WO2021145203A1 - Transformateur d'isolation et procédé de fabrication de transformateur d'isolation - Google Patents

Transformateur d'isolation et procédé de fabrication de transformateur d'isolation Download PDF

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Publication number
WO2021145203A1
WO2021145203A1 PCT/JP2020/048883 JP2020048883W WO2021145203A1 WO 2021145203 A1 WO2021145203 A1 WO 2021145203A1 JP 2020048883 W JP2020048883 W JP 2020048883W WO 2021145203 A1 WO2021145203 A1 WO 2021145203A1
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WIPO (PCT)
Prior art keywords
magnetic material
insertion portion
isolation transformer
pattern
substrate
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PCT/JP2020/048883
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English (en)
Japanese (ja)
Inventor
幸貴 内田
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Publication of WO2021145203A1 publication Critical patent/WO2021145203A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/10—Single-phase transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils

Definitions

  • This disclosure relates to an isolation transformer and a method for manufacturing an isolation transformer.
  • Patent Document 1 discloses that a transformer structure is formed on a substrate by sandwiching a primary side circuit and a secondary side circuit formed on the substrate by using two ferrite cores.
  • the cross-sectional shape of each of the two ferrite cores is E-shaped and I-shaped.
  • the E-shaped ferrite core in this transformer structure has an insertion portion to be inserted into a through hole formed in the substrate, and the end portion of the insertion portion is in contact with the I-shaped ferrite core.
  • the I-shaped ferrite core tends to have a problem that the position in the direction along the substrate is difficult to determine. Therefore, if the position of the I-shaped ferrite core varies with respect to the substrate, the area where the end of the insertion portion of the E-shaped ferrite core and the I-shaped ferrite core face each other and come into contact with each other varies, resulting in variation. , The electrical characteristics of the transformer structure may vary.
  • an object of the present disclosure is to provide an isolation transformer having stable electrical characteristics and a method for manufacturing an isolation transformer.
  • the isolation transformer according to the first aspect of the present disclosure is A substrate with through holes and A first pattern arranged around the through hole in the substrate and A second pattern arranged around the through hole in the substrate and insulated from the first pattern, A magnetic material portion having a first magnetic material and a second magnetic material, With The second magnetic material is arranged so as to face one surface of the substrate.
  • the first magnetic material has an insertion portion in which at least a part thereof is inserted into the through hole.
  • the one-sided end of the insertion portion is arranged to face the second magnetic material.
  • An isolation transformer whose external dimensions of the second magnetic material in the first direction along one surface are larger than the external dimensions of the end portion in the first direction.
  • the method for manufacturing an isolation transformer according to the second aspect of the present disclosure is as follows. For a substrate on which a first pattern and a second pattern insulated from each other are formed, and a through hole is formed in which the first pattern and the second pattern are arranged around the substrate. A first magnetic material arranging step of inserting the insertion portion into the through hole with the first magnetic material having an insertion portion to be inserted into the through hole. A second magnetic material arranging step of arranging the second magnetic material so as to face one surface of the substrate and to face the end portion of the insertion portion. With The external dimension of the second magnetic material in the first direction along the one surface is larger than the external dimension of the end portion in the first direction.
  • the technology according to the present disclosure can stabilize the electrical characteristics of the isolation transformer.
  • FIG. 1 is a perspective view schematically illustrating a power storage module according to the first embodiment.
  • FIG. 2 is a plan view schematically illustrating the power storage module according to the first embodiment.
  • FIG. 3 is an enlarged plan view illustrating the circuit board and its periphery in the power storage module according to the first embodiment.
  • FIG. 4 is an enlarged plan view illustrating an isolation transformer according to the first embodiment.
  • FIG. 5 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 6 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 7 is a cross-sectional view taken along the line CC in FIG.
  • FIG. 8 is a cross-sectional view taken along the line DD in FIG.
  • FIG. 9 is a cross-sectional view taken along the line EE in FIG.
  • FIG. 10 is a circuit diagram conceptually exemplifying the configurations of the power storage module and the battery monitoring unit according to the first embodiment.
  • the second pattern is provided with a magnetic body portion having a first magnetic body and a second magnetic body, and the second magnetic body is arranged so as to face one surface of the substrate, and the first magnetic body is provided.
  • the outer dimension of the second magnetic material in the first direction is larger than the outer dimension of the end portion in the first direction.
  • the end of the insertion portion is unlikely to be displaced from the facing surface of the second magnetic material (the surface facing one surface of the substrate) at the manufacturing stage, so that the electrical characteristics are easily stabilized. .. Further, since a part of the second magnetic material can be arranged so as to project from the end portion of the insertion portion in the first direction, a magnetic effect due to the magnetic material can be generated even in the overhanging portion.
  • One surface is a plate surface on one side in the thickness direction (plate thickness direction) of the substrate.
  • the substrate has one or more second through holes formed on at least one side of the through holes in the first direction, and the insertion portions include a first insertion portion to be inserted into the through holes and the insertion portion. It has one or more second insertion portions to be inserted into the second through hole, the first end portion on the one side of the first insertion portion and the second insertion portion on the one side of the second insertion portion.
  • the ends are aligned in the first direction, and the external dimensions of the second magnetic material in the first direction are the first direction of the entire end including the first end and the second end.
  • the insulated transformer according to [1] which is larger than the external dimensions.
  • the configuration in which the end on one side of the insertion portion is arranged so as to face the second magnetic material includes a configuration in which the end is bonded to the second magnetic material and an end portion is bonded to the second magnetic material. Includes configurations that come into contact without.
  • the isolation transformer described in the above [3] can easily maintain a state in which the end portion of the insertion portion faces the second magnetic material even if the position of the second magnetic material shifts in any direction along the substrate. Become.
  • a temperature detecting unit for detecting the temperature of the substrate is provided, and the temperature detecting unit is provided around at least one of the first magnetic material and the second magnetic material on the substrate [1] to [3]. ]
  • the isolation transformer described in [4] above can detect the temperature of the substrate by the temperature detection unit, it is possible to operate based on the temperature of the substrate provided with the first magnetic material and the second magnetic material.
  • the periphery of the first magnetic material is a position on the substrate that is affected by the temperature change of the first magnetic material, and specifically, a position closer to the first magnetic material than the outer edge of the substrate is desirable.
  • the periphery of the second magnetic material is a position on the substrate that is affected by the temperature change of the second magnetic material, and specifically, a position closer to the second magnetic material than the outer edge of the substrate is desirable.
  • a temperature detecting unit that detects the temperature of the substrate and a protective operating unit that performs a protective operation that suppresses a temperature rise of the substrate when the temperature detected by the temperature detecting unit is equal to or higher than a threshold value are provided.
  • the isolation transformer according to any one of [1] to [4].
  • the isolation transformer described in the above [5] can suppress an increase in the temperature of the substrate provided with the first magnetic material and the second magnetic material by the temperature detecting unit and the protective operation unit. Thereby, the temperature rise of the substrate caused by the first magnetic material and the second magnetic material can be suppressed.
  • the temperature rise of the substrate provided with the first magnetic material and the second magnetic material can be suppressed by the temperature detection unit and the protective operation unit, so that the temperature rise of the first magnetic material and the second magnetic material causes the temperature rise. Even if a ferrite-based material that is easily magnetically saturated can be used, magnetic saturation in the first magnetic material and the second magnetic material can be suppressed, and thereby the cost related to the first magnetic material and the second magnetic material can be suppressed. ..
  • the isolation transformer described in [6] above may be assembled in a power storage module in which a plurality of power storage elements are integrally provided.
  • the power storage module detects the temperature of the power storage element by the temperature detection unit, and the protection operation unit suppresses the temperature rise of the power storage element. If an isolation transformer is provided in the power storage module having such a configuration, it is possible to suppress the temperature rise of the substrate caused by the first magnetic material and the second magnetic material.
  • a first pattern and a second pattern that are insulated from each other are formed, and the first pattern and the second pattern are inserted into the through hole with respect to a substrate on which a through hole is formed around the first pattern and the second pattern.
  • a second magnetic material arranging step of arranging the second magnetic material so as to face the end portion is provided, and the external dimensions of the second magnetic material in the first direction along the one surface are the external dimensions of the end portion in the first direction. How to make a larger insulated transformer.
  • an isolation transformer structure can be formed on a substrate by executing a first magnetic material placement step and a second magnetic material placement step.
  • the external dimension of the second magnetic material in the first direction along one surface is larger than the external dimension of the end portion in the first direction. Therefore, since a part of the second magnetic material can be arranged so as to project from the end of the insertion portion in the first direction, a magnetic effect due to the magnetic material can be generated even in the overhanging portion. ..
  • the method for manufacturing an isolation transformer described in [8] above is when the second magnetic material is first arranged on one surface of the substrate so that the end of the insertion portion is in contact with the second magnetic material. In addition, it is easy to align the position of the end of the insertion portion with one surface of the substrate.
  • FIG. 1 illustrates the power storage module 1 to which the circuit board 40 provided with the isolation transformer 50 according to the first embodiment is attached.
  • the power storage module 1 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is used as a power source for driving the mounted vehicle.
  • the power storage module 1 has a plurality of power storage elements 1A and a battery wiring module 10A.
  • the power storage module 1 is composed of a plurality of power storage elements 1A, which are unit batteries.
  • a plurality of power storage elements 1A having a positive electrode P and a negative electrode N are arranged in a predetermined direction.
  • the plurality of power storage elements 1A are arranged in one direction so that the directions in which the positive electrode P and the negative electrode N are arranged are alternately alternated.
  • the power storage module 1 has two terminal rows R formed by alternately forming a row of positive electrodes P and negative electrodes N.
  • the power storage module 1 has a rectangular parallelepiped structure (see FIG. 1).
  • the structure of the holding portion for integrally holding the plurality of power storage elements 1A is not particularly limited.
  • Each power storage element 1A functions as one unit battery having a positive electrode P and a negative electrode N.
  • Each power storage element 1A has, for example, a rectangular parallelepiped shape of a predetermined size.
  • a power storage module 1 in which the power storage elements 1A are arranged in a line in a predetermined direction is illustrated, but the layout for integrally arranging a plurality of power storage elements 1A is limited to this example. Not done.
  • the battery wiring module 10A has a case main body 11, a plurality of bus bars 12, and a lid 13.
  • the case body 11 is made of synthetic resin and has a quadrangular flat plate shape.
  • the bus bar 12 is formed of a square-shaped sheet metal.
  • a plurality of bus bars 12 are attached to the case body 11.
  • the plurality of bus bars 12 are arranged along each of a pair of sides parallel to each other in the case body 11, and are attached to the case body 11. That is, the plurality of bus bars 12 are attached to the case body 11 in two rows.
  • the battery wiring module 10A is attached to the power storage module 1 so as to cover the terminal row R of the power storage module 1 (see FIG. 2).
  • Each bus bar 12 electrically connects the electrodes of the adjacent power storage elements 1A in the power storage module 1. Specifically, as shown in FIG. 2, the bus bars 12 forming one row are arranged so as to cover one terminal row R of the power storage module 1, and the bus bars 12 forming the other row are the other terminal row. It is arranged so as to cover R. Each bus bar 12 is arranged so as to straddle the adjacent positive electrode P and the negative electrode N. Focusing on one of the power storage elements 1A in which the power storage elements 1A are arranged on both sides, the bus bar 12 covering the positive electrode P covers the negative electrode N of the power storage elements 1A adjacent to one side, and the bus bar 12 covering the negative electrode N is the other.
  • Each bus bar 12 electrically connects a plurality of power storage elements 1A in series by electrically connecting the positive electrode P and the negative electrode N that it covers.
  • a high potential side electrode BH formed of sheet metal is electrically connected to the highest potential positive electrode P of the plurality of power storage elements 1A connected in series.
  • a low-potential side electrode BL formed of sheet metal is electrically connected to the lowest-potential negative electrode N of a plurality of power storage elements 1A connected in series. That is, the plurality of power storage elements 1A are electrically connected by the plurality of bus bars 12 arranged in two rows.
  • electrically connected is preferably configured to be connected in a state of being electrically connected to each other (a state in which a current can flow) so that both potentials of the connection target are equal.
  • the configuration is not limited to this.
  • electrically connected may be a configuration in which both connection targets are connected in a state in which both connection targets can be electrically connected while an electric component is interposed between the two connection targets.
  • the lid 13 is made of synthetic resin and has a quadrangular flat plate shape.
  • the lid 13 sandwiches the bus bar 12 and the circuit board 40 between the case body 11 and covers the bus bar 12 and the circuit board 40.
  • a circuit board 40 is attached to the battery wiring module 10A.
  • the circuit board 40 is configured as a printed circuit board, is formed in a flat plate shape, and has a quadrangular outer shape in a plan view when viewed from the plate thickness direction.
  • the circuit board 40 is a so-called multilayer board in which a plurality of conductive layers and insulating layers are alternately laminated.
  • the circuit board 40 is provided with patterns formed on the surface or inside of the circuit board 40, through holes and vias for electrically connecting the conductive layers, and the like (not shown).
  • the circuit board 40 is arranged in the battery wiring module 10A that electrically connects each storage element 1A in the power storage module 1.
  • a battery monitoring unit 10B is formed on the circuit board 40. As shown in FIG. 3, the battery monitoring unit 10B is formed on a circuit board 40 provided at an end edge of a power storage module 1 composed of a plurality of power storage elements 1A between rows of adjacent bus bars 12. Will be done.
  • the battery monitoring unit 10B includes a thermistor 42 mounted on a circuit board 40, a cell balance circuit 43, a connector 44, a discharge control unit 45, an isolation transformer 50, and the like.
  • the thermistor 42 is an element that outputs a temperature signal indicating the temperature of the position where the thermistor 42 is provided.
  • the thermistor 42 is mounted on the circuit board 40 in the vicinity of the cell balance circuit 43 and the isolation transformer 50.
  • the thermistor 42 functions to detect the temperature at a predetermined position on the circuit board 40. For example, the thermistor 42 determines the temperature of the resistor 43A of the cell balance circuit 43, the temperature of the power storage element 1A, the temperature around at least one of the first magnetic body 50D and the second magnetic body 50E described later of the isolation transformer 50, and the like. It functions as a temperature detector to detect.
  • the thermistor 42 emphasizes the detection of the temperature of the power storage element 1A
  • the cell balance circuit 43 is a circuit that performs a cell balance operation that corrects a bias in the amount of electricity stored in the electricity storage module 1, and specifically, functions as a cell balance circuit that equalizes the voltage or capacity of each of the electricity storage elements 1A. do.
  • the cell balance circuit 43 is provided with a plurality of resistors 43A. These resistors 43A have a function of converting the electric energy stored in each power storage element 1A into heat energy when the cell balance circuit 43 performs the balance operation.
  • a cable 73 for exchanging signals with other devices (for example, an external ECU or the like) is electrically connected to the connector 44.
  • the discharge control unit 45 is composed of an information processing device such as a microcomputer, and is capable of communicating with other devices via a cable 73.
  • the discharge control unit 45 has a function of controlling the cell balance operation of the cell balance circuit 43.
  • the isolation transformer 50 includes a circuit board 40, a magnetic body portion 50A, a first pattern 50B, and a second pattern 50C.
  • a first through hole 50F which is a through hole, and a pair of second through holes 50K are formed through the circuit board 40.
  • the first through hole 50F has a circular shape.
  • the pair of second through holes 50K are formed long in one direction.
  • the pair of second through holes 50K extend in one direction in parallel with each other.
  • the pair of second through holes 50K are formed on the circuit board 40 with the first through holes 50F interposed therebetween (see FIG. 5).
  • the magnetic body portion 50A has a first magnetic body 50D and a second magnetic body 50E.
  • the first magnetic body 50D is formed of a ferrite-based material. Ferritic materials are more likely to be magnetically saturated due to an increase in temperature than amorphous or powdered materials.
  • the first magnetic body 50D has a first magnetic body main body 50H and an insertion portion 50Q.
  • the first magnetic body body 50H has a quadrangular shape and is formed in a flat plate shape.
  • the insertion portion 50Q has a first insertion portion 50G and a pair of second insertion portions 50J.
  • the first insertion portion 50G has a columnar shape and protrudes from the central portion of one surface of the first magnetic body main body 50H.
  • the second insertion portion 50J projects in the same direction as the first insertion portion 50G along a pair of sides located opposite to the first magnetic body main body 50H.
  • the dimensions of the first insertion portion 50G and the pair of second insertion portions 50J protruding from the first magnetic body body 50H are the same as each other, and are slightly larger than the plate thickness of the circuit board 40 (see FIG. 5).
  • the first insertion portion 50G is inserted into the first through hole 50F of the circuit board 40, and each of the pair of second insertion portions 50J is the second penetration of the circuit board 40. It is inserted into the hole 50K.
  • the first magnetic body body 50H is attached to the other surface of the circuit board 40 by using an adhesive.
  • the first magnetic body 50D has a first insertion portion 50G to be inserted into the first through hole 50F, and is arranged on the other surface of the circuit board 40.
  • the second magnetic material 50E is formed of a ferrite-based material.
  • the second magnetic material 50E is formed in a quadrangular flat plate shape.
  • the second magnetic body 50E is a position facing the first magnetic body main body 50H using an adhesive, and is attached to one surface of the circuit board 40.
  • the entire tip surface of the first end 50N of the first insertion portion 50G of the first magnetic body 50D and the tip surface of the second end 50P of the second insertion portion 50J are in a state of facing the second magnetic body 50E. (See FIGS. 4 and 5).
  • the first end portion 50N and the second end portion 50P are included in the end portion 50R of the first magnetic body 50D (see FIG. 5).
  • the entire tip surface of the first end portion 50N of the first insertion portion 50G of the first magnetic body 50D and the second end portion 50P of the second insertion portion 50J is in close contact with the second magnetic body 50E. (See FIG. 5).
  • the second magnetic body 50E is located at a position facing the first magnetic body 50D and is arranged on one surface of the circuit board 40.
  • the first magnetic body 50D includes a first magnetic body main body 50H (opposing portion) facing the other surface of the circuit board 40 (the surface opposite to the one surface in the thickness direction of the circuit board 40) and a first insertion portion. It has 50G and a second insertion portion 50J.
  • the first insertion portion 50G and the second insertion portion 50J are portions protruding from the first magnetic body main body 50H (opposing portion) in the thickness direction of the circuit board 40.
  • the first insertion portion 50G and the second insertion portion 50J are portions where the first end portion 50N and the second end portion 50P on one surface side of its own circuit board 40 face the second magnetic body 50E. At least a part of the portion is inserted into the first through hole 50F and the second through hole 50K.
  • FIG. 4 shows a state in which the first magnetic body 50D and the second magnetic body 50E are attached to the circuit board 40.
  • the external dimensions of the second magnetic body 50E are the first end portion 50N of the first insertion portion 50G of the first magnetic body 50D and the second end portion of the second insertion portion 50J. It is larger than the external dimensions of 50P (see FIGS. 4 and 5).
  • the external dimension of the second magnetic body 50E in the first direction Di is larger than the external dimension of the first direction Di of the entire end portion 50R including the first end portion 50N and the second end portion 50P (see FIG. 5). .).
  • the external dimensions of the second magnetic body 50E are the first end portion 50N of the first insertion portion 50G and the first end portion 50N. It is larger than the external dimensions of the second end portion 50P of the second insertion portion 50J (see FIG. 4).
  • the peripheral edge portion of the second magnetic body 50E is the first end portion 50N of the first insertion portion 50G of the first magnetic body 50D and the second end portion of the second insertion portion 50J. It protrudes from the peripheral edge at 50P (see FIGS. 4 and 5).
  • the external dimensions of the second magnetic body 50E are larger than the external dimensions of the first magnetic body 50D in any direction along the circuit board 40 (see FIG. 4).
  • the second magnetic body 50E is provided in a flange shape so as to project outside the first end portion 50N of the first insertion portion 50G and the second end portion 50P of the second insertion portion 50J. Specifically, the entire first end portion 50N of the first insertion portion 50G and the second end portion 50P of the second insertion portion 50J face the facing surface of the second magnetic body 50E (opposing one surface of the circuit board 40). It is arranged so as to fit inside the outer edge on the surface).
  • the first pattern 50B and the second pattern 50C are provided on the circuit board 40 and are arranged around the first through hole 50F.
  • the second pattern 50C is insulated from the first pattern 50B.
  • the first pattern 50B and the second pattern 50C are formed inside the circuit board 40 (see FIG. 5).
  • the first pattern 50B and the second pattern 50C are formed on four conductive layers laminated inside the circuit board 40 (see FIG. 5). Specifically, as shown in FIGS. 6 to 9, the first pattern 50B and the second pattern 50C make the same number of orbits around the first through hole 50F in each conductive layer in the same direction. ing. In each conductive layer, the first pattern 50B and the second pattern 50C are alternately arranged in the radial direction of the first through hole 50F.
  • one end of the first pattern 50B is separated from the other surface of the circuit board 40 by the first conductive layer. It is electrically connected to one end of the first pattern 50B formed on the second conductive layer via the via Sv1.
  • one end of the second pattern 50C is electrically connected to one end of the second pattern 50C formed on the second conductive layer via via Sv2.
  • the other ends of the first pattern 50B and the second pattern 50C extend in opposite directions toward the outside of the isolation transformer 50 (see FIG. 6).
  • the other end of the first pattern 50B is a third conductive layer that is farther from the other surface of the circuit board 40 than the second conductive layer. It is electrically connected to the other end of the formed first pattern 50B via a via Sv3.
  • the other end of the second pattern 50C is electrically connected to the other end of the second pattern 50C formed on the third conductive layer via the via Sv4.
  • one end of the first pattern 50B is one end of the first pattern 50B formed on the fourth conductive layer closest to one surface of the circuit board 40. Is electrically connected to the via Sv5.
  • one end of the second pattern 50C is electrically connected to one end of the second pattern 50C formed on the fourth conductive layer via the via Sv6.
  • the other ends of the first pattern 50B and the second pattern 50C extend in opposite directions toward the outside of the isolation transformer 50.
  • the other end of the first pattern 50B in the fourth conductive layer extends in the same direction as the other end of the first pattern 50B in the first conductive layer to form the first terminal 50L (FIG. 6, FIG. See 9.).
  • the other end of the second pattern 50C in the fourth conductive layer extends in the same direction as the other end of the second pattern 50C in the first conductive layer to form the second terminal 50M (FIGS. 6 and 9). reference.).
  • At least a part of the first pattern 50B and the second pattern 50C are arranged so as to be alternately arranged in the plate thickness direction of the circuit board 40 (see FIG. 5).
  • the isolation transformer 50 thus configured is provided, for example, between the discharge control unit 45 and the cable 73 (see FIG. 10).
  • the first terminal 50L of the isolation transformer 50 is electrically connected to either the cable 73 or the discharge control unit 45
  • the second terminal 50M is electrically connected to either the cable 73 or the discharge control unit 45. Connected to.
  • the isolation transformer 50 insulates the discharge control unit 45 and the cable 73, and can exchange a pulse signal having a pulse-like waveform between the discharge control unit 45 and the cable 73.
  • the circuit board 40 is attached to the case body 11. Specifically, the circuit board 40 is between a bus bar 12 arranged along one side of the case body 11 and a bus bar 12 arranged along the other side of the case body 11, and is one of the case bodies 11. It is located at the edge of the side.
  • the circuit board 40 is electrically connected to a plurality of power storage elements 1A in the power storage module 1 via a flexible board 20 (see FIG. 2).
  • FPCs Flexible printed circuits
  • the flexible substrate 20 has a structure that is flexible and deformable, and has a structure in which electrical characteristics are maintained even when the flexible substrate 20 is deformed.
  • the flexible substrate 20 and the circuit board 40 are electrically connected to each other via a connector 48 (see FIG. 3) provided on the circuit board 40. That is, the isolation transformer 50 is provided in the power storage module 1 composed of a plurality of power storage elements 1A.
  • the battery monitoring unit 10B formed on the circuit board 40 has a function of detecting the state of voltage and current in each power storage element 1A of the power storage module 1 via the flexible board 20.
  • the battery monitoring unit 10B formed on the circuit board 40 has a function of detecting a state such as the temperature of the resistor 43A, the temperature of the power storage element 1A, and the temperature of the isolation transformer 50 by using the thermistor 42.
  • the battery monitoring unit 10B formed on the circuit board 40 has a function of converting the electric energy stored in each power storage element 1A into heat energy by the resistor 43A when the balance control of the plurality of power storage elements 1A is performed.
  • the case body 11 of the battery wiring module 10A assembled to the power storage module 1 is provided with a circuit board 40 on which a battery monitoring unit 10B for detecting states such as voltage, current, and temperature of the power storage element 1A is formed. See FIG. 3).
  • the battery monitoring unit 10B transmits the state of the voltage, current, temperature, etc. of each power storage element 1A detected by the battery monitoring unit 10B to another device via the cable 73.
  • the other device controls charge / discharge such as balance control in each power storage element 1A based on the state of voltage, current, temperature, etc. in each power storage element 1A detected by the plurality of battery monitoring units 10B. That is, the battery monitoring unit 10B functions as a battery management system that controls charging / discharging of a plurality of power storage elements 1A constituting the power storage module 1 that functions as an in-vehicle battery.
  • an adhesive is applied to a region where the second magnetic material 50E is arranged.
  • the adhesive is, for example, an adhesive having a property of being cured by applying heat, an adhesive having a property of being cured by a lapse of a predetermined time without being affected by heat, or the like.
  • the second magnetic material arranging step of arranging the second magnetic material 50E along one surface of the circuit board 40 is executed.
  • the second magnetic material 50E is arranged on one side of the circuit board 40 by using a surface mounter or the like so as to cover the region to which the adhesive is applied. At this time, one side of the circuit board 40 is turned upward.
  • the second magnetic material 50E is arranged so as to cover the portion orbiting the first through hole 50F in the first pattern 50B and the second pattern 50C when the circuit board 40 is viewed from the plate thickness direction (FIG. 6). See 9).
  • the second magnetic material 50E and one surface of the circuit board 40 are in contact with each other via an adhesive.
  • the adhesive is prevented from entering the first through hole 50F and the second through hole 50K.
  • the circuit board 40 is put into the reflow furnace. In this way, the mounting of the second magnetic material 50E and other mounting components on one surface of the circuit board 40 is completed.
  • an adhesive is applied to the region where the first magnetic body 50D is arranged.
  • the first magnetic body 50D having the first insertion portion 50G to be inserted into the first through hole 50F is inserted into the first through hole 50F, and the first insertion portion 50G is inserted along the other surface of the circuit board 40.
  • the first magnetic material placement step of placing the magnetic material is executed. That is, the second magnetic material arranging step is executed before executing the first magnetic material arranging step.
  • the first magnetic body 50D is arranged on the other surface of the circuit board 40 by using a surface mounter or the like so as to cover the region to which the adhesive is applied. At this time, the other side of the circuit board 40 is turned upward.
  • the first insertion portion 50G of the first magnetic body 50D is inserted into the first through hole 50F, and the pair of second insertion portions 50J are inserted into the pair of second through holes 50K.
  • the entire first end portion 50N of the first insertion portion 50G and the second end portion 50P of the second insertion portion 50J come into close contact with the surface of the second magnetic body 50E facing one surface of the circuit board 40. ..
  • the first end portion 50N of the first insertion portion 50G and the second end portion 50P of the second insertion portion 50J can be flush with respect to one surface of the circuit board 40.
  • the first magnetic body 50D is arranged so as to cover the portion orbiting the first through hole 50F in the first pattern 50B and the second pattern 50C when the circuit board 40 is viewed from the plate thickness direction (FIG. 6). See 9). Then, after arranging other mounting components on the other surface of the circuit board 40, the circuit board 40 is put into the reflow furnace. In this way, the mounting of the first magnetic material 50D and other mounting components on the other surface of the circuit board 40 is completed.
  • the entire tip surface of the first end portion 50N of the first insertion portion 50G of the first magnetic body 50D and the second end portion 50P of the second insertion portion 50J faces the second magnetic material 50E (FIGS. 4 and 5). reference.).
  • each wiring 47 is a pattern formed on a flexible substrate 20 or a circuit board 40.
  • Each wiring 47 functions as a voltage detection line that transmits a signal indicating the voltage at each position of the power storage module 1, and specifically, conducts each position of the power storage module 1 with the discharge control unit 45 of the battery monitoring unit 10B. It functions as a conductive path. Since the plurality of wirings 47 are provided in this way, the voltage value at each position of the power storage module 1 is input to each terminal of the discharge control unit 45 of the battery monitoring unit 10B.
  • the signal detected by the discharge control unit 45 may be a signal capable of specifying the voltage at a predetermined position of the power storage module 1.
  • the signal may be a signal indicating the voltage value itself at a predetermined position of the power storage module 1, a signal indicating a value obtained by dividing the voltage value, or the like, and the voltage value is greater than a threshold value. It may be a signal indicating whether or not the voltage is high.
  • the signal detected by the discharge control unit 45 may be a signal capable of specifying the current flowing through the predetermined position of the power storage module 1.
  • the detection signal may be a voltage signal indicating the value of the current flowing through the predetermined position, a signal indicating whether or not the current flowing through the predetermined position is higher than the threshold value, or the like. It may be a signal indicating whether or not the current flowing through the predetermined position is within the predetermined range.
  • the signal detected by the discharge control unit 45 may be a signal capable of specifying the temperature at a predetermined position of the component assembled to the power storage module 1 or the circuit board 40.
  • the detection signal may be a voltage signal indicating the temperature of the predetermined position, a signal indicating whether or not the temperature of the predetermined position is higher than the threshold value, or the like, and may be a signal indicating whether or not the temperature of the predetermined position is higher than the threshold value. It may be a signal indicating whether or not the temperature is within a predetermined range.
  • a plurality of power storage elements 1A are electrically connected in series in a part or all of the power storage module 1.
  • the battery monitoring unit 10B in the power storage module 1 is electrically connected to the inter-battery electrode portion or the end electrode portion of a plurality of power storage elements 1A connected in series via wiring 47.
  • Each of the wirings 47 conducts with the electrode portion to which the wiring 47 is connected, and inputs a signal indicating the voltage of the electrode portion to which the wiring 47 is connected to the discharge control unit 45.
  • the discharge control unit 45 and the cell balance circuit 43 can cooperate with each other to perform a cell balance operation.
  • the discharge control unit 45 starts the cell balance operation when a cell balance command is given from another device.
  • the potential difference (voltage between terminals) between the positive electrode P and the negative electrode N is the smallest among the parts to which the cell balance circuit 43 is assigned in the power storage module 1 during the cell balance operation.
  • the power storage element 1A is detected.
  • the discharge control unit 45 sets the voltage of the other storage elements 1A other than the “storage element 1A that minimizes the potential difference between the positive electrode P and the negative electrode N” to the “storage element 1A that minimizes the potential difference between the positive electrode P and the negative electrode N”.
  • the discharge unit 43B of the cell balance circuit 43 is made to perform the discharge operation to match the voltage of.
  • the discharge control unit 45 can operate the cell balance circuit 43 as a passive cell balance circuit.
  • the discharge operation for equalization can be performed by using a plurality of discharge units 43B having resistors 43A provided corresponding to the plurality of power storage elements 1A.
  • the cell balance circuit 43 and the cell balance operation exemplified here are merely examples, and another cell balance circuit or another cell balance operation may be used.
  • the battery monitoring unit 10B formed on the circuit board 40 functions as a protective operation unit.
  • the protection operation unit performs a protection operation that suppresses an increase in ambient temperature when the temperature detected by the thermistor 42 is equal to or higher than a threshold value.
  • the discharge control unit 45 continuously monitors the temperature signal from the thermistor 42. Then, the discharge control unit 45 determines the resistor of the cell balance circuit 43 when the temperature signal from the thermistor 42 is equal to or higher than the threshold value, that is, when the temperature value indicated by the temperature signal output by the thermistor 42 is equal to or higher than the threshold value.
  • a protective operation is performed to suppress the temperature rise of 43A and the temperature rise of the power storage element 1A.
  • the discharge control unit 45 stops the cell balance operation when the temperature signal from the thermistor 42 is equal to or higher than the threshold value when the cell balance circuit 43 is performing the cell balance operation described above.
  • the insulating transformer 50 includes a circuit board 40 in which the first through hole 50F is formed, a first pattern 50B arranged around the first through hole 50F in the circuit board 40, and a first through hole 50F in the circuit board 40.
  • the second magnetic body 50E includes a second pattern 50C arranged around and insulated from the first pattern 50B, and a magnetic body portion 50A having a first magnetic body 50D and a second magnetic body 50E.
  • the first magnetic body 50D has a first insertion portion 50G in which at least a part thereof is inserted into the first through hole 50F, and the circuit of the first insertion portion 50G.
  • the first end portion 50N on one surface side of the substrate 40 is arranged so as to face the second magnetic body 50E, and the external dimensions of the second magnetic body 50E in the first direction Di along one surface are the first direction Di. It is larger than the external dimension of the first end portion 50N in.
  • the isolation transformer 50 is electrically difficult to be arranged because the first end portion 50N of the first insertion portion 50G is difficult to be arranged at the manufacturing stage so as to be displaced from the facing surface (the surface facing one surface of the circuit board 40) of the second magnetic body 50E.
  • the characteristics are easy to stabilize.
  • a part of the second magnetic body 50E can be arranged so as to project from the first end portion 50N of the first insertion portion 50G in the first direction Di, the overhanging portion is also magnetically caused by the magnetic material. Can have an impact.
  • One surface is a plate surface on one side in the thickness direction (plate thickness direction) of the circuit board 40.
  • one second through hole 50K is formed on at least one side of the first through hole 50F in the first direction Di, and the insertion portion 50Q is inserted into the first through hole 50F. It has one insertion portion 50G and one or more second insertion portions 50J to be inserted into the second through hole 50K, and has a first end portion 50N and a second insertion portion 50J on one side of the first insertion portion 50G.
  • the second end portion 50P on one side of the above is aligned with the first direction Di, and the external dimensions of the second magnetic body 50E in the first direction Di are the ends including the first end portion 50N and the second end portion 50P. It is larger than the external dimensions of the first direction Di of the entire portion 50R.
  • the second magnetic material 50E can be arranged so as to project from the first end portion 50N of the first insertion portion 50G and the second end portion 50P of the second insertion portion 50J in the first direction Di. Therefore, the magnetic influence caused by the magnetic material can be satisfactorily generated even in the overhanging portion.
  • the end portion 50R is joined to the second magnetic body 50E.
  • the configuration includes a configuration in which the end portion 50R is contacted without being bonded to the second magnetic material 50E.
  • the external dimension of the second magnetic body 50E is larger than the external dimension of the end portion 50R in any direction along one surface.
  • the isolation transformer 50 includes a thermistor 42 that detects the temperature of the circuit board 40, and the thermistor 42 is provided on the circuit board 40 around at least one of the first magnetic body 50D and the second magnetic body 50E.
  • the isolation transformer 50 can detect the temperature of the circuit board 40 by the thermistor 42, so that the operation based on the temperature of the circuit board 40 provided with the first magnetic body 50D and the second magnetic body 50E can be performed. It will be possible.
  • the periphery of the first magnetic body 50D is a position on the circuit board 40 that is affected by the temperature change of the first magnetic body 50D. Specifically, a position closer to the first magnetic body 50D than the outer edge of the circuit board 40 is located. desirable.
  • the periphery of the second magnetic body 50E is a position on the circuit board 40 that is affected by the temperature change of the second magnetic body 50E. Specifically, a position closer to the second magnetic body 50E than the outer edge of the circuit board 40 is located. desirable.
  • the isolation transformer 50 includes a thermistor 42 that detects the temperature of the circuit board 40 and a battery monitoring unit 10B that performs a protective operation that suppresses a temperature rise of the circuit board 40 when the temperature detected by the thermistor 42 is equal to or higher than a threshold value. I have. As a result, it is possible to prevent the temperature of the circuit board 40 provided with the first magnetic body 50D and the second magnetic body 50E from rising due to the thermistor 42 and the battery monitoring unit 10B. Thereby, the temperature rise of the circuit board 40 caused by the first magnetic body 50D and the second magnetic body 50E can be suppressed.
  • the isolation transformer 50 is assembled to a power storage module 1 in which a plurality of power storage elements 1A are integrally provided.
  • the power storage module 1 detects the temperature of the power storage element 1A by the thermistor 42, and suppresses the temperature rise of the power storage element 1A by the battery monitoring unit 10B. If the isolation transformer 50 is provided in the power storage module 1 having such a configuration, it is possible to suppress the temperature rise of the circuit board 40 caused by the first magnetic body 50D and the second magnetic body 50E.
  • a first pattern 50B and a second pattern 50C that are insulated from each other are formed, and a first through hole 50F in which the first pattern 50B and the second pattern 50C are arranged around the first pattern 50B is formed.
  • a first magnetic body 50D having a first insertion portion 50G to be inserted into the first through hole 50F is inserted into the circuit board 40, and a first magnetic body arrangement for inserting the first insertion portion 50G into the first through hole 50F.
  • a step and a second magnetic material arranging step of arranging the second magnetic material 50E so as to face one surface of the circuit board 40 and to face the first end portion 50N of the first insertion portion 50G are provided.
  • the external dimension of the second magnetic body 50E in the first direction Di along the direction is larger than the external dimension of the first end portion 50N in the first direction Di.
  • the isolation transformer structure can be formed on the circuit board 40 by executing the first magnetic material arranging step and the second magnetic material arranging step.
  • the external dimension of the second magnetic body 50E in the first direction Di along one surface is larger than the external dimension of the first end portion 50N in the first direction Di. Therefore, a part of the second magnetic material 50E can be arranged so as to project from the first end portion 50N of the first insertion portion 50G in the first direction Di, so that the magnetism caused by the magnetic material also in the overhanging portion. Can have a magnetic effect.
  • the second magnetic material placement step of the method for manufacturing an isolation transformer is executed before the first magnetic material placement step is executed.
  • the second magnetic body 50E is first arranged on one surface of the circuit board 40, so that the first end portion 50N of the first insertion portion 50G is brought into contact with the second magnetic body 50E. In this state, the position of the first end portion 50N of the first insertion portion 50G can be easily aligned with one surface of the circuit board 40.
  • the number of conductive layers forming the first pattern 50B and the second pattern 50C is not limited to the first embodiment.
  • the number of times the first pattern and the second pattern orbit around the first through hole in each conductive layer is not limited to the first embodiment.
  • the cell balance circuit 43 is provided on the circuit board 40. Not limited to this, a part or all of the cell balance circuit may be provided on the flexible substrate.
  • one power storage element 1A is configured by one unit battery, but the unit constituting the power storage element is not limited to this example.
  • one power storage element may be composed of a plurality of unit batteries.
  • the battery monitoring unit 10B functions as a protective operation unit.
  • a cooling unit that cools the electricity storage module by providing a water passage around the electricity storage module and flowing water through the water passage may be used as a protective operation unit.
  • the thermistor 42 is used as the temperature detection unit. Not limited to this, a resistance temperature detector, a linear resistor, or the like may be used as the temperature detection unit.
  • the first insertion portion 50G and the second insertion portion 50J are lined up along the first direction Di, that is, the first direction Di is the direction in which the first insertion portion 50G and the second insertion portion 50J are lined up.
  • the present invention is not limited to this example, and any direction other than this may be used.
  • the holes arranged on both sides of the first through hole 50F in the first direction Di are the second through holes 50K.
  • the insertion portions arranged on both sides of the first insertion portion 50G are the second insertion portions 50J.
  • the second insertion portion may be one or three or more.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne : un transformateur d'isolation ayant des caractéristiques électriques stables ; et un procédé de fabrication du transformateur d'isolation.　Un transformateur d'isolation (50) comprend : une carte de circuit imprimé (40) dans laquelle un premier trou traversant (50F) est formé ; un premier motif (50B) disposé autour du premier trou traversant (50F) ; un second motif (50C) disposé autour du premier trou traversant (50F) et isolé du premier motif (50B) ; et une section de corps magnétique (50A) ayant un premier corps magnétique (50D) et un second corps magnétique (50E). Le second corps magnétique (50E) est disposé de manière à faire face à une surface de la carte de circuit imprimé (40). Le premier corps magnétique (50D) présente une première section d'insertion (50G) au moins partiellement insérée dans le premier trou traversant (50F). Une première section d'extrémité (50N) sur une surface de la première section d'insertion (50G) est disposée de manière à faire face au second corps magnétique (50E). La dimension externe du second corps magnétique (50E) dans une première direction (Di) qui s'étend le long de la première surface, est supérieure à la dimension externe de la première section d'extrémité (50N) dans la première direction (Di).
PCT/JP2020/048883 2020-01-14 2020-12-25 Transformateur d'isolation et procédé de fabrication de transformateur d'isolation WO2021145203A1 (fr)

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JP2020-003348 2020-01-14
JP2020003348A JP2021111714A (ja) 2020-01-14 2020-01-14 絶縁トランス及び絶縁トランスの製造方法

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0677216U (ja) * 1993-03-31 1994-10-28 ミツミ電機株式会社 トランス
WO2010026690A1 (fr) * 2008-09-05 2010-03-11 三菱電機株式会社 Transformateur en feuilles pour convertisseur cc/cc
JP2018081837A (ja) * 2016-11-17 2018-05-24 株式会社オートネットワーク技術研究所 車両用のバッテリ監視装置及び車両用のバッテリ監視システム
JP2018113731A (ja) * 2017-01-06 2018-07-19 三菱電機株式会社 電力変換装置
WO2019208163A1 (fr) * 2018-04-25 2019-10-31 三洋電機株式会社 Dispositif de gestion et système d'alimentation électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0677216U (ja) * 1993-03-31 1994-10-28 ミツミ電機株式会社 トランス
WO2010026690A1 (fr) * 2008-09-05 2010-03-11 三菱電機株式会社 Transformateur en feuilles pour convertisseur cc/cc
JP2018081837A (ja) * 2016-11-17 2018-05-24 株式会社オートネットワーク技術研究所 車両用のバッテリ監視装置及び車両用のバッテリ監視システム
JP2018113731A (ja) * 2017-01-06 2018-07-19 三菱電機株式会社 電力変換装置
WO2019208163A1 (fr) * 2018-04-25 2019-10-31 三洋電機株式会社 Dispositif de gestion et système d'alimentation électrique

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