CN106410316A - Battery pack and vehicle having such a battery pack - Google Patents

Abstract

In particular, the invention proposes a battery pack (3) with a battery housing (4) and a bottom-formed battery holder (5), to which two or more battery modules (9) are fastened and are electrically connected to each other, wherein at least one heat exchanger (12) is arranged between two adjacent battery cell modules (9), the heat exchanger is connected by means of at least one inflow connection stub and at least one return flow The joint stubs (20, 21) of the part are fluid-tightly connected or connectable to the assigned receiving elements (24, 25) of the fluid circuit of the fluid circuit inside the battery housing (4), and wherein the The coupling stubs (20, 21) together with the receiving elements (24, 25) form a detachable quick coupling.

Description

Battery pack and vehicle with such a battery pack

technical field

The invention relates to a battery pack according to the combination of the features of claim 1 of the invention. Furthermore, the invention according to claim 12 also relates to a vehicle, in particular a hybrid vehicle or an electric vehicle, which has such a battery arrangement.

Background technique

Hybrid or electric vehicles are operated by means of rechargeable electrical energy stores, also known as traction batteries. During recharging of the accumulator, especially during rapid charging, high power losses occur which can lead to a high thermal load on the accumulator. To cope with this situation, temperature regulation of the traction battery is required, for example by means of a cooling device. In this respect, DE 10 2010 007 975 B4 proposes a charging station for an electrical energy store of a motor vehicle, which has a cooling device with at least one cooling line connectable to the motor vehicle , for supplying coolant to the traction battery. In this case, the traction battery is to have a cooling module with at least one cooling channel, wherein during the charging process the coolant supplied by means of the cooling lines of the charging station is to be conducted through the cooling channel of the traction battery. The connection of the cooling line of the cooling device of the charging station to the vehicle-side connection of the cooling module for the traction battery takes place via a connection.

Furthermore, it is known that the service life of the traction battery is reduced when the operating temperature exceeds 40° C., and that its efficiency drops below −10° C. Furthermore, the temperature difference between the individual battery cells must also not exceed 5°C. In order to ensure that the boundary conditions are known, the traction battery is connected to a vehicle-side cooling system. In this case, the battery-side cooling module is integrated into the low-temperature cooling circuit of the motor vehicle, wherein the thermal management ensures that the ideal operating temperature range is maintained. Such an ideal operating temperature range is, for example, 20°C to 30°C. Furthermore, the temperature controller regulates the temperature of the battery system in the stated temperature range during all operating states of the battery system, in particular also during driving of the motor vehicle. A cooling module is known from DE 10 2008 059 969 A1, which is designed as a heat exchanger in the form of a plate and is connected thermally conductively to the individual cells of the battery inside the battery housing. Starting from the heat exchanger, the coolant line section leads into an area outside the battery housing and is connected there fluid-tightly to the air conditioning unit of the vehicle via a detachable coupling element. The document is silent on how the direct connection between the coolant line section and the heat exchanger is realized. However, it is known on the basis of clear prior use (offenkundige Vorbenutzung) that the cooling lines are fastened in a fluid-tight manner to the connection stubs of the heat exchanger by means of manually fitted pipe clips. These measures are expensive, since a tool must be provided for this, which also requires a correspondingly large free space for handling. In addition, in the event of possible incorrect assembly and the resulting introduction of clips into the battery system, the battery system has to be disassembled since this creates an electrical potential hazard.

Contents of the invention

It is therefore the object of the present invention to provide a battery pack which can be produced in a simple and cost-effective manner and which in particular allows a comfortable manual assembly of the fluid lines on the heat exchanger of the battery pack inside the battery housing . Furthermore, the object of the present invention is to provide a vehicle, in particular a hybrid or electric vehicle, which has a battery assembly of the aforementioned type.

The proposed object is solved by a battery assembly having a battery housing with a bottom-formed battery holder, on which two or more battery modules are fastened and electrically connected to one another, wherein at the two At least one heat exchanger is arranged between two adjacent battery modules, the heat exchanger is connected to the fluid line of the fluid circulation inside the battery housing by means of at least one inflow connection stub and at least one return connection stub The assigned receiving element is connected or connectable in a fluid-tight manner, and the coupling stub together with the receiving element forms a detachable quick coupling.

According to the invention, a quick connector is to be understood as meaning a fluid-tight connection between two tubular ends of a fluid line, which is achieved solely by axial, in particular manual, insertion of the ends. Further manual joining measures, for example by means of mechanical fastening elements which in particular require tools, are therefore unnecessary. This measure advantageously simplifies the fluid-tight attachment of the fluid lines to the heat exchanger inside the battery housing. Furthermore, savings are achieved in particular in terms of manufacturing time and material.

The dependent claims describe preferred refinements or configurations of the invention.

According to an especially practical embodiment of the invention, the connection stubs are each of tubular design and are inserted or can be inserted into the tubular receiving element of the associated fluid line and are positively connected to one another or can be connected to each other. connect.

In order to achieve the positive fit, the corresponding connecting tube is preferably formed here with a circumferential detent element pointing radially outwards from the outer side of the connecting tube, which is assigned to the corresponding detent element. The latching counterpart of the receiving element and directed radially inwards.

Furthermore, preferably, the presently preferably surrounding detent element is formed in one piece with the connection stub, so that material and production time are saved.

According to a particularly simple and functionally reliable embodiment of the latching counterpart, which is formed by a clamping part, which can be fastened to the base part of the receiving element and which, in the assembled state, at least partially Surrounding (umgreifend) the connecting tube, the clamping part comprises a spring-elastically configured arcuate base body, which passes through a central arcuate section and at each end one abuts on the central arcuate section. The bracket legs are formed, wherein one of the aforementioned snap-in counterparts is formed on the free end of each bracket leg.

The detent counterparts are preferably arranged pincer-like opposite each other and point towards each other. In the assembled state of the clamping part with the base part of the receiving element and the joint stub, the snap-in counterpart penetrates through a corresponding opening in the wall of the base part of the receiving element and thus secures the joint stub in the axial direction. fixed on the receiving element.

The bow-shaped base body of the clamping part is preferably displaceably guided transversely to the longitudinal direction of the receiving element in the guide groove of the base part, ie from the first operating position "I" to the second operating position. In "II", the first operating state corresponds to the base state, and in this first operating state the central arcuate section of the arcuate base body is arranged radially spaced apart from the outer contour of the base part of the receiving element and The detent counterpart is in a detented position relative to the detent element, in the second operating position, the central arcuate section of the arcuate base is arranged against or close to the outer contour of the base part of the receiving element . This has the advantage of easy accessibility and manual actuation of the clamping part for the possible need to release the form-fit. For this purpose, two arch legs each form a ramp, which abut against the central arch section of the arch-shaped base body and carry the detent counterpart. In this case, the ramp is supported on the base part of the receiving element in such a way that due to the movement of the clamping part from its first operating position "I" into its second operating position "II", the latching counterpart is radially They are moved away from each other and the latching of the latching counterpart with the latching element of the connection stub is released.

As further provided by the invention, the connection stubs are preferably arranged at an angle "α" pointing away from the battery holder, so that in particular the respective fluid lines to the heat exchanger can be connected with a minimum installation space requirement. Manual connections on the dispensed nipples are simplified. It has been shown to be particularly advantageous if the angle "α" is selected from the range of 10° to 30°. Said angle "α" is preferably about 15°.

As regards the at least one heat exchanger, the heat exchanger is preferably configured in the form of a plate, so that the heat exchanger advantageously has a large surface area in contact with two adjacent, respectively plate-shaped contact surfaces. on the battery cell module.

The invention also relates to a vehicle, in particular a hybrid or electric vehicle, having a battery assembly of the aforementioned type.

Description of drawings

The invention is explained in more detail below with reference to exemplary embodiments shown schematically in the drawings. However, the invention is not limited to the exemplary embodiments described, but includes all configurations defined by the claims. The accompanying drawings show:

FIG. 1 shows very schematically a motor vehicle equipped with a battery pack constructed according to the invention,

FIG. 2 shows the battery assembly described in a perspective view,

Figure 3 shows an exploded perspective view of an assembly unit consisting of two battery cell modules and a heat exchanger,

Figure 4 shows the assembly unit according to Figure 3 in assembly,

Figure 5 shows a detail part "Z" according to Figure 2,

Figure 6 shows a cross-sectional view of the quick coupling between the heat exchanger and the fluid line, corresponding to the section line "A-A" according to Figure 5,

Fig. 7 shows a detail part "Y" according to Fig. 6,

FIG. 8 shows the quick coupling according to FIGS. 6 and 7 in a three-dimensional, single-part view, with a coupling stub arranged on the heat exchanger side and a receiving element for the coupling stub arranged on the fluid line side,

Figure 9 shows a perspective individual view of the base part of the receiving element,

Figure 10 shows a perspective individual view of the clamping part of the receiving element,

FIG. 11 shows a view on the end side of the receiving element according to FIG. 9 with a view of the clamping part in a first operating position or basic position, and

FIG. 12 shows a view on the end side of the receiving element according to FIG. 9 with a view of the clamping part in a second operating state.

detailed description

FIG. 1 firstly shows a vehicle 1 , here a motor vehicle, with an electric motor 2 as drive motor and with a battery pack 3 in the form of a traction battery. According to the exemplary embodiment, therefore, it is a purely electrically operated motor vehicle 1 . Naturally, the invention also includes a so-called hybrid vehicle which, in addition to one or more electric motors 2 , also has an internal combustion engine (not shown in the drawing).

According to FIG. 2 , the battery pack 3 has a battery housing 4 with a bottom-formed battery holder 5 , which is here pot-shaped with a holder bottom 5 a and an upwardly directed holder wall 5 b. This form of the battery holder 5 corresponds to the preferred form of the battery housing 4 with regard to waterproofing. Assigned to the battery holder 5 is a cover element 6 , shown only schematically, which is placed on the free end side 7 of the basin-shaped battery holder 5 and is connected by means of the hollow cylindrical centering pin shown in FIG. 2 . 8 and are screwed together by means of screws not shown in the drawing that pass through the centering pin 8 . An annular seal (not shown in the drawing) is preferably provided for sealing the joining point. Furthermore preferably, the battery holder 5 is at least a cast part made of aluminum or an aluminum alloy, for example.

However, the invention is not restricted to the described preferably basin-shaped battery holder 5 , but also includes a substantially plate-shaped battery holder 5 and therefore does not have the mentioned holder wall 5 b (not shown in the drawing) .

The battery holder 5 is here equipped with eight battery cell modules 9 which are electrically coupled to one another, wherein every four battery cell modules 9 form a module group 10a, 10b, and each module group 10a, 10b Consists of two assembly units 11 . According to FIGS. 2 to 4 , each assembly unit 11 consists of two, only shown by way of example, rectangular parallelepiped-shaped battery cell modules 9 , between which a plate-shaped heat exchanger is arranged. The heat exchanger 12 is preferably made of aluminum or an aluminum alloy. The two battery cell modules 9 of each assembly unit 11 together with the heat exchanger 12 are non-positively locked together with the first and second module holders 13 , 14 by means of non-illustrated screw connections. The first and second module holders are arranged on the end faces of the two battery cell modules 9 by way of fastening on the battery holder 5 or on the holder base 5 a of the battery holder.

According to the present embodiment, the first and second module supports 13 , 14 have a substantially X-shaped configuration ( FIGS. 3 and 4 ) and are each preferably formed by substantially planar sheet metal bent and/or stamped parts. The free legs 15 of the X-shaped module carriers 13 , 14 are bent at 90° toward the respective battery cell module 9 and each have a fastening hole 16 . The two battery cell modules 9 are connected by means of the fastening holes 16 of the adjacent module holders 13 , 14 visible in FIG. The fastening screws 17 in the holes are connected to each other (Fig. 4). In this case, the fastening screw 17 is axially supported at one end by means of its screw head 18 on the free foot 15 of the first module carrier 13 and at the other end by means of a nut 19 on the second module On the free leg 15 of support 14. Said nuts 19 , as so-called weld nuts, are preferably connected materially to the associated foot 15 of the second module carrier 14 by welding.

In particular, as can be seen from FIG. 3 , the heat exchanger 12 has two connection stubs 20 , 21 which allow the heat exchanger 12 to be attached to a vehicle 1 known and therefore not shown in the drawing. fluid circulation, especially in vehicle cooling circuits. Said cooling cycle is preferably a low-temperature cooling cycle. The fluid circuit is correspondingly a cooling circuit through which a cooling medium, for example water and ethylene glycol, flows. The connection stub 20 is integrated or can be integrated into the so-called inflow of the cooling circuit, and the further connection stub 21 is integrated or can be integrated into the so-called return of the cooling circuit. In this regard, FIG. 2 shows the battery holder 5 together with the battery modules 9 while the battery holder 5 is equipped with line sections 22 a , 22 b ; 23 a , 23 b of the fluid lines of the inflow and return of the cooling circuit. . Two line sections 22 a , 22 b ; 23 a , 23 b are provided for the current four heat exchangers 12 of the battery pack 3 , each having two receiving elements 24 , both for the inflow and for the return flow. , 25 for the fluid-tight connection of the line section within the battery housing 4 with the correspondingly assigned connection stub 20 or 21 . The receiving elements 24 , 25 are produced as separate components and are preassembled on the respective line sections 22 a , 22 b ; 23 a , 23 b.

In particular, as can be seen from FIG. 6 , the connection stubs 20 , 21 are directed away from the battery holder 5 at an angle “α”, that is to say pointing upwards towards the cover element 6 , so that the fluid lines of the inflow and return sections of the cooling circuit The attachment of the corresponding receiving elements 24, 25 of said line sections 22a, 22b; 23a, 23b of the pipeline is simplified. An angle “α” of 10° to 30°, however preferably an angle “α” of approximately 15° has proven to be advantageous in experiments.

The line sections 22 a , 23 a of the inflow and the line sections 22 b , 23 b of the return flow each converge at the other end and can be connected by means of coupling elements 26 , 27 in each case to the non-illustrated parts of the cooling circuit. connector on the short line. It can thus be seen that the two coupling elements 26 , 27 are guided outwards through the support base 5 a of the battery support 5 , so that the connection and release of the connections is also possible with the closed battery housing 4 (not shown in the drawing). show).

According to FIGS. 5 to 12 , the respective assigned receiving elements 24 , 25 of the respective connection stubs 20 , 21 of each heat exchanger 12 and of the line sections 22 a , 22 b ; 23 a , 23 b of the fluid lines are detachably configured. Take off the quick connector. As already explained above, according to this exemplary embodiment a quick coupling is understood to be a fluid-tight connection between two tubular ends of a fluid line, which fluid-tight connection is only achieved by axially plugging, Especially manual mating implementation. Further manual joining measures, for example by means of mechanical fastening elements which in particular require tools, are therefore unnecessary.

The connection stubs 20 , 21 are therefore now tubular in design and inserted into them by axial movement of the tubular receiving elements 24 , 25 according to the direction arrow 28 in FIG. 5 ( FIGS. 6 , 7 ). . The connection stubs 20 , 21 and the associated receiving elements 24 , 25 are connected to each other in a form-fitting and fluid-tight manner in the assembled state. The fluid-tightness described is achieved by at least one, here two, preferably elastomeric, annular seals 29 which are inserted into the receiving elements 24 , 25 and form a unit with them. In the assembled state of the joint stubs 20, 21 and the receiving elements 24, 25, the said annular seal 29 rests not only on the inner contour of the receiving elements 24, 25, but also on the outer surface of the joint stubs 20, 21. Contour or lateral surface (Fig. 6, 7).

In order to achieve the described positive fit, the connection stubs 20 , 21 have a circumferential detent element 30 , which points radially outwards from the outer side of the connection stubs, or in accordance with an annular collar Form integrally formed with the connection stubs 20 , 21 . The connection stubs 20 , 21 are preferably made of aluminum or an aluminum alloy and are thus designed in the same material as the heat exchanger 12 .

The latching element 30 corresponds to two latching counterparts 31 , 32 assigned to the receiving elements 24 , 25 and directed radially inward. The latching counterparts 31, 32 are here formed by a clamping part 33 which can be fastened to the base part 24a, 25a of the receiving element 24, 25 and which in the assembled state at least partially surrounds the connection stub 20, 21 (in particular See Figures 7-10). Both the base part 24 a , 25 a and the clamping part 33 are preferably produced from plastic, more preferably according to a plastic injection molding process.

According to FIG. 10 , the clamping part 33 comprises a spring-elastically configured arcuate base body 34 , which passes through a central arcuate section 34 a and at each end an arched leg 34 b adjoining the central arcuate section, 34c composition. A said detent counterpart 31 , 32 is formed on the free end of each bow leg 34 b , 34 c in each case, said detent counterparts being arranged opposite, so to speak, in a pincer-like manner and pointing toward one another.

In the assembled state of the clamping part 33 with the base part 24 a , 25 a of the receiving element 24 , 25 , the arcuate base body 34 of the clamping part 33 is guided displaceably in the guide groove 36 transversely to the longitudinal direction of the receiving element 24 , 25 , the guide groove is formed in the outer side of the wall 35 of the base part 24a, 25a. Here, the snap-in counterparts 31 , 32 pass through corresponding openings 37 , 38 in the wall 35 of the base part 24 a , 25 a ( FIGS. 8-10 ). According to the direction arrow 28 in FIG. 5 , if the receiving element 24 , 25 is inserted axially onto the connection stub 20 , 21 , the locking element 30 locks due to a suitable bevel formed on the locking element. The counterparts 31 , 32 together with the arch legs 34 b , 34 c radially face away from each other or spread apart said arch legs 34 b , 34 c and are then positioned behind the latch counterparts 31 , 32 , whereby the latch counterparts The portion then springs back and thus fixes the nipple 20 , 21 axially on the receiving element 24 , 25 . During the axial displacement of the receiving elements 24, 25 onto the joint stubs 20, 21, the annular seals 29 of the receiving elements 24, 25 simultaneously achieve a fluid-tight functional connection with the joint stubs 20, 21 (Figs. 6, 7) .

For the possible release of the form-lock between the latching element 30 and the latching counterpart 31 , 32 or between the joint stub 20 , 21 and the receiving element 24 , 25 , the arcuate shape of the clamping part 33 The base body 34 can be transferred from the first operating state "I" into the second operating state "II" ( FIGS. 6 , 7 , 11 ). The first operating state "I" corresponds to the basic state of the clamping part 33 in which the central arcuate section 34a of the arcuate base body 34 is radially aligned with the outer contours of the base parts 24a, 25a of the receiving elements 24, 25. They are arranged at a distance from each other, and in the manner described above, the latch counterparts 31 , 32 are in a latched state relative to the latch elements 30 of the connection stubs 20 , 21 .

Due to the preferably manual application of a force "F" to the joint stubs 20, 21 in the radial direction to the central arcuate section 34a (Fig. The basic state starts a transition into the second operating state “II”, in which the central arcuate section 34 a of the arcuate base body 34 touches or approaches the outer contour of the receiving element 24 , 25 . The two bow legs 34 b , 34 c , which adjoin the central bow section 34 a of the bow-shaped base body 34 and carry the detent counterparts 31 , 32 each form a ramp 39 , 40 (see especially FIG. 10 ). The ramps 39 , 40 are supported here on the base part 24 a , 25 a of the receiving element 24 , 25 or on at least one support bridge 41 formed inside the guide groove 36 of the base part 24 a , 25 a: due to the clamping As part 33 moves from its first operating position "I" into its second operating position "II", the locking counterparts 31, 32 move or spread apart in the radial direction away from each other and cause the locking The clamping and releasing of the mating part and the locking element 30 of the joint short tubes 20, 21 ( FIG. 12 ). Subsequently, the receiving elements 24 , 25 can be withdrawn axially from the connection stubs 20 , 21 against the direction arrow 28 shown in FIG. 6 .

List of reference signs

1 vehicle

2 electric motors

3 battery pack

4 Battery case

5 battery holder

5a Bottom of stand

5b bracket wall

6 cover element

7 End side (support wall 5b)

8 center pins

9 battery cell module

10a Module set

10b module set

11 Assembly unit

12 heat exchanger

13 First module bracket

14 Second module bracket

15 feet (module bracket 13, 14)

16 fastening holes

17 fastening screw

18 screw heads

19 nuts

20 Connector short pipe (inflow part)

21 Joint short pipe (return part)

22a Pipe section (inflow part)

22b Pipe section (return part)

23a Pipe section (inflow part)

23b Pipe section (return part)

24 receiving element

24a Fundamentals

25 receiving element

25a Fundamentals

26 Coupling elements

27 Coupling elements

28 direction arrows

29 Ring seal

30 Locking element

31 Lock mating part

32 Lock mating part

33 Clamping parts

34 substrate

34a Middle arcuate section

34b Bow Feet

34c Bow Feet

35 wall

36 guide groove

37 openings

38 openings

39 slopes

40 slopes

41 Support Bridge

"α" angle

"I" first working state (clamping part 33)

"II" second working state (clamping part 33)

"F" force

Claims (12)

1. Battery assembly (3), a battery support (5) with a battery housing (4) and a bottom, on which two or more battery cell modules (9) are fastened and are electrically coupled to each other, wherein at least one heat exchanger (12) is arranged between two adjacent battery cell modules (9), said heat exchanger being connected by means of at least one connection stub of the inflow part and at least one The connection stubs (20, 21) of the return flow are connected or connectable in a fluid-tight manner in the interior of the battery housing (4) to assigned receiving elements (24, 25) of the fluid lines of the fluid circuit, and wherein , the joint short tubes (20, 21) together with the receiving elements (24, 25) form a detachable quick joint. 2. The accumulator assembly (3) according to claim 1, characterized in that the connector stubs (20, 21) are each tubular in design and are inserted or insertable into tubular receiving ports of assigned fluid lines. In the elements (24, 25), and form-fittingly connected or connectable to each other. 3. The accumulator assembly (3) according to claim 2, characterized in that, in order to achieve the form-locking of the corresponding joint stubs (20, 21), a A radially outwardly directed circumferential detent element (30) is formed which corresponds to a detent counterpart (31) assigned to the receiving element (24, 25) and directed radially inwardly , 32). 4 . The battery pack ( 3 ) according to claim 3 , characterized in that the locking element ( 30 ) is formed in one piece with the connection stub ( 20 , 21 ). 5. The storage battery assembly (3) according to claim 3 or 4, characterized in that, the locking counterparts (31, 32) are formed by a clamping piece (33), and the clamping piece can be fixed on the On the base part (24a, 25a) of the receiving element (24, 25) and at least partially surrounds the joint stub (20, 21) in the assembled state, the clamping part (33) comprises a spring elastically configured A bow-shaped base body (34), which is formed by a central bow-shaped section (34a) and a bow-shaped leg (34b, 34c) adjoining said middle bow-shaped section at each end, wherein, One of the snap-in counterparts ( 31 , 32 ) is formed on the free end of each bow leg ( 34 b , 34 c ). 6 . The battery pack ( 3 ) according to claim 5 , characterized in that the snap-in partners ( 31 , 32 ) are arranged clamp-like opposite each other and point toward each other, and in the clamping part ( 33 ) penetrates through the base portion (24a, 25a) of the receiving element (24, 25) in the assembled state with the base portion (24a, 25a) of the receiving element (24, 25) and the joint stub (20, 21) ) in the wall (35) of the corresponding opening (37, 38) and the joint stub (20, 21) is axially fixed on the receiving element (24, 25). 7. The accumulator assembly (3) according to claim 5 or 6, characterized in that the arcuate base body (34) of the clamping part (33) is transverse to the longitudinal direction of the receiving element (24, 25) Guided in a guide groove (36) of said base part (24a, 25a) in a displaceable manner, that is to say from a first operating state "I" to a second operating state "II", said first operating state Corresponding to the basic state, and in the first working state, the middle arcuate section (34a) of the arcuate base body (34) is in contact with the outer part of the base part (24a, 25a) of the receiving element (24, 25). The contours are arranged radially spaced apart and the detent counterparts (31, 32) are in a detented state detented into the detent element (30), in the second operating position the arcuate The central arcuate section (34a) of the base body (34) is arranged against or close to the outer contour of the base part (24a, 25a) of the receiving element (24, 25). 8. The accumulator assembly (3) according to claim 7, characterized in that two arched legs (34b, 34c) form a slope (39, 40) respectively, said arched legs engage with said arched base ( 34) on the middle arcuate section (34a) and carries the snap-in counterparts (31, 32), wherein the ramps (39, 40) are thus supported on the base of the receiving elements (24, 25) (24a, 25a): due to the movement of the clamping member (33) from its first working state "I" into its second working state "II", the locking counterparts (31, 32) are in They are moved radially away from each other and release the latching of the latching counterparts with the latching elements (30) of the connection stubs (20, 21). 9. The battery assembly (3) according to any one of claims 1 to 8, characterized in that, the short connector tubes (20, 21) depart from the battery bracket (5) at an angle "α" Directly arranged. 10. The accumulator assembly (3) according to claim 9, characterized in that said angle "α" is selected from the range from 10° to 30°, preferably 15°. 11 . The battery assembly ( 3 ) according to claim 1 , characterized in that the at least one heat exchanger ( 12 ) is formed in the form of a plate. 12 . 12. Vehicle (1), in particular a hybrid or electric vehicle, having a battery assembly (3) according to any one of claims 1 to 11.