Battery voltage detection device, and battery assembly and vehicle comprising same

Abstract

A battery voltage detection device according to the present invention may comprise: a main detection unit for detecting, at every main cycle, a voltage of a corresponding battery from among a plurality of batteries; a sub detection unit for detecting the voltage of the corresponding battery separately from the main detection unit, and detecting the voltage at every sub cycle, which is shorter than the main cycle; and a control unit for determining, on the basis of voltage values of the corresponding battery detected by each of the main detection unit and the sub detection unit, whether the voltage of the corresponding battery is abnormal.

Description

Battery voltage sensing device and battery assembly including the same and vehicle

[0001] This application carries a claim of priority based on Korean Patent Application No. 10-2024-0152466 filed on October 31, 2024, and all contents disclosed in the specification and drawings of said patent application are incorporated into this application.

[0002] The present invention relates to a battery voltage sensing device and a battery assembly and a vehicle including the same, and more specifically, to a battery voltage sensing device for sensing the voltage of each of a plurality of batteries, and a battery assembly and a vehicle including the battery voltage sensing device.

[0003] Generally, a secondary battery refers to a battery capable of repeated charging and discharging, such as lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. A battery cell, which is the most basic type of secondary battery, can provide an output voltage of approximately 2.5V to 4.2V.

[0004] Recently, as these secondary batteries are applied to devices requiring high output voltage or large charging capacity, such as electric vehicles or Energy Storage Systems (ESS), battery assemblies containing multiple batteries (battery cells or battery modules) connected in series and / or parallel are being widely used.

[0005] To ensure the safety and performance of such battery assemblies, appropriate measures must be taken for batteries among those included in the assembly that exhibit abnormal voltage changes.

[0006] However, conventional Battery Management Systems (BMS) must sense and process the voltage values ​​of multiple batteries during a sensing cycle of several hundred milliseconds, making it difficult to reduce the sensing cycle. As a result, existing technology has a problem in that it cannot detect instantaneous changes in battery voltage that occur during a time of several tens of microseconds, which is shorter than the sensing cycle of the BMS.

[0007] The technical problem that the present invention aims to solve is to provide a battery voltage sensing device capable of detecting instantaneous changes in battery voltage occurring over a short period of about tens of microseconds, and a battery assembly and a vehicle including such a battery voltage sensing device.

[0008] A battery voltage sensing device according to one embodiment of the present invention comprises: a main sensing unit that senses the voltage of a corresponding battery among a plurality of batteries at a main cycle; a sub-sensing unit that senses the voltage of the corresponding battery separately from the main sensing unit, but senses it at a sub-cycle that is shorter than the main cycle by a predetermined time; and a control unit configured to determine whether the voltage of the corresponding battery is abnormal based on the voltage values ​​of the corresponding battery sensed by the main sensing unit and the sub-sensing unit, respectively.

[0009] In one embodiment, the main detection unit can transmit the first voltage value of the corresponding battery detected at each main cycle to the control unit together with the voltage value of another battery included in the plurality of batteries.

[0010] In one embodiment, the battery voltage sensing device may include a plurality of main sensing units corresponding to each of the plurality of batteries.

[0011] In one embodiment, the main sensing unit may include a first voltage value generating module configured to generate a first voltage value representing the voltage of the corresponding battery when the main cycle arrives; and a first communication module configured to transmit the first voltage value to another main sensing unit or the control unit.

[0012] In one embodiment, the sub-sensing unit may transmit the second voltage value to the control unit when the second voltage value of the corresponding battery detected at each sub-cycle does not fall within a predetermined reference range.

[0013] In one embodiment, the sub-sensor may ignore or remove the second voltage value without transmitting it to the control unit when the second voltage value falls within the reference range.

[0014] In one embodiment, the sub-sensing unit may include: a second voltage value generating module configured to generate a second voltage value representing the voltage of the corresponding battery when the sub-cycle arrives; a judgment module configured to determine whether the second voltage value falls within a predetermined reference range; and a second communication module configured to transmit the second voltage value to the control unit when it is determined that the second voltage value does not fall within the reference range, and not transmit the second voltage value to the control unit when it is determined that the second voltage value falls within the reference range.

[0015] In one embodiment, the battery voltage sensing device may include a plurality of sub-sensing units corresponding to each of the plurality of batteries.

[0016] In one embodiment, when the control unit determines that the voltage of the corresponding battery is abnormal, the detection period of the sub-detection unit detecting the voltage of the corresponding battery may be changed from the sub-period to a period shorter than the sub-period.

[0017] In one embodiment, the control unit can adjust the charge or discharge amount of the corresponding battery when it is determined that the voltage of the corresponding battery is abnormal.

[0018] A battery assembly according to another aspect of the present invention includes the battery voltage sensing device described above.

[0019] A vehicle according to another aspect of the present invention includes the battery voltage sensing device described above.

[0020] According to the present invention, while a main detection unit detects the voltage of a corresponding battery among a plurality of batteries at a main cycle, a sub-detection unit detects the voltage of the corresponding battery separately from the main detection unit, by detecting it at sub-cycles shorter than the main cycle, thereby enabling rapid detection of changes in battery voltage occurring after the arrival of the main cycle and before the arrival of the next main cycle, as well as detection of instantaneous changes in battery voltage occurring for a shorter period than the main cycle.

[0021] In addition, the sub-sensing unit is configured to directly transmit the detected voltage value of the corresponding battery to a control unit that determines whether the voltage of the corresponding battery is abnormal, but is configured not to transmit it every sub-cycle, but only when the voltage value does not fall within a predetermined standard range, thereby enabling a rapid response to the abnormal battery while reducing the communication load of the control unit.

[0022] Furthermore, a person skilled in the art to which the present invention pertains will readily understand from the following description that various embodiments according to the present invention can solve various technical problems not mentioned above.

[0023] FIG. 1 is a block diagram showing a battery voltage sensing device according to one embodiment of the present invention.

[0024] FIG. 2 is a block diagram showing the main sensing unit of a battery voltage sensing device according to one embodiment of the present invention.

[0025] FIG. 3 is a block diagram showing a sub-sensing unit of a battery voltage sensing device according to one embodiment of the present invention.

[0026] FIG. 4 is a graph showing the main cycle in which the main detection unit of a battery voltage detection device according to one embodiment of the present invention detects the voltage of the battery.

[0027] FIG. 5 is a graph showing the sub-cycle in which the sub-sensing unit of a battery voltage sensing device according to one embodiment of the present invention senses the voltage of the battery.

[0028] Figure 6 is a flowchart showing an example of voltage detection operation by the main detection unit.

[0029] Figure 7 is a flowchart showing an example of voltage detection operation by a sub-sensor.

[0030] FIG. 8 is a drawing showing a battery assembly according to one embodiment of the present invention.

[0031] FIG. 9 is a drawing showing a vehicle according to one embodiment of the present invention.

[0032] Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings to clarify solutions corresponding to the technical problems of the present invention. However, in describing the present invention, if a description of related prior art would obscure the essence of the present invention, such description may be omitted. Furthermore, terms used in this specification are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of designers, manufacturers, etc. Therefore, the definitions of terms described below should be based on the content throughout this specification.

[0033] FIG. 1 is a block diagram showing a battery voltage sensing device (100) according to one embodiment of the present invention.

[0034] As illustrated in FIG. 1, a battery voltage detection device (100) according to one embodiment of the present invention includes a main detection unit (110), a sub-detection unit (120), and a control unit (130).

[0035] The main detection unit (110) is configured to detect the voltage of a corresponding battery among a plurality of batteries B1 to Bn whenever a predetermined main cycle arrives. For example, the main detection unit 1 can detect the voltage of a corresponding battery B1 among a plurality of batteries B1 to Bn every main cycle.

[0036] In this case, the main cycle can be determined according to the number of batteries to be detected by the battery voltage detection device (100). For example, the main cycle can be determined in the range from 100 [ms] to 1000 [ms].

[0037] The battery voltage detection device (100) may include a plurality of main detection units (main detection units 1 to n) corresponding to a plurality of batteries B1 to Bn, respectively (n is an integer of 2 or more). Additionally, each main detection unit (110) may be configured to transmit the voltage value of the corresponding battery detected during each main cycle to a control unit (130) described later.

[0038] In one embodiment, each main detection unit (110) may be configured to transmit a first voltage value of a corresponding battery detected during each main cycle, together with a voltage value of another battery detected by another main detection unit, to a control unit (130).

[0039] For example, the main detection unit 1 may be configured to transmit the voltage value of the corresponding battery B1, along with the voltage values ​​of batteries B2 to Bn, which are each detected by the main detection units 2 to n, to the control unit (130).

[0040] The above sub-sensing unit (120) is configured to detect the voltage of a corresponding battery separately from the main sensing unit (110), and to detect whenever a sub-cycle shorter than the main cycle by a predetermined amount of time arrives.

[0041] For example, sub-sensing unit 1 can detect the voltage of the corresponding battery B1 at predetermined sub-cycles separately from main-sensing unit 1.

[0042] In this case, the sub-cycle may be determined to be repeated multiple times during the main cycle. For example, if the main cycle is determined to be in the range from 100 ms to 1000 ms, the sub-cycle is 10 μs or longer, 10 5 It can be determined within a range of less than [μs]. Additionally, the sub-cycle can be determined to arrive at a time as different as possible from the arrival time of the main cycle.

[0043] The battery voltage detection device (100) may include a plurality of sub-detection units (sub-detection units 1 to n) corresponding to a plurality of batteries B1 to Bn, respectively. Additionally, each sub-detection unit (120) may be configured to directly transmit the voltage value of the corresponding battery detected at each sub-cycle to a control unit (130) described later.

[0044] In one embodiment, the sub-sensing unit (120) may be configured to transmit the second voltage value of the corresponding battery detected at each sub-cycle to the control unit (130) only when the second voltage value does not fall within a predetermined reference range. Here, the reference range corresponds to the voltage range of a normal battery and may be determined experimentally.

[0045] On the other hand, if the second voltage value falls within the reference range, the sub-sensing unit (120) may be configured not to transmit the second voltage value to the control unit (130) and to ignore or remove it.

[0046] The control unit (130) is configured to determine whether the voltage of a corresponding battery is abnormal based on the voltage values ​​of the corresponding batteries detected by the main detection unit (110) and the sub detection unit (120), respectively.

[0047] For example, the control unit (130) can determine whether the voltage of the corresponding battery B1 is abnormal based on the first voltage value of the corresponding battery B1 detected by the main detection unit 1 and the second voltage value of the corresponding battery B1 detected by the sub detection unit 1.

[0048] In one embodiment, the control unit (130) may be configured to change the detection period of the sub-detection unit (120) that detects the voltage of the corresponding battery from the sub-period to a period shorter than the sub-period when it is determined that the voltage of the corresponding battery is abnormal.

[0049] For example, if the control unit (130) determines that the voltage of the corresponding battery B1 is abnormal, it can change the detection period of the sub-detection unit 1 that detects the voltage of the corresponding battery B1 from the sub-period Ts to a period Ts' that is shortened compared to the sub-period Ts.

[0050] In this way, the control unit (130) can improve the accuracy of determining the battery status by shortening the voltage detection cycle for a battery in which an abnormal voltage is detected, and by re-determining the voltage status of the battery by detecting the voltage of the battery again with the shortened voltage detection cycle.

[0051] In one embodiment, the control unit (130) may be configured to adjust the charge or discharge amount of the corresponding battery when it is determined that the voltage of the corresponding battery is abnormal.

[0052] For example, if the voltage of battery B1 is determined to be abnormal among a plurality of batteries B1 to Bn, the control unit (130) can control a charger or discharger connected to battery B1 to reduce the charging capacity of battery B1, reduce the current rate during charging or discharging of battery B1, or completely discharge battery B1.

[0053] In one embodiment, the control unit (130) may be implemented by combining hardware such as a general-purpose processor or an ASIC (Application Specific Integrated Circuit) with a software program.

[0054] FIG. 2 is a block diagram showing the main detection unit (110) of a battery voltage detection device according to one embodiment of the present invention.

[0055] As illustrated in FIG. 2, the main detection unit (110) may include a first voltage value generation module (112) and a first communication module (114).

[0056] The first voltage value generation module (112) may be configured to generate a first voltage value representing the current voltage of a corresponding battery when the main cycle arrives. To this end, the first voltage value generation module (112) may include an Analog to Digital Converter (ADC) that generates a digital voltage value from the analog voltage of a corresponding battery, and a storage medium (not shown) that stores the generated digital voltage value.

[0057] The first communication module (114) may be configured to transmit the first voltage value to another main detection unit adjacent to the main detection unit (110) or to the control unit (130).

[0058] Additionally, the first communication module (114) may be configured to receive another first voltage value transmitted from a main detection unit different from the main detection unit (110). In this case, the first communication module (114) may transmit the first voltage value and the received other first voltage value to an adjacent other main detection unit or the control unit (130).

[0059] For example, the first communication module (114) of the main detection unit 1 can transmit the first voltage value of the first battery generated by the first voltage value generation module (112) to the main detection unit 2. In this case, the main detection unit 2 can transmit the first voltage value of the second battery that it has detected, along with the first voltage value of the first battery received, to the main detection unit 3. In this way, the first communication module (114) of the last main detection unit n, which has received voltage values ​​detected by other main detection units, can transmit the first voltage value of the nth battery generated by the first voltage value generation module (112) of the main detection unit n, along with the first voltage values ​​of other batteries received, to the control unit (130).

[0060] In another embodiment, a plurality of main sensing units may each be configured to directly transmit the first voltage value they have detected to the control unit (130). In this case, the plurality of main sensing units may be configured to transmit the first voltage value at different times.

[0061] In one embodiment, the main sensing unit (110) can be implemented with at least one IC (Integrated Circuit) chip.

[0062] FIG. 3 is a block diagram showing a sub-sensing unit (120) of a battery voltage sensing device according to one embodiment of the present invention.

[0063] As illustrated in FIG. 3, the sub-sensing unit (120) may include a second voltage value generation module (122), a judgment module (124), and a second communication module (126).

[0064] The second voltage value generation module (122) may be configured to generate a second voltage value representing the voltage of a corresponding battery when the sub-cycle arrives. To this end, the second voltage value generation module (122) may include an Analog to Digital Converter (ADC) that generates a digital voltage value from the analog voltage of a corresponding battery, and a storage medium (not shown) that stores the generated digital voltage value.

[0065] The judgment module (124) may be configured to determine whether the second voltage value falls within a predetermined reference range. Additionally, the judgment module (124) may be configured to transmit the second voltage value to the control unit (130) via the second communication module (126) described later if it is determined that the second voltage value does not fall within the reference range, and to ignore or remove the second voltage value if it is determined that the second voltage value falls within the reference range.

[0066] The second communication module (126) may be configured to communicate with the control unit (130) and directly transmit the second voltage value to the control unit (130). That is, the second communication module (126) may be configured to directly transmit the second voltage value to the control unit (130) when it is determined that the second voltage value does not fall within the reference range, and not to transmit the second voltage value to the control unit (130) when it is determined that the second voltage value falls within the reference range.

[0067] In one embodiment, the sub-sensing unit (120) may be implemented as an IC chip configured separately from the main sensing unit (110).

[0068] FIG. 4 is a graph showing the main period (T) in which the main detection unit (110) of a battery voltage detection device according to one embodiment of the present invention detects the voltage of the battery.

[0069] As illustrated in FIG. 4, the main detection unit (110) of the battery voltage detection device (100) according to one embodiment of the present invention can detect the voltage of a corresponding battery among the batteries to be tested whenever a main cycle (T) arrives. In this case, the main cycle (T) can be determined in a range from 100 [ms] to 1000 [ms] depending on the number of batteries to be tested.

[0070] In this way, the main detection unit (110) can monitor the voltage change of the corresponding battery during each main cycle (T). However, if a voltage peak (Pv) occurs in the corresponding battery during a time (tb-ta) shorter than the main cycle (T), and the amount of voltage change (ΔV) of the corresponding battery increases or decreases rapidly, the main detection unit (110) may not be able to detect the voltage peak (Pv).

[0071] In this case, a sub-sensing unit (120) that detects the voltage of the corresponding battery in a sub-cycle (Ts) shorter than the main cycle (T) can detect the voltage peak (Pv) that occurs instantaneously as described above.

[0072] FIG. 5 is a graph showing the sub-period (Ts) in which the sub-sensing unit (120) of the battery voltage sensing device according to one embodiment of the present invention senses the voltage of the battery.

[0073] As illustrated in FIG. 5, a sub-sensing unit (120) of a battery voltage sensing device (100) according to an embodiment of the present invention can detect the voltage of the corresponding battery whenever a sub-cycle (Ts) arrives. In this case, the sub-cycle (Ts) may be determined to be repeated multiple times during the main cycle (T). For example, if the main cycle (T) is determined to be in the range from 100 ms to 1000 ms, the sub-cycle (Ts) may be shorter than the main cycle (T), such as 10 μs or more, 10 5 It can be determined within a range of less than [μs].

[0074] In this way, the sub-sensing unit (120) can detect the voltage peak (Pv) generated in the corresponding battery for a shorter time (tb-ta) than the main cycle (T) by detecting the voltage of the corresponding battery whenever the sub-cycle (Ts) arrives.

[0075] In one embodiment, the control unit (130) of the battery voltage detection device (100) may change the detection period of the sub-detection unit (120) to a period Ts' that is shortened from the sub-period Ts when it is determined that the voltage of the corresponding battery is abnormal.

[0076] In this way, the control unit (130) can improve the accuracy of determining the battery status by shortening the voltage detection cycle for a battery in which an abnormal voltage is detected, and by re-determining the voltage status of the battery by detecting the voltage of the battery again with the shortened voltage detection cycle.

[0077] FIG. 6 is a flowchart showing an example of a voltage detection operation by the main detection unit (110).

[0078] As shown in FIG. 6, the nth main detection unit among the plurality of main detection units detects the voltage of the nth battery among the plurality of batteries during each main cycle (S600, S610).

[0079] If the n-th battery is not the last battery, the n-th main sensor transmits the detected voltage value to the n+1-th main sensor (S620, S630). Then, the n+1-th main sensor detects the voltage of the n+1-th battery (S640).

[0080] On the other hand, if the nth battery corresponds to the last battery, the nth main sensor can transmit n voltage values, including the voltage value it detected and the voltage values ​​received from other main sensors, to the control unit (130) (S650).

[0081] The above plurality of main detection units can repeat the steps described above (S600 to S650) until a reason for discontinuing battery voltage detection, such as discontinuation of battery use or user command, occurs (S660).

[0082] FIG. 7 is a flowchart showing an example of a voltage detection operation by a sub-sensing unit (120).

[0083] As illustrated in FIG. 7, a plurality of sub-sensors each detect the voltage of a corresponding battery among a plurality of batteries whenever a sub-cycle arrives. For example, among the plurality of sub-sensors, the nth sub-sensor can detect the voltage of the nth battery among the plurality of batteries every sub-cycle (S710).

[0084] Next, the sub-sensing unit (120) determines whether the detected voltage value falls within a predetermined standard range (S720).

[0085] If the detected voltage value is determined to be within the reference range, the sub-detection unit (120) ignores or removes the detected voltage value and waits until the next sub-cycle arrives (S730).

[0086] On the other hand, if it is determined that the detected voltage value does not fall within the reference range, the sub-detection unit (120) transmits the detected voltage value to the control unit (130) (S740).

[0087] The above plurality of sub-sensors can repeat the steps described above (S710 to S740) until a reason for discontinuing battery voltage detection, such as discontinuation of battery use or user command, occurs (S750).

[0088] FIG. 8 is a drawing showing a battery assembly (10) according to one embodiment of the present invention.

[0089] As illustrated in FIG. 8, a battery assembly (10) according to one embodiment of the present invention includes a plurality of batteries (12) connected in series and / or parallel with each other, and a battery voltage sensing device (100) according to the present invention.

[0090] Each battery included in the battery assembly (10) may be implemented as a battery cell corresponding to the basic unit of charging and discharging, or as a battery module in which a plurality of battery cells are connected in series and / or parallel.

[0091] The above battery voltage detection device (100) can quickly and accurately determine the voltage status of each battery by using a main detection unit (110) and a sub detection unit (120) that operate at different cycles to detect the voltage of each battery.

[0092] The above battery voltage sensing device (100) can detect the voltage of each battery through a first sensing line (SL1) electrically connected to the positive electrode of the battery and a second sensing line (SL2) electrically connected to the negative electrode of the battery.

[0093] In addition, in one embodiment, the battery assembly (10) may include a current measuring circuit (14) and a charge / discharge management device (16).

[0094] The current measuring circuit (14) may be configured to measure the charging current and / or discharging current of a plurality of batteries (12). To this end, the current measuring circuit (14) may include a shunt resistor. The current measuring circuit (14) may transmit the measured current value to a charge / discharge management device (16) described later via a third sensing line (SL3).

[0095] The above charge / discharge management device (16) may be configured to manage the charging and discharging of a plurality of batteries (12) by referring to the voltage status of each battery detected by the battery voltage detection device (100) and the charging current and / or discharging current measured by the current measurement circuit (14). To this end, the charge / discharge management device (16) may include a charger for charging the battery, a discharger for discharging the battery, a switch or relay that electrically connects the battery to output terminals (T1, T2), etc.

[0096] The battery voltage sensing device (100) and the charge / discharge management device (16) described above can be integrated into a Battery Management System (BMS) that manages the batteries of the battery assembly (10).

[0097] FIG. 9 is a drawing showing a vehicle (2) according to one embodiment of the present invention.

[0098] As illustrated in FIG. 9, a vehicle (2) according to one embodiment of the present invention includes a battery assembly (10) that provides electric energy and a battery voltage sensing device (100) according to the present invention.

[0099] In one embodiment, the battery voltage sensing device (100) may be included in the battery assembly (10), as described with reference to FIG. 8.

[0100] Additionally, in one embodiment, the battery voltage detection device (100) may be configured to communicate with a remote server (4) via a wired and / or wireless communication network to transmit the battery voltage detection result to the server (4). To this end, the battery voltage detection device (100) may include a wireless communication unit itself or be configured to work in conjunction with a wireless communication unit provided in a vehicle.

[0101] In addition, the battery voltage detection device (100) may be configured to transmit the battery voltage detection result to the ECU (Electronic Control Unit) by linking with the ECU that controls the operation of the vehicle (2).

[0102] For reference, the battery voltage detection device (100) according to the present invention can be applied to various electric devices or electric systems that use multiple batteries in addition to vehicles, and can also be applied to an Energy Storage System (ESS).

[0103] As described above, according to the present invention, while a main sensing unit detects the voltage of a corresponding battery among a plurality of batteries at a main cycle, a sub-sensing unit detects the voltage of the corresponding battery separately from the main sensing unit, by detecting it at sub-cycles shorter than the main cycle, thereby enabling rapid detection of changes in battery voltage occurring after the arrival of the main cycle and before the arrival of the next main cycle, as well as detection of instantaneous changes in battery voltage occurring for a shorter period than the main cycle.

[0104] In addition, the sub-sensing unit is configured to directly transmit the detected voltage value of the corresponding battery to a control unit that determines whether the voltage of the corresponding battery is abnormal, but is configured not to transmit it every sub-cycle, but only when the voltage value does not fall within a predetermined standard range, thereby enabling a rapid response to the abnormal battery while reducing the communication load of the control unit.

[0105] Furthermore, it is obvious that the embodiments according to the present invention can solve various other technical problems in the relevant technical field as well as related technical fields other than those mentioned in this specification.

[0106] The present invention has been described above with reference to specific embodiments. However, those skilled in the art will clearly understand that various modified embodiments may be implemented within the technical scope of the present invention. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. That is, the true technical scope of the present invention is set forth in the claims, and all variations within the scope of equivalents should be interpreted as being included in the present invention.

[0107] [Explanation of the symbol]

[0108] 2: Vehicle

[0109] 10: Battery Assembly

[0110] 100: Battery voltage detection device

[0111] 110: Main detection unit

[0112] 112: First voltage value generation module

[0113] 114: 1st communication module

[0114] 120: Sub-sensor

[0115] 122: Second voltage value generation module

[0116] 124: Judgment Module

[0117] 126: Second communication module

[0118] 130: Control unit

Claims

1. A main detection unit that detects the voltage of a corresponding battery among multiple batteries at every main cycle; A sub-sensing unit that detects the voltage of the corresponding battery separately from the main sensing unit, and detects it at sub-cycles that are shorter by a predetermined time than the main cycle; and A battery voltage detection device comprising a control unit configured to determine whether the voltage of the corresponding battery is abnormal based on the voltage values ​​of the corresponding battery detected by the main detection unit and the sub detection unit, respectively.

2. In Paragraph 1, A battery voltage detection device characterized in that the main detection unit is configured to transmit the first voltage value of the corresponding battery, detected at each main cycle, together with the voltage value of another battery included in the plurality of batteries, to the control unit.

3. In Paragraph 1, A battery voltage sensing device characterized by including a plurality of main sensing units corresponding to each of the plurality of batteries.

4. In Paragraph 3, The above main detection unit is, A first voltage value generation module configured to generate a first voltage value representing the voltage of the corresponding battery when the above main cycle arrives; and A battery voltage sensing device characterized by including a first communication module configured to transmit the first voltage value to another main sensing unit or the control unit.

5. In Paragraph 1, A battery voltage detection device characterized in that the sub-sensing unit is configured to transmit the second voltage value to the control unit when the second voltage value of the corresponding battery detected at each sub-cycle does not fall within a predetermined reference range.

6. In Paragraph 5, A battery voltage sensing device characterized in that the sub-sensing unit is configured to ignore or remove the second voltage value without transmitting it to the control unit when the second voltage value falls within the reference range.

7. In Paragraph 1, The above sub-sensing unit is, A second voltage value generation module configured to generate a second voltage value representing the voltage of the corresponding battery when the above sub-cycle arrives; A judgment module configured to determine whether the above second voltage value falls within a predetermined standard range; and A battery voltage detection device characterized by including a second communication module configured to transmit the second voltage value to the control unit when it is determined that the second voltage value does not fall within the reference range, and not transmit the second voltage value to the control unit when it is determined that the second voltage value falls within the reference range.

8. In Paragraph 1, A battery voltage sensing device characterized by including a plurality of sub-sensing units corresponding to each of the plurality of batteries.

9. In Paragraph 1, A battery voltage detection device characterized in that, when the above control unit determines that the voltage of the corresponding battery is abnormal, the detection period of the sub-detection unit detecting the voltage of the corresponding battery is changed from the sub-period to a period shorter than the sub-period.

10. In Paragraph 1, A battery voltage detection device characterized in that the above-described control unit is configured to adjust the charge or discharge amount of the corresponding battery when it is determined that the voltage of the corresponding battery is abnormal.

11. A battery assembly comprising a battery voltage sensing device according to any one of claims 1 to 10.

12. A vehicle comprising a battery voltage sensing device according to any one of paragraphs 1 through 10.

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