WO2013113643A1

WO2013113643A1 - High-voltage plug connector system, battery, and motor vehicle

Info

Publication number: WO2013113643A1
Application number: PCT/EP2013/051528
Authority: WO
Inventors: Claus Gerald Pflueger
Original assignee: Robert Bosch Gmbh; Samsung Sdi Co., Ltd.
Priority date: 2012-02-01
Filing date: 2013-01-28
Publication date: 2013-08-08
Also published as: EP2810343B1; EP2810343A1; DE102012201420A1; EP2810343B9

Abstract

The invention relates to a high-voltage plug connector system. The high-voltage plug connector system comprises a housing seal (28) having an opening (30) and a high-voltage plug connector having an electrical conductor (18), wherein the high-voltage plug connector is led through the opening (30) of the housing seal (28) in such a way that the housing seal (28) surrounds the high-voltage plug connector in a contacting manner. The invention further relates to a battery (14) comprising the high-voltage plug connector system and to a motor vehicle comprising the battery (14).

Description

description

title

Hochvoltsteckverbindersvstem, battery and motor vehicle

The present invention relates to a high-voltage connector system comprising a housing seal with a recess and a high-voltage connector with an electrical conductor. Furthermore, the invention relates to a battery with the high-voltage connector system according to the invention and a motor vehicle with the battery.

State of the art

It is becoming apparent that in the future, both in stationary applications, such as wind turbines, in motor vehicles, which are designed as hybrid or electric motor vehicles, as well as electronic devices, such as laptops or mobile phones, new battery systems will be used, to the very high

Requirements with regard to reliability, safety, performance and service life.

In vehicles with at least partial electric drive electrical energy storage are used to store the electrical energy for the electric motor, which supports the drive or serves as a drive. In the vehicles of the latest generation, so-called lithium-ion batteries are used. These are characterized among other things by high energy densities and an extremely low self-discharge. Lithium-ion cells have at least one positive and one negative electrode (cathode or anode), the lithium-ion (Li +) reversible on (intercalation) or outsource (deintercalation) can.

FIG. 1 shows how individual battery cells 10 can be combined to form battery modules 12 and then batteries 14. This is not done by one By definition, a battery module 12 and a battery 14 consist of at least two battery cells 10, the terms battery 14 and

Battery module 12 are often used interchangeably. The electrical voltage of a battery 14 is for example between 120 and 600 volts

DC.

The individual battery cells 10 of a battery 14 are normally disposed within a housing, the battery housing. Due to the system, this housing has several electrical interfaces. At present, low-voltage and high-voltage connectors (colloquially plugs, actually built-in plugs or sockets) are used as interfaces in the housing. The

Housing currently needs for use in a road vehicle

Tightness classes IP6K9K and IP6K7 meet. The low-voltage connectors can also be integrated into the housing seal according to the prior art. In this case, the required tightness is ensured both in the mated and unmated state of the low-voltage connector. The

High-voltage connectors have hitherto generally been attached to the housing as separate components. These high-voltage connectors meet the

Tightness requirements when plugged in.

From DE 10 2009 043 516 A1 a high-voltage connector system for mounting on a housing is known, which is a pair of

High-voltage connectors in the form of a built-in connector and a clutch comprises. The mounting plug is firmly mounted to a housing while in the

Clutch two electrical conductors are guided. The transition between the two conductors and the housing of the coupling is by means of seals

sealed. Likewise, in the inserted state, the transition between plug and socket is sealed by means of a seal.

Disclosure of the invention

According to the invention, a high-voltage connector system is provided. This includes a housing seal with a recess and a

High-voltage connector with an electrical conductor, wherein the

High-voltage connector passed through a recess of the housing seal is. This is done in such a way that the housing seal surrounds the high-voltage connector.

The high-voltage connector system according to the invention is understood to mean a combination of a housing seal and a high-voltage connector. The high-voltage connector and thus the conductor are designed to be suitable for high-voltage systems, preferably greater than a voltage of 400 V (usually up to 2.75 kV). In addition, the

High-voltage connector preferably designed to be suitable for high currents greater than 700 A (usually up to several 1000 A) and therefore has a good electrical conductivity.

The head of the high-voltage connector can in principle be a male or female contact pin, so that the high-voltage connector a

Built-in plug or a socket is. In principle, the high-voltage connector may comprise any number of conductors, preferably comprises a

High-voltage connector a plurality of conductors, in particular two conductors, so that two or more poles are passed through the housing seal. In general, the housing seal is circumferential, so closed in itself, so that the housing seal is particularly adapted to a transition or gap between two different housing parts, ie, for. B. seal the transition between two housing halves of a housing all around. The housing halves are in particular the halves of a

Battery case. The high-voltage connector is through a recess of the

Housing seal passed so that it rests in particular all around the high-voltage connector. Sometimes, such housing seals are also referred to by the English term "wind ow gasket." The high-voltage connector system according to the invention has the advantage that no separate high-voltage connectors need be attached to the housing, thus eliminating the need to install the high-voltage connectors and the separate sealing of the high-voltage connectors The housing for the high-voltage connectors does not have to be provided with corresponding openings, it can also be made up of two identical parts High-voltage connectors are tight when plugged in as well as unplugged.

According to a preferred embodiment of the invention, the

High-voltage connector on a groove in which the housing seal is located.

Through the groove, the position of the high-voltage connector is relative to

Housing seal fixed. In addition, the groove creates a space for the

Housing seal, so that the high-voltage connector of the housing parts, eg. B. the housing halves, can be clamped. The groove is also preferably formed around the high-voltage connector around the circumference, so that the housing seal extends around the plug within the groove.

Further preferably, the high-voltage connector is formed divisible, so that a part of the high-voltage connector, which forms a side surface of the groove, is removable. By this configuration, an easier installation of the

High-voltage connector achieved with the housing seal. So can the

Housing seal are pushed laterally into the groove. Subsequently, the part of the high-voltage connector, which forms the one side surface of the groove, assembled with the remaining high-voltage connector, so that the housing seal is within the groove. To implement this variant, the high-voltage connector preferably has a dividing plane which runs through the groove bottom and divides the high-voltage connector down to the conductor. The division plane preferably runs normal to the longitudinal extent of the conductor.

Between the conductor and housing seal insulation is preferably arranged. The insulation encloses the conductor around the circumference, so that the conductor is insulated in the radial direction. The isolation can in particular a

Be ceramic insulation.

Between the insulation and the conductor is preferably a secondary seal, for. B. a sealing ring, in particular an O-ring arranged. As a rule, the secondary seal surrounds the conductor and is clamped between the conductor and the insulation. As a result, the transition between the conductor and insulation in the conductor longitudinal direction is sealed even in the unplugged state. Adjacent to the insulation, a connector jacket is preferably arranged. The connector sheath represents the plug geometry and thus realizes a contact protection of the conductor. It also ensures that only the right plug or the right coupling can be plugged with the high-voltage connector.

According to a preferred embodiment of the invention, the

High-voltage connector one shield. The shield is preferably applied to the connector shell and surrounds the high-voltage connector. Preferably, the shield is adapted to one of the housing seal

To contact sealed housing. Further preferred is the

High-voltage connector sheathed on both sides of the seal by a shield.

Preferably, a low-voltage feedthrough is integrated in the high-voltage connector. The high-voltage connector thus serves not only to carry out a high-voltage connector through the housing seal, but also to carry out a low-voltage connector.

Further preferably, the high-voltage connector is designed so that a strain relief is integrated, so that tensile forces of the connected cable can be absorbed by the strain relief.

Furthermore, a complementary high-voltage connector is proposed, which is designed to be plugged together with the high-voltage connector. The conductor of the complementary high-voltage connector is a female contact pin when the contact pin of the high-voltage connector is a male contact pin and vice versa.

Furthermore, a battery comprising the inventive

High-voltage connector system provided. The housing seal seals in particular a transition between two housing parts z. B. two housing halves of the battery case around the circumference. Preferably, the battery is a lithium-ion battery having a plurality of lithium-ion battery cells (secondary cells). Lithium-ion battery cells are characterized by high energy and power densities.

Furthermore, a motor vehicle comprising the battery according to the invention is made available, wherein the battery is generally provided for feeding an electric drive system of the motor vehicle.

Advantageous developments of the invention are specified in the subclaims and described in the description.

drawings

Embodiments of the invention will be explained in more detail with reference to the drawings and the description below. Show it:

1 shows a battery cell, a battery module and a battery,

FIG. 2 is a sectional view of the high-voltage connector system;

Figure 3 is a plan view of the high-voltage connector system, and

Figure 4 is a three-dimensional view of a housing seal.

FIG. 1 has already been discussed to explain the state of the art

Figure 2 shows a sectional view of the invention

Hochvoltsteckverbindersystems with a housing seal 28 and a high-voltage connector in the installed state between an upper housing part 16 and a lower housing part 17. The sectional plane extends through the center line of an illustrated and not cut rotationally symmetrical electrical conductor 18. As can be seen in Figure 3, the high-voltage connector comprises two electrical conductors 18, which are passed through the housing seal 28. The high-voltage connector shown is divisible, so that a part of the high-voltage connector, which forms a side surface of the groove, is removable. In the case shown, a first insulation 22 and a second insulation 23 form the insulation. The connector shell is formed in two parts by the first connector shell 20 and the second connector shell 21, as well as the shield, which includes a first shield 24 and a second shield 25. The removable part is formed in this case of the second connector shell 21 with the second shield 25. The first insulation 22 encloses the conductors 18, so that they are very high

Strains are mutually insulated and relative to the housing seal 28 and the housing. The housing seal 28 surrounds the

High-voltage connector within a circumferential groove around the high-voltage connector, wherein the first insulation 22 forms the groove bottom. Between each conductor 18 and the first insulation 22 secondary seals 26 are arranged, which may be formed as O-ring seals and may also extend in grooves. The secondary seals 26 seal the transitions between the first insulation 22 and the conductors 18 in the conductor longitudinal direction. A side surface of the groove is formed by the first connector shell 20, which rests against the first insulation 22 and this partially enveloped. The first connector shell 20 forms the plug geometry of

High-voltage connector, and ensures that only suitable complementary high-voltage connectors can be plugged. Outside at the first

Plug casing 20 adjacent is the first (in this case outer)

Shield 24 is arranged, which surrounds the connector shell and thus the high-voltage connector.

The illustrated in the drawing left of the housing seal 28 part of the high-voltage connector is constructed similarly. The second insulation 23 surrounds the conductors 18 and the second plug casing 21 surrounds the second insulation 23. Seals, such as the secondary seals 26 shown in the right-hand part of the drawing, can be dispensed with, since the interior of the

Housing (left in Figure 2) is already sealed by the side seals 26 from outside the housing (right in Figure 2). Outside the second connector shell 21 fitting the second shield 25 arranged, which the second connector shell 21 and thus the

High-voltage connector wrapped. Through this structure is the

High-voltage connector formed divisible. In this case, the

Housing seal 28 are pushed laterally into the groove of the high-voltage connector in the absence of plug casing 21, and then fixed with the second connector shell 21. The second

Plug casing 21 may, for example, be positively or frictionally connected to the second insulation 23.

The high-voltage connector system is squeezed by the upper housing part 16 and the lower housing part 17 so that the housing seal 28 is compressed and at the same time the shields 24, 25 are contacted.

FIG. 3 shows a top view from the right onto that known from FIG

High-voltage connector system. The conductors 18 are insulated from each other by the insulation 22. Furthermore, the high-voltage connector can be used to realize in addition to the high-voltage bushings and low-voltage bushings 19 through the high-voltage connector. These are also isolated by the insulation 22 of the conductors 18.

FIG. 4 shows a housing seal 28. The housing seal 28 is designed to run all around and in a closed manner, so that these are

For example, seals the transition between two housing parts. The housing seal 28 also has a recess 30. Die

Recess 30 is adapted to abut on a, passed through it, high-voltage connector around the circumference and to encompass this.

Claims

claims

1 . High-voltage connector system comprising a housing seal (28) with a recess (30) and a high-voltage connector with an electrical conductor (18), wherein the high-voltage connector through the

Recess (30) of the housing seal (28) is guided, such that the housing seal (28) engages around the high-voltage connector.

2. high-voltage connector system according to claim 1, wherein the

High-voltage connector has a groove in which the housing seal (28) is located.

3. high-voltage connector system according to claim 2, wherein the

High-voltage connector is formed divisible, so that part of the

High-voltage connector, which forms a side surface of the groove, is removable.

4. High-voltage connector system according to one of the preceding claims, wherein an insulation (22, 23) between the electrical conductor (18) and the housing seal (28) is arranged.

5. High-voltage connector system according to claim 4, wherein the insulation (22, 23) is a ceramic insulation.

6. high-voltage connector system according to one of claims 4 to 5, wherein between the insulation (22, 23) and the electrical conductor (18) has a secondary seal (26) is arranged

7. High-voltage connector system according to one of claims 4 to 6, wherein on the insulation (22, 23) fitting a connector shell (20, 21) is arranged.

8. High-voltage connector system according to one of the preceding claims, wherein the high-voltage connector comprises a shield (24, 25).

9. High-voltage connector system according to one of the preceding claims, wherein a low-voltage feedthrough (19) is integrated in the high-voltage connector.

10. Battery (14) comprising the high-voltage connector system according to one of claims 1 to 9.

1 1. Motor vehicle comprising the battery (14) according to claim 10.