DE102014019072A1 - Motor vehicle battery - Google Patents

Abstract

The invention relates to a motor vehicle battery (30a-d) having at least one rectangular cuboid cell block (45a-d), the at least one narrow side (46a-d, 47a-d) and at least one long side (48a-d, 49a-d) and a A plurality of serially and / or parallel interconnected battery cells (10a-d), which along the narrow side (46a-d, 47a-d) and the long side (48a-d, 49a-d) are arranged one behind the other, and with a tempering device (33a-d), which is provided for heating and / or cooling of the cell block (45a-d), wherein at least one heat-conducting element (53a-d) connected to the tempering device (33a-d), the long side (48a-d) of the cell block (45a-d) at least to a large extent, is provided.

Description

The invention relates to a motor vehicle battery.

From the DE 10 2008 034 867 A1 is already a motor vehicle battery, with at least one rectangular cuboid cell block having at least one narrow side and at least one long side and a plurality of serially and / or parallel interconnected battery cells, which are arranged along the narrow side and the long side in a row, and with a tempering, the is provided for heating and / or cooling of the cell block, known, wherein the tempering is thermally contacted with Ableiterfahnen the battery cell.

The invention is in particular based on the object of achieving a temperature control of local heat esters on the cell block. It is achieved by an embodiment according to the invention according to claim 1. Further developments of the invention will become apparent from the dependent claims.

The invention relates to a motor vehicle battery having at least one rectangular cuboid block having at least one narrow side and at least one long side and a plurality of serially and / or parallel connected battery cells, which are arranged one behind the other along the narrow side and the long side, and with a Tempering device, which is provided for heating and / or cooling of the cell block.

It is proposed that the motor vehicle battery has at least one heat-conducting element connected to the tempering device, which at least largely covers the long side of the cell block. As a result, a temperature of the cells can be achieved. In this context, a "cell block" is understood to mean a unit having a plurality of battery cells connected in series and / or in parallel with one another and at least with elements for mechanically fixing the battery cells and with elements for electrical contacting and interconnection of the battery cells. In this context, a "rectangular cuboid cell block" is to be understood as meaning a cell block which has a basic shape of a cuboid with a rectangular base area. In this context, a "narrow side" is to be understood as meaning a side of the rectangular cuboid cell block which has a smaller surface area than a long side. In this context, it is to be understood that "the heat-conducting element covers the long side of the cell block at least to a large extent" that the heat-conducting element covers at least fifty percent of a surface of the long side of the cell block and is arranged so that all battery cells along the long side of the Covered heat conduction.

It is also proposed that the motor vehicle battery has an insulation element which is arranged between the heat-conducting element and the cell block. As a result, a risk of short circuit can be avoided by the heat conducting element. In this context, an "insulation element" is to be understood as meaning, in particular, an element which is arranged between two components and electrically insulates them from one another, wherein the insulation element preferably has a high thermal conductivity. The insulation element can be designed, for example, as an electrically insulating heat-conducting foil or as a potting compound made of an electrically insulating material.

Furthermore, it is proposed that the motor vehicle battery has an insulation element which is arranged between the tempering device and the heat-conducting element. As a result, a risk of short circuit can be avoided by the heat conducting element and the heat conducting element can be used as a current-carrying element and / or be connected directly to current-carrying elements.

Furthermore, it is proposed that the tempering device comprises at least one cooling plate, which rests on the narrow side of the cell block. As a result, a path to be bridged by the heat-conducting element can be kept short and an efficiency of the temperature control can be increased. In this context, a "cooling plate" is to be understood as meaning a substantially flat body through which a cooling medium flows. In principle, the tempering device can also comprise at least one heating element which rests on the narrow side of the cell block.

It is also proposed that the at least one heat-conducting element at least partially covers the narrow side. As a result, at least partial shielding of the narrow side can be achieved.

Furthermore, it is proposed that the motor vehicle battery has at least one further heat-conducting element, which is arranged symmetrically to the at least one heat-conducting element and covers at least a large part of a further long side of the cell block. As a result, a temperature control of the individual cells can be achieved with a high degree of uniformity.

Furthermore, it is proposed that the tempering device comprises at least one cooling plate and / or at least one heating unit which is outside a battery compartment is arranged. As a result, the battery compartment can be kept small and spaces for receiving the tempering can be exploited. In this context, a "battery compartment" is to be understood as meaning a space, in particular a space of a vehicle, in which the battery cells of the motor vehicle battery are installed and which is preferably surrounded by a battery housing.

It is also proposed that the motor vehicle battery has a fixing plate for stabilizing the cell block, which is embodied as a heat-conducting element. As a result, in addition to the temperature control of the battery cells, the mechanical fixing of the battery cells can be intensified.

Furthermore, it is proposed that the cell block has a cell frame with a reinforcing element, which is designed as a heat conducting element. As a result, it is possible to dispense with an additional component as a heat-conducting element. In this context, a "cell frame" is to be understood as meaning a frame of the cell block which mechanically fixes the battery cells.

Furthermore, it is proposed that the tempering device has a combined cooling and heating plate. Thereby, operation of the motor vehicle battery can be ensured within a wide range of outside temperatures. A "combined cooling and heating plate" should be understood in this context, a cooling plate, which can be traversed by a heated medium instead of a cooling medium and / or equipped with heating elements.

Further advantages will become apparent from the following description of the figures. In the figures, four embodiments of the invention are shown. The figures, the description of the figures and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Showing:

1 a schematic representation of a motor vehicle drive train with a motor vehicle battery according to the invention,

2 A first embodiment of the motor vehicle battery according to the invention in a view on a long side,

3 the motor vehicle battery according to the invention in a view of a cell block end,

4 the motor vehicle battery according to the invention in a view on a narrow side,

5 A second embodiment of the motor vehicle battery according to the invention in a view on a long side,

6 the second embodiment of the motor vehicle battery according to the invention in a view of a cell block end,

7 A third embodiment of the motor vehicle battery according to the invention in a view on a long side,

8th the third embodiment of the motor vehicle battery according to the invention in a view of a cell block end,

9 the third embodiment of the motor vehicle battery according to the invention in a view on a narrow side and

10 A fourth embodiment of the motor vehicle battery according to the invention in a sectional view through a battery cell.

The 1 to 4 schematically show a motor vehicle drive train with a motor vehicle battery 30a as well as a cell block 45a from battery cells 10a in detail. The motor vehicle drive train includes an internal combustion engine 42a and an electric motor 43a used to drive drive wheels 44a are provided. The motor vehicle battery 30a is in particular for the delivery of electrical power to the electric motor 43a and for receiving electrical power, which is the electric motor 43a generated in a generator mode provided. The motor vehicle battery 30a is designed as a high-voltage vehicle battery.

The motor vehicle battery 30a includes one or more cell blocks 45a , The cell blocks 45a comprise a plurality of battery cells 10a , The cell blocks 45a as well as the battery cells 10a in the cell blocks 45a are electrically connected in parallel and / or in series to provide a voltage and capacitance required for the automotive powertrain. The battery cells 10a each have a cell voltage in the low voltage range, which depends on a cell chemistry used. In an embodiment of the battery cells 10a as lithium-ion batteries, the cell voltage is 3.6 volts, for example. In principle, however, the cell voltage can also have other values. The motor vehicle has depending on the interconnection of the battery cells 10a an operating voltage, which may be in the low voltage range or in the high voltage range depending on a intended use. Is the motor vehicle battery 30a trained as a starter battery, For example, the operating voltage may be 12 volts. In particular, for use in a hybrid powertrain or electric powertrain, the motor vehicle battery 30a be provided for an operating voltage of 120 volts or more.

The motor vehicle battery 30a has a housing 31a on top of that, the battery cells 10a receives. Next comprises the motor vehicle battery 30a an electronics 32a , in particular for monitoring the battery cells 10a as well as for adjusting an electrical power to the battery cells 10a fed or the battery cells 10a is taken is provided. In addition, the motor vehicle battery includes 30a a tempering device 33a for the battery cells 10a and / or the electronics 32a which in particular for cooling and / or heating of the battery cells 10a is provided. The battery cells 10a , the Electronic 32a and the tempering device 33a are located in the common housing 31a ,

All battery cells 10a are designed analogously. In the following description and the drawings between the individual battery cells 10a To be able to distinguish, are the reference numerals of the individual battery cells 10a supplemented by a numbering marked with a dot, which merely distinguishes the battery cells 10a in the description and the drawings. Components of the individual battery cells 10a provided a distinction between the components of each battery cell 10a is helpful, with a point numbering of the respective battery cell 10a Mistake. Reference numerals without numbering always refer to all components which have the same reference number. A description of the individual battery cell 10a is for example on all battery cells 10.1a . 10.2a transferable. Regarding further, from the battery cells 10a various components, which are multiply analog formed, the reference numerals are also supplemented by a marked with a dot numbering, which serves only to distinguish the components in the description and the drawings.

For temperature control, the motor vehicle battery 30a the tempering device 33a on. The tempering device 33a includes a cooling plate 34a which is provided with channels for a fluid. The cooling plate 34a In an operation, an air-conditioning coolant or a cooling fluid flows through as cooling fluid. Between the battery cells 10a and the cooling plate 34a is an electrically insulating heat conducting foil 35a arranged. Over the cooling plate 34a If necessary, a heating of the battery cells 10a For example, at low outside temperatures, possible. For this, the cooling plate 34a , which preferably consists of a metallic material, flows through a warm fluid. The cooling plate 34a lies on a narrow side 46a of the cell block 45a on. The battery cells 10a have arrester lugs on the cooling plate 34a contact thermally.

The cell block 45a has a cuboid shape with a rectangular basic shape. Along narrow sides 46a . 47a and long sides 48a . 49a of the cell block 45a are the battery cells 10a arranged one behind the other. The battery cells 10a form a single-column row in the cell block 45a ,

The motor vehicle battery 30a indicates with the tempering 33a connected heat conducting element 53a on, that's one of the long sides 48a of the cell block 45a covered to more than half. The heat-conducting element 53a Thermally contacts all battery cells 10a of the cell block 45a , The battery cells 10a of the cell block 45a are each on more than half of a stretch along the long side 48a from the heat conducting element 53a thermally contacted. The heat-conducting element 53a is as Wärmeleitblech 55a executed.

An isolation element 56a is between the heat conducting element 53a and the cell block 45a arranged and is as another heat conducting foil 58a executed. Through the insulation element 56a may be a short circuit due to transmission on the cell block 45a lying voltage can be avoided. The heat-conducting element 53a covers the narrow side 46a on which the cooling plate 34a rests, partially and lies at one end on the cooling plate 34a on. From the cooling plate 34a from the heat conduction extends 53a parallel to the narrow side 46a and bends at right angles to the long side 48a from. At the end of the Wärmeleitelements 53a that on the cooling plate 34a rests, has the heat conducting element 53a thermal contact points 60a on which a low heat transfer resistance from the cooling plate 34a to the heat conducting element 53a given is. At the thermal contact points 60a is the heat conducting element 53a for example, with the cooling plate 34a screwed, glued, welded, soldered, crimped or connected by means of clinching.

The motor vehicle battery 30a includes another heat conducting element 54a that is symmetrical to the heat conducting element 53a is arranged and another long side 49a of the cell block 45a covered to a large extent. The further heat-conducting element 54a is also used as a heat conduction plate 55a executed. By the further heat-conducting element 54a is a uniform temperature of the battery cells 10a of the cell block 45a reached.

The motor vehicle battery 30a further includes isolation elements 57a between the tempering device 33a and the heat-conducting elements 53a . 54a are arranged and for electrical insulation between the tempering 33a and the heat-conducting elements 53a . 54a serve.

In one possible embodiment, the tempering device 33a Have a combined cooling and heating plate by placing in the cooling plate 34a a heating unit 52a is inserted or the cooling plate 34a can also be flowed through by a heated fluid.

In the 5 to 10 three further embodiments of the invention are shown. The following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, with reference in principle to the same reference components, in particular with respect to components with the same reference numerals, to the drawings and / or the description of the other embodiments, in particular 1 to 4 , can be referenced. To distinguish the embodiments of the letter a is the reference numerals of the embodiment in the 1 to 4 readjusted. In the embodiments of the 5 to 10 the letter a is replaced by the letters b to d.

The 5 and 6 show a second embodiment of a motor vehicle battery designed as a high-voltage motor vehicle battery 30b with a rectangular cuboid cell block 45b , the narrow sides 46b . 47b and long sides 48b . 49b and a plurality of serially and / or parallel connected battery cells 10b which has along the narrow sides 46b . 47b and the long sides 48b . 49b are arranged one behind the other, and with a tempering device 33b used to warm and / or cool the cell block 45b is provided. The tempering device 33b includes a cooling plate 34b on the narrow side 46b of the cell block 45b rests and the Ableiterfahnen the battery cells 10b thermally contacted.

The motor vehicle battery 30b indicates with the tempering 33b connected heat conducting element 53b on, that's the long side 48b of the cell block 45b covered to a large extent, as well as another Wärmeleitelement 54b that is symmetrical to the heat conducting element 53b is arranged and that another long side 49b of the cell block 45b covered to a large extent. The cell block 45b has two fixation plates to stabilize the cell block 45b on that as the heat-conducting elements 53b . 54b are executed. The heat-conducting elements 53b . 54b are over isolation elements 56b . 57b as heat transfer films 58b are executed, electrically from the cell block 45b on the long sides 48b . 49b isolated. The heat conducting elements designed as fixing plates 53b . 54b also enclose battery cells 10b partially at cell block ends.

The 7 to 9 show a third embodiment of a motor vehicle battery designed as a high-voltage motor vehicle battery 30c with a rectangular cuboid cell block 45c , the narrow sides 46c . 47c and long sides 48c . 49c and a plurality of serially and / or parallel connected battery cells 10c which has along the narrow sides 46c . 47c and the long sides 48c . 49c are arranged one behind the other, and with a tempering device 33c used to warm and / or cool the cell block 45c is provided. The tempering device 33c includes a cooling plate 34c outside a battery room 59c is arranged. The cooling plate 34c is above a narrow side 46c of the cell block 45c arranged. In an alternative embodiment, the tempering 33c alternatively to or in addition to the cooling plate 34c a heating unit 52c include.

The motor vehicle battery 30c indicates with the tempering 33c connected heat conducting element 53c on, that's the long side 48c of the cell block 45c covered to a large extent. The heat-conducting element 53c is on one side of the cooling plate 34c arranged and extends from the side of the cooling plate 34c in a straight line up to the long side 48c , The motor vehicle battery 30c also includes another heat-conducting element 54c that's another long side 49c of the cell block 45c covered to a large extent. The further heat-conducting element 54c is approximately symmetrical to the heat conducting element 53c arranged and forms a bearing surface for the cooling plate 34c out. Starting from the bearing surface for the cooling plate 34c , stands the other heat-conducting element 54c at right angles and extends from a bend straight until the other long side 49c , The heat-conducting elements 53c . 54c are over isolation elements 56c as heat transfer films 58c are executed, electrically from the cell block 45c on the long sides 48c . 49c isolated.

The 10 shows a further alternative embodiment of a motor vehicle battery designed as a high-voltage motor vehicle battery 30d with a rectangular cuboid cell block 45d , the narrow sides 46d . 47d and long sides 48d . 49d and a plurality of serially and / or parallel connected battery cells 10d which has along the narrow sides 46d . 47d and the long sides 48d . 49d are arranged one behind the other, and with a tempering device 33d used to warm and / or cool the cell block 45d is provided. The battery cells 10d are designed as bipolar frame flat cells. The battery cell 10d has two cover plates 11d . 12d on. The cover plates 11d . 12d , which each form a housing half, are made of an electrically conductive material. A cell frame 25d fixes the battery cells 10d mechanically. The cell frame 25d is executed in several parts. The cover plates 11d . 12d serve as poles of the battery cell 10d for introducing or removing the electrical power. The cell block 45d has a reinforcing element 61d on that in the cell frame 25d on the long side 48d is used and as a heat conducting element 53d is executed. The reinforcing element 61d is up to the tempering device 33d carried out.

LIST OF REFERENCE NUMBERS

10

battery cell

11

skin panel

12

skin panel

25

cell borders

30

Motor vehicle battery

31

casing

32

electronics

33

tempering

34

cooling plate

35

Heat conducting

42

internal combustion engine

43

electric motor

44

drive wheels

45

cell block

46

narrow side

47

narrow side

48

long side

49

long side

52

heating unit

53

thermally conductive element

54

thermally conductive element

55

heat conducting

56

insulation element

57

insulation element

58

Heat conducting

59

battery space

60

contact points

61

reinforcing element

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008034867 A1 [0002]

Claims (10)

Motor vehicle battery with at least one rectangular cuboid cell block ( 45a -D), the at least one narrow side ( 46a -d, 47a -D) and at least one long side ( 48a -d, 49a -D) and a plurality of serially and / or parallel connected battery cells ( 10a -D), which along the narrow side ( 46a -d, 47 a-d) and the long side ( 48a -d, 49a -D) are arranged one behind the other, and with a tempering device ( 33a -D) used to heat and / or cool the cell block ( 45a -D) is provided, characterized by at least one with the tempering device ( 33a -D) connected heat conducting element ( 53a -D), which is the long side ( 48a -D) of the cell block ( 45a -D) covered at least to a large extent. Motor vehicle battery according to claim 1, characterized by at least one insulation element ( 56a D) between the heat conducting element ( 53a -D) and the cell block ( 45a -D) is arranged. Motor vehicle battery according to claim 1 or 2, characterized by at least one insulation element ( 57a D) between the temperature control device ( 33a -D) and the heat conducting element ( 53a -D) is arranged. Motor vehicle battery according to one of the preceding claims, characterized in that the tempering device ( 33a -b; 33d ) at least one cooling plate ( 34a -b; 34d ) on the narrow side ( 46a -b; 46d ) of the cell block ( 45a -b; 45d ) rests. Motor vehicle battery according to claim 4, characterized in that the at least one heat conducting element ( 53a -D) the narrow side ( 46a -d, 47a -D) at least partially covered. Motor vehicle battery according to claim 4 or 5, characterized by at least one further heat conducting element ( 54a D) which is symmetrical to the at least one heat conducting element ( 53a -D) is arranged and another long side ( 49a -D) of the cell block ( 45a -D) covered at least to a large extent. Motor vehicle battery according to one of claims 1-3, characterized in that the tempering device ( 33c ) at least one cooling plate ( 34c ) and / or at least one heating unit ( 52c ) outside a battery compartment ( 59c ) is arranged. Motor vehicle battery according to one of the preceding claims, characterized by a fixing plate for stabilizing the cell block ( 45b ), which serves as a heat-conducting element ( 53b . 54b ) is executed. Motor vehicle battery according to one of the preceding claims, characterized in that the cell block ( 45d ) a cell frame ( 25d ) with a reinforcing element ( 61d ), which serves as a heat conducting element ( 53d . 54d ) is executed. Motor vehicle battery according to one of the preceding claims, characterized in that the tempering device ( 33a ) has a combined cooling and heating plate.

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