• 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:
    A device is used for separating the electrical connection to a battery cell (1) in the event of outgassing, the cell pole (3) on the outgassing valve side being connected to an electrical contact point (5) at a connection point (4) via a connection conductor (2) forming a fuse described. In order to create a device of this type which, with low component requirements and a compact design, enables reliable electrical and thermal load protection of neighboring cells of an outgassing battery cell and prevents the spread of thermal runaway, it is proposed that between the connection point (4) and the contact point (5) a spacer (6) which electrically isolates the connection point (4) from the contact point (5) and retains the cell pole (3) is provided in the event of outgassing.
    公开号:AT522585A4
    申请号:T51091/2019
    申请日:2019-12-13
    公开日:2020-12-15
    发明作者:Weglehner-Pilgerstorfer Ignaz；Kreisel Philipp；Kastler Helmut；Haider Lukas；Riegler Manuel；Leitner Christian；Dobusch Peter；Waldschütz Gerhard
    申请人:Kreisel Electric Gmbh & Co Kg；
    IPC主号:
    专利说明:

    The invention relates to a device for separating the electrical connection to a battery cell in the event of outgassing, the cell pole on the outgassing valve side at a connection point via a connection conductor forming a fuse with an electrical contact point
    connected is.
    Battery cell defects, which can be traced back to individual damaged cells, for example, are regularly accompanied by an uncontrolled escape of hot gas, which in turn can set in motion a self-reinforcing, heat-producing chain reaction known as "thermal runaway". In order in such a case, on the one hand, to electrically detach the battery cell concerned from a cell assembly and, on the other hand, to protect surrounding battery cells from the escaping hot gas, contacting devices with two receiving bodies for battery cell end sections opposite one another with respect to a passage opening have already been proposed, with a connection conductor passing through the passage opening being provided over which the cell pole of a battery cell on the degassing valve side is connected to an electrical contact point. The line cross-section of the connection conductor is selected so that it is melted through by an overcurrent occurring in the event of a fault or by the escaping hot gas and thus the electrical connection is separated. In order to protect adjacent battery cells from thermal damage, a ceramic flame retardant plate can be inserted into the receiving body for the battery cell to be protected, so that the receiving body is in that receiving body
    The battery cell used is thermally insulated from the hot gas or in the worst case
    Can no longer fulfill the function.
    It has also been shown in this context that in the event of a cell defect and the associated increase in pressure within the battery cell concerned, not only does hot gas usually escape, but that the electrode coil of the battery cell also detaches the pole cap on the degassing valve side due to pressure and leaves the battery cell through the Passage opening of the contacting device can exit through. This subsequently harbors the risk of a short circuit between the then exposed electrode coil and the neighboring cell, which has already been electrically separated as a result of the fuse, so that the heat development resulting from the short circuit increases again
    a spread of the "thermal runaway" to adjacent battery cells.
    The invention is therefore based on the object of creating a device of the type described above which, with low component requirements and a compact design, enables reliable electrical and thermal load protection of neighboring cells of an outgassing battery cell and allows for the spread
    a thermal runaway.
    The invention achieves the stated problem in that a spacer is provided between the connection point and the contact point which, in the event of outgassing, electrically isolates the connection point from the contact point and retains the cell pole. As a result of these features, in the event of outgassing, on the one hand the electrical connection of the defective battery cell to the contact point can be separated due to the melting of the connection conductor and, on the other hand, the spacer prevents the pole cap on the exhaust valve side from becoming detached from the battery cell, so that the electrode coil cannot emerge from this but in the defective battery cell is held back. The
    The spacer forms a stop for in particular in the longitudinal direction of the cell
    In order to facilitate the discharge of hot gas and thereby ensure separation of the electrical connection, the spacer, together with the connection conductor, can penetrate an outgassing channel extending between the electrical contact point and the cell pole on the outgassing valve side. In this way, the connection conductor is exposed to the escaping hot gas, which enables the connection conductor to melt through regardless of the electrical current intensity that occurs. Favorable conditions in terms of a compact design and reliable discharge of hot gas arise, for example, if the outgassing duct has a height of 2 to 10 mm,
    preferably from 3 to 6 mm.
    In the event of the connection conductor melting through, a spatial separation of the loosened parts can be ensured and a continuing electrical connection avoided if the connection conductor is materially connected to the cell pole on the degassing valve side and the electrical contact point and if the connection conductor moves from the contact point to the cell pole against a restoring force extends towards. For example, the connection conductor can be welded or soldered both to the cell pole on the outgassing side and to the contact point. With regard to the contact point, a material connection can also be understood to mean that, for example, the connection conductor and the contact point are formed in one piece, that is to say materially
    are connected to each other.
    In order to enable simple assembly and a compact design, the spacer can be inserted from the contact point into the space spanned by the connection conductor. In the case of a helical connection conductor, the spacer thus runs along the main helical axis formed by the helical shape of the connection conductor and thus penetrates the
    Envelope of the helix.
    So that the fuse is reliably triggered in this context regardless of the amount of hot gas escaping, it is recommended that the connection conductor is designed as a double helix. The fact that, as a result of these measures, the ratio of the free surface area of the connection conductor to its mass increases, further facilitates melting due to a hot gas escape. If the two conductor tracks of the double helix open opposite one another in a common connection point for the cell pole of a battery cell on the outgassing valve side, the associated self-centering of the connection point can facilitate a welding process for the material and electrical connection of the connection point to the cell pole of the battery cell on the outgassing side.
    prevent.
    In order to use the spacer, despite its compact design, to protect the area immediately adjacent to the contact point, in which, for example, an adjacent battery cell is located, from electrical and thermal stress and to simplify the assembly process, it is proposed that the spacer have a flame retardant base and has a retaining extension projecting from this flame retardant base in the direction of the cell pole on the degassing valve side. As a result, the spacer prevents hot gas from spreading with the aid of the flame retardant base and at the same time ensures, via the retaining extension, that there is sufficient free space between the outgassing valve and the flame retardant base for this hot gas to dissipate. Thus it can also be prevented that a protruding cell pole cap or an emerging electrode coil block the removal of hot gas. For example, the spacer can be a screen body with a disk-shaped flame retardant base and a cylindrical retaining extension. As a result of these features, the spacer can thus be designed as a one-piece component, which can preferably be designed to be rotationally symmetrical with respect to its longitudinal axis of the retaining extension. To simple manufacturing conditions
    Flow against the connection conductor so that it melts reliably.
    So that the effect of the spacer as thermal protection can be improved in this context while maintaining simple manufacturing conditions, it is recommended that the retaining extension has an insulation chamber. For example, the retention extension can form a cavity which acts as a thermal insulator and in the event of outgassing reduces the spread of the heat acting on the spacer. This
    The cavity can preferably be open towards the flame retardant base.
    In order to facilitate the connection with adjacent battery cells and to fix the device according to the invention spatially with respect to the battery cells with play, it is proposed that the contact point form a cell receptacle for a battery cell connected against a joining direction, the cell receptacle with the connection conductor being inserted into a base body and against the The joining direction is limited by the stop. The cell receptacle can be limited, for example, by a contact spring base from which contact tongues protrude against the joining direction for encompassing the battery cell to be received. However, as described above, the flame retardant base of the spacer can also be provided between the contact spring base and the cell receptacle. According to particularly favorable embodiments, the contact spring can be designed in one piece together with the connection conductor and the stop hook. The contact spring can be designed, for example, as a deep-drawn part that has previously been punched from a contact sheet. The
    In order to prevent damage to the connection point in this context, it is recommended that the base body form latching arms for circumferential engagement in a groove in the adjacent battery cell. As a result, the freedom of movement of the battery cell connected to the contact point via the connection conductor is restricted in the joining direction, whereby mechanical damage or even breakage of the connection conductor or the connection point is prevented. In addition, the assembly process is further improved because these measures enable a centered positioning of the cell pole on the degassing valve side in relation to the connection conductor and thereby facilitate a welding process.
    The subject of the invention is shown in the drawing, for example. Show it
    1 shows an exploded view of a device according to the invention and
    FIG. 2 shows a schematic sectional view of a device according to the invention in FIG
    Installation position in normal operation.
    A device according to the invention for separating the electrical connection to a battery cell 1 in the event of outgassing has a connection conductor 2 which forms a fuse and connects the cell pole 3 of the battery cell 1 on the outgassing valve side at a connection point 4 to an electrical contact point 5 in the form of a contact spring base. Between the connection point 4 and the contact point 5 there is provided a spacer 6 that electrically isolates the connection point 4 from the contact point 5 and retains the cell pole 3 in the event of outgassing. In the event of outgassing, the device according to the invention thus enables, on the one hand, the electrical connection of the defective battery cell 1 to the contact point 5 to be disconnected due to the melting of the connecting conductor 2, and, on the other hand, the spacer 6 prevents a
    Detachment of the pole cap 7 on the degassing valve side from the battery cell 1, so that
    As can be seen from the embodiment of a device according to the invention shown in FIG. 1 and FIG. 2, the contact point 5 can form a cell receptacle 8 for a battery cell 9 connected against a joining direction F, the cell receptacle 8 with the connection conductor 2 being inserted into a base body 10 and against the joining direction F via stop hook 11 is stop-limited. The base body 10 can also form latching arms 12 for circumferential engagement in a groove 13 of the adjacent battery cell 1. From the contact point 5 formed as a contact spring base, as shown in FIG. 1, contact tongues 14 can protrude against the joining direction F for encompassing the battery cell 9 to be received.
    In particular, it can be seen from FIG. 2 that the spacer 6, together with the connection conductor 2, can penetrate an outgassing channel 15 for the hot gas to be diverted that extends between the electrical contact point 5 and the cell pole 3 on the outgassing valve side. In the embodiment of the device according to the invention shown, the connection conductor 2 runs as a double helix around the spacer 6, the conductor tracks of the connection conductor 2 jointly opening into the connection point 4. The spacer 6 is inserted from the contact point 5 into the intermediate space 16 spanned by the connection conductor 2. The connection point 4 can preferably be materially connected to the cell pole 3, for example with the aid of a welding process.
    The spacer 6 can have a disk-shaped flame retardant base 17, preferably having the diameter of the battery cell, and a retaining extension 18 protruding from this flame retardant base 17 in the direction of the cell pole 3 on the degassing valve side. The spacer 6 can be inserted into the cell receptacle 8 in a simple manner and, for example, through
    the support edge of the contact point 5 in the joining direction F must be limited by a stop. Around
    To prevent outgassing.
    权利要求:
    Claims (10)
    [1]
    1. Device for disconnecting the electrical connection to a battery cell (1) in the event of outgassing, the cell pole (3) on the outgassing valve side being connected to an electrical contact point (5) at a connection point (4) via a connection conductor (2) forming a fuse, characterized in that a spacer (6) which electrically isolates the connection point (4) from the contact point (5) and retains the cell pole (3) is provided between the connection point (4) and the contact point (5).
    [2]
    2. Device according to claim 1, characterized in that the spacer (6) together with the connection conductor (2) passes through an outgassing channel (15) extending between the electrical contact point (5) and the cell pole (3) on the outgassing valve side.
    [3]
    3. Device one of claims 1 or 2, characterized in that
    the connection conductor (2) runs helically around the spacer (6).
    [4]
    4. Apparatus according to claim 3, characterized in that the connection conductor (2) is designed as a double helix.
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the spacer (6) is inserted from the contact point (5) into the intermediate space (16) spanned by the connection conductor (2).
    [6]
    6. Device according to one of claims 1 to 5, characterized in that the spacer (6) in normal operation from the degassing valve side
    [7]
    Cell pole (3) is spaced.
    [8]
    8. The device according to claim 7, characterized in that the
    Retaining extension (18) has an isolation chamber (20).
    [9]
    9. Device according to one of claims 1 to 8, characterized in that the contact point (5) forms a cell receptacle (8) for a battery cell (9) connected against a joining direction (F), the cell receptacle (8) with the connecting conductor ( 2) is inserted into a base body (10) and is limited against the joining direction (F).
    [10]
    10. The device according to claim 9, characterized in that the base body (10) locking arms (12) for circumferential engagement in a groove (13) of the
    adjacent battery cell (1) forms.
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    同族专利:
    公开号 | 公开日
    WO2021113891A1|2021-06-17|
    AT522585B1|2020-12-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2014022273A|2012-07-20|2014-02-03|Sanyo Electric Co Ltd|Laminate outer packaging battery and battery pack|
    US20150280205A1|2014-04-01|2015-10-01|Samsung Sdi Co., Ltd.|Secondary battery|
    EP3451410A1|2017-08-30|2019-03-06|Contemporary Amperex Technology Co., Limited|Cap assembly for a second battery and second battery|
    EP3573127A1|2018-05-25|2019-11-27|E-Seven Systems Technology Management Ltd|Arrangement for cells for storing electrical energy with spring contact element|
    KR101432459B1|2011-05-31|2014-08-20|파나소닉 주식회사|Fuse board and battery block equipped with same|
    PL3278381T3|2015-11-24|2019-04-30|Nordfels Gmbh|Busbar and battery module having such a busbar|
    JP6780385B2|2016-09-02|2020-11-04|トヨタ自動車株式会社|Busbar for batteries|AT523391B1|2020-03-30|2021-08-15|Kreisel Electric Gmbh & Co Kg|Device with a frame which has receptacles for the face end sections of battery cells which are aligned parallel with respect to their longitudinal axis|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA51091/2019A|AT522585B1|2019-12-13|2019-12-13|Device for separating the electrical connection to a battery cell in the event of outgassing|ATA51091/2019A| AT522585B1|2019-12-13|2019-12-13|Device for separating the electrical connection to a battery cell in the event of outgassing|
    PCT/AT2020/060442| WO2021113891A1|2019-12-13|2020-12-09|Device for breaking the electrical connection to a battery cell in the event of outgassing|
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