DE102011015040A1 - Electrical energy storage of a motor vehicle - Google Patents

Abstract

The invention relates to an electrical energy store of a motor vehicle, with a plurality of electrically coupled storage cells (11), each storage cell (11) having electrical connection poles (13, 14) which are electrically coupled to electrical connection poles (13, 14) of adjacent storage cells (11) , wherein at least those electrical connection poles (13, 14) of the storage cells (11) which are electrically coupled to electrical connection poles (13, 14) of adjacent storage cells (11) are designed in the manner of a terminal, and wherein for the electrical coupling, adjacent storage cells (11) in the terminal poles (13, 14), which are designed like clamps, are inserted in the manner of rails or webs, electrically conductive coupling means (15).

Description

The invention relates to an electrical energy store of a motor vehicle according to the preamble of patent claim 1 and a memory cell of such an electrical energy store according to the preamble of claim 11. Furthermore, the invention relates to an electrical energy storage of a motor vehicle according to the preamble of claim 12 and a coupling means of such an electrical energy store according to the preamble of claim 16.

From the US Pat. No. 7,604,896 B2 is an electrical energy storage device for a motor vehicle with the features of the preamble of claim 1 is known. Thus, the electrical energy storage disclosed therein comprises a plurality of electrically coupled memory cells, each memory cell having electrical connection poles, namely a positive connection pole and a negative connection pole. To form a series connection of a plurality of memory cells, the electrical connection poles of adjacent memory cells are electrically coupled.

The known from the prior art, electrical energy storage of motor vehicles all have the disadvantage that the electrical coupling of memory cells of the energy storage is complicated or cumbersome. There is therefore a need for an electrical energy store of a motor vehicle, which is characterized by a simpler, electrical coupling of memory cells.

On this basis, the object of the present invention is to provide a novel electrical energy store of a motor vehicle.

This object is achieved according to a first aspect of the invention by an electrical energy storage device according to claim 1 and by a memory cell according to claim 11.

Thereafter, at least those terminal poles of those memory cells that are electrically coupled to electrical terminal poles of adjacent memory cells of the electrical energy storage, clamp-like design. In this clamp-shaped terminal poles rail-like or web-like, electrically conductive coupling means are inserted for the electrical coupling of adjacent memory cells.

By simply inserting the coupling means in the terminal-like terminal poles so memory cells can be electrically coupled. By merely removing the coupling means from the terminal-like terminal poles, the memory cells can be electrically decoupled. For electrical coupling therefore no screw or the like are required. All memory cells can be connected and disconnected with minimal effort.

According to an advantageous embodiment of the invention, at least those electrical terminal poles of the memory cells, which are electrically coupled to electrical terminal poles of adjacent memory cells, each formed as a plate packs of a plurality of resilient, metallic terminals.

Then, when the terminal-like electrical terminal poles are formed as disk packs, each with a plurality of resilient metallic terminals, a secure, electrical coupling of the memory cells is always guaranteed, even if the memory cells or terminal poles is subject to mechanical expansion or mechanical shrinkage as a result of temperature cycles , The disk packs thus always ensure a secure, electrical contact with the coupling element and thus an electrical coupling between the memory cells. A tolerance compensation between the individual memory cells is not required. The coupling means inserted in the disk packs have no fixed connection points to the disk packs, so that a relative movement while maintaining the electrical contact is possible.

Preferably, the rail-like or web-like, electrically conductive coupling means are formed as disk packs of a plurality of conductor rails or conductor bars.

Then, even if the electrical coupling means, which are inserted into the terminal poles designed as a plate terminals, are designed as disk packs, the electrical coupling between the coupling means and terminal poles of the memory cells can be further improved.

According to an advantageous embodiment of the invention, the rail-like or web-like, electrically conductive coupling means on a flowed through by coolant cooling channel. Then, when the electrically conductive coupling means having a cooling channel, which is flowed through by coolant, overheating of the electrical energy storage can be avoided in a particularly effective manner.

According to a second aspect of the invention, this object is achieved by an electrical energy store according to claim 12 and a coupling means according to claim 16.

Thereafter, at least those electrical terminal poles of the memory cells, which are electrically coupled to electrical terminal poles of adjacent memory cells, coupled via rail-like or web-like, electrically conductive coupling means, wherein the coupling means comprise terminal-like coupling segments, via which the coupling means are attached to the terminal poles.

According to the second aspect of the invention, therefore, the contacting principle between memory cells and coupling means is reversed in comparison with the first aspect of the invention, in which case the coupling means have terminal-like coupling segments for plugging them onto the terminal poles of the memory cells.

Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:

1 a schematic plan view of a first inventive electrical energy storage of a motor vehicle with a memory cell stack of a plurality of electrically series-connected memory cells;

2 a schematic plan view of a second electrical energy storage device according to the invention of a motor vehicle with two memory cell packets electrically connected in parallel from each of a plurality of memory cells electrically connected in series;

3 a detail of the energy storage of 1 and 2 in the region of two connection poles of two memory cells electrically coupled via a coupling means; and

4 a detail of a connection pole.

The present invention relates to an electrical energy storage of a motor vehicle, such as a starter battery or a traction battery in a hybrid vehicle or electric vehicle.

1 shows a first embodiment of an electrical energy storage 10 that has several memory cells 11 includes. In the embodiment of 1 includes the energy storage 10 in total over a number N = twelve parallelepiped memory cells 11 , In the embodiment of 1 are all twelve memory cells 11 geometrically arranged side by side or in succession and to form a single memory cell stack 12 electrically coupled in the sense of an electrical series connection. As an alternative to cuboid memory cells, round memory cells or foil memory cells can also be used. Every memory cell 11 has on one side or surface of the same electrical connection poles 13 . 14 namely, a positive terminal pole 13 and a minus terminal pole 14 ,

To train the in 1 shown series connection of N = twelve memory cells 11 is at a number N - 2 = ten memory cells 11 namely, in the middle ten memory cells positioned side by side or in succession 11 , in each case a positive connection pole 13 a memory cell 11 with a negative connection pole 14 a first, adjacent memory cell 11 and a minus connection pole 14 the respective memory cell 11 with a positive connection pole 13 a second, adjacent memory cell 11 electrically coupled.

For the remaining number of two memory cells 11 namely the two outer memory cells 11 , is in each case a terminal pole, namely at the left memory cell 11 the positive connection pole 13 and at the right memory cell 11 the minus connection pole 14 , with an opposite pole terminal of the respective adjacent memory cell 11 coupled, whereas the respective other terminal pole of the respective outer memory cell 11 the memory cell package 12 namely, the minus terminal pole 14 the left memory cell 11 and the positive terminal pole 13 the right memory cell 11 , one main connection pole each 20 . 21 the memory cell package 12 and thus the energy storage 10 formed. At the main connection pole 20 the memory cell package 12 it is a plus main connection pole and the main connection pole 21 the memory cell package 12 it is a negative main connection pole.

At least those electrical connection poles 13 . 14 the memory cells 11 connected to electrical connection poles 14 . 13 adjacent memory cells 11 are electrically coupled, are formed like a terminal, wherein for the electrical coupling of the respective terminal poles of adjacent memory cells 11 in the terminal-like connection pole 13 . 14 rail-like or web-like, electrically conductive coupling means 15 intervention.

How best 3 and 4 can be removed, are the electrical connection poles 13 and 14 , which are formed like a clamp, preferably as disk packs of a plurality of resilient, metallic clamps 16 educated. According to 3 and 4 In this case, in the exemplary embodiment shown, it comprises each disk pack four spring-loaded, metallic clamps 16 , which form the respective formed as a plate pack terminal pole 13 respectively. 14 are positioned next to each other or behind each other. The number of terminals per disc pack can vary.

The clamps 16 The lamella pacts are formed approximately U-shaped with a plurality of legs, namely with opposite, resilient Kontaktierungsschenkeln 17 for electrically contacting a rail-like or web-like coupling means inserted in the respective disk pack 15 and with a spring-elastic contacting leg 17 connecting connecting leg 18 over which the terminals 16 of the respective disk pack at the respective memory cell 11 firmly attached.

According to 4 are all Kontaktierungsschenkel 17 all terminals 16 via a common connecting leg 18 coupled and at the respective memory cell 11 firmly attached. In contrast, for the Kontaktierungsschenkel 17 also individual connection legs 18 to be available.

Within a disk pack are the resilient Kontaktierungsschenkel 17 the terminals 16 independently of one another elastically deformable. The disk packs and thus the connecting poles 13 and 14 may be mechanical and / or thermal expansions of the memory cells 11 compensate and always secure contact with one in the disk packs or connecting poles 13 . 14 inserted coupling agent 15 guarantee. The in the disk packs or connecting poles 13 . 14 inserted coupling agent 15 have no fixed connection points to the disk packs or connecting poles 13 . 14 ,

The electrical contacting of a in a disk pack or a terminal pole 13 . 14 inserted coupling agent 15 takes place via ramp-like projections 19 attached to the contacting legs 17 are formed.

According to an advantageous embodiment of the invention, the rail-like or web-like, electrically conductive coupling means can also 15 be formed of disk packs each having a plurality of conductor rails or conductor bars.

In this case, you can also use the coupling agent 15 an extension of the memory cells 11 within the electrical energy storage 10 be compensated.

As already stated, the individual memory cells 11 of the electrical energy storage 10 merely by inserting the coupling agent 15 in the connection poles 13 . 14 electrically contacted. There are no fixed connection points between the connection poles 13 . 14 and the rail-like coupling means 15 , so no tolerance compensation between the memory cells 11 of the electrical energy storage 10 is required.

2 shows an embodiment of an electrical energy storage 10 with a number 2 × N = eight memory cells 11 , wherein in each case a number N = four memory cells 11 forming a memory cell packet 12a and 12b are electrically connected in series and wherein the two memory cell packets 12a and 12b of the electrical energy storage 10 are electrically connected in parallel.

Within each memory cell packet 12a and 12b are the connecting poles 13 . 14 adjacent memory cells 11 by inserting the coupling agent 15 in the trained as a plate pack terminal poles 13 and 14 electrically coupled, wherein each memory cell packet 12a and 12b for a number N-2 memory cells, namely for the middle memory cells 11 of the respective memory cell packet 12a and 12b , a positive connection pole 13 a memory cell 11 with a negative connection pole 14 a first, adjacent memory cell 11 and a minus connection pole 14 the respective memory cell 11 with a neighboring positive terminal pole 13 a second, adjacent memory cell 11 of the respective memory cell packet 12a . 12b is coupled, namely in each case via a coupling agent 15 , At least these connection poles 13 . 14 are clamp-like, preferably as disk packs each having a plurality of resilient, metallic terminals 16 , educated.

The two outer memory cells 11 each memory cell packet 12a and 12b are electrically coupled in another way, namely such that at first of these memory cells 11 the memory cell packets 12a and 12b , namely in 2 each at the upper memory cells 11 , the minus connection poles 14 the respective memory cells 11 with a positive connection pole 13 an adjacent memory cell 11 of the respective memory cell packet 12a respectively. 12b via an inserted coupling agent 15 coupled, whereas the positive terminal poles 13 these memory cells 11 the two memory cell packets 12a and 12b coupled to each other, namely to form the positive main terminal pole 20 of the electrical energy storage 10 ,

At the other two outer memory cells 11 each memory cell packet 12a and 12b , namely in 2 at the two lower memory cells 11 the two memory cell packets 12a and 12b , are each the positive terminal poles 13 with a minus connecting Poland 14 an adjacent memory cell 11 within the respective memory cell packet 12a respectively. 12b electrically coupled, whereas the negative terminal poles 14 these outer memory cells 11 the two memory cell packets 12a and 12b electrically coupled to each other, namely to form the negative main terminal pole 21 of the electrical energy storage 10 ,

In 2 are all connecting poles 13 . 14 all memory cells 11 the memory cell packets 12a . 12b designed like a clamp, namely as disk packs of several resilient, metallic terminals 16 ,

In this respect, in the embodiment of the 2 the contacting of all memory cells 11 in the sense of a series connection within the memory cell packets 12a and 12b and in the sense of a parallel connection between the memory cell packets 12a and 12b via rail-like coupling agents 15 in the connection poles 13 . 14 are plugged in.

In contrast, in the embodiment of the 1 the terminal poles of the outer memory cells 11 , which is the plus main connection pole and the minus main connection pole of the electrical energy storage 10 of the 1 form, not designed as a terminal-like terminal poles in the form of disk packs, but rather in the region of these terminal poles is a screw for electrical contacting of the electrical energy storage 10 , In contrast to this, however, it is also possible to carry out these terminal poles like a terminal via disc packs.

According to an advantageous development, it can be provided that the rail-like or web-like, electrically conductive coupling means 15 Coolant flow through coolant channels, so as to heat in the area of the memory cells 11 arises, via the coupling agent 15 dissipate. As a result, then take over the coupling means 15 not only the function of the electrical coupling of memory cells 11 but rather also a cooling function for the same.

By reversing the contacting principle between the memory cells and the coupling means, it is also possible in a variant of the invention not shown, that the coupling means have clamping-like coupling segments for mounting the same on preferably conventionally formed terminal poles of the memory cells.

In this variant, then at least those electrical terminal poles of the memory cells, which are electrically coupled to electrical terminal poles of adjacent memory cells, coupled via rail-like or web-like, electrically conductive coupling means, wherein the coupling means have terminal-like coupling segments, via which the coupling means are attached to the terminal poles ,

In this case, then at least the coupling segments of the coupling means are formed as disk packs of a plurality of resilient metallic terminals, the terminals of the disk packs are U-shaped with a plurality of legs, namely with opposite, resilient Kontaktierungsschenkeln for electrically contacting one of the terminal poles of a memory cell and with a connecting leg connecting the Kontaktierungsschenkel, via which the terminals of the disk packs are connected to the coupling means, wherein within each disk pack, the Kontaktierungsschenkel are independently resiliently deformable.

Preferably, in this case, the coupling means are completely formed as plate packs of a plurality of conductor rails or conductor bars.

With regard to all other details of this variant of the invention, not shown, to avoid repetition of the statements to 1 to 4 directed.

LIST OF REFERENCE NUMBERS

10

electrical energy storage

11

memory cell

12

Memory cells package

12a

Memory cells package

12b

Memory cells package

13

Connecting pole / Plus terminal pole

14

Connecting pole / minus terminal pole

15

coupling agent

16

clamp

17

Kontaktierungsschenkel

18

connecting leg

19

head Start

20

Hauptanschlusspol / Plus Hauptanschlusspol

21

Hauptanschlusspol / minus Hauptanschlusspol

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 7604896 B2 [0002]

Claims (16)

Electric energy storage device of a motor vehicle, having a plurality of electrically coupled storage cells ( 11 ), each memory cell ( 11 ) electrical connection poles ( 13 . 14 ), which are connected to electrical connection poles ( 13 . 14 ) of adjacent memory cells ( 11 ) are electrically coupled, characterized in that at least those electrical connection poles ( 13 . 14 ) of the memory cells ( 11 ) connected to electrical connecting poles ( 13 . 14 ) of adjacent memory cells ( 11 ) are electrically coupled, are formed like a terminal, and that for electrical coupling adjacent memory cells ( 11 ) in the terminal-like terminal poles ( 13 . 14 ) rail-like or web-like, electrically conductive coupling means ( 15 ) are inserted. Energy store according to claim 1, characterized in that at least those electrical connection poles ( 13 . 14 ) of the memory cells ( 11 ) connected to electrical connecting poles ( 13 . 14 ) of adjacent memory cells ( 11 ) are electrically coupled, each as a plate packs of a plurality of resilient, metallic terminals ( 16 ) are formed. Energy store according to claim 2, characterized in that the terminals ( 16 ) of the disk packs U-shaped with several legs ( 17 . 18 ) are formed, namely with opposing, resilient Kontaktierungsschenkeln ( 17 ) for electrically contacting a plugged into the respective plate pack, rail-like or web-like coupling means ( 15 ) and with a the resilient Kontaktierungsschenkel ( 17 ) connecting connecting leg ( 18 ) over which the terminals ( 16 ) of the disk packs at the respective memory cell ( 11 ) are connected. Energy storage according to claim 3, characterized in that within each disk pack, the resilient Kontaktierungsschenkel ( 17 ) of the terminals ( 16 ) are elastically deformable independently of each other. Energy store according to one of claims 1 to 4, characterized in that the coupling means ( 15 ) are formed as disk packs of several conductor rails or conductor bars. Energy store according to one of claims 1 to 5, characterized in that the rail-like or web-like, electrically conductive coupling means ( 15 ) comprise at least one coolant channel through which coolant flows. Energy store according to one of claims 1 to 6, characterized in that the memory cells ( 11 ) at least one memory cell packet ( 12 ; 12a . 12b ) having a plurality of memory cells connected in series ( 11 ) form. Energy store according to claim 7, characterized in that the memory cells ( 11 ) a plurality of memory cell packets ( 12a . 12b ) each having a plurality of memory cells electrically connected in series ( 11 ), the memory cell packets ( 12a . 12b ) are electrically connected in parallel. Energy store according to claim 7 or 8, characterized in that the respective memory cell packet ( 12 ; 12a . 12b ) each comprise a number of N side-by-side memory cells, with a number of N-2 memory cells ( 11 ) a positive connection pole ( 13 ) via a first electrically conductive coupling agent ( 15 ) with a minus connection pole ( 14 ) of a first adjacent memory cell ( 11 ) and a minus connection pole ( 14 ) via a second electrically conductive coupling agent ( 15 ) with a positive connection pole ( 13 ) of a second adjacent memory cell ( 11 ) is electrically coupled, and wherein in a number of 2 memory cells ( 11 ) a connection pole ( 13 . 14 ), namely in the case of a memory cell of the positive connection pole ( 13 ) and in the other salivary cell the negative pole ( 14 ), via an electrically conductive coupling agent ( 15 ) with a polarity terminal pole ( 14 . 13 ) of an adjacent memory cell ( 11 ) is coupled, whereas the respective other terminal pole ( 13 . 14 ) of the respective salivary cell ( 11 ) a main connection pole ( 20 . 21 ) of the memory cell package ( 12 ; 12a . 12b ) and / or the energy storage forms. Energy store according to claim 9, characterized in that the same pole terminal poles ( 13 . 14 ) of several memory cell packets ( 12a . 12b ) each via electrically conductive coupling agent ( 15 ) are electrically coupled. Memory cell for an electrical energy store of a motor vehicle, in particular for an energy store according to one of claims 1 to 10, with electrical connecting poles, characterized in that at least those electrical connection poles ( 13 . 14 ) of the memory cell ( 11 ), which are electrically coupled to electrical terminal poles of adjacent memory cells, are formed like a terminal, wherein the electrical coupling adjacent memory cells in the terminal-like terminal poles rail-like or web-like design, electrically conductive coupling means ( 15 ) are plugged. Electric energy storage of a motor vehicle, having a plurality of electrically coupled memory cells, each memory cell electrical Having terminal poles which are electrically coupled to electrical terminal poles of adjacent memory cells, characterized in that at least those electrical terminal poles of the memory cells which are electrically coupled to electrical terminal poles of adjacent memory cells are coupled via rail-like or web-like, electrically conductive coupling means, wherein the coupling means like a clip have trained coupling segments over which the coupling means are attached to the terminal poles. Energy storage device according to claim 13, characterized in that at least the coupling segments of the coupling means are formed as plate packs of a plurality of resilient metallic terminals, wherein the terminals of the plate packs are U-shaped with a plurality of legs, namely with opposite, resilient Kontaktierungsschenkeln for electrical contacting one of the terminal poles of a memory cell and with a connecting leg connecting the Kontaktierungsschenkel, via which the terminals of the disk packs are connected to the coupling means, wherein within each disk pack, the contacting legs are independently resiliently deformable. Electrical energy storage device according to claim 14, characterized in that the coupling means are completely formed as a plate packs of a plurality of conductor rails or conductor bars. Electrical energy store according to one of claims 12 to 14, characterized by features according to one of claims 6 to 10. Coupling means for coupling memory cells of an electrical energy store of a motor vehicle, in particular an energy store according to one of claims 12 to 15, characterized in that the same terminal-like coupling segments has, via which the coupling means can be plugged onto the terminal poles of memory cells.

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