• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a battery module (100) having at least one, preferably a plurality of battery cells (101), which are formed substantially plate-like and of a foam structure (110) to give, wherein the foam structure (110) has at least one predetermined breaking point.
    公开号:AT515312A4
    申请号:T50054/2014
    申请日:2014-01-28
    公开日:2015-08-15
    发明作者:Harald Dipl Ing Fh Stütz；Michael Ing Körösi；Markus Ing Kores；Dietmar Niederl；Martin Dipl Ing Fh Michelitsch；Theo Volck；David Fink
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a battery module with at least one, preferably a plurality of battery cells, which are formed substantially plate-like and surrounded by a foam structure.
    In batteries, which are used in particular in vehicles, for example, for their drive, it is necessary to protect the usually sensitive battery cells from mechanical damage. Thus, EP 0 631 338 A1 describes a battery having a battery housing, in which a plurality of battery cells are accommodated, wherein the battery housing is made of a plastic foam structure.
    In US 2007/259258 Al a battery assembly is described, which also consists of a plurality of battery modules with individual cells, each battery module is foamed in the housing.
    In the case of a defect of one or more battery cells in a battery module or a battery, there may be an escape of gaseous substances, which can usually escape via a vent valve in the housing of the battery. An escape of these gases is necessary to avoid the formation of an overpressure and thus an uncontrolled bursting of the battery case. EP 1 717 884 B1 discloses a vent valve for acid batteries for this purpose. However, in the case of foamed-in battery cells, such valves can not be used or can only be used in the area of the battery housing itself, while the foam structure around the battery cell can continue to rupture in an uncontrolled manner.
    It is therefore an object of the invention to provide an improved battery structure with foamed battery cells available, which allows a controlled release of excess pressure from the battery.
    This object is achieved in that the foam structure has at least one predetermined breaking point. About this predetermined breaking point, which is preferably designed as a material dilution in the foam structure can be drained in a controlled manner escaping gas or pressure in case of malfunction and / or a defect at least one or more battery cells in the environment, without the entire foam structure their function, namely the protection of at least one battery cell from mechanical damage loses. Another advantage of the controlled discharge is that the predetermined breaking point can be mounted at a location where the outflowing gas can cause no further damage to the environment, or the gas can be removed for example via a collecting channel.
    In a particularly preferred embodiment of the invention, the material dilution in the foam structure is arranged in the region of, or between two cell contacts of at least one battery cell. Prismatic cells often have a predetermined breaking point in this area, at which the gas possibly escapes from the cell interior. If the predetermined breaking point of the cell is arranged elsewhere, it may be expedient to also position the material dilution in the foam structure in this area away from the cell contacts. The cell contacts of the at least one battery cell usually protrude into the region of a housing cover of the battery housing, where also usually venting devices, such as venting membranes, venting channels or valves are arranged. Thus, a possible overpressure can be derived in a controlled manner from the battery housing in a controlled manner. If, according to the invention, there is no separate housing, that is to say that the outer boundary of the battery module is likewise a foam layer, the predetermined breaking point in this foam layer must be positioned at a point in the vehicle at which safe degassing is possible.
    Furthermore, it is preferably provided that different internals, in particular cooling lines, heat conducting plates, electrical lines, electrical and mechanical connection elements, sensors and / or control elements are arranged in the foam structure. Thus, these internals are also enveloped by the foam structure and protected against mechanical stress.
    The operation of battery modules often requires a temperature control of the at least one battery cell, this temperature control may include both heating and cooling the environment of the battery cell. In a further embodiment of the invention, it is therefore provided that the foam structure has at least one channel with a channel wall, and that at least one predetermined breaking point is arranged in the region of the channel wall. In this case, the channel serves to receive a temperature control element, for example a cooling line. If, for example, this cooling line is defective, leaking cooling liquid can be discharged in a controlled manner from the channel in the foam structure. The drainage channel can arise during the foaming process of a unit or be formed, for example, by the assembly of several foam parts.
    In a further embodiment of the invention it is provided that the foam structure has at least two foam layers with different mechanical, physical and / or chemical properties. Thus, for example, in a first embodiment of the invention, the foam structure has a first foam layer, which encloses at least one battery cell in its entirety, and preferably has fire-retardant properties. This fire-retarding property can be achieved, for example, by replacing the blowing agent necessary for producing the foam structure during foaming of the battery cell by a fire-retardant gas or by an inert gas. Likewise, the foaming of the battery cells under a protective gas atmosphere prevents air pockets, which can have a fire-supporting effect in the event of a malfunction. Alternatively, it can be provided that the first foam layer is designed such that it releases a protective gas or other fire-retardant substances in case of fire.
    In a further embodiment of the invention, a layer is provided as the second foam layer, which optionally has a higher density than the first foam layer, and is preferably designed as a load-bearing layer for different installations. This second foam layer, which usually also has a greater thickness than the first foam layer, is characterized in particular by its mechanical stability, which allows the inclusion of different internals.
    Often, the temperature management of foamed-in battery modules, especially in multi-layer structures, is a challenge to prevent the battery cells from overheating during operation and in particular catching fire. It is therefore provided in a further embodiment of the invention that between the first foam layer and the second foam layer another, third
    Foam layer is arranged, which allows a better heat transfer between these two foam layers.
    In a further embodiment of the invention, an additional outer fourth layer is connected, which serves the EMC protection, and preferably has a vapor barrier.
    In a particularly preferred embodiment of the invention, the at least two foam layers are arranged separable from each other around the at least one battery cell. Due to the separability of the at least two foam layers from one another or from individual cells, in particular when recycling the battery module according to the invention, a simpler separation of the individual components can take place. This separability is for example designed such that a ripcord is integrated with at least one exposed eyelet in the foam structure. If the foam layer is to be removed, the closed foam structure is torn in half by means of the ripcord, and the resulting parts can then be lifted off. Likewise, markings may be provided at locations where mechanical processing to separate the foam structure is safely possible.
    If a plurality of foam layers are arranged around the at least one battery cell, it can be provided for better connection of the individual layers that the at least one first foam layer has an at least partially structured surface that is complementary to an at least partially structured surface of the adjacent second foam layer. These structured surfaces can be designed here in particular as toothings. If the toothing geometry is formed only in one direction, for example in the z-axis, the individual layers can be separated from one another again by displacement relative to one another in this direction.
    Combinations of toothing and ripcord can be provided.
    The invention will be explained in more detail below with reference to non-limiting exemplary embodiments with associated figures. Show in it
    Figs. 1 and 2 a first embodiment of the invention in a sectional view and
    3 and 4 are detail views of a second embodiment of the invention, and
    Fig. 5a, 5b, 5c an integrated ripcord for separating the foam structure.
    FIGS. 1 and 2 show a battery module 100 according to the invention, wherein a foam structure 110 encloses a substantially prismatic battery cell 101 with a cell contact 102.
    The foam structure 110 has, in the region of the cell contact 102, a material thinner 111 with a smaller wall thickness d than the remaining foam structure 110.
    If a defect 103 now occurs at the battery cell 101, during which degassing occurs, the material dilution 111 forms a predetermined breaking point, which tears open due to the resulting overpressure (FIG. 2). In this case, the escaping gas is passed into a channel 112 and then discharged from the battery housing, for example via an overpressure device such as a vent valve (not shown).
    FIGS. 3 and 4 again show a detailed view of a battery cell 101 with a surrounding foam structure 110, wherein a coolant line 120 extends within the foam structure 110. If now this coolant line 120 is defective, and a coolant 121 exits through the defect 103, it is discharged via the channel 112 and discharged at a suitable location outside the battery module 100 or the battery.
    FIG. 5 shows, in a schematic illustration, a ripcord 130 which is embedded in the foam structure 110 (FIG. 5a). By pulling the ripcord 130 (Figure 5b), the foam structure 110 is divided into two parts (Figure 5c), which can be removed in sequence.
    It is understood that the present invention is not limited to the embodiments described above. In particular, the number and arrangement of the at least one predetermined breaking point in the foam structure can be designed differently.
    权利要求:
    Claims (13)
    [1]
    PATENT CLAIMS 1. Battery module (100) with at least one, preferably a plurality of battery cells (101) formed substantially plate-like and surrounded by a foam structure (110), characterized in that the foam structure (110) has at least one predetermined breaking point.
    [2]
    2. Battery module (100) according to claim 1, characterized in that the foam structure (110) is formed at least one predetermined breaking point as a material dilution (111) in the foam structure (110).
    [3]
    3. Battery module (100) according to claim 1 or 2, characterized in that the material dilution (111) in the foam structure (110) in the region of at least one cell contact (102) at least one battery cell (101) is arranged.
    [4]
    4. Battery module (100) according to any one of claims 1 to 3, characterized in that in the foam structure (110) different internals, in particular cooling lines, Wärmeleitbleche, electrical lines, electrical and mechanical connection elements, sensors and / or control elements are arranged.
    [5]
    5. Battery module (100) one of claims 1 to 4, characterized in that the foam structure (110) has at least one channel (102) with a channel wall, and which is arranged at least one predetermined breaking point in the region of the channel wall.
    [6]
    6. Battery module (100) according to any one of claims 1 to 5, characterized in that the foam structure (110) has at least two foam layers with different mechanical, physical and / or chemical properties.
    [7]
    7. Battery module (100) according to any one of claims 1 to 6, characterized in that the foam structure (110) has a first foam layer which encloses at least one battery cell (101) wholly, and preferably has fire-retardant properties.
    [8]
    8. Battery module (100) according to one of claims 1 to 7, characterized in that the foam structure (110) comprises a second foam layer, which is preferably formed as a supporting layer for different installations.
    [9]
    9. battery module (100) according to one of claims 1 to 8, characterized in that between the first foam layer and the second foam layer, a further foam layer is arranged, which serves a better heat transfer.
    [10]
    10. Battery module (100) according to any one of claims 1 to 9, characterized in that in addition an outer layer connects to the second foam layer, which serves the EMC protection, and preferably has a vapor barrier.
    [11]
    11. Battery module (100) according to any one of claims 6 to 11, characterized in that the at least two foam layers are arranged separable from each other around the at least one battery cell (101).
    [12]
    12. Battery module (100) according to claim 11, characterized in that a ripcord (130) is integrated with at least one exposed eyelet in the foam structure (110).
    [13]
    13. Battery module (100) according to any one of claims 6 to 13, characterized in that the at least one first foam layer has an at least partially structured surface which is complementary to an at least partially structured surface of the adjacent second foam layer. 2014 01 28 Ha / Bt
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    同族专利:
    公开号 | 公开日
    CN106233495B|2020-07-03|
    WO2015113946A1|2015-08-06|
    CN106233495A|2016-12-14|
    AT515312B1|2015-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20070259258A1|2006-05-04|2007-11-08|Derrick Scott Buck|Battery assembly with temperature control device|
    EP2685527A1|2011-05-23|2014-01-15|LG Chem, Ltd.|Battery pack having improved safety|
    WO2013072468A2|2011-11-16|2013-05-23|Johnson Controls Advanced Power Solutions Gmbh|Pressure relief element, pressure relief device and battery|DE102018132292A1|2018-12-14|2020-06-18|Webasto SE|Battery case for a motor vehicle|JP2794838B2|1989-10-12|1998-09-10|松下電器産業株式会社|Package type battery|
    JPH03134952A|1989-10-19|1991-06-07|Matsushita Electric Ind Co Ltd|Package type cell|
    DE202005010708U1|2005-07-06|2005-09-08|FRÖTEK Kunststofftechnik GmbH|Housing for accumulator batteries e.g. a starter battery has foam structure and integrated outer and dividing walls|
    DE102007063174B4|2007-12-20|2010-02-25|Daimler Ag|Battery with several parallel and / or serially interconnected single cells and a heat conducting plate for temperature control of the battery and use of the battery|
    US9231237B2|2010-08-06|2016-01-05|Panasonic Intellectual Property Management Co., Ltd.|Cell module|
    JP2013026090A|2011-07-23|2013-02-04|Toyota Industries Corp|Battery pack|DE102016224277A1|2016-12-06|2018-06-07|Audi Ag|Battery for a motor vehicle and motor vehicle|
    DE102019125013A1|2019-09-17|2021-03-18|Bayerische Motoren Werke Aktiengesellschaft|Battery module with module frame, traction battery and motor vehicle|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50054/2014A|AT515312B1|2014-01-28|2014-01-28|battery module|ATA50054/2014A| AT515312B1|2014-01-28|2014-01-28|battery module|
    PCT/EP2015/051542| WO2015113946A1|2014-01-28|2015-01-27|Battery module|
    CN201580006149.3A| CN106233495B|2014-01-28|2015-01-27|Battery module|
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