DE102012218750B4 - Battery module with several devices for controlling the temperature of an energy store - Google Patents

Abstract

Battery module (19) with several devices (1) for temperature control of at least one energy store, and with several energy stores (15), each of the energy stores (15) flatly adjoining at least one of the contact surfaces (3) of the devices (1), each device ( 1) for tempering at least one energy store, each comprising a heat conducting plate (2) which can be connected in a thermally conductive manner to an outer surface of the energy store (15) via at least one contact surface (3) of the heat conducting plate (2), the device (1) also being a tube (4) for conducting a fluid medium, the tube (4) being connected to the heat-conducting sheet (2) in a thermally conductive manner, the heat-conducting sheet (2) having an edge region (5) outside the at least one contact surface (3), the tube (4) comprises a pipe section (6) which has a course along the edge region (5), wherein the pipe section (6) rests on the edge region (5) in this course along the edge region (5) is, characterized in that the heat conducting plates (2) of the devices (1) are arranged one behind the other in a row-like sequence, the edge regions (5) of the heat conducting plates (2) being widened on at least two opposite sides of the respective heat conducting plate (2) have, wherein the widenings (17) are designed to form one or more outer walls (22) of the battery module (19) with one another in the aforementioned row-like sequence, and the widenings (17) by forming and / or bending the heat-conducting plate (2) into the Edge area (5) are formed.

Description

The invention relates to a battery module with several devices for temperature control of several energy stores.

Energy stores are generally used to provide the energy required to drive a vehicle, for example a hybrid or electric vehicle. Electric energy stores, such as electrostatic energy stores and electrochemical energy stores, are particularly suitable as energy stores in the case of a hybrid or electric vehicle. Specific examples are galvanic cells (e.g. lithium-ion cells, lead batteries, zinc / air cells, lithium / air cells, nickel metal hydride cells) and capacitors (e.g. double layer capacitors - DLC) or fuel cells. Typically, energy stores are connected to one another to form a battery in order to provide sufficient operating voltage and to meet energy and power requirements that arise during operation, for example by connecting the energy stores in parallel or in series.

When operating such energy stores, it is generally necessary that the temperature of the energy store is kept within a predefined setpoint range or at least does not exceed or fall below predefined limit temperatures. If possible, this should also be ensured in the event of strong heat development in the energy store, such as during power peaks, that is to say with very strong discharge currents, and fast charging processes, that is, for example, with very high charging currents.

A device for cooling a battery of several electrical energy stores of a vehicle is, for example, off DE 10 2009 029 629 A1 known. The device described there comprises flat tubes through which a heat transfer medium can flow and configured as multi-channel tubes as well as a collecting tube and a distributor tube. These tubes are connected to one another in such a way that a holding frame is formed with chambers for accommodating the energy stores in the chambers. The device can also have the chambers of heat-conducting plates, which serve to segment the chambers and enable flat contact with the surface of the battery units. On each of the heat-conducting plates, several of the mercury flat tubes are connected in a thermally conductive manner, whereby a heat transfer between the multi-channel flat tubes should also be achieved.

The disadvantage of known devices for temperature control of energy stores is that they take up a lot of installation space and are also complex and expensive to manufacture.

A battery and / or a battery module with a cooling device is for example from the DE 10 2011 109 286 A1 , of the DE 10 2010 013 025 Al that KR 10 2011 0 126 765 A and the KR 10 2012 0 016 590 A known.

It is an object of the present invention to specify a battery module with a plurality of devices that enables the energy storage device to be tempered and at the same time saves space and can be manufactured inexpensively and easily.

According to the invention, this object is achieved by a battery module according to the independent claim. Further developments and special embodiments result from the features of the dependent claims.

A battery module described here comprises several devices and several energy stores. A device for controlling the temperature of one or more energy stores, for example energy stores of the type mentioned or the examples mentioned at the beginning, comprises a heat conducting plate, which can also be referred to as a cooling fin, which via at least one contact surface of the heat conducting plate with an outer surface of one or more of the energy stores is thermally connectable. The device also comprises a tube for guiding a fluid medium, wherein the medium can be a liquid or else a gas. The pipe is connected to the heat conducting plate in a thermally conductive manner.

Each of the mentioned at least one contact surface is typically spatially contiguous and preferably designed flat and also as large as possible in order to enable the most effective heat transfer possible between the at least one energy store and the heat conducting plate. With this at least one contact surface, the heat conducting plate typically adjoins the energy store or the energy store.

The pipe section preferably lies flat against the edge region. The pipe section is connected to the edge area in a heat-transferring manner, it being possible for this to be provided by direct physical contact, preferably flat or also linear or punctiform, between the pipe section and the edge area. A heat-transferring connection between the pipe section and the contact surface can be provided by the direct abutting arrangement of the pipe section and the contact surface and can also be supported by a heat-transferring material, the positioning of the pipe section connects to locations on the contact surface where the pipe section and the contact surface do not physically abut one another. As the pipe section rests directly on the edge area, due to the heat transferring connection provided thereby, an arrangement is also provided in which the pipe section is connected to the edge area via a thermally conductive material, for example via a (preferably elastic) heat pad or via a (preferably elastic) bead connected is. The material therefore physically connects the pipe section to the edge area, and in particular produces a heat-transferring connection that connects the pipe section directly to the edge area of the contact surface in a mechanical manner and in particular in a heat-transferring way.

The function of the medium conducted through the pipe is to absorb and transport away the heat given off by the energy stores to the heat conducting plate in order to cool the energy stores. It is also possible, if necessary, to transport thermal energy into the device by means of the medium and to transfer it to the energy store in order to heat the energy store. As a rule, when the energy store is in operation, for example when supplying energy to a drive of an electric or hybrid vehicle, it is more frequently necessary to cool the energy store than to heat it.

One aspect of the concept described here is that the heat conducting plate has an edge area outside the contact surface and that the tube comprises a tube section, this tube section running along the edge area. This means that the pipe section runs along the edge area. At the same time, that is to say in this course along the edge area, the pipe section lies flat on the edge area. In this case, the pipe section, with an outer surface of the pipe section facing the edge region, touches an outer surface of the edge region facing the pipe section. In the course mentioned, the pipe section preferably runs continuously and continuously along the edge region. In embodiments in which the edge region has one or more gaps, the pipe section bridges these gaps preferably along the shortest and most direct path possible. The named course of the pipe section is typically also parallel to the outer surface of the edge region facing the pipe section. This edge region preferably runs around the at least one contact surface completely or at least partially. Preferably, the pipe rests exclusively with this pipe section on the heat-conducting sheet and thus exclusively in the named edge area outside the contact area.

Since the pipe section resting on the heat conducting plate rests on the edge area, it lies outside the contact area on the heat conducting plate or outside a region of the heat conducting plate which is arranged on a side of the heat conducting plate opposite the contact area. In this way, on the one hand, a simple construction of the device and, at the same time, an effective heat transfer between the medium guided in the pipe and the at least one energy store adjoining the contact surface (s) are made possible. In addition, it is possible for the heat conducting sheet to have one of the at least one contact surface on two opposite sides, hereinafter also referred to as the front and back of the heat conducting sheet, the named edge region of the heat conducting sheet being arranged outside of both of these contact areas. Effective heat transfer between the medium carried in the pipe and the energy storage device adjoining these contact surfaces can then be achieved over very short distances. When cooling the energy store, the heat from both energy stores is transferred to both contact surfaces on the front and back, first passed on to the edge area in the heat conducting plate and from there transferred to the pipe section and the medium contained therein. When cooling, the heat transfer takes place in the opposite direction. In a typical embodiment that is particularly easy to manufacture, the heat conducting sheet is designed completely, at least in the edge region, to be flat or planar. The contact surfaces are also typically designed to be flat and flat. In this case, the pipe section, possibly over the entire pipe, runs completely parallel to the contact surface. It is also possible for the edge area to be bent out of a plane defined by the contact surfaces by reshaping or bending the heat-conducting sheet. In this way, for example, a deepening of the contact surface in relation to the edge area and thus better fixing of the energy store can be achieved. The heat conducting sheet can be given, for example, as a stamped and bent part or can be produced in a stamping and bending process. In addition, the edge area can have holding elements for holding and fixing the pipe on the heat conducting plate.

Since the pipe section runs on the edge area and thus outside the contact surface and not across it, the device also allows - in a direction perpendicular to the contact surface - a spatially very compact arrangement of the device relative to the at least one energy store, since the energy store is direct and can adjoin the contact surface over a large area and the pipe not between the contact surface and the energy store adjoining this contact surface is arranged.

It is provided that each of the energy stores is flat adjacent to at least one of the contact surfaces of the devices.

According to the invention it is further provided that the edge areas of the heat conducting plates have widenings on at least two mutually opposite sides of the respective heat conducting plate. These widenings can be designed to form one or more mechanically stabilizing outer walls of the battery module with one another in the aforementioned row-like sequence. In this way, a compact structure can be achieved in that the heat conducting plates of the devices are arranged one behind the other in a row-like sequence.

The contact surfaces of the heat conducting plates are preferably aligned parallel to one another and, furthermore, the widened areas of the edge regions are aligned perpendicular to the contact surfaces. These outer walls can be designed to mechanically connect adjacent heat conducting plates in the battery module to one another. For this purpose, they can have corresponding connecting elements, such as bulges, locking lugs and corresponding receptacles.

• - das Dreifache, besonders bevorzugt kleiner als das Doppelte, des maximalen Außendurchmesser des Rohrabschnitts,
• - 10%, besonders bevorzugt kleiner als 5%, der Länge einer Längsseite des Wärmeleitblechs oder
• - 3 cm, besonders bevorzugt kleiner als 2 cm.

The pipe section is preferably arranged as close as possible to the outermost edge of the heat-conducting sheet in order to be able to run around as large a contact surface as possible without running over this contact surface. In order to make this possible, the edge area has the smallest possible width. The width of the edge area at a given point of the edge area is measured parallel to the contact surface and perpendicular to the course of the pipe section at this point. The width of the edge region is preferably not greater at any point, that is to say less than everywhere

• - three times, particularly preferably less than twice, the maximum outer diameter of the pipe section,
• - 10%, particularly preferably less than 5%, of the length of a longitudinal side of the heat conducting sheet or
• - 3 cm, particularly preferably less than 2 cm.

In an embodiment that is particularly easy to manufacture, it is provided that the outer surface of the pipe section that lies flat against the outer surface of the edge area is materially connected to this outer surface of the edge area, preferably by gluing, soldering or welding. It is just as easily possible for the outer surface of the pipe section that lies flat against the outer surface of the edge area to be connected to this outer surface of the edge area by clamping, pressing or squeezing. Correspondingly, the production method proposed here provides that an outer surface of the pipe section lying flat against the edge area is materially connected to the edge area, preferably by gluing, soldering or welding, or is connected to the edge area by clamping, pressing or squeezing with the edge area.

In one embodiment, the pipe section has partial sections in said course which are bent along the edge region. In this way it can be achieved that the named course is maintained and the contact surface is completely or at least partially encircled by the pipe section. The curved subsections can be bent around the contact surface along a common direction of rotation. It is also possible for each of the curved subsections to have an angle of curvature and for a total sum of the angles of curvature to be at least 170 ° or at least 260 °. In the case of a total between 170 ° and 190 °, i.e. of about 180 °, for example, a U-shaped course of the pipe section can be achieved. In the case of a total of approximately 270 °, it can be achieved that the pipe section completely surrounds the contact surface.

It is also possible, for example in the typical case of rectangular contact surfaces, for the pipe section to have straight subsections in the named course, the straight subsections being connected to one another by the curved subsections.

Typically, the pipe has a flow connection at a first end of the pipe for connecting the pipe to a feed line for feeding the medium into the pipe and the pipe also has a return connection at a second end of the pipe for connecting the pipe to a return line for return of the medium from the pipe, the pipe section preferably continuously connecting the flow connection to the return connection.

• - das Fünffache, besonders bevorzugt weniger als das Vierfache, des maximalen Außendurchmesser des Rohrabschnitts,
• - 15%, besonders bevorzugt weniger als 10%, einer maximalen Länge oder eines maximalen Durchmessers der Kontaktfläche oder
• - 3cm, besonders bevorzugt weniger als 2 cm.

It is possible here for the flow connection and the return connection to protrude in a self-supporting manner from the edge region of the heat baffle. Then, starting from the flow connection, the pipe nestles in a first Contact point between the pipe and the heat conducting plate at the edge area and merges at this contact point into the said pipe section. In addition, starting from the return connection, the pipe clings to the edge area in a last contact point between the pipe and the heat conducting plate and merges into the pipe section mentioned at this last contact point. Preferably, a distance between the first contact point and the last contact point is less than

• - five times, particularly preferably less than four times, the maximum outer diameter of the pipe section,
• - 15%, particularly preferably less than 10%, of a maximum length or a maximum diameter of the contact surface or
• - 3 cm, particularly preferably less than 2 cm.

The smaller this distance, the more completely the tube runs around the contact surface and the better and more effective the thermal coupling between the medium around the contact surface. However, it is also possible to achieve sufficient thermal coupling with a U-shaped profile of the pipe section.

The tube preferably has an elongated cross-section at least in the tube section, for example in the form of an elongated hole, in order to achieve the largest possible contact surface and thus the best possible thermal coupling between the tube section and the heat conducting plate.

In the case of the battery module according to the invention, each of the devices typically has one of the contact surfaces on two opposite sides of the heat conducting plate of this device, one of the energy stores being flatly adjacent to both of these contact surfaces. In this way, a particularly compact design of the battery module and, at the same time, a particularly good thermal coupling between the medium and the energy stores are achieved.

The heat conducting plate and the pipe are typically made of a metal. In principle, however, these components can also be made from other materials that are as thermally conductive as possible. In addition, the heat conducting plate and / or the pipe can have coatings which can be provided by a heat transfer compound, a solder or an adhesive and / or a sealing compound.

• - kompakte, flache Bauweise
• - sehr einfache Bauteile
• - sehr einfacher Aufbau und Produktion
• - Kühlkanal kann platzsparend im Bereich bzw. entlang eines äußeren umlaufenden Randes des Energiespeichers verlaufen. Dieser Rand kann bspw. eine Siegelnaht sein, wie etwa im Fall eines als sogenannte Pouchzelle (auch Coffee-bag Zelle genannt) ausgestalteten Energiespeichers.
• - sichere Abdichtung auch eines flüssigen Mediums
• - geringes Gewicht
• - sehr gute Skalierbarkeit in verschiedenen Richtungen und leichte Skalierbarkeit des Durchflusses des Mediums durch das Rohr
• - Kurze Entfernung von der Mitte des Energiespeichers (Zellmitte) zum Rohr (Kühlkanal)
• - eine eben und möglichst große Kontaktfläche, insbesondere zum Verkleben der Energiespeicher mit dem Wärmeleitblech
• - Ausprägung des Wärmeleitblechs als Zellaufnahme zur Positionierung von mindestens einem Energiespeicher
• - Aufnahme für das Kühlrohr durch eine das Rohr mechanisch fixierende Ausformung des Randbereichs des Wärmeleitblechs und/oder durch Löten, Schweißen, Quetschen, Kleben etc.
• - Ausprägung (Verbreiterungen am Randbereich) zum Verbinden von mehreren Wärmeleitblechen innerhalb eines Batteriemoduls, bspw. durch Ineinanderstecken der Wärmeleitbleche. Zusätzlich oder alternativ können die Wärmeleitbleche auch miteinander verbunden werden durch Schweißen, Löten, Kleben, Klemmen etc.

For the sake of clarity, the most important advantages and functions of the device and the battery module and the further developments and special embodiments described here are mentioned here:

• - compact, flat design
• - very simple components
• - very simple construction and production
• - The cooling channel can run in the area or along an outer circumferential edge of the energy store in a space-saving manner. This edge can, for example, be a sealed seam, such as in the case of an energy store designed as a so-called pouch cell (also called a coffee-bag cell).
• - secure sealing of a liquid medium too
• - light weight
• - Very good scalability in different directions and easy scalability of the flow of the medium through the pipe
• - Short distance from the center of the energy storage device (cell center) to the pipe (cooling channel)
• - A flat and as large as possible contact surface, in particular for gluing the energy store to the heat conducting sheet
• - Formation of the heat conducting sheet as a cell receptacle for positioning at least one energy store
• - Receptacle for the cooling tube through a molding of the edge area of the heat conducting plate that mechanically fixes the tube and / or through soldering, welding, squeezing, gluing, etc.
• - Characterization (widening at the edge area) for connecting several heat conducting plates within a battery module, for example by plugging the heat conducting plates into one another. Additionally or alternatively, the heat conducting sheets can also be connected to one another by welding, soldering, gluing, clamping, etc.

• 1 eine perspektivische Darstellung einer Vorrichtung hier vorgeschlagener Art zum Temperieren von Energiespeichern,
• 2 die in 1 gezeigte Vorrichtung in einer Explosionsdarstellung,
• 3 eine Draufsicht auf einen vergrößerten Ausschnitt der in 1 und 2 gezeigten Vorrichtung,
• 4 und 5 perspektivische Darstellungen der in 1 bis 3 gezeigten Vorrichtung mit zwei Energiespeichern,
• 6 eine Teilansicht auf einen Querschnitt durch die in 5 gezeigte Anordnung,
• 7 eine Explosionsdarstellung eines Batteriemoduls hier vorgeschlagener Art, umfassend mehrere Vorrichtungen gemäß 1 bis 6 und mehreren Energiespeichern.

In the following, the invention is illustrated with reference to in 1 to 7th schematically illustrated special embodiments explained in more detail. It shows:

• 1 a perspective view of a device of the type proposed here for controlling the temperature of energy stores,
• 2 in the 1 shown device in an exploded view,
• 3 a plan view of an enlarged section of the in 1 and 2 device shown,
• 4th and 5 perspective representations of the in 1 to 3 shown device with two energy stores,
• 6 a partial view of a cross section through the in 5 arrangement shown,
• 7th an exploded view of a battery module of the type proposed here, comprising several devices according to 1 to 6 and several energy stores.

In 1 is a special embodiment of a device 1 The type proposed here for temperature control, that is to say for cooling and / or heating, one or more energy stores. The energy stores of the type mentioned at the beginning or the specific examples at the beginning, in particular energy stores for storing the drive energy of hybrid and / or electric vehicles, come into consideration as energy stores.

The device comprises a heat conducting plate 2 , which can also be referred to as a cooling fin and which is given in this embodiment as a stamped and bent part made of aluminum, copper or some other metal. The heat conducting sheet 2 has on a front side and on a back side of the heat conducting sheet 2 each have a flat contact surface 3 on, which are coated with an adhesive layer and with an HV-insulating thermal compound (not shown). About these contact areas 3 can the heat conducting sheet 2 are connected in a thermally conductive manner to one of the aforementioned energy stores on the front and the back, compare 4th to 6 . The contact areas 3 are designed to be as large as possible in order to achieve the best possible heat transfer between the energy store and the heat conducting plate 2 to enable.

The device 1 also includes a tube 4th , which is given in this embodiment by a copper pipe. Alternatively, other metals or other materials, such as plastics, can also be used for the pipe 4th in question. Preferably, however, for the heat conducting plate 2 and the pipe 4th If possible, thermally conductive materials are used. The pipe 4th is designed to convey a fluid medium, i.e. a liquid or a gas. For such a medium, for example, air, CO ₂ , water, glycol or another substance that can flow is possible. The function of the medium is from the energy store to the heat conducting sheet 2 absorb and transport away thermal energy in order to cool the energy storage in this way. If necessary, it is also possible to use the medium to introduce thermal energy into the device 1 to be transported and transferred to the energy storage system. As a rule, however, when the energy store is in operation, for example when supplying energy to a drive of an electrode or hybrid vehicle, it is typically much more frequently necessary to cool the energy store than to heat it.

In 2 is the in 1 The device shown is shown again in an exploded view. It can be seen here that the heat conducting plate 2 outside the contact area 3 one the contact area 3 laterally circumferential edge area 5 having. The pipe 4th has a pipe section 6 on, which is parallel to the contact surfaces 3 and along this edge area 5 runs. In this course along the edge area 5 is this pipe section 6 also flat on the edge area 5 and touches the edge area in this process 5 flat with one of the edge areas 5 facing outer surface of the pipe section.

In the embodiment shown, the edge area 5 at corners of the heat conducting plate 2 Gaps 7th on. These gaps 7th are parallel to the contact surface through the pipe section along a direct and as short a path as possible 3 bridged. The pipe section runs outside these gaps 6 however, continuously and continuously along the edge area 5 and lies continuously and consistently on the edge area 4th on.

The edge area 5 and thus also the pipe 4th are completely outside the contact areas 3 arranged. In this way, as shown below with 4th to 7th is explained in more detail, enables a spatially very compact structure of the device. At the same time, there is a very effective heat transfer between the medium carried in the pipe and the two on the contact surfaces 3 adjacent energy storage made possible by the pipe section 6 the contact surfaces 3 runs almost completely all around.

To this end, the pipe section 6 several (in this embodiment 4th ) Subsections 8th , 9 on that along the edge area 5 are bent. Three of these curved sections 8th are along a common direction of rotation around the contact surfaces 3 bent and each have an angle of curvature of about 90 °. The total sum of these angles of curvature is therefore 270 °, so that the pipe section 6 the sub-areas 3 runs almost completely all around. The fourth curved section 9 also has an angle of curvature of 90 °, but is bent opposite to the direction of rotation mentioned above. Because it is directly at one of the two ends of the pipe 4th is arranged, there is only a small gap between the two pipe ends of the pipe 4th , compare to this 3 . Except for the sections bent in the same direction of rotation 8th consists of the pipe section 6 from straight sections 10 showing the curved sections 8th connect with each other.

At a first end of the pipe 4th the pipe has a flow connection 11 on to connect the pipe 4th to a feed line (not shown here) for feeding the medium into the pipe 4th . At a second end of the pipe 4th the pipe also has a return port 12 on to connect the pipe 4th to a return line (also not shown here) for returning the medium from the pipe 4th . The pipe section 6 connects the flow connection 11 throughout and continuously with the return connection 12 .

As also in 3 is shown, the named connections protrude 11 , 12 self-supporting over the heat conducting plate 2 out, so stand from the heat conducting plate 2 and the edge area 5 unsupported. Starting from the flow connection 11 the pipe hugs itself 4th in a first contact point 13 (in 3 marked by a cross) between the pipe 4th and the heat baffle 2 to the edge area 5 on and goes in this first contact point 13 in said pipe section 6 about. In addition, the pipe hugs itself 4th starting from the return connection 12 to the edge area 5 in a final contact point 14th (also represented by a cross) between the pipe 4th and the heat baffle 2 and goes into this last contact point 14th in said pipe section 6 about. The distance d between the first contact point 13 and the last contact point 14th in this exemplary embodiment is less than four times the maximum outer diameter of the pipe section 6 . In addition, it is less than 10% of a maximum diameter D (cf. 2 ) and less than 2 cm. Due to the small distance d, the contact area 3 so almost completely revolve around, so that a particularly good thermal coupling between the one in the pipe 4th guided medium and the heat conducting plate 2 is achieved. In many cases, however, it is also possible with the pipe section already running in a U-shape 6 around the contact area 3 to achieve sufficient thermal coupling.

For the largest possible contact areas 3 to achieve, the edge area 5 the smallest possible width and runs the pipe section 6 as far outside as possible. As in 2 is shown, this width becomes B of the edge area 5 parallel to the contact surface 3 and perpendicular to the course of the pipe section 6 at the relevant point in the edge area 5 measured. In the exemplary embodiment shown, the width B of the edge area is 5 at no point larger, ie everywhere smaller than twice the maximum outside diameter of the pipe section, smaller than 5% of the length L of a longitudinal side of the heat conducting sheet 2 and smaller than 2 cm.

The one on the outer surface of the edge area 5 flat outer surface of the pipe section 6 and the edge area 5 are firmly connected to each other, in this example by gluing. This cohesive connection could just as well also be achieved by soldering or welding the named outer surface of the pipe section 6 with the border area 5 getting produced. Alternatively, however, it would also be possible for the connection between the pipe section and the edge area to be established by clamping, pressing or squeezing. During the manufacture of the device shown here 1 the pipe section is thus with the edge area 5 connected in a corresponding manner, in this case by gluing, in alternative examples by soldering, welding, clamping, pressing or squeezing.

In 4th and 5 is the device 1 together with two energy stores 15th shown. In the present example, these energy storage devices are lithium-ion flat cells. However, it could also be other energy stores, for example energy stores of the type mentioned at the beginning or the examples mentioned at the beginning.

In 4th is only one of the two energy stores flat with one of the contact surfaces 3 connected to the device, while in 5 both energy stores 15th each with one of the contact surfaces 3 are connected. One is the energy store 15th with the contact surface 3 connected to the front of the heat conducting sheet and the other energy storage 15th with the contact surface 3 on the back of the heat conducting sheet 2 connected.

This means that the pipe along the edge area 5 outside of these contact areas 3 runs, the tube in particular does not run between the contact surfaces 3 and the one on the contact surfaces 3 adjacent exterior surfaces 16 the energy storage 15th . In this way the device allows 1 also in a direction perpendicular to the contact surfaces 3 spatially particularly compact arrangement of the energy storage 15th to the device 1 . This fact is also supported by the in 6 shown cross section through this arrangement of the device 1 and the energy storage 15th shown.

In 6 it can also be clearly seen that the edge areas 5 Widenings aligned perpendicular to the contact surfaces 17th exhibit. The widenings 17th are made by reshaping or bending the heat conducting sheet 2 in the edge area 5 been made. In addition, in 6 to see that also the two contact surfaces 3 are designed flat and that also the edge area 5 by bending over the heat conducting sheet 2 towards these contact surfaces 3 has been offset in parallel in order to achieve a space-saving arrangement of the pipe section 6 between the energy stores 15th or between outer edges (sealed seams) 18th the energy storage 15th to enable. At the same time, this results in a better fixation of the energy store 15th by lateral framing and edging by means of the edge area 5 achieved. The pipe 4th has, at least in the pipe section 6 , an elongated cross-section in the form of an elongated hole in order in this way as large a contact area as possible between the pipe section 6 and the heat baffle 2 to achieve.

In 7th is a special battery module 19th The type proposed here is shown schematically in an exploded view. This battery module 19th includes several of the preceding 1 to 6 device shown 1 as well as several of the energy stores 15th . The devices are arranged one behind the other in a row-like sequence, so that the contact surfaces 3 the heat conducting plates 2 of the devices 1 are each aligned parallel to one another. With each of these contact areas 3 is exactly one of the energy stores 15th thermally connected by the respective energy storage 15th with one of its outer surfaces 16 each flat to one of the contact surfaces 3 adjoins. Here are the energy stores 15th each with the contact surfaces 3 glued. Also is between the contact surfaces 3 and the exterior surfaces 16 each of the energy storage devices has an HV-insulating heat-conducting layer (not shown here).

The widenings 17th are designed in such a way that they are connected to one another via locking elements 20th , 21st of the broadening, compare 6 , can be mechanically connected. In addition, these can be widened 17th can also be materially connected to one another, for example by gluing, welding and / or soldering. The widenings 17th are also designed, lateral outer walls 22nd of the battery module 19th to train. The battery module shown is due to the arrangement of the tubes described here 4th of the individual devices 1 spatially particularly compact, as the pipe sections described above 6 of the pipes 4th each along the edge areas 5 the heat conducting plates 2 outside the contact areas 3 run and the described contact surfaces 3 run around sideways. The energy storage 15th have a cathodic and an anodic contact element 23 and are in this embodiment via these contact elements 23 connected in series. In addition, the devices stand out 1 each characterized by a very simple structure and inexpensive production, since the heat conducting plates 2 and the pipes 4th are very simple components. In addition, through the flow connections 11 and return connections 12 a secure sealing of the pipes 4th achieved and thus reliably avoided leakage of the fluid medium. In addition, the device is characterized by a very low weight and very good scalability in all spatial directions. The device is also relevant to the flow of the medium through the pipe (scalability of the inner diameter of the pipe) 1 and the battery module can be very easily adapted to given requirements, for example to a specific electric or hybrid vehicle.

Claims (12)

Battery module (19) with several devices (1) for temperature control of at least one energy store, and with several energy stores (15), each of the energy stores (15) flatly adjoining at least one of the contact surfaces (3) of the devices (1), each device ( 1) for tempering at least one energy store, each comprising a heat conducting plate (2) which can be connected in a thermally conductive manner to an outer surface of the energy store (15) via at least one contact surface (3) of the heat conducting plate (2), the device (1) also being a tube (4) for conducting a fluid medium, the tube (4) being connected to the heat-conducting sheet (2) in a thermally conductive manner, the heat-conducting sheet (2) having an edge region (5) outside the at least one contact surface (3), the tube (4) comprises a pipe section (6) which has a course along the edge region (5), the pipe section (6) in this course along the edge region (5) on the edge region (5) a ufies, characterized in that the heat conducting plates (2) of the devices (1) are arranged one behind the other in a row-like sequence, the edge areas (5) of the heat conducting plates (2) being widened on at least two opposite sides of the respective heat conducting plate (2) ), the widenings (17) being designed to form one or more outer walls (22) of the battery module (19) with one another in the aforementioned row-like sequence, and the widenings (17) by forming and / or bending over the heat-conducting sheet (2) in the edge region (5) are formed. Battery module (19) Claim 1 , characterized in that an outer surface of the pipe section (6) lying flat against the edge region (5) is connected to the edge region (5) in a materially bonded manner, preferably by gluing, soldering or welding. Battery module (19) according to one of the preceding claims, characterized in that an outer surface of the pipe section (6) lying flat against the edge region (5) is connected to the edge region by clamping, pressing or squeezing. Battery module (19) according to one of the preceding claims, characterized in that the edge region (5) has a width which is smaller than - three times the maximum outer diameter of the pipe section (6), - 10% of the length (L) of a longitudinal side of the Heat conducting plate (2) or - 3 cm. Battery module (19) according to one of the preceding claims, characterized in that the pipe section (6) has partial sections (8, 9) in the said course which are bent along the edge region (5). Battery module (19) Claim 5 , characterized in that the bent partial sections (8, 9) are bent along a common direction of rotation around the contact surface (3). Battery module (19) according to one of the Claims 5 or 6 , characterized in that each of the curved subsections (8) has an angle of curvature, a total of the angles of curvature being at least 170 ° or at least 260 °. Battery module (19) according to one of the Claims 5 to 7th , characterized in that the pipe section (6) has straight subsections (10) in said course, the straight subsections (10) being connected to one another by the curved subsections (8). Battery module (19) according to one of the preceding claims, characterized in that the pipe (4) has a flow connection (11) at a first end of the pipe for connecting the pipe to a feed line for feeding the medium into the pipe, the pipe ( 4) has a return connection (12) at a second end of the pipe for connecting the pipe to a return line for returning the medium from the pipe, the pipe section (6) connecting the flow connection (11) to the return connection (12). Battery module (19) Claim 9 , characterized in that the flow connection (11) and the return connection (12) protrude in a cantilevered manner from the edge region (5) of the heat deflector (2), the pipe (4) starting from the flow connection (11) being in a first contact point (13 ) clings to the edge area (5) and merges into the named pipe section (6) at this contact point (13), the pipe (4) also starting from the return connection (12) extends to the edge area (5) in a last contact point ( 14) and merges from this last contact point (14) into said pipe section (6), a distance (d) between the first contact point (13) and the last contact point (14) being less than - five times the maximum outer diameter of the pipe section (6), - 15% of a maximum diameter (D) of the contact surface (3) or - 3 cm. Battery module (19) according to one of the preceding claims, characterized in that each of the devices (1) has one of the contact surfaces (3) on two opposite sides of the heat conducting plate (2) of this device (1), both of these contact surfaces ( 3) in each case one of the energy stores (15) is flatly adjacent. Battery module (19) according to one of the preceding claims, characterized in that the contact surfaces (3) of the heat conducting plates (2) of the devices (1) are aligned parallel to one another in the row-like sequence and that the widenings (17) of the edge areas (5) are perpendicular are aligned with the contact surfaces (3).

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