WO2023238714A1 - 直流短絡保護装置 - Google Patents

直流短絡保護装置 Download PDF

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Publication number
WO2023238714A1
WO2023238714A1 PCT/JP2023/019838 JP2023019838W WO2023238714A1 WO 2023238714 A1 WO2023238714 A1 WO 2023238714A1 JP 2023019838 W JP2023019838 W JP 2023019838W WO 2023238714 A1 WO2023238714 A1 WO 2023238714A1
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WO
WIPO (PCT)
Prior art keywords
section
current
resistance
bus bar
current detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/019838
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English (en)
French (fr)
Japanese (ja)
Inventor
秀樹 岩城
英一 定行
智明 古瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2024526377A priority Critical patent/JPWO2023238714A1/ja
Priority to EP23819696.8A priority patent/EP4539283A4/en
Priority to CN202380044357.7A priority patent/CN119301725A/zh
Priority to US18/868,216 priority patent/US20260005506A1/en
Publication of WO2023238714A1 publication Critical patent/WO2023238714A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/006—Opening by severing a conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H01H2085/0266—Structural association with a measurement device, e.g. a shunt
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for DC applications

Definitions

  • the present disclosure relates to a DC short circuit protection device.
  • Patent Document 1 describes a technique for downsizing an electric circuit breaker by integrating a sensor for current detection with the electric circuit breaker.
  • the present disclosure provides a DC short circuit protection device that can suppress erroneous shutoff due to the influence of the inductance component.
  • a DC short circuit protection device includes a busbar, a fuse that disconnects the busbar in response to an ignition signal, and a first resistor that detects a current flowing through the busbar.
  • a current detection section, a second current detection section that has a second resistance section and detects the current flowing through the bus bar, a first detection signal output from the first current detection section, and a second detection signal output from the first current detection section;
  • a cutoff control circuit that outputs the ignition signal to the fuse based on the second detection signal output from the current detection section, and the first resistance section and the second resistance section It is integrated with the bus bar so that a current of the same magnitude as the current flowing through the bus bar flows, and the resistance value of the first resistance part and the resistance value of the second resistance part are different values.
  • the DC short circuit protection device According to the DC short circuit protection device according to one aspect of the present disclosure, erroneous shutoff due to the influence of the inductance component can be suppressed.
  • FIG. 1 is a configuration diagram showing an example of a DC short circuit protection device according to an embodiment. It is a perspective view of an active type fuse in a first example.
  • FIG. 3 is a partial cross-sectional view of an active type fuse in a first example. It is a perspective view of the active type fuse in a second example.
  • FIG. 7 is a partial cross-sectional view of an active type fuse in a third example. It is a partial sectional view of the active type fuse in a fourth example. It is a bottom view of the bus bar in a fourth example. It is a figure for explaining the cross-sectional structure of the bus bar in a fourth example. It is a top view of the bus bar in a fifth example.
  • FIG. 1 is a configuration diagram showing an example of a DC short circuit protection device 1 according to an embodiment.
  • the DC short circuit protection device 1 is mounted, for example, on a vehicle such as an electric vehicle that uses electric power for propulsion.
  • a vehicle such as an electric vehicle is equipped with a high-voltage battery, and power is supplied from the battery to a load such as a motor to propel the vehicle such as an electric vehicle.
  • a load such as a motor to propel the vehicle such as an electric vehicle.
  • the DC short circuit protection device 1 is provided to cut off the path. It will be done.
  • the DC short circuit protection device 1 includes an active type fuse 10 and a cutoff control circuit 20.
  • the active type fuse 10 is a device for cutting off a path connecting a battery and a load when a large current flows through the path due to a short circuit abnormality, and is, for example, a pyrofuse.
  • a pyrofuse contains gunpowder inside, and by igniting the gunpowder based on a control signal from the outside, the explosive force generated by the ignition of the gunpowder irreversibly cuts the bus bar and interrupts the current.
  • the active type fuse 10 includes a cutter 11, a bus bar 12, and a plurality of current detection sections.
  • two current sensing sections 13a and 13b are shown as the plurality of current sensing sections, but the number of the plurality of current sensing sections may be three or more.
  • the bus bar 12 is a long conductive rod that is connected (for example, fastened) to a path connecting the battery and the load and becomes a part of the path.
  • the cutting machine 11 cuts the busbar 12 in response to an ignition signal from the cutoff control circuit 20 . Since the bus bar 12 is a part of the route, the route can be cut off by cutting the bus bar 12.
  • FIG. 2 is a perspective view of an example of the active type fuse 10.
  • the current detection section 13a is a current sensor that has a resistance section 131a and detects the current flowing through the bus bar 12.
  • the current detection section 13a is an example of a first current detection section.
  • the resistance section 131a is an example of a first resistance section.
  • the current detection section 13b is a current sensor that includes a resistance section 131b and detects the current flowing through the bus bar 12.
  • the current detection section 13b is an example of a second current detection section.
  • the current detection section 13a detects the current flowing through the bus bar 12 by converting the current flowing through the resistance section 131a into a voltage.
  • the current detection section 13b detects the current flowing through the bus bar 12 by converting the current flowing through the resistance section 131b into a voltage.
  • the cutoff control circuit 20 is connected to the active type fuse 10 and cuts the bus bar 12 by controlling the active type fuse 10. Specifically, the cutoff control circuit 20 outputs the ignition signal S3 to the active type fuse 10 based on the detection signal S1 output from the current detection section 13a and the detection signal S2 output from the current detection section 13b. do. The cutting machine 11 cuts the busbar 12 when the ignition signal S3 is input.
  • the cutoff control circuit 20 is realized by, for example, a microcontroller unit (MCU).
  • the cutoff control circuit 20 includes a detection signal acquisition section 21 , a cutoff determination section 22 , a comparison section 23 , and an ignition control circuit 24 .
  • the detection signal acquisition unit 21 acquires the detection signal S1 output from the current detection unit 13a and the detection signal S2 output from the current detection unit 13b.
  • the detection signal S1 is a signal indicating a voltage generated when a current flows through a resistance section 131a included in the current detection section 13a
  • the detection signal S2 is a signal indicating a voltage generated when a current flows through a resistance section 131b included in the current detection section 13b. This signal indicates the voltage generated when
  • the cutoff determination unit 22 determines whether or not to cut off the path connecting the battery and the load based on the detection signal S1 output from the current detection unit 13a and the detection signal S2 output from the current detection unit 13b. .
  • the cutoff determination unit 22 determines whether or not to cut the bus bar 12 by performing a predetermined calculation based on the detection signal S1 output from the current detection unit 13a and the detection signal S2 output from the current detection unit 13b. to decide. Details of the predetermined calculation will be described later.
  • the comparison unit 23 compares a first current value calculated based on the detection signal S1 outputted from the current detection unit 13a and a second current value calculated based on the detection signal S2 outputted from the current detection unit 13b. Compare with. Specifically, the comparison unit 23 calculates the first current value by dividing the voltage indicated by the detection signal S1 output from the current detection unit 13a by the resistance value of the resistance unit 131a, and calculates the first current value by dividing the voltage indicated by the detection signal S1 output from the current detection unit 13a. The second current value is calculated by dividing the voltage indicated by the detection signal S2 output from the resistor section 131b by the resistance value of the resistor section 131b.
  • the comparison unit 23 detects a failure in the current detection units 13a and 13b based on the comparison result between the first current value and the second current value. For example, if the first current value and the second current value are different, the comparison unit 23 determines that one of the current detection units 13a and 13b is malfunctioning. For example, if one of the current detection units 13a and 13b is out of order, the cutoff control circuit 20 may notify an external device to that effect.
  • the ignition control circuit 24 outputs the ignition signal S3 to the active type fuse 10 when the cutoff determination unit 22 determines that the busbar 12 can be cut off. Thereby, when a large current flows through the path due to a short circuit abnormality, the bus bar 12 is cut by the active type fuse 10 and the path can be cut off.
  • FIG. 2 is a perspective view of the active type fuse 10 in the first example.
  • FIG. 3 is a partial cross-sectional view of the active type fuse 10 in the first example.
  • illustration of a cross section of the cutting machine 11 is omitted.
  • the cutting machine 11 has, for example, an ignition terminal 11a and a cutting blade 11b.
  • the ignition terminal 11a is connected to the ignition control circuit 24 of the cutoff control circuit 20.
  • the ignition signal S3 (see FIG. 1) is output from the ignition control circuit 24 to the ignition terminal 11a, the cutting machine 11 instantly pushes the cutting blade 11b downward to cut the bus bar 12.
  • the bus bar 12 is provided with a fastening portion 12a at one end in the longitudinal direction of the bus bar 12, and a fastening portion 12b is provided at the other end in the longitudinal direction of the bus bar 12.
  • the bus bar 12 is inserted in the middle of a path connecting the battery and the load, and the fastening portions 12a and 12b are fastened to the path with screws or the like. Thereby, the bus bar 12 becomes part of the above route.
  • the cut portion 121 of the bus bar 12 is a portion that is cut by the cutting blade 11b of the cutting machine 11 when the ignition signal S3 is output from the cutoff control circuit 20.
  • the resistance value of the resistance section 131a included in the current detection section 13a and the resistance value of the resistance section 131b included in the current detection section 13b are different values.
  • the resistance parts 131a and 131b are resistance elements (shunt resistance) of about several tens of microohms. As shown in FIGS. 2 and 3, the resistance parts 131a and 131b are integrated with the bus bar 12 by being inserted into the bus bar 12.
  • the resistance parts 131a and 131b are not resistive elements but are part of the bus bar 12, and are integrated with the bus bar 12 as part of the bus bar 12.
  • the current flowing through the bus bar 12 is converted into voltage, so that the current flowing through the bus bar 12 can be detected.
  • the current detection section 13a has two current monitoring terminals 132a and 133a for monitoring the current flowing through the resistance section 131a, and the resistance section 131a is located between the current monitoring terminals 132a and 133a.
  • Current monitor terminals 132a and 133a are provided on the bus bar 12 in this manner.
  • the current detection section 13b has two current monitoring terminals 132b and 133b for monitoring the current flowing through the resistance section 131b.
  • Monitor terminals 132b and 133b are provided on bus bar 12.
  • the distance between current monitor terminals 132a and 133a is approximately the same as the distance between current monitor terminals 132b and 133b.
  • the inductance component between the current monitor terminals 132a and 133a is almost the same as the inductance component between the current monitor terminals 132b and 133b.
  • the current monitor terminals 132a, 133a, 132b, and 133b are connected to the detection signal acquisition section 21 of the cutoff control circuit 20.
  • the detection signal acquisition section 21 detects the voltage between the current monitoring terminals 132a and 133a, that is, the voltage generated in the resistance section 131a when a current flows through the resistance section 131a, and the voltage between the current monitoring terminals 132b and 133b, that is, The voltage generated in the resistance part 131b when a current flows through the resistance part 131b is acquired as a detection signal.
  • the cutoff control circuit 20 executes the cutting of the bus bar 12 by performing a predetermined calculation based on the detection signal S1 output from the current detection section 13a and the detection signal S2 output from the current detection section 13b. Determine whether or not it is possible.
  • a predetermined calculation is performed by calculating the difference between the detection signal S1 output from the current detection section 13a and the detection signal S2 output from the current detection section 13b, and the resistance value of the resistance section 131a of the current detection section 13a and the current detection section 13b. includes an operation of dividing by the difference between the resistance value and the resistance value of the resistance section 131b.
  • the inductance component The current flowing through the bus bar 12 can be detected while suppressing erroneous shutoff due to influence.
  • the cutoff determination unit 22 determines to cut off the path when the current value based on the result of the predetermined calculation is equal to or greater than the predetermined value, that is, when a large current is flowing through the bus bar 12.
  • the first example shows an example in which the current detection units 13a and 13b are provided outside the casing of the active type fuse 10, at least one of the current detection units 13a and 13b is provided within the casing of the active type fuse 10. It may be.
  • the cutting machine 11 may have a plurality of cutting blades, and the bus bar 12 may be cut at a plurality of locations when the ignition signal S3 is output from the cutoff control circuit 20.
  • the DC short circuit protection device 1 includes the bus bar 12, the active type fuse 10 that disconnects the bus bar 12 in response to the ignition signal S3 (see FIG. 1), and the resistor section 131a.
  • a current detection section 13a that detects a flowing current
  • a current detection section 13b that has a resistance section 131b and detects a current that flows through the bus bar 12, and a detection signal S1 output from the current detection section 13a and a detection signal S1 output from the current detection section 13b.
  • a cutoff control circuit 20 that outputs an ignition signal S3 to the active type fuse 10 based on the detection signal S2, and the resistor parts 131a and 131b are arranged so that a current of the same magnitude as the current flowing through the bus bar 12 flows. It is integrated with the bus bar 12, and the resistance value of the resistance part 131a and the resistance value of the resistance part 131b are different values.
  • the detection signals S1 and S2 output from the current detection units 13a and 13b include such a large back electromotive voltage component. Therefore, due to this back electromotive force, the current value is detected to be larger than the original value, and erroneous shutoff may occur.
  • the cutoff control circuit 20 determines whether or not to cut the bus bar 12 by performing a predetermined calculation based on the detection signal S1 output from the current detection section 13a and the detection signal S2 output from the current detection section 13b. However, if it is determined that cutting the bus bar 12 is executable, an ignition signal may be output to the active type fuse 10.
  • the predetermined calculation is to calculate the difference between the detection signal S1 outputted from the current detection section 13a and the detection signal S2 outputted from the current detection section 13b, and the difference between the resistance value of the resistance section 131a and the resistance value of the resistance section 131b. It may also include an operation of dividing by a difference.
  • the difference between the detection signal S1 output from the current detection section 13a and the detection signal S2 output from the current detection section 13b includes the voltage generated in the resistance section 131a due to the current flowing through the bus bar 12 and the voltage generated in the resistance section 131a due to the current flowing through the bus bar 12. 131b is included.
  • the difference between the detection signal S1 output from the current detection section 13a and the detection signal S2 output from the current detection section 13b is a voltage corresponding to the difference between the resistance value of the resistance section 131a and the resistance value of the resistance section 131b.
  • the current flowing through the bus bar 12 can be detected.
  • the current detection section 13a has current monitoring terminals 132a and 133a for monitoring the current flowing through the resistance section 131a
  • the current detection section 13b has current monitoring terminals 132a and 133a for monitoring the current flowing through the resistance section 131b. It may have terminals 132b and 133b.
  • the current monitoring terminals 132a, 133a, 132b, and 133b may be provided in the current detection units 13a and 13b.
  • the DC short circuit protection device 1 further includes a first current value based on the detection signal S1 output from the current detection section 13a and a second current value based on the detection signal S2 output from the current detection section 13b.
  • the comparison unit 23 may include a comparison unit 23 for comparison, and the comparison unit 23 may detect a failure in the current detection unit 13a or 13b based on the comparison result between the first current value and the second current value.
  • the The first current value and the second current value should be the same, but if either of the current detection units 13a and 13b is out of order, the current values may be different. Therefore, when the first current value and the second current value are different, it is possible to detect that one of the current detection units 13a and 13b is out of order.
  • FIG. 4 is a perspective view of the active type fuse 10 in the second example.
  • the bus bar 12 is provided with a temperature monitoring terminal 140 for monitoring the temperature of the bus bar 12.
  • the other points are the same as the first example, so the explanation will be omitted.
  • a thermistor, thermocouple, or the like is connected to the temperature monitoring terminal 140 to monitor the temperature of the bus bar 12.
  • the temperature of the bus bar 12 is acquired by the cut-off control circuit 20 and used by the cut-off determination section 22 to calculate the current value of the current flowing through the bus bar 12 .
  • the resistance values of the resistance parts 131a and 131b change depending on the temperature, and the voltage generated in the resistance parts 131a and 131b changes accordingly. Therefore, the calculation result of the current flowing through the bus bar 12 changes depending on the temperature. Therefore, the temperature of the bus bar 12 in which the resistance parts 131a and 131b are integrated is monitored, and the detection signals or the calculated current value of the current detection parts 13a and 13b are corrected according to the temperature of the bus bar 12. , the current flowing through the bus bar 12 can be accurately detected.
  • FIG. 5 is a partial cross-sectional view of the active type fuse 10 in a third example.
  • illustration of a cross section of the cutting machine 11 is omitted.
  • illustration of the current monitor terminal is omitted.
  • the active type fuse 10 further includes a current detection section 13c (resistance section 131c).
  • the other points are the same as the first example, so the explanation will be omitted.
  • the active type fuse 10 since the active type fuse 10 includes three current detection units 13a to 13c, it is possible to identify a faulty current detection unit among the three current detection units 13a to 13c. Specifically, the current value based on the detection signal output from one of the three current detection units 13a to 13c is different from the current value based on the detection signal output from the other two current detection units. If the value is different from the current value, it can be detected that the one current detection section is out of order.
  • FIG. 5 an example is shown in which the current detection section 13c is provided inside the casing of the active type fuse 10, but two or more of the three current detection sections 13a to 13c are connected to the active type fuse 10. may be provided within the casing of the active type fuse 10, or all three current detection sections may be provided outside the casing of the active type fuse 10.
  • the bus bar 12 may be provided with a temperature monitoring terminal 140.
  • FIG. 6 is a partial cross-sectional view of the active type fuse 10 in the fourth example. In FIG. 6, illustration of a cross section of the cutting machine 11 is omitted.
  • FIG. 7 is a bottom view of the bus bar 12 in the fourth example.
  • FIG. 8 is a diagram for explaining the cross-sectional structure of the bus bar 12 in the fourth example. Note that in FIG. 8, illustration of the current monitor terminal is omitted.
  • the resistance parts 131a and 131b are part of the bus bar 12, and a part of the bus bar 12 that has been made thinner or thinner to have a higher resistance value is utilized as the resistance parts 131a and 131b.
  • the area of the cross section perpendicular to the direction in which the current flows in the resistance parts 131a and 131b of the bus bar 12 is larger than the area of the cross section perpendicular to the direction in which the current flows in the parts other than the resistance parts 131a and 131b of the bus bar 12. small.
  • the area of the cross section (the area of the BB' cross section and the area of the DD' cross section in FIG.
  • the resistive parts 131a and 131b is larger than that of the resistive parts 131a and 131b. It can be seen that the area is smaller than the area of the cross section (for example, the area of the AA' cross section and the area of the CC' cross section in FIG. 8).
  • the area of the cross section of the resistance portion 131a of the bus bar 12 perpendicular to the direction in which the current flows is different from the area of the cross section of the resistance portion 131b of the bus bar 12 perpendicular to the direction of current flow.
  • the resistance value of the resistance part 131a and the resistance value of the resistance part 131b can be set to different values.
  • the area of the cross section of the resistance part 131a (the area of the cross section BB' in FIG. 8) is different from the area of the cross section of the resistance part 131b (the area of the cross section DD' in FIG. 8). It can be seen that the resistance value of the resistance part 131a is larger than the resistance value of the resistance part 131b.
  • the cutting machine 11 for the active type fuse 10 has two cutting blades 11c and 11d, and when the ignition signal S3 is output from the ignition control circuit 24 to the ignition terminal 11a, the cutting machine 11 , the cutting blades 11c and 11d are instantly pushed downward to cut the bus bar 12.
  • the resistance portions 131a and 131b are cut portions that are cut by the cutting machine 11.
  • the cut portion of the bus bar 12 that is cut by the active type fuse 10 has a smaller cross-sectional area (for example, is constricted) than other portions of the bus bar 12 so that it can be easily cut. Therefore, the cut portion of the bus bar 12 has a higher resistance value than other portions of the bus bar 12. Therefore, the cut portion can be used as the resistance sections 131a and 131b for detecting the current flowing through the bus bar 12, and compared to the case where a resistance section for detecting the current flowing through the bus bar 12 is separately prepared, the cut portion can be used as a DC short circuit.
  • the structure of the protection device 1 can be simplified and the cost can be reduced.
  • the resistance value varies due to dimensional tolerances due to processing accuracy of the cut portions. For this reason, a calibration value for each individual may be stored in a flash memory or the like of the cutoff control circuit 20, and the current value may be corrected for each individual using the calibration value.
  • the active type fuse 10 may further include a current detection section. Further, among the two or more current detection sections included in the active type fuse 10, there may be a mixture of one in which the resistance section is a part of the bus bar 12 and one in which the resistance section is a resistance element.
  • the cut portions of the bus bar 12 are utilized as the resistance portions 131a and 131b, but the portions that are not the cut portions and have a small cross-sectional area are It may also be used as a resistance section of the detection section.
  • the bus bar 12 may be provided with a temperature monitoring terminal 140.
  • FIG. 9 is a top view of the bus bar 12 in the fifth example. Note that in FIG. 9, illustration of the current monitor terminal is omitted.
  • the shape of the resistance portion (cut portion) in the bus bar is different from the fourth example.
  • the other points are the same as the fourth example, so the explanation will be omitted.
  • the resistance value of the resistance portion varies depending on the dimensional tolerance of the cut portion, etc., but as shown in FIG. 9, the resistance portion (cut portion) is By forming the cross-sectional shape to be constant for several millimeters along the cross-section, it is possible to stably detect the current even if there are variations in resistance value due to processing accuracy.
  • the DC short circuit protection device 1 (specifically, the cutoff control circuit 20) includes the comparison section 23, but the DC short circuit protection device 1 does not include the comparison section 23. Good too.
  • the DC short circuit protection device 1 includes the cutoff control circuit 20, but the DC short circuit protection device 1 may not be provided with the cutoff control circuit 20. That is, the cutoff control circuit 20 may be provided separately from the DC short circuit protection device 1.
  • each of the current detection units 13a and 13b has a current monitoring terminal, but the current monitoring terminal does not have to be a component of the current detection units 13a and 13b.
  • a DC short circuit protection device 1 includes a bus bar 12, an active type fuse 10 that disconnects the bus bar 12 in response to an ignition signal S3, and a resistor portion 131a that allows current to flow through the bus bar 12.
  • a current detection section 13a that detects the current flowing through the bus bar 12, a current detection section 13b that has a resistance section 131b and detects the current flowing through the bus bar 12, and a detection signal S1 output from the current detection section 13a and a detection output from the current detection section 13b.
  • the resistance section 131a and the resistance section 131b are arranged so that a current of the same magnitude as the current flowing through the bus bar 12 flows. It is integrated with the bus bar 12, and the resistance value of the resistance part 131a and the resistance value of the resistance part 131a are different values.
  • the cutoff control circuit 20 performs a predetermined detection signal based on the detection signal S1 output from the current detection section 13a and the detection signal S2 output from the current detection section 13b. By performing calculations, it is determined whether or not to cut the bus bar 12, and when it is determined to cut the bus bar 12, an ignition signal S3 is output to the active type fuse 10.
  • the predetermined calculation is performed by calculating the difference between the detection signal S1 output from the current detection section 13a and the detection signal S2 output from the current detection section 13b. It includes an operation of dividing by the difference between the resistance value of the portion 131a and the resistance value of the resistance portion 131b.
  • the resistance section 131a and the resistance section 131b are part of the bus bar 12, and the direction of the current flowing through the resistance section 131a, the resistance section 131b, and the bus bar 12 is controlled.
  • the area of the cross section of the resistance part 131a perpendicular to the first direction for example, the area of the BB' cross section shown in FIG. 8
  • the area of the cross section of the resistance part 131b perpendicular to the first direction for example, the area of the section DD' shown in FIG. (area and area of cross section CC').
  • the current monitor terminals are connected to both ends of the part where the cross-sectional area is small, and the voltage generated when current flows through the part can be obtained via the current monitor terminals.
  • the part can be used as a current detection section.
  • the DC short circuit protection device 1 has an area of the cross section of the resistance portion 131a perpendicular to the first direction (for example, an area of the BB′ cross section shown in FIG. 8), and The area of the cross section of the resistance portion 131b perpendicular to (for example, the area of the cross section DD' shown in FIG. 8) is different.
  • the current monitor terminals are connected to both ends of the part where the cross-sectional area is small, and the voltage generated when current flows through the part can be obtained via the current monitor terminals.
  • the part can be used as a current detection section.
  • the current detection section 13a has current monitoring terminals 132a and 133a for monitoring the current flowing through the resistance section 131a
  • the current detection section 13b has: It has current monitoring terminals 132b and 133b for monitoring the current flowing through the resistance section 131b.
  • the voltages generated in the resistance section 131a and the resistance section 131b can be output from the current detection section 13a and the current detection section 13b, respectively, as the detection signal S1 and the detection signal S2, respectively.
  • the DC short circuit protection device 1 according to the seventh aspect of the present disclosure further includes a temperature monitor terminal that is provided on the bus bar 12 and monitors the temperature of the bus bar 12.
  • the temperature of the bus bar 12 can be monitored, and the temperature of the bus bar 12 can be used to calculate the current value.
  • the DC short circuit protection device 1 includes a first current value calculated based on the detection signal S1 output from the current detection section 13a and a detection signal output from the current detection section 13b.
  • the comparison unit 23 further includes a comparison unit 23 that compares the current value calculated based on the second current value, and the comparison unit 23 compares the current value with the current detection unit 13a based on the comparison result between the first current value and the second current value. Alternatively, it is detected whether any of the current detection units 13b is out of order.
  • the present disclosure can be applied to a device that interrupts current flowing in a current path.

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PCT/JP2023/019838 2022-06-07 2023-05-29 直流短絡保護装置 Ceased WO2023238714A1 (ja)

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EP23819696.8A EP4539283A4 (en) 2022-06-07 2023-05-29 DC SHORT CIRCUIT PROTECTION DEVICE
CN202380044357.7A CN119301725A (zh) 2022-06-07 2023-05-29 直流短路保护装置
US18/868,216 US20260005506A1 (en) 2022-06-07 2023-05-29 Dc short circuit protection device

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JPH11329190A (ja) * 1998-05-13 1999-11-30 Harness Syst Tech Res Ltd 車両の異常報知装置
US20040041682A1 (en) * 2002-08-29 2004-03-04 Pasha Brian D. Battery circuit disconnect device
WO2017030035A1 (ja) * 2015-08-20 2017-02-23 株式会社オートネットワーク技術研究所 電線保護装置
JP2020136055A (ja) 2019-02-19 2020-08-31 株式会社ダイセル 電気回路遮断装置
JP2020527930A (ja) * 2018-03-16 2020-09-10 エルジー・ケム・リミテッド 統合型スイッチング装置、および統合型スイッチング装置を含むバッテリーモニタリングおよび保護システム
JP2021097038A (ja) * 2019-12-16 2021-06-24 リテルフューズ、インコーポレイテッド 能動／受動ヒューズモジュール

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JP2011059001A (ja) * 2009-09-11 2011-03-24 Toshiba Corp 二次電池システム

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JPH11329190A (ja) * 1998-05-13 1999-11-30 Harness Syst Tech Res Ltd 車両の異常報知装置
US20040041682A1 (en) * 2002-08-29 2004-03-04 Pasha Brian D. Battery circuit disconnect device
WO2017030035A1 (ja) * 2015-08-20 2017-02-23 株式会社オートネットワーク技術研究所 電線保護装置
JP2020527930A (ja) * 2018-03-16 2020-09-10 エルジー・ケム・リミテッド 統合型スイッチング装置、および統合型スイッチング装置を含むバッテリーモニタリングおよび保護システム
JP2020136055A (ja) 2019-02-19 2020-08-31 株式会社ダイセル 電気回路遮断装置
JP2021097038A (ja) * 2019-12-16 2021-06-24 リテルフューズ、インコーポレイテッド 能動／受動ヒューズモジュール

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See also references of EP4539283A4

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US20260005506A1 (en) 2026-01-01
EP4539283A1 (en) 2025-04-16
JPWO2023238714A1 (https=) 2023-12-14

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