阅读说明：本技术 机动车辆的牵引电池 (Traction battery for a motor vehicle ) 是由 M·察赫尔 J·赫布兰德 T·麦尔德 M·舒斯勒 于 2019-06-25 设计创作，主要内容包括：一种机动车辆的牵引电池(10),该牵引电池具有：由多个支撑件(19,19a,19b)装配或者组装而成的电池框架(11)；被容纳在该电池框架(11)中的、分别由多个电池单元组成的多个电池模块,这些电池单元被容纳在相应的电池模块的模块壳体(14)中,其中相应的模块壳体(14)由多个侧壁和一个底壁装配或者组装而成,并且其中相应的模块壳体(14)的底壁形成为用于冷却这些电池单元(17)的冷却板；与该电池框架(11)相连接的盖板(12)；与该电池框架(11)相连接的车底保护板(13)。(Traction battery (10) of a motor vehicle, having: a battery frame (11) assembled or assembled from a plurality of supports (19, 19a, 19 b); a plurality of battery modules each composed of a plurality of battery cells accommodated in the battery frame (11), the battery cells being accommodated in module cases (14) of the respective battery modules, wherein the respective module cases (14) are assembled or assembled from side walls and a bottom wall, and wherein the bottom wall of the respective module case (14) is formed as a cooling plate for cooling the battery cells (17); a cover plate (12) connected to the battery frame (11); a vehicle bottom protection plate (13) connected with the battery frame (11).)

1. Traction battery (10) of a motor vehicle, having:

a battery frame (11) assembled or assembled from supports (19, 19a, 19b),

a plurality of battery modules (18) which are accommodated in the battery frame (11), each of which is composed of a plurality of battery cells (17) which are accommodated in a module housing (14) of the respective battery module (18),

wherein the respective module housing (14) is assembled or assembled from a plurality of side walls (21, 21a, 21b) and a bottom wall (20),

wherein the bottom wall (20) of the respective module housing (14) is formed as a cooling plate for cooling the battery cells (17),

a cover plate (12) connected with the battery frame (11), and

a vehicle bottom protection plate (13) which is connected with the battery frame (11).

2. Traction battery according to claim 1, characterized in that the bottom wall (20) of the respective module housing (14) protrudes on two opposite narrow sides with respect to the side wall (21b) of the respective module housing (14) and has a flow inlet connection (24) on a first side in the protruding position and a return connection for the coolant on an opposite second side.

3. Traction battery according to claim 2, characterized in that the battery modules (18) are accommodated in the battery frame (11) such that the narrow sides of the module housings (14) of the battery modules (18) are in rows and thus the inlet and return connections (24, respectively) are in columns.

4. Traction battery according to claim 3, characterized in that the supports (19a) of the battery frame (11) extending parallel to the row of inflow interfaces (14) form an inflow channel (27) coupled to said inflow interfaces (14); the opposite support (19a) of the battery module (11) extending parallel to the row of return connections forms a return channel connected to the return connections (14).

5. Traction battery according to one of claims 1 to 4, characterized in that the bottom wall (20) of the respective module housing (14) has an upper plate and a lower plate, wherein the upper plate (20a) and the lower plate (20b) bear against each other and are connected to each other on a first section, and wherein the upper plate (20a) and the lower plate (20b) are spaced apart from each other on a second section and form a cooling channel (25).

6. Traction battery according to one of claims 1 to 5, characterized in that an elastically deformable element (15) is positioned between the bottom wall (20) of the battery module (18) and the underbody protection plate (13).

7. The traction battery of claim 6,

the first section (15a) of the respective elastically deformable element (15) is connected to the bottom wall (20) of at least one battery module (18) and/or to at least one support (19a) of the battery frame (11),

the second section (15b) of the respective elastically deformable element (15) bears loosely against the underbody protection panel (13).

8. Traction battery according to one of claims 1 to 7,

the side walls (21a, 21b) of the respective module housings (14) are screwed to each other,

the bottom wall (20) of the respective module housing (14) is screwed to the side walls (21a, 21b) of the respective module housing (14),

the bottom wall (20) and the side walls (21b) of the respective module housing (14) are screwed to the support (19a) of the cell frame (11),

the cover plate (12) is screwed with the battery frame (11),

the vehicle bottom protection plate (13) is screwed with the battery frame (11).

9. Traction battery according to claims 7 and 8, characterized in that the respective elastically deformable element (15) is screwed on its first section (15a) with the bottom wall (20) of the respective battery module and/or with the respective support (19a) of the battery frame (11).

10. A traction battery for a motor vehicle, the traction battery comprising:

a battery frame (11) for supporting the battery,

a plurality of battery modules (18) which are accommodated in the battery frame (11) and each of which is composed of a plurality of battery cells (17) accommodated in a module case (14),

a vehicle bottom protection plate (13) connected with the battery frame (11),

an elastically deformable element (15) positioned between the module housing (14) of the battery modules and the underbody protection plate (13).

11. The traction battery of claim 10,

the first section (15a) of the respective elastically deformable element (15) is connected to the module housing (14) of at least one battery module (18) and/or to the battery frame (11),

the second section (15b) of the respective elastically deformable element (15) bears loosely against the underbody protection panel (13).

12. Traction battery according to claim 10 or 11, characterized in that it is modified according to one of claims 1 to 9.

Technical Field

The invention relates to a traction battery for a motor vehicle.

Background

A battery housing for a traction battery of a motor vehicle is known from DE 102015224777 a 1. The battery case has a case lower portion with a case bottom and a peripheral wall rising from the case bottom. The reinforcing struts extend in the interior space of the housing. These reinforcing struts together with the housing side walls delimit module receptacles into which the battery modules can be inserted. The case cover of the battery case is connected to the case lower portion at the upper side.

The traction batteries known from the prior art have a relatively complex construction, wherein cooling of the battery modules is difficult and furthermore the traction batteries are not sufficiently protected from damage when driving over obstacles.

Disclosure of Invention

The object of the invention is to provide a new traction battery for a motor vehicle which is of relatively simple construction, allows reliable cooling of the battery module, and is protected against damage when driving over obstacles.

This object is achieved by a traction battery for a motor vehicle according to the following.

The traction battery according to the invention comprises a battery frame assembled or assembled from support members. The support is assembled circumferentially and preferably only from two longitudinal supports and two transverse supports.

The traction battery according to the invention also comprises a plurality of battery modules, each consisting of a plurality of battery cells, which are accommodated in a battery frame, wherein the respective module housing is assembled or assembled from a plurality of side walls and a bottom wall, and wherein the bottom wall of the respective module housing is formed as a cooling plate for cooling the battery cells of the respective battery module.

Furthermore, the traction battery according to the invention comprises a cover plate connected to the battery frame and a underbody protection plate connected to the battery frame.

The traction battery according to the invention therefore comprises a battery frame, preferably assembled or assembled from four supports. The supports of the battery frame are preferably welded to each other. The battery modules are accommodated in the frame. Each battery module has a respective module housing which, like the cell frame, is also assembled from a plurality of components, namely from a bottom wall and preferably from four side walls. The bottom wall and the side walls of the respective module housing are preferably screwed to one another. The module housings are connected, preferably screwed, to the cell frame. The bottom wall of the respective module case serves as a cooling plate for cooling the battery cells of the respective battery module. The cover plate and the underbody protection plate are connected, preferably screwed, to the battery frame. The traction battery according to the invention has a simple construction, allows an advantageous cooling of the battery unit and is protected against damage when driving over obstacles.

According to an advantageous further development of the invention, the bottom wall of the respective module housing projects on two opposite narrow sides relative to the side walls of the respective module housing and there has a flow inlet on a first side and a return connection for the coolant on an opposite second side. The bottom wall of the respective module housing can be effectively supplied with coolant from the narrow side when the traction battery is simply constructed, and the coolant can then be simply conducted out of the bottom wall at the opposite narrow side of the respective module housing. The battery cells of the respective battery module, which are located on the bottom wall of the respective module housing, can be cooled efficiently when the traction battery is constructed in a simple manner.

According to an advantageous development of the invention, the battery modules are accommodated in the battery frame in such a way that the narrow sides of the module housings of the battery modules are arranged in rows and thus the inlet connections and the return connections are each arranged in columns, wherein the supports of the battery frame, which extend parallel to the columns of inlet connections, form inlet channels which are coupled to the inlet connections; while the opposing supports of the battery module, which extend parallel to the row of return connections, form return channels which are coupled to the return connections. The inlet and return connections formed on the bottom wall of the respective module housing of the respective battery module can be simply introduced into the cooling circuit via the inlet and return channels (provided by the battery frame, respectively).

According to an advantageous development, an elastically deformable element is positioned between the bottom wall of the battery module and the underbody protection plate. Preferably, the first section of the respective elastically deformable element is connected to the bottom wall of the at least one battery module and/or to the at least one support of the battery frame. The second section of the respective elastically deformable element bears loosely against the underbody protection plate. The use of these elastically deformable elements makes it possible to protect the traction battery particularly effectively against damage when driving over obstacles. The elastically deformable elements dampen the movement of the underbody protection plate relative to the bottom wall of the module housing of the battery modules. Although these elastically deformable elements are particularly preferably used with the other details of the invention described above, their use is not limited thereto. These elastically deformable elements can also be used in differently configured cell frames and cell modules. The corresponding traction battery is defined in the following description 10.

In general, the present invention herein discloses the following embodiments 1 and 10, and the following embodiments 2 to 9 and 11 to 12 are preferred embodiments:

1. traction battery (10) of a motor vehicle, having:

a battery frame (11) assembled or assembled from supports (19, 19a, 19b),

a plurality of battery modules (18) which are accommodated in the battery frame (11), each of which is composed of a plurality of battery cells (17) which are accommodated in a module housing (14) of the respective battery module (18),

wherein the respective module housing (14) is assembled or assembled from a plurality of side walls (21, 21a, 21b) and a bottom wall (20),

wherein the bottom wall (20) of the respective module housing (14) is formed as a cooling plate for cooling the battery cells (17),

a cover plate (12) connected with the battery frame (11), and

a vehicle bottom protection plate (13) which is connected with the battery frame (11).

2. Traction battery according to the above 1, characterized in that the bottom wall (20) of the respective module housing (14) protrudes on two opposite narrow sides with respect to the side wall (21b) of the respective module housing (14) and has a flow inlet connection (24) on a first side in the protruding position and a return connection for the coolant on an opposite second side.

3. Traction battery according to the above 2, characterised in that the battery modules (18) are accommodated in the battery frame (11) such that the narrow sides of the module housings (14) of the battery modules (18) are in a row and thus the inlet and return connections (24, respectively) are in a row.

4. Traction battery according to the above 3, characterised in that the supports (19a) of the battery frame (11) extending parallel to the row of inflow interfaces (14) form an inflow channel (27) coupled to said inflow interfaces (14); the opposite support (19a) of the battery module (11) extending parallel to the row of return connections forms a return channel connected to the return connections (14).

5. Traction battery according to one of the above claims 1 to 4, characterized in that the bottom wall (20) of the respective module housing (14) has an upper plate and a lower plate, wherein the upper plate (20a) and the lower plate (20b) bear against each other and are connected to each other on a first section, and wherein the upper plate (20a) and the lower plate (20b) are spaced apart from each other on a second section and form a cooling channel (25).

6. Traction battery according to one of the above claims 1 to 5, characterized in that an elastically deformable element (15) is positioned between the bottom wall (20) of the battery module (18) and the underbody protection plate (13).

7. The traction battery according to claim 6, wherein,

the first section (15a) of the respective elastically deformable element (15) is connected to the bottom wall (20) of at least one battery module (18) and/or to at least one support (19a) of the battery frame (11),

the second section (15b) of the respective elastically deformable element (15) bears loosely against the underbody protection panel (13).

8. Traction battery according to one of the above-mentioned items 1 to 7,

the side walls (21a, 21b) of the respective module housings (14) are screwed to each other,

the bottom wall (20) of the respective module housing (14) is screwed to the side walls (21a, 21b) of the respective module housing (14),

the bottom wall (20) and the side walls (21b) of the respective module housing (14) are screwed to the support (19a) of the cell frame (11),

the cover plate (12) is screwed with the battery frame (11),

the vehicle bottom protection plate (13) is screwed with the battery frame (11).

9. Traction battery according to the above 7 and 8, characterized in that the respective elastically deformable element (15) is screwed on its first section (15a) with the bottom wall (20) of the respective battery module and/or with the respective support (19a) of the battery frame (11).

10. A traction battery for a motor vehicle, the traction battery comprising:

a battery frame (11) for supporting the battery,

a plurality of battery modules (18) which are accommodated in the battery frame (11) and each of which is composed of a plurality of battery cells (17) accommodated in a module case (14),

a vehicle bottom protection plate (13) connected with the battery frame (11),

an elastically deformable element (15) positioned between the module housing (14) of the battery modules and the underbody protection plate (13).

11. The traction battery according to claim 10, wherein,

the first section (15a) of the respective elastically deformable element (15) is connected to the module housing (14) of at least one battery module (18) and/or to the battery frame (11),

the second section (15b) of the respective elastically deformable element (15) bears loosely against the underbody protection panel (13).

12. Traction battery according to the above 10 or 11, characterised in that it is modified according to one of the above 1 to 9.

Drawings

Preferred developments of the invention result from the above-mentioned descriptions 2 to 9 and 11 to 12 and the following description. Embodiments of the invention will be described in detail with the aid of the accompanying drawings, without being restricted thereto. In the drawings:

fig. 1 shows an exploded illustration of a traction battery according to the invention without a battery unit;

fig. 2 shows the battery frame of the traction battery in a separate illustration;

fig. 3 shows the battery module of the traction battery in a separate illustration;

fig. 4 illustrates a battery cell of the battery module of fig. 3;

fig. 5 illustrates a module case of the battery module of fig. 3;

fig. 6 shows a partial view of the traction battery;

fig. 7 shows another partial view of the traction battery;

fig. 8 shows another partial view of the traction battery;

fig. 9 shows another partial view of the traction battery;

fig. 10 shows another partial view of the traction battery; and is

Fig. 11 shows another partial view of the traction battery.

Detailed Description

Fig. 1 shows an exploded view of selected components of a traction battery 10 according to the present invention. Thus, fig. 1 shows: a battery frame 11, a cover plate 12 which can be connected to the battery frame 11, a underbody protection plate 13 which can also be connected to the battery frame 11, a module housing 14 of the battery modules which are to be arranged in the battery frame 11, and elastically deformable elements 15 which are arranged in the assembled state of the traction battery 10 between the battery modules (i.e. the module housings 14 of the battery modules) and the underbody protection plate 13. Fig. 1 shows a total of eight module housings 14 and eight elastically deformable elements 15 for a respective eight battery modules. However, this number is purely exemplary.

Fig. 1 shows only the module housing 14 of the battery module. Fig. 5 also shows the module housing 14, but in more detail than in fig. 1. Fig. 4 shows a cell 16 made up of a plurality of battery cells 17 of a battery module that can be positioned in a module housing 14. Fig. 3 shows a complex battery module 18 which is composed of a module housing 14 and of a cell 16 with a plurality of battery cells 17. The battery cells 17 of the battery module 18 are connected in parallel and/or series with each other according to a desired capacity.

The battery frame 11 of the traction battery 10 according to the invention is assembled or assembled from the supports 19, more precisely from two longitudinal supports 19a and two transverse supports 19 b. The two longitudinal supports 19a of the battery frame 11 extend parallel to one another at a distance, wherein the two transverse supports 19b of the battery frame 11 extend perpendicularly to the two longitudinal supports 19a between the ends of the two longitudinal supports 19a and are connected (preferably by welding) to the longitudinal supports 19a at the ends adjoining one another. Thus forming a circumferential cell frame 11. The battery frame 11 is composed of only these supports 19a, 19 b. The support 19 is preferably hollow and reinforced by a frame-like structure (see fig. 8).

The welding of the support 19a of the battery frame 11 with the support 19b of the battery frame 11 is preferably used for sealing the battery frame 11 of the traction battery according to the invention by means of corresponding welding seams between the supports 19a, 19b of the battery frame 11.

Each module housing 14 of a respective battery module 18 has a bottom wall 20 and a plurality of side walls 21. The module housing 14 is also embodied as a constructed component, like the cell frame 11, so that the side walls 21 are assembled together with the bottom wall and are thus assembled into a component. It is therefore possible to screw or weld the side walls 21 of the respective module housing 14 to the respective bottom wall 20. The ends of the side walls 21 that abut each other are preferably screwed to each other. The side wall 21 is preferably made of a solid material to improve stability.

From fig. 5 it can be seen that: the two opposing first side walls 21a of the respective module housing 14 of the respective battery module 18 form the long sides of the respective module housing 14 and the two opposing second side walls 21b form the narrow sides of the respective module housing 14. According to fig. 7, the side wall 21b is screwed to the side wall 21 a.

In the embodiment shown in fig. 5, the interior space of the respective module housing 14, which is defined by the side walls 21, is divided into a plurality of subspaces by intermediate walls 30. The intermediate wall 30 extends parallel to the narrow-sided side wall 21b of the respective module housing 14. In the embodiment shown, the unit 16 made up of battery cells 17 is divided into two sub-units 16a, 16b each made up of a plurality of battery cells 17. The two subunits 16a, 16b are arranged in a subspace of the module housing and are separated from each other by an intermediate wall 30. The two subunits 16a, 16b are electrically isolated, preferably galvanically isolated. In the subspace defined between these two intermediate walls 30, a not shown battery cell controller is preferably arranged.

The side walls 21a, 21b and the intermediate wall 30 serve, in particular, to receive a so-called expansion force as a force caused by a change in volume of the battery module 18. Such a volume change can be created when charging and discharging the battery module 18.

Fig. 7 shows the side walls 21a, 21b of the module housing 14 of the battery module 18 connected by screws 22.

Fig. 7 also shows screws 23 by means of which the respective longitudinal supports 19a can be fastened to the module housing 14 of the battery module 18, i.e. to the narrow-sided side walls 21b of the module housing 14 of the battery module 18. See also fig. 8.

As can best be appreciated from fig. 5, 6 and 7: the bottom wall 20 of the respective module housing 14 projects on the opposite narrow side of the respective module housing 14 relative to the side wall 21b of the module housing 14 that delimits the narrow side, wherein the inlet connection 24 is formed on the first narrow side and a return connection for the coolant, which is not visible in the drawing, is formed on the opposite narrow side.

The bottom wall 20 of the respective module housing 14 is thus formed as a cooling plate for cooling the battery cells 17, wherein the bottom wall 20 can be supplied with coolant via the respective inlet connection 24, and wherein the coolant can be discharged from the respective bottom wall 20 via the respective return connection (not shown).

Fig. 10 and 11 show a view of the traction battery 10 according to the invention from below, i.e. a view of the bottom wall 20 of the module housing 14 of the battery module 18 from below. Here, as can be seen from fig. 10 and 11: the bottom wall 20 of the respective module housing 14, which serves as a cooling plate, has or forms a cooling channel 25 for a coolant, which extends from the inlet connection 24 in the direction of the return connection 25, i.e. from a first narrow side of the respective module housing 14 in the direction of an opposite second narrow side.

Fig. 7, 10 and 11 show connection screws 26 by means of which the bottom wall 20 of the module housing 14 can be mounted on sections of the cell frame 11 with which they project on narrow sides relative to the respective side walls 21b of the module housing 14, more precisely on the longitudinal supports 19a of the cell frame 11.

As already mentioned above, the bottom wall 20 of the module housing 14 is formed as a cooling plate, wherein the bottom wall of the module housing has an inlet connection 24 and a return connection in the region of the narrow sides in order to supply the respective bottom wall 20 with coolant on the one hand and to discharge the coolant from the bottom wall on the other hand. Each battery module 18 is independently cooled by its bottom wall 20.

As can be gathered in particular from fig. 1, the battery modules 18 or the module housings 14 of these battery modules are accommodated in the battery frame 11 in such a way that the narrow sides or the side walls 21b of the module housings 14 of the battery modules 18 which delimit the narrow sides are aligned in rows, so that the inlet connections 24 are arranged on a first narrow side and the return connections are arranged on the opposite narrow side. Here, the inlet channels 27 and the return channels, not shown in the figures, are then provided by longitudinal supports 19a extending parallel to the row of inlet connections 24 and parallel to the row of return connections. Fig. 8 therefore shows an inlet channel 24 for the coolant, which is formed from the longitudinal supports 19a of the battery frame 11 visible there, via which inlet channel inlet connection 24 the coolant can be supplied to the bottom wall 20 of the module housing 14.

From fig. 9, it can be seen that: the bottom wall 20 of the respective module housing 14 has an upper plate 20a and a lower plate 20 b. The upper plate 20a and the lower plate 20b bear against one another at the first section and are connected to one another there. In the second section, the upper plate 20a and the lower plate 20b are spaced apart from one another and define a cooling channel 25 through which coolant can be guided starting from the inflow connection 24 in the direction of the return connection.

As already mentioned above, the side walls 21a, 21b of each module housing 14 of each battery module 18 are connected to one another, preferably screwed to one another. These screws 22 are visible in fig. 7.

Likewise, the bottom wall 20 of the respective module housing 14 is connected to the side walls 21a, 21b, preferably screwed thereto. In addition, the bottom wall 20 of the respective module housing 14 is screwed to the support 19a of the battery frame 11 by means of screws 26.

The cell frame support 19a is also screwed to the side wall 21b of the module housing 14 by means of screws 23.

The cover plate 12 is also screwed to the battery frame 11, as is the underbody protection plate 13.

An elastically deformable element 15 is arranged between the bottom wall 20 of the module housing 14 of the battery module 18 and the underbody protection plate 13. Fig. 6, 7 and 10 show the installation position of these elastically deformable elements 15.

As already explained, the battery modules 18 are accommodated in the battery frame 11 in such a way that the narrow sides or the side walls 21b of the module housing 14 which delimit the narrow sides are arranged in rows. Accordingly, the side walls 21a of the module case 14, which define the long sides of the module case 14, extend parallel to each other, with the side walls 21a of adjacent battery modules 18 or adjacent module cases 14 abutting each other. The elastically deformable element 15 extends in the direction of the side walls 21a of the module housing and thus in the direction of the long sides of the module housing 14, wherein the elastically deformable element 15 extends over the entire longitudinal extension of the module housing 14.

Each (preferably trapezoidally configured) elastically deformable element 15 has a first section 15a, at which two adjacent battery modules or two adjacent module housings 14 bear directly against the side walls 21a adjoining one another, wherein the elastic elements 15 are connected in the region of this first section 15a by means of first screws 28 to the bottom wall 20 of the respective module housing 14 or to the side walls 21a of the respective module housing 14, and wherein second screws 29 serve to fasten the elastically deformable elements 15 to the battery frame 11 (i.e. to the supports 19a of the battery frame 11) by means of their respective first section 15 a. The elastically deformable element 15 rests loosely with the second section 15b on the underbody protection plate 13. Thus, when the motor vehicle with the traction battery 10 drives over an obstacle and this obstacle touches the underbody protection plate 13, the underbody protection plate 13 moves upwards, wherein the elastically deformable element 15 dampens this upward movement of the underbody protection plate 13 in the direction of the battery module 18 and thus prevents the module housing 14 of the battery module 18 from being damaged. The sections 15a, 15b of the respective elastically deformable element 15 extend over the entire longitudinal extent of the module housing 14.