Motor vehicle traction battery module

Abstract

A motor vehicle traction battery module includes a rigid battery module housing having at least one battery element. The battery module housing has at least one planar and liquid-cooled housing. The liquid-cooled housing wall has at least one continuously linear coolant cooling channel and at least one continuously linear empty channel, which is parallel thereto and through which there is no liquid flowing. The liquid-cooled housing wall has a contact-making opening, by means of which exclusively the empty channel is interrupted, and wherein an electrical terminal element is arranged in the region of the contact-making opening, with electrical contact being made with at least one battery element by means of said electrical terminal element.

Claims

1. A motor vehicle traction battery module comprising: a rigid battery module housing defining a hollow interior region and having at least one planar and liquid-cooled housing wall surrounding the hollow interior region, at least one battery element positioned within the hollow interior region of the housing, wherein the liquid-cooled housing wall has (i) at least one continuously linear coolant cooling channel and (ii) at least one continuously linear empty channel that is parallel to the continuously linear coolant cooling channel and through which no liquid flows, wherein the liquid-cooled housing wall has a contact-making opening, by way of which exclusively the empty channel is interrupted, and wherein an electrical terminal element is arranged in the region of the contact-making opening, with electrical contact being made with at least one battery element by said electrical terminal element, and the electrical terminal element is further arranged within the hollow interior of the housing and at a location beneath the at least one continuously linear empty channel.

2. The motor vehicle traction battery module as claimed in claim 1, further comprising at least two battery elements that electrically contact the electrical terminal element.

3. A motor vehicle traction battery module comprising: a rigid battery module housing having at least one planar and liquid-cooled housing wall, at least one battery element positioned within an interior of the housing, wherein the liquid-cooled housing wall has (i) at least one continuously linear coolant cooling channel and (ii) at least one continuously linear empty channel that is parallel to the continuously linear coolant cooling channel and through which no liquid flows, wherein the liquid-cooled housing wall has a contact-making opening, by way of which exclusively the empty channel is interrupted, and wherein an electrical terminal element is arranged in the region of the contact-making opening, with electrical contact being made with at least one battery element by said electrical terminal element, wherein the battery module housing has a separating wall that is arranged in the interior of the housing between two battery elements of the at least one battery element.

4. The motor vehicle traction battery module as claimed in claim 3, wherein the separating wall is arranged parallel to a longitudinal direction of the cooling channel and the empty channel.

5. The motor vehicle traction battery module as claimed in claim 3, wherein the separating wall is connected to the liquid-cooled housing wall in a region of the empty channel, and the contact-making opening is provided in a region of the separating wall.

6. The motor vehicle traction battery module as claimed in claim 1, wherein all of the empty channels are arranged together between two cooling channels of the at least one cooling channel.

7. The motor vehicle traction battery module as claimed in claim 6, wherein all of the empty channels are arranged in a center of the liquid-cooled housing wall.

8. The motor vehicle traction battery module as claimed in claim 1, wherein the liquid-cooled housing wall and a plurality of housing walls of the rigid battery module housing are formed by a single metal extruded profile body.

9. The motor vehicle traction battery module as claimed in claim 1 further comprising a ventilation opening disposed in a proximal channel wall of the empty channel, through which ventilation opening the housing interior region is ventilated.

Description

BRIEF DESCRIPTION OF THE DRAWING FIGURES

(1) One exemplary embodiment of a motor vehicle traction battery module according to aspects of the invention will be explained in more detail below with reference to the drawings, in which:

(2) FIG. 1 shows a central cross section I-I through a schematically illustrated motor vehicle traction battery module,

(3) FIG. 2 shows an eccentric cross section II-II through the motor vehicle traction battery module shown in FIG. 1,

(4) FIG. 3 shows a schematic perspective illustration of the battery module housing, which is open on the longitudinal side, of the traction battery module shown in FIGS. 1 and 2, and

(5) FIG. 4 shows a perspective illustration of the battery module housing shown in FIG. 3 without any distal channel walls of the upper housing wall.

DETAILED DESCRIPTION OF THE INVENTION

(6) FIGS. 1-4 show schematic illustrations of a high-voltage motor vehicle traction battery module 10 comprising a rigid battery module housing 20. The battery module housing has a right-parallelepipedal shape and has six planar walls, namely a partially liquid-cooled upper housing wall 30, a lower housing wall 24 which is liquid-cooled over the entire area, two side walls 22, 23 and two end walls (not illustrated), which enclose the battery module housing 20 in fluid-tight fashion at each end.

(7) The upper housing wall 30, the lower housing wall 24 and the two side walls 22, 23 are formed from a single metal extruded profile body 20′, whereas the two end walls are connected, for example adhesively bonded or welded, in liquid-tight fashion to the extruded profile body 20′.

(8) The interior of the battery module housing 20 is divided into two battery chambers of equal size by a centrally arranged separating wall 24, wherein in each case one high-voltage battery element 11, 12, which is surrounded in each case by a flexible cell pouch, is arranged in each battery chamber. The separating wall 25 is in a parallel plane with respect to the two side walls 22, 23.

(9) The liquid-cooled housing wall 24 at the bottom has a plurality of coolant cooling channels 26, which extend in the longitudinal direction and are arranged parallel to one another, and by means of which the lower housing wall 24 can be cooled homogeneously. The liquid-cooled housing wall 30 at the top has, to the side of a central region, in each case three cooling channels 32 extending in the longitudinal direction, and, in a central region, two empty channels 34, 35 next to one another and likewise extending in the longitudinal direction. The two empty channels 34, 35 are therefore both arranged in the center of the wall and between in each case three cooling channels 32 arranged to the side of the center. The channels 32, 34, 35 in the upper liquid-cooled housing wall 30 are formed by a proximal wall part 33 and by a distal wall part 31 of the housing wall 30, which are connected to one another by corresponding vertical connecting webs.

(10) The upper liquid-cooled housing wall 30 has a contact-making opening 40 in the center, in relation to the two physical directions in the horizontal plane, wherein the housing wall 30 is completely open in this region owing to the contact-making opening 40, with the result that access to the interior of the battery module housing 20 is provided. The rectangular contact-making opening 40 is defined by four opening edge faces 41, 42, 43, of which only three faces are illustrated in FIG. 1.

(11) An electrical terminal element 14 is arranged vertically below the housing opening 40, by means of which electrical terminal element the two battery elements 11, 12 are connected electrically to one another and electrically to the outside via an electrical connecting line 15 in this region. In addition, the in total four formed empty channel sections are fluidically connected to the surrounding atmosphere via the contact-making opening 40.

(12) The proximal channel walls 34′, 35′ of the four empty channel sections of the two empty channels 34, 35 have in each case one ventilation opening 50, 51 in the vicinity of the respective end walls, through which ventilation openings the housing interior is also ventilated in these regions close to the end walls. The ventilation openings 50, 51 are used for pressure compensation of the fluidically isolated air volumes occurring in this region.