WO2014046028A1 - Circuit de mesure de résistance interne de batterie empilée - Google Patents

Circuit de mesure de résistance interne de batterie empilée Download PDF

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Publication number
WO2014046028A1
WO2014046028A1 PCT/JP2013/074811 JP2013074811W WO2014046028A1 WO 2014046028 A1 WO2014046028 A1 WO 2014046028A1 JP 2013074811 W JP2013074811 W JP 2013074811W WO 2014046028 A1 WO2014046028 A1 WO 2014046028A1
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WO
WIPO (PCT)
Prior art keywords
circuit
internal resistance
current
substrate
laminated
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Application number
PCT/JP2013/074811
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English (en)
Japanese (ja)
Inventor
酒井　政信
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日産自動車株式会社
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Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to JP2014536825A priority Critical patent/JP6036836B2/ja
Publication of WO2014046028A1 publication Critical patent/WO2014046028A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables

Definitions

  • the present invention relates to an internal resistance measurement circuit for a laminated battery.
  • a circuit board that is connected to a voltage detection line for detecting the voltage of a plurality of stacked single cells and on which a processing circuit for monitoring and processing the cell voltage is mounted is known (JP 2004-127776A).
  • a current is applied to a laminated battery configured by laminating a plurality of single cells, and the internal resistance of the laminated battery is measured based on the potential of the predetermined part of the laminated battery to which the current is applied and the applied current.
  • a magnetic field line of magnetic force generated from the circuit to which current is applied acts on the detection voltage of the internal resistance measurement circuit, resulting in an error.
  • An object of the present invention is to make it difficult for a magnetic field generated from a circuit to which a current is applied to affect the detection value of the internal resistance measurement circuit in a circuit that measures the internal resistance of the laminated battery by applying a current to the laminated battery.
  • An internal resistance measuring circuit of a laminated battery applies a current to a laminated battery configured by laminating a plurality of single cells, and applies a potential of a predetermined portion of the laminated battery to which the current is applied and the applied voltage. Based on the current, the internal resistance of the laminated battery is measured.
  • the magnetic flux from the source circuit to the sense circuit is between the source circuit that applies current to the multilayer battery and the sense circuit that measures the potential of a predetermined portion of the multilayer battery to which the current is applied.
  • the shielding part for shielding was provided.
  • FIG. 1A is a perspective view illustrating a fuel cell as an example of a laminated battery to which the internal resistance measurement circuit of the laminated battery in the first embodiment is applied.
  • FIG. 1B is an exploded view showing the internal structure of the fuel cell shown in FIG. 1A.
  • FIG. 2 is a circuit diagram of an internal resistance measurement circuit of the laminated battery.
  • FIG. 3 is a diagram illustrating a detailed configuration of the positive-side DC blocking unit, the negative-side DC blocking unit, the midpoint DC blocking unit, the positive-side AC potential difference detection unit, and the negative-side AC potential difference detection unit.
  • FIG. 4 is a diagram illustrating a detailed configuration of the positive power supply unit and the negative power supply unit.
  • FIG. 5 is a diagram illustrating a detailed configuration of the AC adjustment unit.
  • FIG. 1A is a perspective view illustrating a fuel cell as an example of a laminated battery to which the internal resistance measurement circuit of the laminated battery in the first embodiment is applied.
  • FIG. 1B is an
  • FIG. 6 is a diagram illustrating a detailed configuration of the resistance calculation unit.
  • FIG. 7A is a perspective view of an internal resistance measurement circuit and a fuel cell stack in the present embodiment.
  • FIG. 7B is a side view of the internal resistance measurement circuit and the fuel cell stack shown in FIG. 7A as viewed from the side.
  • FIG. 8 is a diagram showing a winding method in which the current loop line is an even number winding of two or more turns and the winding direction is reversed at the midpoint of the winding number.
  • FIG. 9 is a diagram for explaining a portion that combines a part of the cell voltage detection line of the voltage detection circuit and a part of the voltage detection line of the positive side AC potential difference detection unit and the negative side AC potential difference detection unit of the sense circuit.
  • FIG. FIG. 10 is a diagram illustrating an example of a method of arranging the source circuit and the sense circuit when the voltage detection tab 60 is provided on the side surface of the fuel cell stack.
  • FIG. 1A and 1B are diagrams illustrating a fuel cell as an example of a laminated battery to which the internal resistance measurement circuit of the laminated battery according to the first embodiment is applied.
  • FIG. 1A is an external perspective view
  • FIG. 1B is a power generation cell.
  • a voltage detection tab 60 for taking out a voltage detection line for detecting the voltage of each power generation cell is provided on the upper surface of the fuel cell stack 1, but is omitted in FIG. 1A.
  • the fuel cell stack 1 includes a plurality of stacked power generation cells 10, a current collecting plate 20, an insulating plate 30, an end plate 40, and four tension rods 50.
  • the power generation cell 10 is a unit cell of a fuel cell. Each power generation cell 10 generates an electromotive voltage of about 1 volt (V). Details of the configuration of each power generation cell 10 will be described later.
  • the current collecting plate 20 is disposed outside each of the stacked power generation cells 10.
  • the current collecting plate 20 is formed of a gas impermeable conductive member, for example, dense carbon.
  • the current collecting plate 20 includes a positive electrode terminal 211 and a negative electrode terminal 212.
  • An intermediate terminal 213 is provided between the positive terminal 211 and the negative terminal 212.
  • the fuel cell stack 1 extracts and outputs the electrons e ⁇ generated in each power generation cell 10 by the positive electrode terminal 211 and the negative electrode terminal 212.
  • the insulating plates 30 are respectively arranged outside the current collecting plate 20.
  • the insulating plate 30 is formed of an insulating member such as rubber.
  • the end plate 40 is disposed outside the insulating plate 30.
  • the end plate 40 is made of a rigid metal material such as steel.
  • One end plate 40 (the left front end plate 40 in FIG. 1A) has an anode supply port 41a, an anode discharge port 41b, a cathode supply port 42a, a cathode discharge port 42b, and a cooling water supply port 43a.
  • a cooling water discharge port 43b is provided.
  • the anode discharge port 41b, the cooling water discharge port 43b, and the cathode supply port 42a are provided on the right side in the drawing.
  • the cathode discharge port 42b, the cooling water supply port 43a, and the anode supply port 41a are provided on the left side in the drawing.
  • the tension rods 50 are arranged near the four corners of the end plate 40, respectively.
  • the fuel cell stack 1 has a hole (not shown) penetrating therethrough.
  • the tension rod 50 is inserted through the through hole.
  • the tension rod 50 is formed of a rigid metal material such as steel.
  • the tension rod 50 is insulated on the surface in order to prevent an electrical short circuit between the power generation cells 10.
  • a nut (not shown because it is in the back) is screwed into the tension rod 50. The tension rod 50 and the nut tighten the fuel cell stack 1 in the stacking direction.
  • a method of supplying hydrogen as the anode gas to the anode supply port 41a for example, a method of directly supplying hydrogen gas from a hydrogen storage device or a hydrogen-containing gas reformed by reforming a fuel containing hydrogen is supplied.
  • the hydrogen storage device include a high-pressure gas tank, a liquefied hydrogen tank, and a hydrogen storage alloy tank.
  • the fuel containing hydrogen include natural gas, methanol, and gasoline.
  • Air is generally used as the cathode gas supplied to the cathode supply port 42a.
  • an anode separator (anode bipolar plate) 12a and a cathode separator (cathode bipolar plate) 12b are arranged on both surfaces of a membrane electrode assembly (MEA) 11. Is the structure.
  • MEA 11 has electrode catalyst layers 112 formed on both surfaces of an electrolyte membrane 111 made of an ion exchange membrane.
  • a gas diffusion layer (gas diffusion layer: GDL) 113 is formed on the electrode catalyst layer 112.
  • the electrode catalyst layer 112 is formed of carbon black particles carrying platinum, for example.
  • the GDL 113 is formed of a member having sufficient gas diffusibility and conductivity, for example, carbon fiber.
  • the anode gas supplied from the anode supply port 41a flows through this GDL 113a, reacts with the anode electrode catalyst layer 112 (112a), and is discharged from the anode discharge port 41b.
  • the cathode gas supplied from the cathode supply port 42a flows through this GDL 113b, reacts with the cathode electrode catalyst layer 112 (112b), and is discharged from the cathode discharge port 42b.
  • the anode separator 12a is overlaid on one side of the MEA 11 (back side in FIG. 1B) via the GDL 113a and the seal 14a.
  • the cathode separator 12b is overlaid on one side (the surface in FIG. 1B) of the MEA 11 via the GDL 113b and the seal 14b.
  • the seal 14 (14a, 14b) is a rubber-like elastic material such as silicone rubber, ethylene-propylene rubber (EPDM), or fluorine rubber.
  • the anode separator 12a and the cathode separator 12b are formed by press-molding a metal separator base such as stainless steel so that a reaction gas channel is formed on one surface and alternately arranged with the reaction gas channel on the opposite surface. A cooling water flow path is formed. As shown in FIG. 1B, the anode separator 12a and the cathode separator 12b are overlapped to form a cooling water flow path.
  • the MEA 11, the anode separator 12a, and the cathode separator 12b are respectively formed with holes 41a, 41b, 42a, 42b, 43a, 43b, which are stacked to be an anode supply port (anode supply manifold) 41a, an anode discharge port.
  • Anode discharge manifold 41b, cathode supply port (cathode supply manifold) 42a, cathode discharge port (cathode discharge manifold) 42b, cooling water supply port (cooling water supply manifold) 43a and cooling water discharge port (cooling water discharge manifold) 43b Is formed.
  • FIG. 2 is a circuit diagram of the internal resistance measurement circuit of the laminated battery.
  • the internal resistance measuring device 5 includes a positive-side DC blocking unit 511, a negative-side DC blocking unit 512, a midpoint DC blocking unit 513, a positive-side AC potential difference detection unit 521, a negative-side AC potential difference detection unit 522, Side power supply unit 531, negative electrode side power supply unit 532, AC adjustment unit 540, and resistance calculation unit 550.
  • the positive side DC blocking unit 511 is connected to the positive terminal 211 of the fuel cell 1.
  • the negative electrode side direct current blocking unit 512 is connected to the negative electrode terminal 212 of the fuel cell 1.
  • the midpoint DC cutoff unit 513 is connected to the midway terminal 213 of the fuel cell 1. Note that the midpoint DC blocking unit 513 may not be provided as indicated by the broken line in FIG. These DC blockers block DC but flow AC.
  • the DC cut-off unit is, for example, a capacitor or a transformer.
  • the positive side AC potential difference detection unit 521 inputs the AC potential Va of the positive terminal 211 of the fuel cell 1 and the AC potential Vc of the midway terminal 213 and outputs an AC potential difference.
  • the negative electrode side AC potential difference detection unit 522 inputs the AC potential Vb of the negative electrode terminal 212 of the fuel cell 1 and the AC potential Vc of the midway terminal 213 and outputs an AC potential difference.
  • the positive side AC potential difference detection unit 521 and the negative side AC potential difference detection unit 522 are, for example, differential amplifiers (instrumentation amplifiers).
  • OP amplifier operational amplifier
  • the output current Io can be obtained by the input voltage Vi ⁇ proportional constant Rs without actually measuring the output current Io. Further, since the output is a current, the alternating current flowing through the stacked cell group and the output of the current source have the same phase even if an element having a phase angle such as a capacitor is interposed in the current path. Further, it has the same phase as the input voltage Vi. Therefore, it is not necessary to consider the phase difference in calculating the resistance at the next stage, and the circuit is simple. Furthermore, even if the impedance of the capacitor in the current path varies, it is not affected by the phase change. For this reason, it is preferable to use a circuit as shown in FIG. The same applies to the negative power supply unit 532.
  • the AC adjustment unit 540 can be realized by, for example, a PI control circuit as shown in FIG.
  • the AC adjustment unit 540 includes a positive detection circuit 5411, a positive subtractor 5421, a positive integration circuit 5431, a positive multiplier 5451, a negative detection circuit 5412, a negative subtractor 5422, and a negative side. Integrating circuit 5432, negative multiplier 5542, reference voltage 544, and AC signal source 546 are included.
  • the positive electrode side detection circuit 5411 removes an unnecessary signal from the AC potential Va on the wiring of the positive electrode side power supply unit 531 connected to the positive electrode terminal 211 of the laminated battery 1 and converts it into a DC signal.
  • the positive side subtractor 5421 detects the difference between the DC signal and the reference voltage 544.
  • the positive integration circuit 5431 averages or adjusts the sensitivity of the signal output from the positive subtractor 5421.
  • the positive multiplier 5451 modulates the amplitude of the AC signal source 546 with the output of the positive integration circuit 5431.
  • the AC adjustment unit 540 generates a command signal to the positive power supply unit 531 in this way. Similarly, AC adjustment unit 540 generates a command signal to negative power supply unit 532.
  • the AC potentials Va and Vb are both controlled to a predetermined level by increasing / decreasing the outputs of the positive power supply unit 531 and the negative power supply unit 532 according to the command signal generated in this way. As a result, the alternating potentials Va and Vb are equipotential.
  • an analog arithmetic IC is taken as an example in the circuit configuration.
  • the AC potential Va (Vb) may be digitally converted by an AD converter and then configured by a digital control circuit.
  • the resistance calculation unit 550 includes an AD converter (ADC) 551 and a microcomputer chip (CPU) 552.
  • the AD converter 551 converts the alternating current (I1, I2) and the alternating voltage (V1, V2), which are analog signals, into digital numerical signals and transfers them to the microcomputer chip 552.
  • the microcomputer chip 552 stores in advance a program for calculating the internal resistance Rn of each power generation cell 10 and the internal resistance R of the entire laminated battery.
  • the microcomputer chip 552 sequentially calculates at predetermined minute time intervals, or outputs a calculation result in response to a request from the controller 6.
  • the internal resistance Rn and the internal resistance R of the entire laminated battery are calculated by the following formula.
  • the resistance calculation unit 550 may be realized by an analog calculation circuit using an analog calculation IC. According to the analog arithmetic circuit, it is possible to output a resistance value change which is continuous in time.
  • the above-described internal resistance measurement circuit for a stacked battery includes a source circuit for supplying an alternating current to the fuel cell stack 1 and an alternating current for the fuel cell stack 1 in order to measure the internal resistance R of the fuel cell stack 1 that is a stacked battery.
  • the source circuit includes at least a positive power supply unit 531 and a negative power supply unit 532.
  • the sense circuit includes at least a positive-side AC potential difference detection unit 521, a negative-side AC potential difference detection unit 522, an AC adjustment unit 540, and a resistance calculation unit 550.
  • the mounting positions of the source circuit and the sense circuit are determined so that the magnetic field generated by the current flowing in the source circuit does not affect the detection voltage of the sense circuit.
  • FIG. 7A is a perspective view of the internal resistance measurement circuit and the fuel cell stack 1 in the present embodiment.
  • each of the source circuit and the sense circuit is connected to the voltage detection tab 60 of the power generation cell connected to each terminal in order to connect to the positive terminal 211, the negative terminal 212, and the midway terminal 213 described above. An example is shown.
  • FIG. 7A shows the fuel cell stack 1, internal resistances R1 and R2, a substrate 51, a positive power supply unit 531 and a negative power supply unit 532, a substrate 52, a positive AC potential difference detection unit 521 and a negative AC.
  • a potential difference detection unit 522 is shown.
  • FIG. 7B is a side view of the internal resistance circuit and the fuel cell stack 1 shown in FIG. 7A as viewed from the side.
  • pillars are provided at both ends in the direction in which the voltage detection tabs 60 of the fuel cell stack 1 are arranged, and the substrate 51 and the substrate 52 are placed on the upper surface of the fuel cell stack 1 by the pillars. Are provided at predetermined intervals.
  • the substrate 51 and the substrate 52 may be provided directly on the upper surface of the fuel cell stack 1.
  • a voltage detection tab 60 for taking out a voltage detection line for detecting the voltage of each power generation cell is provided in the middle of the fuel cell stack 1 on the upper surface of the surface of the fuel cell stack 1. It is provided in a row.
  • FIG. 7A only three voltage detection tabs 60 necessary for the description of the present embodiment are shown for easy understanding, and the voltage detection tabs of other power generation cells are omitted.
  • the substrate 51 on which the source circuit is mounted and the substrate 52 on which the sense circuit is mounted are arranged at predetermined intervals on both sides of the voltage detection tab 60.
  • FIG. 7A shows current loops 61 and 62 of current flowing in the source circuit, and current loops 63 and 64 of current flowing in the sense circuit.
  • the current loop 61 is based on the current output from the positive power supply unit 531, and the current loop 62 is based on the current output from the negative power supply unit 532.
  • the current loop 63 is a loop of current flowing through the positive electrode terminal 211, the midway terminal 213, and the positive side AC potential difference detection unit 521 of the fuel cell 1, and the current loop 64 is midway through the negative electrode terminal 212 of the fuel cell 1. This is a loop of current flowing through the terminal 213 and the negative-side AC potential difference detection unit 522.
  • the current loops 61 and 62 on the source circuit do not intersect with the current loops 63 and 64 on the sense circuit.
  • the amount of the magnetic field generated by the current loops 61 and 62 on the source circuit penetrates the current loops 63 and 64 on the sense circuit as compared with the circuit configuration in which the current loop on the source circuit intersects the current loop on the sense circuit. Therefore, the detection accuracy of the AC potential difference detected by the positive-side AC potential difference detection unit 521 and the negative-side AC potential difference detection unit 522 is improved.
  • each circuit element of the source circuit is arranged so that the current loops 61 and 62 on the source circuit can be positioned close to the voltage detection tab 60.
  • the circuit elements of the sense circuit are arranged so that the current loops 63 and 64 on the sense circuit can be positioned close to the voltage detection tab 60. Thereby, the source circuit and the sense circuit can be reduced in size.
  • the arrangement of the current loop lines so that the magnetic fields (lines of magnetic force) generated by the two current loops 61 and 62 on the source circuit are offset on the sense circuit side with respect to the source circuit.
  • the substrate 51 is formed so as to extend laterally to a portion where the magnetic field generated by the current loops 61 and 62 is the strongest (for example, the center of the current loops 61 and 62). For this reason, the magnetic field generated on the fuel cell stack 1 side by the current loops 61 and 62 is blocked by the substrate 51. That is, the substrate 51 serves as a shielding member that shields the magnetic flux to the sense circuit.
  • the substrate 52 is formed so as to reduce the amount of the magnetic field generated by the current loops 61 and 62 on the source circuit passing through the current loops 63 and 64 on the sense circuit. Therefore, the substrate 52 serves as a shielding member that shields the magnetic flux acting on the sense circuit. Thus, the substrate 51 and the substrate 52 can suppress the strength of the magnetic field acting on the sense circuit.
  • the current loop line As a wiring in which the magnetic field (line of magnetic force) generated by each of the two current loops 61 and 62 of the source circuit is canceled on the sense circuit side, the current loop line has two or more even turns and the winding direction at the midpoint of the number of turns There is also a way to reverse.
  • FIG. 8 is a diagram showing an example of a winding method in which the current loop line is an even number winding of two or more times and the winding direction is reversed at the midpoint of the number of windings.
  • FIG. 8 shows a part of the two current loops 61 and 62 of the source circuit, and the voltage detection tab 60 is omitted.
  • a voltage detection circuit for detecting the voltage of each power generation cell is also mounted on the substrate 52 on which the sense circuit is mounted.
  • a part of the cell voltage detection line of the voltage detection circuit is also used as a part of the voltage detection line of the positive side AC potential difference detection unit 521 and the negative side AC potential difference detection unit 522 of the sense circuit.
  • FIG. 9 illustrates a portion that serves as both a part of the cell voltage detection line of the voltage detection circuit and a part of the voltage detection line of the positive side AC potential difference detection unit 521 and the negative side AC potential difference detection unit 522 of the sense circuit.
  • cell voltage detection lines L0 to Ln for detecting a cell voltage are connected to each power generation cell.
  • voltage detection lines L11, L12, and L13 for detecting an AC potential difference by the positive side AC potential difference detection unit 521 and the negative side AC potential difference detection unit 522 of the sense circuit are connected in the middle of the cell voltage detection line.
  • the voltage detection line L13 is connected in the middle of the cell voltage detection line Ln
  • the voltage detection line L11 is connected in the middle of the cell voltage detection line L0.
  • the voltage detection line L12 is connected in the middle of the cell voltage detection line having the same potential as the midway terminal 213.
  • the portion surrounded by the alternate long and short dash line is a portion that also serves as a voltage detection line. By sharing part of the voltage detection line, the number of wirings can be reduced.
  • the cell voltage detection lines L0 to Ln are on the same substrate 52 as the sense circuit, but are connected to the surface opposite to the surface on which the sense circuit is mounted. That is, the cell voltage detection circuit is provided on the back side of the substrate on which the sense circuit is mounted.
  • FIG. 9 shows that the cell voltage detection lines L0 to Ln taken out from the voltage detection tab 60 are connected to the back side of the substrate 52 on which the sense circuit is mounted. As a result, it is possible to prevent damage to the cell voltage detection lines L0 to Ln due to contact between the circuit elements constituting the sense circuit and the plurality of cell voltage detection lines L0 to Ln.
  • the microcomputer chip (CPU) 552 of the resistance calculation unit 550 is disposed outside the current loops 61 and 62 on the source circuit and the current loops 63 and 64 on the sense circuit. Thereby, it is possible to prevent the electromagnetic current generated by the microcomputer chip 552 from affecting the current of the source circuit and the current of the sense circuit.
  • the internal resistance measurement circuit of the multilayer battery applies a current to the multilayer battery configured by laminating a plurality of single cells, and applies the potential and application of a predetermined portion of the multilayer battery to which the current is applied.
  • An internal resistance measurement circuit for a laminated battery that measures the internal resistance of the laminated battery based on the measured current, a source circuit that applies current to the laminated battery, and a potential of a predetermined portion of the laminated battery to which the current is applied.
  • the source circuit and the sense circuit are respectively arranged on the opposite sides of the state detection line (cell voltage detection line) for detecting the state of the single cell.
  • the source circuit and the sense circuit can be separated from each other, and the amount of magnetic flux generated by the current on the source circuit penetrating the sense circuit can be reduced, so that the measurement accuracy of the potential detected by the sense circuit can be reduced. Can be improved. Therefore, the internal resistance of the laminated battery can be measured with high accuracy.
  • a shielding part for shielding the magnetic flux acting on the sense circuit from the source circuit for example, a substrate on which the source circuit is mounted and a substrate on which the sense circuit is mounted are formed to be widened. The For this reason, a part of the magnetic flux acting on the sense circuit from the source circuit is blocked by these substrates. Thereby, since the measurement accuracy of the potential detected by the sense circuit can be improved, the internal resistance of the laminated battery can be measured with high accuracy.
  • the source circuit and the sense circuit are arranged in the same plane.
  • one of the source circuit and the sense circuit is arranged on the front surface, and the other is arranged on the back surface.
  • the positive electrode side power supply unit 531 and the negative electrode side power supply unit 532 are provided on the surface of the substrate 51, and the positive electrode side AC potential difference detection unit 521 and the negative electrode side are provided on the back surface of the substrate 52, that is, the surface on the fuel cell stack 1 side.
  • An AC potential difference detection unit 522 is provided. That is, the sense circuit is disposed on the surface opposite to the surface on which the source circuit is disposed, of the front surface and the back surface of the substrate 52 on which the sense circuit is mounted.
  • the magnetic field (lines of magnetic force) generated by the source circuit on the substrate 51 is blocked by the substrate 52. That is, the substrate 52 functions as a shielding member that shields the magnetic flux from the source circuit to the sense circuit. Furthermore, when the housing of the fuel cell stack 1 is formed of a magnetic material, the magnetic flux generated on the fuel cell stack 1 side can be reduced.
  • the positive electrode side power supply unit 531 and the negative electrode side power supply unit 532 may be provided on the back surface of the substrate 51, and the positive electrode side AC potential difference detection unit 521 and the negative electrode side AC potential difference detection unit 522 may be provided on the surface of the substrate 52.
  • the fuel cell stack 1 in addition to the substrate 51 and the substrate 52, the fuel cell stack 1 also functions as a blocking member.
  • a magnetic shield layer is provided between the front surface and the back surface in order to prevent the magnetic field generated by the current flowing through the source circuit from affecting the sense circuit.
  • the magnetic shield layer is, for example, a copper foil and a magnetic body such as a steel material.
  • one of the source circuit and the sense circuit is arranged on the surface of the substrate, and the other circuit is arranged on the back surface of the substrate.
  • a magnetic shield layer was provided between the front surface and the back surface. This prevents the magnetic flux generated by the current on the source circuit from penetrating the sense circuit, improving the measurement accuracy of the potential detected by the sense circuit, and as a result, measuring the internal resistance of the stacked battery with high accuracy. can do.
  • the present invention is not limited to the embodiment described above.
  • a fuel cell stack has been described as an example of a stacked battery, other types of batteries such as a primary battery and a secondary battery may be used.
  • the present invention is not limited by a specific circuit configuration for measuring the internal resistance.
  • voltage detection tab 60 has been described as being provided on the upper surface of the fuel cell stack 1, it may be provided on the side surface.
  • FIG. 10 is a diagram showing an example of a method of arranging the source circuit and the sense circuit when the voltage detection tab 60 is provided on the side surface of the fuel cell stack 1.
  • the substrate 51 on which the source circuit is mounted is disposed on the upper surface of the fuel cell stack 1, and the substrate 52 on which the sense circuit is mounted is disposed on the lower surface of the fuel cell stack 1. Also in this case, the source circuit and the sense circuit are arranged on opposite sides of the cell voltage detection lines L0 to Ln.
  • the sense circuit since the sense circuit is provided on the opposite side of the source circuit across the fuel cell stack 1, the magnetic flux generated by the current loop on the source circuit does not affect the sense circuit. That is, the fuel cell stack 1 that is the base of the source circuit and the sense circuit functions as a shielding unit for shielding the magnetic flux from the source circuit to the sense circuit. Thereby, the measurement accuracy of the potential detected by the sense circuit can be improved, and the internal resistance of the laminated battery can be measured with high accuracy.
  • the source circuit and the sense circuit may be arranged on a single substrate at a predetermined interval. . Thereby, a part of magnetic flux from the sense circuit to the source circuit can be blocked.
  • a blocking member may be provided between the source circuit and the sense circuit.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fuel Cell (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un circuit de mesure de résistance interne de batterie empilée qui applique un courant à une batterie empilée constituée par une pluralité de cellules uniques empilées, et qui, sur la base du courant appliqué de même que du potentiel à une partie spécifique de la batterie empilée sur laquelle le courant a été appliqué, mesure la résistance interne de la batterie empilée. Le circuit de mesure de résistance interne de batterie empilée comprend un circuit de source qui applique un courant à la batterie empilée, et un circuit de détection qui mesure le potentiel à une partie spécifique de la batterie empilée à laquelle le courant a été appliqué. Une section de blindage est disposée entre le circuit de source et le circuit de détection afin de blinder le circuit de détection contre un flux magnétique provenant du circuit de source.
PCT/JP2013/074811 2012-09-18 2013-09-13 Circuit de mesure de résistance interne de batterie empilée WO2014046028A1 (fr)

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JP2014536825A JP6036836B2 (ja) 2012-09-18 2013-09-13 積層電池の内部抵抗測定回路

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JP2012204626 2012-09-18
JP2012-204626 2012-09-18

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016097114A1 (fr) * 2014-12-19 2016-06-23 Compagnie Generale Des Etablissements Michelin Système de mesure de l'hygrométrie d'une membrane échangeuse d'ions dans une pile à combustible
CN112305436A (zh) * 2019-07-26 2021-02-02 株式会社电装 电池监视装置
EP3916409A4 (fr) * 2019-10-14 2022-05-11 Mintech Co., Ltd. Dispositif de mesure d'impédance à haute précision
JP7483567B2 (ja) 2020-09-09 2024-05-15 本田技研工業株式会社 蓄電システム

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CN107210465B (zh) * 2014-12-19 2021-01-15 米其林集团总公司 用于测量燃料电池中的离子交换膜的湿度的系统
CN112305436A (zh) * 2019-07-26 2021-02-02 株式会社电装 电池监视装置
JP2021022473A (ja) * 2019-07-26 2021-02-18 株式会社デンソー 電池監視装置
JP7205410B2 (ja) 2019-07-26 2023-01-17 株式会社デンソー 電池監視装置
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EP3916409A4 (fr) * 2019-10-14 2022-05-11 Mintech Co., Ltd. Dispositif de mesure d'impédance à haute précision
JP7483567B2 (ja) 2020-09-09 2024-05-15 本田技研工業株式会社 蓄電システム

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