CN114467229A

CN114467229A - Electronic control device

Info

Publication number: CN114467229A
Application number: CN202080064228.0A
Authority: CN
Inventors: 佐胁敬法; 玉田裕哉; 今北翼
Original assignee: Hitachi Astemo Ltd
Current assignee: Hitachi Astemo Ltd
Priority date: 2020-01-27
Filing date: 2020-09-09
Publication date: 2022-05-10
Also published as: WO2021152899A1

Abstract

Each of the connector patterns (71-78) of the circuit board (40) has a plurality of connecting portions (61-68). The plurality of connecting parts (61-68) are composed of a plurality of first connecting parts (61-65) and a plurality of second connecting parts (66-68) which are configured in a manner of forming 2 rows. A region between the second connecting portions (66, 67) adjacent to each other is set as a blank region (91). At least a part of the specific connection portion (62) is located between the margin region (91) and the edge (42) of the circuit substrate (40). The specific pattern (72) connected to the specific connection portion (62) passes through the blank region (91).

Description

Electronic control device

Technical Field

The present invention relates to an electronic control device mounted with a heat generating component.

Background

Some electronic control devices mounted on vehicles include a circuit board on which electronic components are mounted and a case. As such an electronic control device, there is a technique disclosed in patent document 1.

The electronic control device is used for driving a three-phase electric motor and comprises: a circuit board on which electronic components such as a plurality of heat generating components are mounted; 2 connectors disposed at the edge of the circuit substrate; a housing having an opening on one surface and accommodating a circuit board; and a sealing member which is filled into the case from the opening and seals the circuit board.

One of the 2 connectors is a control connector of a control circuit for controlling switching operation of the three-phase bridge drive circuit. The other connector is a driving connector of a three-phase bridge driving circuit for driving the three-phase electric motor.

The circuit board is provided with a plurality of insertion holes into which terminals of the driving connector are inserted. The plurality of insertion holes are arranged in 2 rows along the edge of the circuit board. The plurality of insertion holes are respectively in conduction with a connector pattern provided on the circuit board.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-050274

Disclosure of Invention

Problems to be solved by the invention

A large current flows through the heat generating component compared to other electronic components. In order to cope with the large current, the terminals of the driving connector are flat. The insertion hole into which the flat plate-like terminal is inserted is elongated and has a predetermined width (hole diameter). Of course, the connector pattern drawn out from the insertion hole having a predetermined width is also set to a predetermined width in the circuit board. Therefore, when the connector pattern is drawn out from one row of the insertion holes arranged to form 2 rows, the insertion holes in the other row may become an obstacle.

The purpose of the present invention is to provide a technique for improving the degree of freedom in design of a connector pattern that can be connected to a flat-plate-shaped terminal of a connector.

Means for solving the problems

According to claim 1, there is provided an electronic control device having:

a circuit board on which a plurality of heat generating components are mounted; and a connector disposed at an edge of the circuit board, the connector including a plurality of flat plate-like terminals connected to a plurality of conductive connector patterns provided on the circuit board, respectively,

the plurality of connector patterns have a plurality of connecting portions to be connected to the plurality of terminals, respectively,

the plurality of connection portions include: a plurality of first connection portions arranged along the edge of the circuit substrate on which the connector is arranged; and a plurality of second connection portions arranged along the plurality of first connection portions and located closer to a center side of the circuit board than the plurality of first connection portions,

the area between the second connecting parts adjacent to each other is used as a blank area,

the plurality of first connection parts include a specific connection part, at least a part of which is located between the blank region and the edge of the circuit substrate,

the plurality of connector patterns include a specific pattern connected to the specific connection portion, and the specific pattern passes through the blank region.

As set forth in claim 2, it is preferable that an electronic component is mounted between the edge of the circuit substrate on which the connector is arranged and the specific connection portion.

Preferably, as defined in claim 3, the electronic component is a heat-generating component independent of the plurality of heat-generating components.

As claimed in claim 4, it is preferred that,

the connector is arranged on the first surface of the circuit substrate,

the plurality of terminals extend through the circuit substrate to a second surface of the circuit substrate on a side opposite to the first surface,

the plurality of heat generating components are all disposed on the first face,

a plurality of conductive heat generating component patterns connected to the plurality of heat generating components are provided inside the circuit board or on the first surface,

a plurality of heat dissipation patterns having electrical conductivity and heat dissipation properties are provided on the second surface,

the plurality of heat dissipation patterns are connected to the plurality of heat generating component patterns through a plurality of through holes having electrical conductivity and thermal conductivity,

the plurality of heat dissipation patterns extend to portions where the plurality of terminals are located, and are connected to the plurality of terminals, respectively.

Preferably, as claimed in claim 5, the plurality of heat generating components are covered by a single cover that diffuses heat generated from the plurality of heat generating components.

As set forth in claim 6, it is preferable that the circuit board is housed in a case having an opening, and is sealed by a sealing member made of resin filled in the case.

According to claim 7, there is provided a connector having a plurality of flat plate-like terminals which can be mounted on a circuit board, wherein,

the plurality of terminals have a plurality of connection terminals that can be connected to a plurality of connector patterns provided on the circuit board,

the plurality of connection ends include: a plurality of first connection terminals arranged along an edge of the circuit substrate on which the connector is arranged; and a plurality of second connection terminals arranged along the plurality of first connection terminals and located closer to a center side of the circuit board than the plurality of first connection terminals,

the area between the second connection ends adjacent to each other is regarded as a blank area,

the plurality of first connection ends include a specific connection end, and at least a part of the specific connection end is located between the blank area and the edge of the circuit substrate.

Effects of the invention

In claim 1, each of the connector patterns provided on the circuit board has a connecting portion to which a flat plate-like terminal independent from each other is connected. Among the plurality of connection portions, a connection portion arranged along an edge of the circuit board on which the connector is arranged is set as a plurality of first connection portions. Among the plurality of connection portions, a connection portion that is arranged along the plurality of first connection portions and is located closer to the center of the circuit board than the plurality of first connection portions is defined as a plurality of second connection portions.

If the area between the adjacent second connecting parts is set as a blank area, the plurality of first connecting parts comprise specific connecting parts, and at least one part of the specific connecting parts is positioned between the blank area and the edge of the circuit substrate. That is, at least a part of the specific connection portion (first connection portion) overlaps the blank region in a direction from the edge of the circuit substrate toward the center of the circuit substrate. In this case, the connector pattern (specific pattern) can be formed from the specific connection portion (first connection portion) toward the center of the circuit board. Therefore, the degree of freedom in designing the pattern for the connector increases.

In claim 2, the connector pattern including the specific connection portion extends from the edge of the circuit substrate toward the center side of the circuit substrate. Therefore, a space is generated between the edge of the circuit substrate and the specific connection portion. Electronic components can be mounted in the space. The space can be effectively used to miniaturize the circuit board.

In claim 3, a heat generating component is mounted between the edge of the circuit board on which the connector is disposed and the specific connection portion. Therefore, heat of the heat generating component is easily dissipated to the outside.

In claim 4, a plurality of patterns for heat-generating components, each of which has electrical conductivity and connects a plurality of heat-generating components, are provided inside or on the first surface of the circuit board. The second surface is provided with a plurality of heat dissipation patterns having electrical conductivity and heat dissipation properties. The plurality of heat dissipation patterns are connected to the plurality of heat generating component patterns through a plurality of through holes having electrical conductivity and thermal conductivity. The plurality of heat generating components are all arranged on the first surface. Since the heat generating component is not provided on the second surface, a space for disposing the heat dissipating pattern is created. The area of the heat dissipation pattern can be increased, and the heat dissipation efficiency of the heat generating component can be improved.

The plurality of heat dissipation patterns extend to portions where the plurality of terminals are located, and are connected to the plurality of terminals, respectively. Therefore, heat of the plurality of heat generating components can be dissipated to the outside from the plurality of terminals.

In claim 5, the plurality of heat generating elements are covered by a single cover that diffuses heat generated from the heat generating elements. If a plurality of heat generating components are mounted on both surfaces of the circuit board, 2 covers are necessary. When a plurality of heat generating components are concentrated on one surface and covered with a single cover, the number of components of the cover can be reduced.

In claim 6, the circuit board is housed in a case having an opening, and is sealed by a sealing member made of resin and filled in the case. Therefore, the circuit board and the heat generating component can be protected by the sealing member.

In claim 7, the connector is of a type that can be mounted on a circuit board, and has a plurality of flat plate-like terminals. The plurality of terminals have a plurality of connection ends that can be connected to respective connector patterns provided on the circuit board. Among the plurality of connection terminals, a connection terminal arranged along an edge of the circuit board on which the connector is arranged is set as a plurality of first connection terminals. Among the plurality of connection terminals, a connection terminal that is arranged along the plurality of first connection terminals and is located closer to the center of the circuit board than the plurality of first connection terminals is defined as a plurality of second connection terminals.

If the area between the adjacent second connection terminals is set as the blank area, the plurality of first connection terminals include at least a part of the specific connection terminals located between the blank area and the edge of the circuit substrate. That is, at least a part of the specific connection terminal (first connection terminal) overlaps the blank region in a direction from the edge of the circuit substrate toward the center of the circuit substrate. In this case, the connector pattern (specific pattern) can be formed from the specific connection terminal (first connection terminal) toward the center of the circuit board. Therefore, the degree of freedom in designing the pattern for the connector increases.

Drawings

Fig. 1 (a) is a perspective view of an electronic control device according to an embodiment. Fig. 1 (b) is a perspective view of a circuit board of the electronic control device of fig. 1 (a). Fig. 1 (c) is a diagram illustrating a connector mounted on the circuit board of fig. 1 (b).

Fig. 2 (a) is a diagram illustrating a first surface (front surface) of the circuit board of fig. 1 (b). Fig. 2 (b) is a diagram illustrating a second surface (back surface) of the circuit board of fig. 1 (b).

Fig. 3 (a) is a view in the direction of the arrow 3a in fig. 1 (c). Fig. 3 (b) is a diagram illustrating the connector viewed from the opening side.

Fig. 4 is a sectional view taken along line 4-4 of fig. 1 (a).

Fig. 5 is an enlarged view of a part of the second surface (back surface) of the circuit board shown in fig. 2 b.

Detailed Description

Embodiments of the present invention will be described based on the drawings. In the figure, Up indicates the upper part and Dn indicates the lower part.

< example >

Fig. 1 (a) shows an electronic control device 10 of the embodiment. The electronic control device 10 is mounted on a vehicle such as a two-wheeled vehicle to drive a three-phase electric motor.

Refer to fig. 1 (a) and 1 (b). The electronic control device 10 includes: a three-phase bridge drive circuit 11 that drives the three-phase electric motor; and a control circuit 12 for controlling the switching operation of the three-phase bridge drive circuit 11.

The three-phase bridge drive circuit 11 includes 6 heat generating components 21 to 26, 3 capacitors 13, and a drive connector 30 (connector). The 6 heat generating components 21-26 are covered by a single cover 14 for diffusing heat generated from the heat generating components 21-26.

The control circuit 12 has a control connector 15. The description of the configuration of the control circuit 12 is omitted.

The circuit board 40 on which the capacitor 13 and the heat generating components 21 to 26 are mounted is housed in a case 16 having an opening 16a and sealed by a sealing member 17 made of resin.

Refer to fig. 1 (b) and 1 (c). The driving connector 30 is provided at a first edge 42 of the front surface 41 (first surface) of the circuit board 40. The drive connector 30 includes a plurality of (e.g., 8) L-shaped and flat plate-shaped first to eighth terminals 51 to 58 and a housing 31 that accommodates a part of the terminals 51 to 58.

The flat plate-like terminals are terminals having a predetermined width, and pin-like terminals are not included. The first to eighth terminals 51 to 58 may be linear flat terminals. That is, a connector in which the normal direction of the surface 41 is the insertion direction may be used.

The circuit board 40 is provided with 8 insertion holes 61 to 68 (connection portions) into which the first to eighth terminals 51 to 58 of the connector 30 can be inserted, respectively.

Refer to fig. 2 (a). The 6 heat generating components 21 to 26 are arranged in a grid pattern of 2 rows and 3 columns. Among the 6 heat generating components 21 to 26, the heat generating components located on the second edge 43 side opposite to the first edge 42 are referred to as first to first heat generating components 21 to 23 (heat generating components), and the heat generating components located on the first edge 42 side are referred to as second to second heat generating components 24 to 26.

The first heat-generating component pattern 81 connected to the first heat-generating component 21 is provided on the front surface 41 of the circuit board 40. Similarly, on the front surface 41 of the circuit board 40, a second heat-generating component pattern 82 connected to the first heat-generating component 22 and a third heat-generating component pattern 83 connected to the first heat-generating component 23 are provided. The pattern attached to the second heat generating components 24 to 26 will not be described.

Refer to fig. 2 (b). The rear surface 44 of the circuit board 40 is provided with first to eighth connector patterns 71 to 78 that are respectively in conduction with the insertion holes 61 to 68. The connector patterns 71-78 are made of copper in a layered form. The first connector pattern 71, the second connector pattern 72, and the sixth connector pattern 76 are also 3 heat dissipation patterns having electrical conductivity and heat dissipation properties.

Of the insertion holes 61 to 68, the insertion hole disposed along the first edge 42 of the circuit board 40 is defined as a first insertion hole 61 to 65 (first connection portion). Of the insertion holes 61 to 68, those that are arranged along the first insertion holes 61 to 65 and are located closer to the center of the circuit board 40 than the first insertion holes 61 to 65 (see arrow C) are defined as second insertion holes 66 to 68 (second connection portions). The number of the first insertion holes and the number of the second insertion holes can be appropriately changed.

Refer to fig. 3 (a) and 3 (b). The housing 31 has: a holding portion 32 that holds the first to eighth terminals 51 to 58; a bottom portion 33 that faces the surface 41 of the circuit board 40 when the driving connector 30 is mounted on the circuit board 40; and a top plate 34 facing the bottom 33. The bottom portion 33 and the top plate portion 34 constitute a part of the opening 31a of the housing 31.

The first terminal 51 has a connection end 51a connectable to the first connector pattern 71 (see fig. 2 b) through the first insertion hole 61 (see fig. 2 a). Similarly, the second to eighth terminals 52 to 58 have connection ends 52a to 58a that can be connected to the second to eighth connector patterns 72 to 78 through the first to second insertion holes 62 to 68.

The connection between the terminals 51 to 58 of the driving connector 30 and the connector patterns 71 to 78 of the circuit board 40 is not limited to the insertion structure, and may be any structure as long as the terminals can be electrically connected by contact with each other.

Of the 8 connection ends 51a to 58a, the connection end disposed along the holding portion 32 of the housing 31 is referred to as a first connection end 51a to 55 a. Of the 8 connection terminals 51a to 58a, the connection terminals disposed along the first connection terminals 51a to 55a are referred to as second connection terminals 56a to 58 a. The second connection ends 56a to 58a are located farther from the holding portion 32 than the first connection ends 51a to 55 a.

The first terminal 51 has an outer end 51b connectable to a terminal of a counterpart connector. Similarly, the second to eighth terminals 52 to 58 have outer ends 52b to 58b connectable to the terminals 5 of the mating connector.

Of the 8 external ends 51b to 58b, the external end disposed along the bottom 33 of the housing 31 is referred to as a first external end 51b to 55 b. Of the 8 external terminals 51b to 58b, the external terminals disposed along the first external terminals 51b to 55b are referred to as second external terminals 56b to 58 b. The second outer ends 56b to 58b are positioned closer to the top plate 34 of the housing 31 than the first outer ends 51b to 5 b. The second external terminals 56b to 58b are connectable to a three-phase ac motor, for example, the second external terminal 58b is connected to U, the second external terminal 57b is connected to V, and the second external terminal 56b is connected to W.

Refer to fig. 4. The first connector pattern 71 (heat dissipation pattern) and the first heat-generating-component pattern 81 are connected by a plurality of first through holes 45 (via holes) having electrical conductivity and thermal conductivity. The first heat-generating member pattern 81 may be provided inside the circuit board 40. The through hole 45 may be filled inside or disposed directly below the first heat-generating component 21.

The first connection end 51a of the first terminal 51 is inserted into the first insertion hole 61 and penetrates the circuit substrate 40. Therefore, the first terminal 51 can be electrically connected to the first heat-generating member pattern 81. The first connector pattern 71 and the second heat generating component 24 overlap in the thickness direction of the circuit substrate 40.

Refer to fig. 2 (a) and 2 (b). Similarly, the sixth connector pattern 76 (heat dissipation pattern) and the sixth connector pattern 76 are connected to each other through the second through hole 46 (via hole) having electrical conductivity and thermal conductivity. The sixth terminal 56 can be electrically connected to the second heat generating component pattern 82.

The second connector pattern 72 (heat radiation pattern) and the third heat generating component pattern 83 are connected by a third through hole 47 (via hole) having electrical conductivity and thermal conductivity. The second terminal 52 can be electrically connected to the third heat generating component pattern 83.

Refer to fig. 2 (a). The first through hole 45 is located between the first and second

heat generating components

21 and 24. Similarly, the second through hole 46 is located between the first and second

heat generating components

22 and 25. The third through hole 47 is located between the first and second

heat generating components

23 and 26.

Refer to fig. 5. On the back surface 42 of the circuit board 40, a region between the second insertion holes 66 and 67 adjacent to each other is defined as a first blank region 91. A part of the first insertion hole 62 (specific connection portion) is located between the first margin area 91 and the first edge 42 of the circuit substrate 40. The second connector pattern 72 (specific pattern) that is in electrical communication with the first insertion hole 62 extends from the first edge 42 of the circuit substrate 40 toward the center of the circuit substrate 40 and passes through the first margin area 91.

Lines extending from both ends in the longitudinal direction of the first blank region 91 toward the first edge 42 are defined as a first line L1 and a second line L2. The first insertion hole 62 may also be located between the first line L1 and the second line L2.

Between the first edge 42 of the circuit board 40 and the first insertion hole 62, for example, the third heat generating component 27 is mounted as an electronic component.

The effects of the embodiment will be explained.

Refer to fig. 5. A part of the first insertion hole 62 (specific connection portion) is located between the first margin area 91 and the first edge 42 of the circuit substrate 40. Therefore, the second connector pattern 72 that is in electrical communication with the first insertion hole 62 can be extended toward the center side (see arrow C) of the circuit board 40 through the first blank region 91. The degree of freedom in design of the pattern increases.

Refer to fig. 2 (b). A region between the second insertion holes 67 and 568 adjacent to each other is set as a second blank region 92. A portion of the first insertion hole 64 is located between the second margin 92 and the first edge 42 of the circuit substrate 40. Therefore, the fourth connector pattern 74 may pass through the second margin region 92.

Refer to fig. 2 (a). Between the first edge 42 of the circuit board 40 and the first insertion hole 62, for example, the third heat generating component 27 is mounted as an electronic component. By extending the second connector pattern 72 toward the center side of the circuit board 40, a space is created between the first edge 42 of the circuit board 40 and the first insertion hole 62. A third heat generating component 27 is mounted in this space. The circuit board 40 can be miniaturized by effectively utilizing the space.

Further, since the third heat generating component 27 is disposed in the vicinity of the first edge 42 on the side where the driving connector 30 is provided (see fig. 1 c), the heat of the third heat generating component 27 is easily dissipated to the outside through the flat plate-shaped terminals 51 to 58 of the driving connector 30.

Refer to fig. 3 (a). The connector 30 is viewed from a direction opposite to the bottom 33 of the housing 31. A region between the second connection end 56a and the second connection end 57a is set as a third blank region 93. A part of the first connection end 52a (specific connection end) is located between the third margin region 93 and the holding portion 32 of the housing 31 (the first edge 42 side of the circuit substrate 40). In the circuit board 40 on which the connector 30 having such a configuration is mounted, as described above, the second connector pattern 72 (specific pattern) can be set so as to pass through the first margin area 91 (third margin area 93). The degree of freedom in design of the pattern increases.

Other effects of the embodiment will be explained.

Refer to fig. 4. The first heat-generating component pattern 81 connected to the first heat-generating component 21 is provided on the front surface 41 of the circuit board 40. The first connector pattern 71 (heat dissipation pattern) having electrical conductivity and heat dissipation properties is provided on the back surface 44 of the circuit board 40. The first pattern 71 and the first heat-generating-member pattern 81 are connected by the first through-hole 45 (via hole). All of the first to second heat generating components 21 to 26 are mounted on the surface 41 of the circuit board 40 (see fig. 2 (a)). Since no heat generating component is provided on the rear surface 44, a space for disposing the first connector pattern 71 is created. The area of the first connector pattern 71 can be increased, and the heat dissipation efficiency of the first heat-generating component 21 can be improved.

Further, the first connector pattern 71 extends to a portion where the first terminal 51 is located, and is connected to the first terminal 51. The heat of the first heat-generating component 21 is radiated to the outside from the first terminal 51.

Refer to fig. 1 (a) and 4. The first heat generating components 21 to 23 and the second heat generating components 24 to 26 are covered by the cover 14. If the second heat generating components 24 to 26 are mounted on the back surface 44 of the circuit board 40, 2 covers are necessary. The number of the covers can be reduced by concentrating the heat generating components 21 to 26 on the surface 41 and covering the heat generating components with a single cover 14.

The circuit board 40 is housed in a case 16 having an opening 16a, and is sealed by a sealing member 17 made of resin and filled in the case 16. Therefore, the circuit board 40 can be protected by the sealing member 17.

The present invention is not limited to the embodiments as long as the functions and effects of the present invention are achieved.

Industrial applicability

The electronic control device of the present invention is suitable for a two-wheeled vehicle.

Description of the reference numerals

10 … electronic control device

14 … cover

16 … casing

17 … sealing member

21 to 23 … first heat generating component(s)

24 ~ 26 … second heat generating component(s)

27 … third heat-generating component (independent of the plurality of heat-generating components)

30 … drive connector

31 … casing

32 … holding part

40 … Circuit Board

41 … surface (first side)

42 … first edge (edge)

44 … Back face (second face)

45 to 47 … first to third through holes (via holes)

51 to 58 … first to eighth terminals (terminals)

51 a-55 a … first connecting end, 52a … specific connecting end

56 a-58 a … second connection end

61-65 … first insertion holes (first connection parts) 62 … specific connection parts

66 to 68 … second insertion holes (second connection parts)

71 to 78 … first to eighth connector patterns (connector patterns)

71 … Heat dissipation Pattern

72 … Heat dissipation Pattern and specific Pattern

76 … Heat dissipation Pattern

81-83 … patterns for first-third heat-generating component (heat-generating component pattern)

91-93 … first to third blank areas

Center side of C … circuit board

Claims

1. An electronic control device, comprising: a circuit board on which a plurality of heat generating components are mounted; and a connector disposed at an edge of the circuit board, the connector including a plurality of flat plate-like terminals connected to a plurality of conductive connector patterns provided on the circuit board, respectively,

the plurality of patterns include a specific pattern connected to the specific connection portion, the specific pattern passing through the blank region.

2. The electronic control device according to claim 1,

an electronic component is mounted between the edge of the circuit substrate on which the connector is arranged and the specific connection portion.

3. The electronic control device according to claim 2,

the electronic component is a heat-generating component independent of the plurality of heat-generating components.

4. The electronic control device according to any one of claims 1 to 3,

the connector is arranged on the first surface of the circuit substrate,

the plurality of heat generating components are all disposed on the first face,

5. The electronic control device according to claim 4,

the plurality of heat-generating components are covered by a single cover that diffuses heat generated from the plurality of heat-generating components.

6. The electronic control device according to claim 4 or 5,

the circuit board is housed in a case having an opening, and is sealed by a sealing member made of resin and filled in the case.

7. A connector having a plurality of flat plate-like terminals and capable of being mounted on a circuit board, wherein,

the area between the second connection ends adjacent to each other is made a blank area,