DE102019001687A1 - Battery arrangement with a battery and a heat sink - Google Patents

Abstract

The invention relates to a battery arrangement (16) with a battery (10) which has a plurality of battery cells (14) arranged in a battery housing (12) of the battery (10), and with a heat sink (28) for absorbing heat from the battery (10). The battery arrangement (16) has at least one adjustment device (30) by means of which the battery (10) from a first state, in which the battery (10) is thermally coupled to the heat sink (28) to a first extent, into a second State can be brought in which the battery (10) is thermally coupled to the heat sink (28) to a second extent different from the first extent.

Description

The invention relates to a battery arrangement with a battery which has a plurality of battery cells arranged in a battery housing of the battery, and with a heat sink for absorbing heat from the battery.

Batteries, such as those used to store electrical energy in electric vehicles, are mostly based on lithium-ion technology. The service life of an individual battery cell depends on the temperature at which the battery cell is operated and stored. Cooling or tempering therefore ensures that a desired temperature range is set for the battery cells. Accordingly, the battery is warmed up or heated when the outside temperature is cold and cooled when the outside temperature is high. So that the corresponding cooling power or heating power reaches the battery cells of the battery and is not transferred to a body of the motor vehicle when the battery is used in a motor vehicle, it can be provided that the battery is thermally insulated from the motor vehicle. Such thermal insulation also shields the battery from the environment.

For example, describes the DE 10 2014 218 137 A1 an energy storage module with a plurality of storage cells, which is arranged in a vehicle. By means of a spring element, flat tubes carrying cooling fluid are pressed from below against a module base of the energy storage module. The spring element is held at a distance from a housing on the vehicle body side by spacers in the form of housing domes. Accordingly, a cavity is formed between the vehicle body-side housing and a rear side of the spring element.

Furthermore, the DE 10 2011 081 537 A1 a battery system with battery cells, which have a housing, and a temperature control plate. When the temperature control plate is in operation, a temperature control fluid is guided in it. An upper wall of the temperature control plate has openings through which pins arranged on the housing of the respective battery cell are passed. The pins are immersed in the temperature control fluid.

A disadvantage of such temperature control concepts is the fact that it turns out to be difficult to achieve the desired temperature control of the battery cells even under different ambient conditions.

The object of the present invention is therefore to create a battery arrangement of the type mentioned at the outset which enables the battery to be tempered better as a function of ambient conditions.

This object is achieved by a battery arrangement with the features of claim 1. Advantageous configurations with expedient further developments of the invention are specified in the dependent claims.

The battery arrangement according to the invention comprises a battery which has a plurality of battery cells arranged in a battery housing of the battery, and a heat sink for absorbing heat from the battery. The battery arrangement has at least one adjustment device, by means of which the battery can be brought from a first state, in which the battery is thermally coupled to the heat sink to a first extent, into a second state. In the second state, the battery is thermally coupled to the heat sink to a second extent that is different from the first extent. By means of the at least one adjusting device, the battery can accordingly either be brought into the first state or into the second state. Accordingly, coupling of the battery to the heat sink of different strengths can be achieved by actuating the at least one adjusting device. In this way, an improved temperature control of the battery can be achieved depending on the ambient conditions.

In particular, the first degree of thermal coupling between the battery and the heat sink can be less than the second degree. Accordingly, the battery can be thermally decoupled from the heat sink in the first state and can be thermally coupled to the heat sink in the second state. Then, in the first state, a heat transfer from the battery to the heat sink is less than in the second state. In other words, the battery is then better thermally insulated in the first state than in the second state. By changing the thermal insulation of the battery, it can be achieved in particular that the battery is decoupled as far as possible from the heat sink at low ambient temperatures. As a result, the battery heats up during operation of the same, that is to say when charging and discharging the same, more quickly than would be the case with a thermal coupling with the heat sink to a greater extent. By actuating the at least one adjusting device, however, it can also be ensured that, for example at high temperatures, the battery is more strongly or better coupled to the heat sink. This allows better heat to be dissipated from the battery into the heat sink. In this way it is possible to that, for example, at high ambient temperatures, there is no undesirably strong heating of the battery.

The battery arrangement preferably has a thermal insulation device which is arranged outside the battery housing. Here, a thermal insulation effect of the insulation device can be changed by means of the adjustment device. By actuating the at least one adjustment device, it can be ensured that the thermal insulation effect of the insulation device is greater in particular in the first state than in the second state of the battery. By changing the thermal insulation effect of the thermal insulation device, the different strengths of coupling of the battery to the heat sink can be achieved in the different states of the battery in a particularly simple manner.

The at least one adjustment device can in particular be designed to compress the thermal insulation device in order to reduce the thermal insulation effect of the insulation device. Different actuation mechanisms can be used for this. For example, the adjusting device can be operated hydraulically and / or pneumatically and / or comprise an electric motor.

In particular, the adjusting device can have a variable length and can be designed, for example, in the manner of an extendable plunger or in the manner of a piston which can extend differently from a housing. Furthermore, it can be provided that a thermal bridge can be established between the heat sink and the battery by the at least one adjusting device itself, which has the variable length. In this way, the heat transfer from the battery to the heat sink can be easily adjusted as desired.

The thermal insulation device preferably comprises at least one surface element arranged outside the battery housing. Here, a distance between the surface element and the battery housing can be changed by means of the at least one adjusting device. This is based on the knowledge that with a smaller distance between the at least one surface element and the battery housing, the thermal insulation effect of the insulating device is less than with a greater distance between the at least one surface element and the battery housing. This applies in particular when an intermediate space delimited by the at least one surface element contains at least one gas. For example, there can be air in the space, in particular air, the pressure of which corresponds to the ambient pressure. This can be achieved in particular in that the space is open to the surroundings.

However, a closed intermediate space can also be formed in which air and / or at least one other gas can be located. Furthermore, it can be provided that a pressure of the at least one gas in the intermediate space is lower than the air pressure in the vicinity of the battery arrangement. Accordingly, the space can be vacuum sealed and / or have a thermally insulating gas. This makes it possible to achieve particularly good thermal insulation, particularly in the first state of the battery.

The thermal insulation device preferably comprises a plurality of the surface elements which can be moved towards one another by means of the at least one adjustment device. Additionally or alternatively, it can be provided that the thermal insulation device comprises a plurality of the surface elements, which can be brought into contact with one another by means of the at least one adjustment device. By moving the surface elements towards one another, a distance between the surface elements can be reduced. And when the distance between the surface elements is reduced, the thermal insulation effect of the insulation device is also reduced. This applies all the more if the surface elements are brought into contact with one another by means of the at least one adjustment device. Because then a very good heat transfer can be achieved via the surface elements themselves to the heat sink. However, even if a remaining space between the surface elements is very narrow, a thermal insulation effect of this space is very small, so that better thermal coupling with the heat sink can be achieved by moving the surface elements towards one another.

At least one heat-conducting element can be arranged in a space between two adjacent surface elements and / or in a space between the at least one surface element and the battery housing. The at least one heat-conducting element can be provided, for example, by contact pins, in particular metallic contact pins, a wire mesh, wire mesh or the like. By reducing a distance between the at least one surface element and the battery housing, the at least one surface element can come into contact with the at least one heat-conducting element, that is, it is in contact with the at least one heat-conducting element. Good heat conduction from the battery housing into the surface element and from the surface element further to the heat sink can then be achieved via the at least one heat-conducting element. By providing at least one The heat-conducting element in the intermediate space can thus be changed in a particularly simple and effective manner by actuating the at least one adjusting device, the thermal insulation effect of the insulating device.

The at least one surface element can in particular be formed from at least one metal. For example, the at least one surface element can be provided by a metal sheet or a metal plate. Good heat transfer to the heat sink can then be achieved via the surface element itself, as is particularly desirable in the second state of the battery. In addition, thermally insulating intermediate spaces can be provided very easily between metallic surface elements or between such a surface element and the battery housing, the size of which can be changed by actuating the at least one adjustment device.

Adjusting devices for improving the heat transfer can furthermore also be arranged inside the battery housing. Accordingly, the at least one adjustment device can also ensure that there is better thermal insulation of the battery cells from the battery housing in the first state. In contrast, the battery cells are then better thermally coupled to the battery housing, particularly in the second state. Then heat can be better dissipated to the heat sink via the battery housing.

In the first state of the battery, the at least one surface element is preferably held at a distance from the battery housing by means of at least one spacer. Such spacers can in particular be provided by elastic elements such as springs or similar components. However, pins with latching elements such as projections of the like can also ensure that the distance between the surface element and the battery housing is greater in one of the two states than in the other of the two states. By providing spacers of this type, it can be achieved in a particularly simple manner that the thermal insulation effect of the insulating device is greater in one of the two states than in the other of the two states.

Additionally or alternatively, in the first state of the battery, the at least one surface element can be held at a distance from the battery housing due to the force of gravity. This can also be implemented in a technically simple manner and ensures that in the first state the desired distance between the at least one surface element and the battery housing is set in a functionally reliable manner and with little effort.

The at least one spacer can be designed as a spring element and / or pin element which is compressed in the second state of the battery. The spacer then ensures that a certain distance between the at least one surface element and the battery housing is restored as soon as the adjustment device is no longer actuated. Accordingly, the distance between the at least one surface element and the battery housing can be set very easily and functionally reliably.

Additionally or alternatively, the at least one surface element for bringing the battery into the second state can be moved against gravity along the at least one spacer. For example, the at least one spacer can be designed in the manner of a pin which passes through the at least one surface element and which has a stop for the surface element. The surface element then rests against this stop due to the effect of gravity. However, if the at least one surface element is moved counter to gravity by means of the at least one adjustment device, then such a pin serves as a guide for the movement of the surface element towards the battery housing. In particular, such a configuration makes it possible to achieve in a very simple and reliable manner that in the second state the at least one surface element rests against the battery housing and / or the surface elements rests against one another.

At least one locking element can be arranged on the at least one spacer which, in the first state of the battery, keeps the at least one surface element at a distance from the battery housing. Here, by means of the at least one adjusting device, the at least one locking element can be overcome by the at least one surface element. In other words, actuation of the at least one adjusting device can cause the at least one surface element to overcome the at least one blocking element. Such a locking element can be designed, for example, in the manner of a projection formed from an elastic material, as a wire bracket of the like. Such a blocking element can set a predetermined distance between the at least one surface element and the battery housing. However, this distance can be reduced by overcoming the locking element. Also such a mechanism for reducing the distance between the surface element and the battery housing or for reducing the distances between Surface elements can be implemented in a technically simple and inexpensive manner.

The heat sink can in particular comprise at least one body component and / or at least one paneling part of a motor vehicle. Because, for example, in cold ambient temperatures, good thermal insulation of the battery from body components or paneling parts, in particular exterior paneling parts, of the motor vehicle ensures that the battery can be heated up quickly during operation. In contrast, a thermal coupling with the body component of the motor vehicle and / or the paneling part of the motor vehicle can achieve particularly good dissipation of the heat from the battery. This is advantageous, for example, when the ambient temperatures are high and the battery is being operated, that is to say, for example, being charged or discharged.

The use of the at least one body component of the motor vehicle and / or of the at least one paneling part of the motor vehicle as a heat sink has proven to be particularly efficient when it comes to dissipating excess heat from the battery.

Additionally or alternatively, the heat sink can be provided by ambient air which surrounds the battery housing at least in some areas. In this way, a variable temperature transition to the ambient air surrounding the battery can be achieved. In particular, in the first state of the battery, heat dissipation by the battery to the environment or the ambient air can be made more difficult compared to the thermal coupling in the second state. In contrast, if a thermal coupling with the heat sink in the form of the ambient air is achieved to a greater extent in the second state, for example, improved cooling of the battery can be achieved. Using the ambient air as a heat sink is particularly cost-effective.

The battery arrangement preferably has a control device which is designed to move the battery from the first state into the second state as a function of a temperature by actuating the at least one adjustment device. Additionally or alternatively, the control device is designed to move the battery from the second state into the first state as a function of the temperature by actuating the at least one adjustment device. By providing the control device, the temperature of the battery can be controlled as a function of the temperature, in particular as a function of an ambient temperature, in that the control device causes the actuation of the at least one adjustment device. In this way, particularly when using the battery arrangement in a motor vehicle, for example in an electric vehicle or in a hybrid vehicle, a desired temperature control of the battery can be ensured at any time.

Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and with reference to the drawings. The features and combinations of features mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively specified combination, but also in other combinations or alone, without the scope of the Invention to leave.

• 1 stark schematisiert und ausschnittsweise eine Batterie eines Kraftfahrzeugs, welche thermisch gegenüber einer Karosserie des Kraftfahrzeugs durch voneinander auf Abstand gehaltene Bleche isoliert ist;
• 2 eine thermische Kopplung der Batterie mit der Karosserie des Kraftfahrzeugs durch Ausfahren eines Stempels und ein dadurch bewirktes Zusammendrücken der Bleche;
• 3 eine Variante der Batterieanordnung gemäß 1, bei welcher zwischen den Blechen wärmeleitende Elemente angeordnet sind;
• 4 eine weitere Variante einer die Batterie umfassenden Batterieanordnung, bei welcher über ein Einfahren eines Stempels eine thermische Entkopplung der Batterie von der Karosserie des Kraftfahrzeugs erreicht ist;
• 5 die Variante gemäß 4, wobei der Stempel einen wärmeleitenden Kontakt zwischen der Batterie und der Karosserie des Fahrzeugs herstellt; und
• 6 eine weitere Variante der Batterieanordnung, bei welcher eine thermische Kopplung der Batterie mit der Umgebung verändert werden kann.

Show:

• 1 highly schematized and in detail, a battery of a motor vehicle which is thermally insulated from a body of the motor vehicle by metal sheets held at a distance from one another;
• 2 a thermal coupling of the battery with the body of the motor vehicle by extending a ram and thereby causing the metal sheets to be compressed;
• 3 a variant of the battery arrangement according to 1 , in which heat-conducting elements are arranged between the sheets;
• 4th a further variant of a battery arrangement comprising the battery, in which thermal decoupling of the battery from the body of the motor vehicle is achieved by retracting a stamp;
• 5 the variant according to 4th wherein the stamp makes a thermally conductive contact between the battery and the body of the vehicle; and
• 6th Another variant of the battery arrangement in which a thermal coupling of the battery with the environment can be changed.

From a battery 10 of a motor vehicle is in 1 highly schematized a wall of a battery case 12 shown. The battery case 12 surrounds a plurality of battery cells 14th , of which only a few are provided with a reference symbol here. The battery cells 14th , which are electrically connected in series and / or in parallel, are thus within the battery housing 12 arranged. Through the electrically conductive connection of the battery cells 14th together the battery can 10 provide a higher voltage and / or a greater current than a single battery cell 14th able. The battery 10 can in particular be designed as an electrical energy store of a motor vehicle designed as an electric vehicle or as a hybrid vehicle. The battery 10 can thus be designed as an electrical energy store for such a motor vehicle or provide at least part of such an electrical energy store.

The battery cells, for example designed as lithium-ion cells 14th should be operated within a certain temperature window, if possible, in order to ensure a long service life and high performance of the battery cells 14th or the battery 10 to ensure.

With an in 1 shown variant of the battery 10 comprehensive battery arrangement 16 of the motor vehicle includes the battery assembly 16 a thermal isolator 18th . Here, the isolating device includes 18th a plurality of surface elements or sheets formed from metal 20th . A first of the sheets 20th can on the battery case 12 are present, of which only one wall is shown here. Between this sheet 20th and another sheet 20th is a space 22nd formed, which can contain air at ambient pressure or in which a negative pressure compared to the pressure in the environment can be present. In an analogous way is between this second sheet 20th and a third, outer sheet 20th another space 24 formed, which can also contain air at ambient pressure or in which there can be a negative pressure in relation to the environment. The sheets 20th are by springs 26th kept at a distance, which in 1 are only shown schematically. Due to the distance between the sheets 20th from each other and the provision of the gaps 22nd , 24 between the sheets 20th is the battery 10 to their surroundings through the isolation device 18th thermally well insulated.

In this, in 1 shown first state of the battery 10 is therefore a comparatively large thermal decoupling of the battery 10 reached by the environment or the motor vehicle. In contrast, in 2 the battery 10 shown in a second state in which the battery 10 is thermally insulated from its surroundings to a lesser extent. Accordingly, the battery is in the second state 10 to a greater extent thermally coupled with a heat sink. As this heat sink is in 2 for example a body part 28 of the motor vehicle shown schematically. On this body part 28 is at the in 2 shown variant of the battery arrangement 16 an adjustment device in the form of a stamp 30th attached. The Stamp 30th or such an adjustment device is in 2 shown in an extended state. The punch presses accordingly 30th the isolation device 18th together. A distance between the sheets 20th from each other is thus at least partially, in particular completely reduced.

To operate the stamp 30th A hydraulic or pneumatic (not shown here) actuating device and / or a motor, in particular an electric motor, can be provided. By reducing the distance between the sheets 20th , especially by fully compressing the isolating device 18th such that the sheets 20th rest against each other, the thermal insulation effect of the insulation device 18th decreased. This already causes the battery to give off heat 10 relieved to the environment. In addition, the length of the stamp can be changed 30th the heat transfer between the battery 10 and the vehicle is increased, of which the body component is only shown schematically and by way of example 28 is shown. The Stamp 30th or such an adjusting device can be used, for example, to adjust the battery 10 after a trip of the motor vehicle with the body component 28 to connect or to couple thermally. This will save the battery 10 improved chilled. Because the heat sink in the form of the motor vehicle or the body component 28 can heat the battery 10 record better than in the first state of the battery 10 which in 1 is shown.

Due to the structure with the movable stamp 30th can thus in particular the sheets 20th be pressed together, so be moved towards each other. The over pins and / or the springs 26th interconnected sheets 20th are consequently designed to be movable. By moving the metal sheets 20th can choose between thermal insulation or thermal coupling of the battery 10 with the heat sink in the form of the motor vehicle component 28 can be achieved.

In 2 is a control device 32 the battery assembly 16 shown which pressing the stamp 30th or such an adjusting device of the battery arrangement 16 causes. In particular, in the control device 32 a program can be implemented, according to which depending on a temperature by actuating the stamp 30th the degree of thermal coupling of the battery 10 can be changed with the heat sink.

In a variant of the battery arrangement (not shown) 16 can the stamp 30th for example on the battery housing 12 be attached and the sheets 20th to the outside, i.e. in a direction towards the body component 28 . The isolation device 18th can here in the first state, in which the greatest possible thermal decoupling from the body component 28 is present from the body component 28 be spaced. In the second state, in which the improved thermal coupling of the battery 10 with the body component 28 is set, the isolation device 18th in contrast to the body component 28 and the sheets 20th can be moved towards one another in such a way that the respective space 22nd , 24 between the sheets 20th is partially reduced or the sheets 20th completely against each other. Here, too, the stamp represents 30th in its extended position the thermally conductive contact to the body component 28 over the sheets 20th the isolation device 18th here.

In 3 is another variant of the battery arrangement 16 shown in which in the spaces 22nd , 24 between the sheets 20th Heat conducting elements in the form of a respective wire mesh 34 or knitted wire or the like are arranged. Such heat-conducting elements can ensure that with an only partial reduction in the size of the space 22nd , 24 an improved heat transfer between the sheets 20th can be achieved. Because the heat conducting elements, which also through the sheets 20th arranged, in particular metallic, contact pins can be provided, provide for compressed springs 26th (compare 2 ) for heat transfer by conduction from the battery 10 on the furthest out sheet metal 20th .

The control device 32 can especially ensure that at low temperatures the battery 10 is thermally decoupled from the motor vehicle. In particular, this can be provided when temperatures of less than 0 ° C. are present, for example in winter. At such low ambient temperatures, the battery is thermally decoupled 10 from the motor vehicle that the battery 10 warms up particularly quickly during operation. At moderate temperatures, such as can occur, for example, in spring or autumn, the control device 32 continue to keep the battery 10 is thermally decoupled from the motor vehicle. A cooling of the battery 10 during operation of the same can then be achieved, for example, by a cooling device (not shown here). In particular, the cooling device can comprise at least one cooling plate through which a cooling liquid flows and through which heat is drawn from the battery 10 can be discharged.

At high ambient temperatures, such as those that may exist in summer, for example, the control device 32 cause the stamp 30th is extended or pushed down. Then the battery 10 about the stamp 30th thermally with the motor vehicle or the at least one body component 28 coupled. In such a state, the battery 10 in particular are spent when temperatures of more than 30 ° C, in particular of more than 35 ° C are present. By spending the battery 10 in these, schematically in 2 shown condition, heat can get better from the battery 10 are discharged and introduced into the heat sink.

In 4th and 5 is a variant of the battery arrangement 16 shown in which no thermal insulation device 18th with sheet metal 20th is provided. According to 4th is the battery 10 in this case from the body component 28 thermally decoupled, and the stamp 30th is not extended. There is a corresponding distance 36 between the stamp 30th and the battery case 12 before when the battery 10 is in the first state in which the battery 10 not with the heat sink in the form of the body component 28 is coupled.

In 5 is the battery 10 in the one with the body part 28 shown thermally coupled state. The stamp is accordingly 30th extended. The Stamp 30th thus provides the heat-conducting contact between the motor vehicle or, in the present case, the body component 28 and thus the heat sink and the battery 10 here. When the stamp 30th however, in its not extended, in 4th is in the position shown, so provides in particular an air gap between the body component 28 and the battery case 12 for the thermal decoupling of the battery 10 from the motor vehicle.

Another variant of the battery arrangement 16 is in 6th shown. The (in 6th not shown) control device 32 not like in 1 to 5 shown a variable temperature transition to the motor vehicle used to a desired temperature control of the battery 10 to reach. Rather, ambient air serves as a heat sink 38 which are in the vicinity of the battery 10 is located. Is the battery 10 thus better compared to the environment or the ambient air 38 thermally insulated, so is the battery 10 thermally coupled to this heat sink to a first extent. Using the (in 6th not shown) control device 32 however, the in 6th shown battery 10 be placed in the second state in which the battery 10 is thermally coupled to the heat sink to a greater extent.

Even with the in 6th shown variant of the battery arrangement 16 are outside the battery 10 or outside of the Battery case 12 Surface elements in the form of preferably metallic sheets 20th arranged. By means of at least one adjusting device, for example in the form of a lever 40 or the like can be a distance between the sheets 20th from each other and from the battery case 12 be reduced.

For example, using the in 6th lever shown on the left 40 caused that the lower of the two in 6th sheets shown as an example 20th on the battery case 12 closer sheet metal 20th too is moved. The lever 40 can be designed for this in the manner of a pull rod or similar actuating element.

In particular, the lever 40 a stop 42 have on which the outer of the two sheets 20th due to gravity. Now becomes the lever 40 along with the attack 42 on the battery 10 moved too, so the outer sheet arrives 20th in contact with the second sheet 20th which is closer to the battery case 12 is arranged. Between this second sheet 20th and the battery case 12 is a pen-shaped spacer 44 arranged, which here also has a stop 46 having. On this stop 46 is that the battery case 12 closer sheet metal 20th due to gravity.

The spacer 44 can be designed compressible. Then can by operating the lever 40 achieved that the second sheet 20th which is the battery case 12 closer, in contact with the battery case 12 is brought. The spacer is used for this 44 compressed or collapsed accordingly.

Alternatively it can be provided that the spacer 44 is passed through a passage opening in the second sheet 20th is trained. Then you can use the lever against gravity 40 the second sheet 20th along the spacer 44 on the battery case 12 to be moved and in particular the second, inner sheet 20th in contact with the battery case 12 to be brought. One analogous to the spacer 44 formed further spacer can also be between the first, outer sheet 20th and the second, inner sheet 20th be provided or arranged. Furthermore, the lever 40 be passed through a passage opening in the outer sheet 20th is trained.

When the sheets 20th not like in 6th shown schematically in the direction of gravity below the battery housing 12 or the battery 10 are arranged, but laterally next to the battery housing 12 or above the battery case 12 , differently designed spacers can ensure that the sheets 20th in the first state of the battery 10 at a distance from the battery housing 12 are held. For example, between the battery housing 12 and the sheet metal 20th which is the battery case 12 closer than a spring spacer 48 or the like spring element be arranged. By compressing this spring 48 can be ensured that the sheet metal 20th which is the battery case 12 closer, in contact with the battery case 12 is brought. This can be done by confirming another adjustment device which is shown in 6th is also shown schematically and as a further lever 50 or the like actuating element can be formed.

Furthermore, between the inner, the battery housing 12 closer sheet metal 20th and the outer sheet 20th another spring element or another spring 52 be arranged. By operating the lever 50 can this feather 52 be compressed and so the outer sheet 20th on the inner sheet 20th too moved and especially with the inner sheet 20th be brought into plant. Will the lever 50 or such an adjusting device no longer from the control device 32 controlled, so take care of the springs 48 , 52 ensuring that the thermal insulation of the battery 10 serving distance between the sheets 20th and between the inner sheet 20th and the battery case 12 is restored or discontinued. By operating the lever 50 however, the thermal insulation effect of the sheet metal can also be used here 20th formed thermal insulation device 18th be reduced. The sheets 20th are for example by means of the lever 50 adjusted so that a desired distance between the sheets 20th can be adjusted from each other.

Another variant, a desired distance between the sheets 20th from each other or from the battery housing 12 can be set from the schematic diagram of the battery arrangement 16 on the right in 6th evident. Accordingly, at least one spacer 54 through which at least one sheet metal 20th at a distance from the battery housing 12 is held, a wire spring 56 or the like locking element be arranged. The wire spring 56 prevents in the first state the battery 10 in which the battery 10 thermally from the ambient air 38 is decoupled, the sheet metal 20th closer than to the wire spring 56 or the like locking element on the battery housing 12 too can be moved.

Using an in 6th shown schematically and in particular as a further lever 58 trained adjusting device can be taken care of be that the sheet metal 20th further onto the battery housing 12 too can be moved. For example, by means of the lever 58 the wire spring 56 be overpressed. In an analogous manner, another blocking element (not shown) can ensure that the battery is in the first state 10 the two sheets 20th have a certain distance from each other. By operating the lever 58 this blocking element (not shown) can then also be overcome or pressed over and the outer sheet metal 20th in contact with the inner sheet 20th to be brought.

The spacer 44 which the one below the battery 10 arranged sheet metal 20th due to the force of gravity at a distance from the battery housing 12 holds, can also be designed in the manner of a pin, which when retracting the sheets 20th , that is, when moving the thermal insulation device 18th can be brought together compactly in the state with the lower insulation effect.

The spacer designed in the manner of an incompressible pin 44 can, however, as already mentioned, through a passage opening in the respective sheet metal 20th be passed through so that the sheets 20th can be moved against gravity along such pins to the thermal insulation effect of the insulating device 18th to reduce. In particular, the pin can pass through an opening in the respective sheet metal 20th pass through, which has an elastic sleeve or the like seal. This allows a thermal insulation effect of at least one between the metal sheets 20th or between the inner sheet 20th and the battery case 12 located gas are particularly largely maintained.

The compressible springs 48 , 52 or similar elastic mountings can be attached to the sheets 20th be arranged to with the lever not actuated 50 the sheets 20th at a distance from each other or from the battery housing 12 to keep.

About the levers 40 , 50 , 58 can preferably both the retraction of the sheets 20th as well as extending the sheets 20th be effected.

When referring to 6th explained variant is provided in particular that in an operation of the battery arrangement 16 , in which there are low ambient temperatures, the sheets 20th are extended to the battery cells 14th or the battery 10 As far as possible from the environment or the ambient air 38 to be thermally decoupled. In contrast, at high ambient temperatures it is preferably provided that the metal sheets 20th during operation of the battery arrangement 16 are retracted to heat the environment or the ambient air 38 pay off or give up.

List of reference symbols

10

battery

12

Battery case

14th

Battery cell

16

Battery arrangement

18th

Isolation device

20th

sheet

22nd

Space

24

Space

26th

feather

28

Body component

30th

stamp

32

Control device

34

wire mesh

36

distance

38

Ambient air

40

lever

42

attack

44

Spacers

46

attack

48

feather

50

lever

52

feather

54

Spacers

56

Wire spring

58

lever

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 102014218137 A1 [0003]
• DE 102011081537 A1 [0004]

Claims (10)

Battery arrangement, in particular for a motor vehicle, with a battery (10) which has a plurality of battery cells (14) arranged in a battery housing (12) of the battery (10), and with a heat sink (28) for absorbing heat from the battery ( 10), characterized in that the battery arrangement (16) has at least one adjusting device (30, 40, 50, 58) by means of which the battery (10) from a first state in which the battery (10) with a first extent the heat sink (28) is thermally coupled, can be brought into a second state in which the battery (10) is thermally coupled to the heat sink (28) to a second extent different from the first extent. Battery arrangement according to Claim 1 , characterized in that the battery arrangement (16) has a thermal insulation device (18) which is arranged outside the battery housing (12), wherein by means of the at least one, in particular having a variable length, adjusting device (30, 40, 50, 58) a thermal insulation effect of the insulation device (18) can be changed. Battery arrangement according to Claim 2 , characterized in that the thermal insulation device (18) comprises at least one surface element (20) arranged outside the battery housing (12), in particular delimiting at least one gas-containing space (22, 24), wherein by means of the at least one adjusting device (30, 40, 50, 58) a distance between the at least one surface element (20) and the battery housing (12) can be changed. Battery arrangement according to Claim 3 , characterized in that the thermal insulation device (18) comprises a plurality of the surface elements (20) which can be moved towards one another and / or brought into contact with one another by means of the at least one adjusting device (30, 40, 50, 58). Battery arrangement according to Claim 3 or 4th , characterized in that in a space (22, 24) between two adjacent surface elements (20) and / or in a space (22, 24) between the at least one surface element (20) and the battery housing (12) at least one heat conducting element (34 ) is arranged. Battery arrangement according to one of the Claims 3 to 5 , characterized in that the at least one, in particular formed from at least one metal, surface element (20) in the first state of the battery (10) by means of at least one spacer (44, 48, 52, 54) and / or due to gravity Distance from the battery housing (12) is kept. Battery arrangement according to Claim 6 , characterized in that the at least one spacer (44, 48, 52, 54) is designed as a spring element and / or pin element compressed in the second state of the battery (10) and / or the at least one surface element (20) for moving the battery (10) can be moved into the second state against gravity along the at least one spacer (44, 54). Battery arrangement according to Claim 6 or 7th , characterized in that at least one locking element (56) is arranged on the at least one spacer (54), which in the first state of the battery (10) holds the at least one surface element (20) at a distance from the battery housing (12), wherein by means of the at least one adjusting device (30, 40, 50, 58), the at least one locking element (56) can be overcome by the at least one surface element (20). Battery arrangement according to one of the Claims 1 to 8th , characterized in that the heat sink comprises at least one body component (28) and / or at least one paneling part of a motor vehicle and / or is provided by ambient air (38) which surrounds the battery housing (12) at least in some areas. Battery arrangement according to one of the Claims 1 to 9 , characterized in that the battery arrangement (16) has a control device (32) which is designed to move the battery (10) as a function of a temperature by actuating the at least one adjusting device (30, 40, 50, 58) from the first To spend state in the second state and / or from the second state in the first state.

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