阅读说明：本技术 控制单元和电加热装置 (Control unit and electric heating device ) 是由 纪尧姆·多东 尼古拉斯·埃德尔 雅克·弗热尔 杰罗姆·斯托克尔 于 2021-06-17 设计创作，主要内容包括：本发明涉及一种用于电加热装置的控制单元(1),具有第一和至少一个第二壳体部件(3、2、4),这些部件中的每个在内侧上联合地界定壳体内部(5)并将壳体内部与控制单元的外部环境(6)分离,控制单元具有分别在外侧上布置在第一壳体部件(3)上的低压和高压接口(7、8)并且具有控制电子器件(9),该控制电子器件容纳在壳体内部中并且借助于电低压线(10)电连接到低压接口(7)并借助于电高压线(11)电连接到高压接口(8),在其线端部(12)处布置在壳体内部中的低压和/或高压线包括至少一个第一压配合元件(13),第一压配合元件将控制电子器件电连接到相关接口并与存在于控制电子器件上的第二压配合元件形成压配合。(The invention relates to a control unit (1) for an electric heating device, comprising a first and at least one second housing part (3, 2, 4), each of which jointly delimits a housing interior (5) on the inside and separates the housing interior from an external environment (6) of the control unit, comprising low-voltage and high-voltage connections (7, 8) which are each arranged on the outside on the first housing part (3), and comprising control electronics (9) which are accommodated in the housing interior and are electrically connected to the low-voltage connections (7) by means of low-voltage lines (10) and to the high-voltage connections (8) by means of high-voltage lines (11), wherein the low-voltage and/or high-voltage lines arranged in the housing interior at the line ends (12) thereof comprise at least one first press-fit element (13) which electrically connects the control electronics to the relevant connection and to a second press-fit element present on the control electronics The engagement elements form a press fit.)

1. A control unit (1) for an electric heating device, in particular for a motor vehicle,

-having a first and at least one second housing part (3, 2, 4), each of which jointly delimits a housing interior (5) on the inside and separates the housing interior (5) from an external environment (6) of the control unit (1), preferably in a dust-tight and liquid-tight manner,

-having a low-pressure and a high-pressure connection (7, 8), each of the low-pressure and high-pressure connections (7, 8) being arranged on the first housing part (3) on the outside,

-having control electronics (9) which are accommodated in the housing interior (5) and which are electrically connected to the low-voltage interface (7) via an electrical low-voltage line (10) and to the high-voltage interface (8) via an electrical high-voltage line (11),

-wherein the low-voltage and/or high-voltage line (10, 11) arranged in the housing interior (5) at its line end (12) comprises at least one first press-fit element (13) which electrically connects the control electronics (9) to the associated interface (7, 8) and forms a press-fit with a second press-fit element present on the control electronics (9).

2. The control unit (1) according to claim 1,

it is characterized in that the preparation method is characterized in that,

-the first housing part (3) material comprises uniformly an interface wall (14) and a carrier portion (15),

-wherein the first housing part (3) delimits with its interface wall (14) on the inside a housing interior (5), and the carrier part (15) protrudes on the inside from the interface wall (14) and into the housing interior (5),

-wherein the high-pressure and low-pressure interfaces (7, 8) are arranged on an interface wall (14),

-wherein the first press-fit element (13) of the low-voltage and/or high-voltage line (10, 11) is arranged on the carrier part (15).

3. The control unit (1) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the first housing part (3) delimits a housing interior (5) by means of its interface wall (14) in a dust-tight and liquid-tight manner in conjunction with the second housing part (2, 4).

4. The control unit (1) according to any one of claims 1 to 3,

it is characterized in that the preparation method is characterized in that,

a seal is present between the first and second housing parts (3, 2, 4).

5. The control unit (1) according to claims 3 and 4,

it is characterized in that the preparation method is characterized in that,

the seal is arranged between a periphery (16) of the interface wall (14) and the second housing part (2, 4), wherein a circumferential groove (17) is preferably recessed on the periphery (16), in which circumferential groove the seal is partially accommodated.

6. The control unit (1) according to any one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

-the low voltage line (10) comprises a low voltage busbar (18),

-the low voltage busbar (18) is embedded in sections in the material of the first housing part (3), preferably overmoulded with the material of the first housing part (3).

7. The control unit (1) according to claim 6,

it is characterized in that the preparation method is characterized in that,

a first press-fit element (13) of the low voltage line (10) is present on the low voltage busbar (18).

8. The control unit (1) according to claim 6 or 7,

it is characterized in that the preparation method is characterized in that,

the low-voltage line (10) comprises a low-voltage busbar (18) at least in a through-section (19), in which the low-voltage line (10) passes through the first housing part (3) from the outside to the inside.

9. The control unit (1) according to any one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

-the high voltage line (11) comprises a high voltage busbar (20),

-the high voltage busbar (20) is embedded in sections in the material of the first housing part (3), preferably overmoulded with the material of the first housing part (3).

10. The control unit (1) according to claim 9,

it is characterized in that the preparation method is characterized in that,

the first press-fit element (13) of the high-voltage line (11) is present on the high-voltage busbar (20).

11. The control unit (1) according to claim 9 or 10,

it is characterized in that the preparation method is characterized in that,

the high-voltage line (11) comprises a high-voltage cable (21) at least in a through-section (19), in which the high-voltage line (11) passes through the first housing part (3) from the outside to the inside.

12. The control unit (1) according to claim 11,

it is characterized in that the preparation method is characterized in that,

the high-voltage cable (21) is electrically connected to the high-voltage busbar (20) in the housing interior (5) in an integrally bonded manner, in particular in a welded manner.

13. The control unit (1) according to any one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

an electromagnetic shield (22) is present at the high-voltage connection (8), said electromagnetic shield being electrically connected to an electrical ground (23) present on the first housing part (3).

14. The control unit (1) according to any one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

an interlock (24) is arranged on the high-voltage interface (8), by means of which interlock the high-voltage power supply (25) can be detachably electrically coupled to the high-voltage interface (8).

15. The control unit (1) according to claims 13 and 14,

it is characterized in that the preparation method is characterized in that,

the interlock device (24) is electrically connected to the electrical ground (23).

16. An electric heating device, in particular for a motor vehicle,

-having a control unit (1) according to any of the preceding claims,

-having electrical means for controlled generation of heat connected to a high voltage line (11) of the control unit (1) via a high voltage interface (8).

Technical Field

The present invention relates to a control unit for an electric heating device and to an electric heating device having such a control unit.

Background

For the controlled generation of heat, electric heating devices for motor vehicles have been equipped with control units some time ago. In this way, the high-voltage line of the control unit, via which the electrical energy fed to the electrical device can be converted into heat, is usually electrically connected to the electrical device. At the end of the electrical high voltage line of the control unit located opposite the power device, an electrical high voltage power supply is electrically connected to the high voltage line via a high voltage interface. By means of the control unit, the power fed to the power device via the high-voltage line and thus the heating output of the power device can be varied in a controlled manner. The control of the current fed to the power device is usually effected by means of a control unit which varies with a control signal which can be fed to the control unit via a low voltage interface provided on the control unit.

It has proved to be disadvantageous here that the high-voltage and low-voltage interfaces require very different configurations depending on the specifications of the high-voltage power supply or of the signal source generating the control signal. With conventional control units for electric heating devices, this entails that such control units have to be designed and produced completely differently for high-voltage power supplies or signal sources of different specifications. In addition to this, in conventional control units, the control electronics of the control unit are typically embedded inside the housing of the control unit housing for fixing the control electronics with a casting compound, which makes accessibility to the control electronics for maintenance purposes substantially more difficult or even impossible.

It is therefore an object of the present invention, in particular to eliminate the above-mentioned disadvantages, to show a control unit for an electric heating device and a new method for an electric heating device with such a control unit, which in particular solve the above-mentioned disadvantages.

Correspondingly, the basic idea of the invention is to equip a control unit for an electric heating device with at least two housing parts which jointly delimit a housing interior in which the control electronics of the control unit are arranged. There, the high-pressure and low-pressure connections of the control unit are arranged only on one of the housing parts. The control electronics of the control unit arranged inside the housing are in each case electrically connected to the high-voltage and low-voltage interfaces by means of press-fit elements.

The housing part comprising only the interface and its interface configuration can thus advantageously be adapted to high voltage power or signal sources of different specifications in a structurally simple and cost-effective manner. The remaining components can remain substantially unchanged for all specifications of high voltage power or signal sources. In addition to this, the accessibility of the control electronics for maintenance purposes can be significantly increased by electrically connecting the control electronics to the interface by means of the press-fit element.

Disclosure of Invention

The control unit according to the invention can be used for an electric heating device, in particular for a motor vehicle. The control unit comprises a first and at least one second housing part jointly delimiting a housing interior on the inside, respectively. The housing part preferably separates the housing interior from the environment outside the control unit in a dust-tight and liquid-tight manner. In addition, the control unit comprises a low-pressure and a high-pressure connection arranged on the outside on the first housing part. Furthermore, the control unit comprises control electronics which are accommodated in the housing interior and which are electrically connected to the low-voltage interface by means of an electrical low-voltage line and to the high-voltage interface by means of an electrical high-voltage line. Here, the low-voltage line, which is arranged at its line end in the housing interior, and-alternatively or additionally-the high-voltage line comprise at least one first press-fit element, which electrically connects the control electronics to the respective interface, forms a press fit with a second press-fit element which is present for this purpose on the control electronics. As indicated above, it is thus advantageously achieved that housing parts for high-voltage power supplies or signal sources of different specifications, which only comprise an interface and its interface configuration, have to be adapted in a structurally simple and cost-effective manner, which brings cost advantages. In addition to this, the fastening of the control electronics by means of a press fit makes the control electronics package obsolete inside the housing.

According to a further advantageous development of the control unit according to the invention, the first housing part comprises an interface wall and a carrier part of uniform material. The first housing part delimits the housing interior on the inside with its interface wall, wherein the carrier part protrudes beyond the interface wall on the inside and into the housing interior. The high-pressure and low-pressure connections are arranged on the connection wall. The low-voltage line and, alternatively or additionally, the first press-fit element of the high-voltage line are arranged on the carrier part. This allows a particularly space-saving implementation of the control unit.

In a further preferred development of the control unit, the first housing part delimits the housing interior in a dust-tight and liquid-tight manner by means of the interface wall in conjunction with the second housing part. In this way, the control electronics can be protected from environmental influences that threaten the function of the control electronics and can in the worst case lead to a malfunction of the control electronics.

In a further advantageous development of the control unit, a seal which is present between the first and second housing part is provided. Advantageously, the control electronics can thus be protected particularly effectively from environmental influences.

According to a further preferred development of the control unit, the sealing element is arranged between the periphery of the interface wall and the second housing part, wherein a circumferential groove is preferably recessed on the periphery, which circumferential groove partially accommodates the sealing element. This advantageously ensures a reliable seating of the seal.

A further advantageous development of the control unit proposes that the low-voltage line comprises a low-voltage busbar. The low-voltage busbar is embedded in sections in the material of the first housing part, preferably overmoulded with the material of the first housing part. Thus, a separate fastening means for fastening the low voltage line or its low voltage busbar to the first housing part can be dispensed with.

In a further preferred development of the control unit, the first press-fit element of the low-voltage line is present on the low-voltage busbar. Advantageously, the low voltage busbar provides sufficient mechanical rigidity such that it can mechanically withstand reinforcement of mechanical loads, while the press fit is created by means of the first and second press fit elements.

According to a further preferred development of the control unit, at least the low-voltage line in the same through-section as the one in which it passes through the first housing part from the outside to the inside comprises a low-voltage busbar. This allows a particularly compact construction of the control unit.

A further advantageous development provides that the high-voltage line comprises a high-voltage busbar. The high-voltage busbar is embedded in the material of the first housing part at a specific section, preferably overmoulded with the material of the first housing part. Thus, a separate fastening means for fastening the high voltage line or its high voltage busbar to the first housing part can be omitted.

In a further advantageous development of the control unit, the first press-fit element of the high-voltage line is present on the high-voltage busbar. The high-voltage busbar advantageously provides sufficient mechanical rigidity so that it can easily withstand mechanically loaded reinforcements, while the press fit is created by means of the first and second press-fit elements.

In a further preferred development of the control unit, the high-voltage line comprises a high-voltage cable at least in the same passage section as the one in which the high-voltage line passes through the first housing part from the outside to the inside. Such high voltage cables are advantageously capable of transmitting primary power.

In practice, the high-voltage cable is electrically connected to the high-voltage busbar inside the casing in an integrally bonded (in particular soldered) manner. This provides a particularly cost-effective possibility of producing the high-voltage line and thus the entire control unit.

A further advantageous development of the control unit provides that an electromagnetic shield is present at the high-voltage interface, which electromagnetic shield is electrically connected to an electrical ground present on the first housing part. Any electromagnetic field that develops spontaneously during the coupling of the electrical high-voltage power supply to the high-voltage interface can therefore be effectively kept away from these surroundings of the control unit and the device present in the surroundings, which is advantageous with respect to the electromagnetic compatibility of the control unit.

According to a further preferred development of the control unit, an interlock is arranged on the high-voltage interface, by means of which interlock the high-voltage power supply can be electrically coupled in a detachable manner to the high-voltage interface. This ensures a reliable coupling of the high voltage power supply on the control unit.

According to a further advantageous development, the interlock can be electrically connected to the electrical ground. In this way, the electrical grounding of the heating device can also be realized by means of the interlock. This simplifies the technical design of the heating device using the control unit.

The invention further relates to an electric heating device, in particular for a motor vehicle. The electric heating device comprises a control unit according to the invention as described above. Furthermore, the electric heating device comprises an electric device for controlled generation of heat, which is connected to the high voltage line of the control unit via a high voltage interface. The advantages of the control unit according to the invention shown above also apply to the heating device according to the invention having such a control unit.

Further important features and advantages of the invention can be taken from the dependent claims, the figures and the associated description of the figures in accordance with the figures.

It is to be understood that the features mentioned above and still to be explained below can be used not only in the respective combinations stated but also in other combinations or in isolation, without departing from the scope of the present invention.

Preferred exemplary embodiments of the invention are illustrated in the figures, and are described in more detail in the following description, wherein like reference numerals indicate identical or similar or functionally identical components.

Drawings

In each case, it shows schematically:

figure 1 shows in perspective one example of a control unit according to the invention,

fig. 2 shows the control unit of fig. 1 in a perspective representation, with the second housing part of the control unit removed,

fig. 3 to 5 show different perspective details of the control unit of fig. 1 and 2.

Detailed Description

In fig. 1, a control unit 1 according to the invention is exemplarily shown, which can be part of an electrical heating device (not shown in more detail in the figure) according to the invention. Such a heating device with a control unit can be part of a motor vehicle. The heating means comprise electrical means for controlled generation of heat, which are connected to the high voltage line 11 of the control unit via the high voltage interface 8, which electrical means are likewise not shown in the figure.

In the example of fig. 1, the control unit comprises one first housing part 3 and two second housing parts 2, 4. The first and second housing parts 3, 2, 4 jointly delimit a housing interior 5 on the inside in each case. The housing parts 3, 2, 4 separate the housing interior 5 from the environment 6 outside the control unit 1. By means of the housing parts 3, 2, 4, the housing interior 5 can be separated from the external environment 6 in a dust-tight and liquid-tight manner. On the outside of the first housing part 3, a low-pressure connection 7 of the control unit 1 is arranged. In addition to this, the high-pressure connection 8 of the control unit 1 is arranged on the outside of the first housing part 3. Furthermore, the control unit 1 comprises control electronics 9, which are accommodated in the housing interior 5 and are not shown in greater detail in the figures.

Fig. 2 shows the control unit of fig. 1 in a perspective representation, with the second housing parts 2, 4 and the control electronics 9 hidden for greater clarity. The control electronics 9, which are not shown, are electrically connected to the low-voltage interface 7 by means of a low-voltage line 10, which can be seen in fig. 2. In addition to this, the control electronics 9 are electrically connected to the high-voltage interface 8 by means of a high-voltage line 11. The low-voltage line 10 and, alternatively or additionally, the high-voltage line 11 comprise at least one first press-fit element 13 arranged in the housing interior at its line end 12. This first press-fit element 13, which electrically connects the control electronics 9 to the associated interface 7, 8, forms a press-fit with a second press-fit element (but not shown in the drawings) present on the control electronics 9. In the example shown, the high-voltage line 11 and the low-voltage line 10 are each equipped with a plurality of such first press-fit elements 13. The first press-fit element 13 and the not shown second press-fit element can be matched to one another in such a way that the first press-fit element 13 can be accommodated in a receptacle of the second press-fit element, or vice versa.

Fig. 2 furthermore shows that the first housing part 3 comprises an interface wall 14 of homogeneous material and a carrier part 15. With its interface wall 14, the first housing part 3 delimits the housing interior 5 on the inside. On the inner side, the carrier part 15 protrudes from the interface wall 14, so that the carrier part 15 protrudes into the housing interior 15. The high-voltage and low-voltage connections 7, 8 are arranged on the connection wall 14, while the first press-fit elements 13 of the low-voltage and high-voltage lines 10, 11 are arranged on the carrier part 15.

As shown in fig. 1, the first housing part 3 delimits a housing interior 5 in a dust-tight and liquid-tight manner in conjunction with the second housing part 2, 4 by means of its interface wall 14. Here, a seal is present between the first and second housing parts 3, 2, 4. A seal is arranged between the perimeter 16 of the interface wall 14 and the second housing part 2, 4.

A circumferential groove 17 can be recessed on the perimeter 16 of the interface wall 14 as seen in fig. 2. The seal is or can be partially received in the groove 17.

Fig. 3 shows a perspective detailed representation of the control unit 1 of fig. 1 and 2. It can be seen that the low voltage line 10 includes a low voltage bus 18. The low-voltage busbar 18 is embedded in sections in the material of the first housing part 3. In the example shown, the low voltage busbar 18 is overmoulded with the material of the first housing part 3. Here, the first press-fit elements 13 of the low-voltage lines 10 are present on the same low-voltage busbar 18. The low voltage line 10 comprises a through section 19 in which it passes through the first housing 3 from the outside to the inside. At least in the through section 19, the low voltage line 10 comprises a low voltage busbar 18 or the low voltage line is formed as a low voltage busbar 18 in the through section 19.

In fig. 4, another perspective detailed representation of the control unit of fig. 1 to 3 is shown. Correspondingly, the high voltage line 11 comprises a high voltage busbar 20. The high-voltage busbar 20 is embedded in sections in the material of the first housing part 3. In the example shown, the high voltage busbar 20 is overmoulded with the material of the first housing part 3. The first press-fit element 13 of the high-voltage line 11 is present here on the same high-voltage busbar 20.

Fig. 2 also shows that the high-voltage line 11 has a through-section, in which the high-voltage line 11 passes through the first housing part 3 from the outside to the inside. In this through section 19 of the high voltage line 11, the high voltage line 11 comprises a high voltage cable 21 or the high voltage line 11 is formed as a high voltage cable 21. In the housing interior 5, a high-voltage cable 21 is electrically connected to the high-voltage busbar 20 in an integrally bonded manner. For example, the high voltage cable 21 is soldered to the high voltage bus bar 20.

In fig. 5, another perspective detail view of the control unit of fig. 1 to 4 is shown. Correspondingly, an electromagnetic shield 22 is present on the high-voltage interface 8. The electromagnetic shield 22 is electrically connected to an electrical ground 23 present on the first housing part 3. Furthermore, an interlock 24 is arranged on the high-voltage interface 8, by means of which interlock a high-voltage power supply 25 (see fig. 1) can be detachably electrically coupled to the high-voltage interface 8. The interlock 24 may be electrically connected to the electrical ground 23.