WO2011012197A1 - Battery having a plurality of single cells - Google Patents

Battery having a plurality of single cells Download PDF

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Publication number
WO2011012197A1
WO2011012197A1 PCT/EP2010/004033 EP2010004033W WO2011012197A1 WO 2011012197 A1 WO2011012197 A1 WO 2011012197A1 EP 2010004033 W EP2010004033 W EP 2010004033W WO 2011012197 A1 WO2011012197 A1 WO 2011012197A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
cell stack
characterized
cells
elastic
Prior art date
Application number
PCT/EP2010/004033
Other languages
German (de)
French (fr)
Inventor
Dirk Schröter
Jens Meintschel
Original Assignee
Daimler Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102009035460A priority Critical patent/DE102009035460A1/en
Priority to DE102009035460.3 priority
Application filed by Daimler Ag filed Critical Daimler Ag
Publication of WO2011012197A1 publication Critical patent/WO2011012197A1/en

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0202Cases, jackets or wrappings for small-sized cells or batteries, e.g. miniature battery or power cells, batteries or cells for portable equipment
    • H01M2/0207Flat-shaped cells or batteries of flat cells
    • H01M2/0212Flat-shaped cells or batteries of flat cells with plate-like or sheet-like terminals
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0413Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0413Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • H01M10/0418Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes with bipolar electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0468Compression means for stacks of electrodes and separators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0481Compression means other than compression means for stacks of electrodes and separators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0585Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/027Casing material forming terminal of the cell
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/0275Cases, jackets or wrappings characterised by the material of flexible envelopes or bags around open cell elements
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/14Separators; Membranes; Diaphragms; Spacing elements
    • H01M2/16Separators; Membranes; Diaphragms; Spacing elements characterised by the material
    • H01M2/1606Separators; Membranes; Diaphragms; Spacing elements characterised by the material comprising fibrous material
    • H01M2/162Organic fibrous material
    • H01M2/1626Natural fibres, e.g. cotton, cellulose
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/14Separators; Membranes; Diaphragms; Spacing elements
    • H01M2/16Separators; Membranes; Diaphragms; Spacing elements characterised by the material
    • H01M2/164Separators; Membranes; Diaphragms; Spacing elements characterised by the material comprising non-fibrous material
    • H01M2/1653Organic non-fibrous material
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00Primary cells; Manufacture thereof
    • H01M6/42Grouping of primary cells into batteries
    • H01M6/46Grouping of primary cells into batteries of flat cells
    • H01M6/48Grouping of primary cells into batteries of flat cells with bipolar electrodes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • Y02T10/7011Lithium ion battery

Abstract

The invention relates to a battery (1) having a plurality of single cells (2). The single cells of the battery are realized in a bipolar flat design. They are stacked in a cell stack (5) and are tightened by way of a tensioning means (10). According to the invention, an elastic, electrically insulating material (11) is arranged at least at one point in the cell stack (5) between two adjacent single cells (2). In an untightened or partially tightened state of the cell stack, said material is so thick that it electrically separates the two single cells from one another. In a tightened state of the cell stack (5), the material can be compressed such that the two single cells of the battery (2) make contact.

Description

 Battery with a large number of individual battery cells

The invention relates to a battery having a plurality of individual battery cells according to the closer defined in the preamble of claim 1.

Batteries, and in particular high-voltage batteries, as used for example in hybridized or partially hybridized powertrains in vehicles, usually consist of a plurality of battery cells, which are connected in series and / or in parallel. They typically form a common structure together with the associated electronics and cooling. By way of example, reference should be made to the unpublished German patent applications 10 2007 063 181 and 10 2007 063 179, which describes a structure of bipolar flat cells with frame. The two metallic cover plates of the battery individual cells are electrically separated from each other by an insulating frame. They also serve as a pole and as a heat conducting sheet. The heat is transmitted via appropriately thickened Hüllbleche to the outside and delivered to a cooling plate, which is traversed by an air-conditioning coolant or a separate coolant. For electrically insulating cladding sheets and metallic cooling plate, an electrically insulating heat-conducting foil is arranged between the stack of individual battery cells and the cooling plate. For electrical series connection, the cells are stacked on one another, wherein the corresponding cover plates used as poles electrically contact the individual battery cells. The stack of individual battery cells is then closed at its ends by pole plates and pressed over corresponding clamping means.

A disadvantage of such a structure is that the high voltage is already applied to the cell stack after touching the cladding sheets of the battery individual cells already in the loose assembly of the cells. In practice, this means that from this point on entire further assembly of the battery, taking into account appropriate

Safety regulations for higher voltages must be made. This includes, for example, special precautions such as protective equipment, specially trained personnel and the like. As a result, the cost of mounting such a battery is significantly increased.

The German patent DE 35 20 855 C1 therefore knows a galvanic cell with press-contacting, which consists of alternately arranged with the interposition of a separator electrode plates, and in which the Polbolzen the

Compress and contact the plate stack serve. Here, a comparatively complex structure of electrically conductive and electrically insulating sleeves is used around the pole bolts designed as screws, so that they contact the electrodes of a fiber material accordingly during assembly.

It is now the object of the present invention to improve a construction of flat, stacked individual battery cells in such a way that they are mounted quickly, easily and cost-effectively - and, if necessary, dismantled again.

According to the invention, this object is achieved by the in the characterizing part of

Claim 1 mentioned features solved.

The solution according to the invention, in which it is proposed to arrange elastic, electrically insulating materials between the individual battery cells at one or more points of the cell stack, is very simple in its construction. The elastic materials ensure that the uninsured or partially locked state, the battery cells are pressed apart accordingly, so that the electrical contact between the battery cells does not come off, or, for example, during disassembly, lost again. Only in a strained state, so if the battery cells with a corresponding predefined force

pressed against each other, the insulating and elastic materials are compressed so far that the battery individual cells in the areas adjacent to the elastic, electrically insulating materials according touch and thus the electrical contact is made. This structure makes it possible to stack the battery individual cells during assembly of the battery and to keep it in the unstressed or a partially locked state. In this construction phase there is no high voltage on the components of the battery. Therefore, can be dispensed with special measures during assembly, so that the assembly can be performed easily and inexpensively. Only in the final stage of assembly, the clamping means are clamped accordingly, so that the battery or the cell stack changes from its partially locked state to the clamped state. In this case, then the elastic, electrically insulating material is compressed so far that it leads to a contacting of the battery cells

with each other and thus to a contact of the entire structure comes.

Another particular advantage of the invention is that even with a disassembly of the battery, after the strained state has been transferred by loosening the clamping means in a partially braced or unstressed state, the elastic material expands so far that the battery individual cells separated again become. Then, for example, at a disassembly after relaxing the cell stack can be worked without appropriate protective measures due to the high voltage of the battery.

This feature also has another particularly important safety-related advantage. If an overpressure occurs in the interior of the cell, the tensioning means are stretched or possibly destroyed by this overpressure inside the cell. However, this drops the given voltage of the

Cell stack away or falls below a value that is characteristic of the strained state. A corresponding scenario in which the clamping means are stretched or separated accordingly, for example, in an accident and a corresponding deformation or damage to the battery occur, but especially if in one or some of the battery cells an overpressure - for example, due to malfunction - builds. In all these cases, the elastic electrically insulating materials will relax between the cells again, thereby eliminating the electrical contact between the cells. Thus, the battery can be brought in dangerous situations by their construction in a state in which there are no higher voltages to the battery. In a particularly favorable embodiment of the invention, it is provided that the number of points is selected with the elastic, electrically insulating material in the cell stack so that the group of lying between two bodies or a location and an end of the cell stack battery cells each one Has voltage which is below a predetermined limit.

This construction makes it possible to minimize the use of the elements of elastic electrically insulating material. Not every battery cell needs to have such an element. It is sufficient if, after some of the cells, such an element is arranged between the cells. In this way, groups of individual battery cells form between the ends of the battery and the locations with the elastic material or second locations with the elastic material. These groups of individual battery cells remain in the unstretched state after stacking

partially clamped state in electrical contact with each other. However, if the group is chosen so that its voltage is below a predetermined limit, it can be prevented that situations occur in which a voltage of

Total battery above the limit on the partially braced or unstrained battery occurs. The limit value can be chosen in particular such that it lies below a value which becomes dangerous for a person during the assembly or disassembly of the battery cell. For example, the limit can be settled at 42 V, so that the cell stack would be divided by the insulating materials in the unstrained or partially braced state to individual blocks, each with 42 V voltage.

The structure of the battery in this way therefore provides a particular advantage in the assembly and in particular in security-related problems in that the

Battery individual cells are at least in groups electrically separated from each other. If the clamping means are relaxed accordingly, plastically stretch or burst, can in the battery cells for cost or space reasons to appropriate safety measures, such as rupture discs or bursting areas, which allow bursting of the individual battery cells in them resulting overpressure and thus a defined opening in the event of damage , be waived.

Due to the construction according to the invention, the electrical contact of the battery single cell to the adjacent battery individual cells or adjacent groups of Battery individual cells interrupted and it can be dispensed with such safety technology, which in turn saves space and cost, or if they should be present, a second redundant security technology in the

implemented battery according to the invention.

In a particularly advantageous embodiment of the invention, the clamping means are designed as tie rods, which in a particularly favorable development over

Screw means are stretched.

Such tie rods, especially if they are stretched over screw means, have the advantage that by a corresponding tightening with a predetermined torque, as is often customary in the assembly of bolted components, a defined assembly in the partially braced and with further tightening on a second limit torque in the strained state of the cell stack is possible. In this case, it can be precisely defined from which tightening torque of the tie rod bolts the structure of the battery is braced during assembly and establishes an electrical contact between the individual cells or the groups of individual cells. Preferably, the cell stack can be preassembled in a partially clamped state, in order then to be installed in the battery case. Only after

Completion is in the battery case by the full suit of the

Tensioner bolts made to the predetermined torque of the tensioned state, and the battery individual cells or the groups of

Battery individual cells contacted electrically.

Further advantageous embodiments of the invention will become apparent from the remaining dependent claims and will be described with reference to the following

Embodiment clear, which is explained in more detail with reference to the figures.

Showing:

 Fig. 1 is a three-dimensional view of the battery according to the invention in the braced

Status;

 FIG. 2 shows a detail of the cell stack in a partially clamped state; FIG.

Fig. 3 is a partial enlargement of the illustration in Fig. 2;

4 shows a detail of the cell stack in a clamped state; Fig. 5 is a partial enlargement of the illustration in Fig. 4; and

Fig. 6 is a three-dimensional view of a single battery cell.

FIG. 1 shows a battery 1 according to the invention in one possible embodiment. The battery 1 should be designed in particular as a lithium-ion high-voltage battery, which is designed for use in hybrid or mild hybrid applications. It is thus used in vehicles which have a hybridized or partially hybridized powertrain and can be electrically or electrically driven to support or alternatively to the drive via an internal combustion engine.

The battery in the exemplary structure shown in Figure 1 consists of a plurality of single battery cells 2, of which only a few are provided with the reference numeral 2 here. The battery individual cells should be designed as bipolar flat cells, which consist of an insulating frame 3 and two electrically conductive cladding sheets 4. This construction of the individual battery cells can be seen in a longitudinal section through the battery 1 in FIG. 2 and with reference to an exemplary battery single cell 2

Provided with reference numerals. In this case, the battery individual cells are shown in FIG. 2 without their active material, which, however, is arranged in a manner known per se - and usually from the initially cited prior art - between the two parts of the frame 3 in the section represented here.

In FIG. 1, the battery individual cells 2 are stacked to form a cell stack 5, which is braced between two end plates 6, 7. According to the structure of the

Single battery cells 2 as bipolar Rahmenflachzellen is one of the end plates 6 of a pole of the battery 1, for example, the Massepol, while the other of the end plates 7, for example, the pole plate of the positive pole. Appropriate acceptance connection elements or the like can be arranged on these pole plates. However, since this is not relevant to the present invention, a corresponding representation has been omitted. The cell stack 5 is covered in the embodiment shown here by a cover element 8, which may for example be an insulating plate, or which may also be formed as a corresponding board having electronic components and circuits, for example, for single cell monitoring of the battery cells 2. This structure is also known per se and not relevant to the principle of the present invention. The ceiling element 8 is therefore not explained further. The battery 1 also has a manner also known per se

Cooling plate 9, which on the side facing away from the cover element 8 side

Cell stack 5 is arranged. The cooling plate is an electrically insulating, thermally conductive foil or an electrically insulating, heat-conductive potting compound with the battery cells 2 and here in particular with the cladding sheets 4 of

Battery individual cells 2 connected. The Hüllbleche 4 lead while in the

Batterieeinzelzelle 2 resulting heat in the direction of the cooling plate, which then transported away. For this purpose, the cooling plate 9 is flowed through in a manner known per se by a liquid or a coolant evaporating in the region of the cooling plate in order to dissipate waste heat arising in the battery 1.

The cell stack 5 together with the two end plates 6, 7 is here in the

shown construction over four tie rods 10 clamped, which are designed here as screws. You can, for example, have a mother and corresponding

To be screwed washers, it would also be possible to put the tie rods with their screw heads on the one end plate 7 and screw them with the other end plate 6 located therein threads. Depending on the polarity of the end plates, it must be ensured that the tie rods are correspondingly electrically insulated, for example provided with a corresponding coating, or are sheathed by corresponding sleeves made of electrically insulating material. It is also necessary to pay attention to a corresponding insulation of the tie rods 10 to the end plates 6, 7. This is also known from the prior art and for the

Professional usual, so that also does not have to be discussed here in the context of the presentation of the present invention.

In the representation of FIG. 2, a longitudinal section can now be seen through a section of the battery 1 or of the cell stack 5. As already mentioned above, the battery individual cells 2 can be seen here with a cross-section through their frame 3 and through their enveloping plates 4. The structure is shown to simplify the illustration without the active material of the battery cells 2. The structure of this material, however, results directly from the aforementioned prior art, so that it is clear to the person skilled in the art how the active material is arranged in the battery individual cells 2. The structure of the cell stack 5 in the representation of FIG. 2 is therefore shown in an unstressed or partially braced state. Between two of the

Single battery cells 2 is an elastic, electrically insulating material 11 to recognize, which may be formed, for example in the form of a plastic foam or plastic fleece. It isolates the cladding sheets 4 in the area in which it is inserted against each other and ensures by its elasticity in an unstressed or partially braced state of the cell stack 5 that the two adjacently arranged battery individual cells 2, between which the elastic, electrically insulating material 11 is disposed, be separated from each other so that the

Hüllbleche 4 of the two battery cells 2 have no electrical contact with each other.

This state can be seen even more clearly in the detail enlargement of FIG. The arrows indicate the force effect which originates from the elastic, electrically insulating material 11. The elastic material 1 1 is disposed on a portion of the Hüllbleche 4, and can be arranged in particular in an embossed depression of the Hüllbleche 4. This depression can be clearly seen again in FIG. 6 in a three-dimensional representation of a single battery cell 2 with its enveloping plates 4 and provided with the reference numeral 12.

4 shows the same detail from the cell stack 5 as in the representation of FIG. 2. However, the structure of the cell stack 5 in FIG. 4 is already shown in its tensioned state. This can

be achieved, for example, that is changed by tightening the tie rods 10 with a defined torque from the unstrained or partially braced state in the clamped state. The elastic, electrically insulating material is compressed so that the cladding sheets of the two battery individual cells 2, which are arranged adjacent to the electrically insulating elastic material 11, come into contact with each other. This can be seen again in detail in the enlarged section of FIG. Clearly here is the smaller thickness of the elastic, electrically insulating material 11 in comparison to Figure 3 can be seen. This is achieved by clamping the cell stack 5. The battery individual cells 2, which are arranged adjacent to the elastic material 11, now touch each other in the areas lying next to the elastic material 11. As a result, the electrical contact is achieved. The structure of the battery 1 in the manner according to the invention thus allows the

Battery individual cells 2 are stacked, wherein between the battery cells 2 each one layer of the elastic, electrically insulating material 11 is inserted. This ensures that the battery individual cells 2 do not experience any electrical contact of their Hüllbleche 4 to each other during assembly. This means that the battery is not electrically active yet. In this case, the elastic, electrically insulating material 11 can be inserted in particular between all individual battery cells 2. In a particularly favorable and economical embodiment, however, it is sufficient to place the elastic, electrically insulating material 11 at specific locations of the cell stack 5. These locations are to be chosen such that the groups of battery individual cells arranged between the ends and / or two of the elastic materials 11 can be contacted without reaching a voltage which is above a predetermined safety-relevant limit value. For example, it can be achieved by the elastic, electrically insulating material 11 that the battery individual cells 2 are combined to form individual groups, each of which, for example, does not exceed a value of 42 V. These individual blocks of 42 V are then separated from each other by the elastic, electrically insulating materials 11. During assembly, no voltages above 42 V can occur, so that it is possible to dispense with corresponding safety measures, as would be necessary in the installation of high-voltage batteries with significantly higher voltages.

The cell stack 5 can then be brought via the tie rods 10 in an assembled partially braced state in which the tie rods 10 with a first defined

Torque be tightened. In this partially braced condition, the elastic, electrically insulating materials 11 are still thick enough to hold the individual

Separate groups of battery cells 2 electrically. Only after the battery 1 is to be finally mounted, the tie rods 10 are tightened so far with a second defined torque that the cell stack 5 in his

Tense state changes. In this state, shown in FIGS. 4 and 5, the elastic, electrically insulating materials 11 are then compressed to such an extent that enveloping plates 4 of the battery individual cells 2 arranged adjacent to them are inserted into the

Regions adjacent to the elastic material 11 touch and so the electrical contact between the battery cells 2 and the groups from Create battery cells 2. The battery 1 is then electrically active and has only from this point on the full (high) voltage.

FIG. 6 once again shows a three-dimensional view of one of the battery individual cells 2. Clearly provided with the reference numeral 12 recess in the visible here Hüllblech 4 can be seen. In this recess, the elastic, electrically insulating material 11 can be introduced. The depression has the advantage that the material can be correspondingly thick, highly elastic and easy to handle, without it being too great distances over the tension

must be compressed. In addition, when the battery 1 is stacked, the depression 12 allows the elastic, electrically insulating material 11 to be inserted easily and precisely. As soon as the battery 1 is then transferred to a mounted and partially clamped state, the depression 12 also prevents the elastic, electrically insulating material from being prevented 11 can slip out of position, for example, when the cell stack 5 is set up so that the battery individual cells 2 are erected in the direction of gravity.

The invention thus makes it possible to realize a compact simple, cost-effective and quickly assembled structure, which can be used as a high-voltage battery, especially in vehicles.

Claims

claims
1. Battery with a plurality of battery cells, which in a bipolar
 Flat construction are realized, and which are stacked into a cell stack and clamped by clamping means,
 characterized in that
 an elastic, electrically insulating material (11) is arranged in the cell stack (5), at least at one point, between two adjacent battery individual cells (2), which in an unstrained or partially braced state of the cell stack (5) the two battery individual cells (2) electrically separated from each other, and which in the strained state of the cell stack (5) is compressible so far that the two battery cells (2) are contacted.
2. Battery according to claim 1,
 characterized in that
 the number of sites with the elastic, electrically insulating material (11) in the cell stack (5) are chosen such that the group of sites lying between two sites or one site and one end of the cell stack (5)
 Battery individual cells (2) each having a voltage which is below a predetermined limit.
3. Battery according to claim 1 or 2
 characterized in that
the clamping means are designed as tie rods (10).
4. Battery according to claim 3,
 characterized in that
 the tie rods (10) are tensioned by means of screws.
5. Battery according to one of claims 1 to 4,
 characterized in that
 the elastic, electrically insulating material (11) comprises or consists of a plastic foam or a plastic fleece.
6. Battery according to one of claims 1 to 5,
 characterized in that
 each of the battery individual cells (2) is constructed with two enveloping plates (4) and an electrically insulating frame (3) between the enveloping plates (4).
7. Battery according to claim 6,
 characterized in that
 the elastic, electrically insulating material (11) is arranged in a depression (12) of at least one of the cladding sheets (4) of the two adjacent battery individual cells (2) of the at least one location.
8. Battery according to one of claims 1 to 7,
 characterized in that
 an active material of the battery individual cells (2) is formed on the basis of anode and cathode foils.
9. Battery according to one of claims 1 to 8,
 characterized in that
 the battery is designed as a lithium-ion battery.
PCT/EP2010/004033 2009-07-31 2010-07-03 Battery having a plurality of single cells WO2011012197A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102009035460A DE102009035460A1 (en) 2009-07-31 2009-07-31 Battery with a large number of individual battery cells
DE102009035460.3 2009-07-31

Publications (1)

Publication Number Publication Date
WO2011012197A1 true WO2011012197A1 (en) 2011-02-03

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ID=42736157

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (2)

Country Link
DE (1) DE102009035460A1 (en)
WO (1) WO2011012197A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014207531A1 (en) * 2014-04-22 2015-10-22 Bayerische Motoren Werke Aktiengesellschaft Galvanic element with solid-state cell stack

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3520855C1 (en) 1985-06-11 1986-09-04 Deutsche Automobilgesellsch Galvanic cell with press contacting
WO1998012759A1 (en) * 1996-09-20 1998-03-26 Johns Manville International, Inc. Resilient mat; a method of making the resilient mat and a battery including the resilient mat
DE102006038362A1 (en) * 2006-08-11 2008-02-14 KREUTZER, André Flat galvanic element and method for producing flat galvanic elements
WO2008144994A1 (en) * 2007-05-29 2008-12-04 Byd Company Limited Battery pack
DE102007063181A1 (en) 2007-08-06 2009-02-19 Daimler Ag Single cell for a battery and method for its production
DE102007063179A1 (en) 2007-12-20 2009-06-25 Daimler Ag Battery as a flat cell assembly with a heat conducting plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3520855C1 (en) 1985-06-11 1986-09-04 Deutsche Automobilgesellsch Galvanic cell with press contacting
WO1998012759A1 (en) * 1996-09-20 1998-03-26 Johns Manville International, Inc. Resilient mat; a method of making the resilient mat and a battery including the resilient mat
DE102006038362A1 (en) * 2006-08-11 2008-02-14 KREUTZER, André Flat galvanic element and method for producing flat galvanic elements
WO2008144994A1 (en) * 2007-05-29 2008-12-04 Byd Company Limited Battery pack
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