in a low voltage region; a second processor for operating in a high voltage region; one isolator disposed between the first processor and the second processor; wherein the first processor transmits a monitoring request signal for a plurality of nodes to the second processor through the isolator, wherein the second processor obtains voltage values for the plurality of nodes according to the monitoring request signal, wherein the second processor transmits the voltage values to the first processor through the isolator.

2. The battery management system of claim 1, further comprising: a measurement unit for sensing voltages for the plurality of nodes.

3. The battery management system of claim 2, wherein, The measurement unit comprises: a sensor unit for sensing voltages for the plurality of nodes; and a switch unit disposed between the sensor unit and the second processor.

4. The battery management system of claim 3, wherein, When the switch unit is turned on, a current is connected to the sensor unit, wherein when the switch unit is turned off, the current connected to the sensor unit is cut off.

5. The battery management system of claim 3, wherein, The switch unit comprises a plurality of switches, and wherein the sensor unit comprises a plurality of sensors corresponding to the plurality of switches.

6. The battery management system of claim 1, wherein, The plurality of nodes comprises at least one of an end of a relay and an end of a fuse.

7. The battery management system of claim 1, wherein, The relay transfers high voltage power applied from a battery to at least one of a motor, an output terminal, and a display.

8. The battery management system of 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 wherein a voltage used in the low voltage region is 12V or less, and a voltage used in the high voltage region is 500V or less.

9. The battery management system of claim 1, wherein, The first processor is disposed on a first substrate and the second processor is disposed on a second substrate.

10. The battery management system of claim 1, wherein, The first processor provides information on a charge state and a discharge state of a battery.

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