阅读说明：本技术 用于使电的蓄能模块的多个存储单体电耦合的盖子 (Cover for electrically coupling a plurality of memory cells of an electrical energy storage module ) 是由 A·施密茨 B·祖耶夫 于 2018-04-18 设计创作，主要内容包括：本发明涉及一种用于使电的蓄能模块的多个存储单体(2)电耦合的盖子(1),其包括：嵌入到盖子(1)的电绝缘材料(7)中的导电的接触衬套(5、15)、该接触衬套在其内侧上朝内逐渐缩小,存储单体(2)的电极(4)能电接触地插入到接触衬套中；两个接头(13、14),其中一个接头是电耦合的存储单体(2)的正极并且另一个接头是电耦合的存储单体的负极；和多个印制导线(6、16),所述印制导线用于使存储单体(2)按预定义的方式电耦合,尤其用于使存储单体(2)串联地耦合,印制导线(6、16)完全容纳在盖子(1)的内部中,其中,盖子(1)能以可无破坏地松开的方式装配到存储单体上。另外,本发明涉及一种具有多个存储单体(2)的电的蓄能模块以及一种具有这种蓄能模块的机动车,所述蓄能模块通过这种盖子(1)耦合。(The invention relates to a cover (1) for electrically coupling a plurality of memory cells (2) of an electrical energy storage module, comprising: an electrically conductive contact sleeve (5, 15) which is embedded in the electrically insulating material (7) of the cover (1) and which tapers inwardly on its inner side and into which the electrode (4) of the memory cell (2) can be inserted in electrical contact; two terminals (13, 14), one of which is the positive pole of the electrically coupled memory cell (2) and the other of which is the negative pole of the electrically coupled memory cell; and a plurality of conductor tracks (6, 16) for electrically coupling the memory cells (2) in a predefined manner, in particular for coupling the memory cells (2) in series, the conductor tracks (6, 16) being accommodated completely in the interior of the cover (1), wherein the cover (1) can be fitted to the memory cells in a non-destructive manner. The invention further relates to an electrical energy storage module having a plurality of storage cells (2), which are coupled by means of a cover (1) of this type, and to a motor vehicle having an energy storage module of this type.)

1. cover (1) for electrically coupling a plurality of memory cells (2) of an electrical energy storage module, comprising:

an electrically conductive contact sleeve (5, 15) embedded in the electrically insulating material (7) of the cover (1), said contact sleeve tapering inwardly on the inside thereof, into which contact sleeve the electrode (4) of the memory cell (2) is inserted in an electrically contactable manner;

Two terminals (13, 14), one of which constitutes the positive pole of the electrically coupled memory cell (2) and the other of which constitutes the negative pole of the electrically coupled memory cell; and

A plurality of conductor tracks (6, 16) for electrically coupling the memory cells (2) in a predefined manner, in particular for coupling the memory cells (2) in series, the conductor tracks (6, 16) being completely accommodated in the interior of the cover (1);

Wherein the cover (1) can be mounted on the storage unit (2) in a manner that can be released without destruction.

2. Cap (1) according to claim 1, wherein the contact bushing (5, 15) is conically formed on its inner side.

3. A cap (1) as claimed in any one of the preceding claims, wherein said cap (1) is constructed of at least three layers, wherein one layer of printed conductors is embedded between two electrically insulating skin layers.

4. A cap (1) according to any of the preceding claims, wherein the cap (1) has a cavity (9) for a liquid coolant or refrigerant.

5. A cap (1) as claimed in claim 4, wherein the cavity (9) adjoins the conductor tracks (6) but is formed outside the conductor tracks (6).

6. Cover (1) according to claim 4 or 5, wherein the cover (1) has an inlet and an outlet (10, 11) respectively into the cavity (9), through which inlet and outlet a coolant or refrigerant can be introduced and removed.

7. A cap (1) as claimed in claim 4 or 5, wherein said coolant is a phase change material.

8. A cap (1) as claimed in claim 4, wherein the cavity (9) for the coolant or refrigerant is provided by a tube (12) which is partially coated with an electrically conductive material or consists of sections of an electrically conductive material and sections of an electrically insulating material in order to form the conductor tracks (16).

9. An electrical energy storage module having a plurality of storage cells (2) which are electrically coupled by a cover (1) according to one of claims 1 to 8.

10. The electrical energy storage module according to claim 9, wherein the storage cells (2) are lithium ion batteries.

11. Motor vehicle having an electrical energy storage module according to claim 9 or 10.

Technical Field

The invention relates to a cover for electrically coupling a plurality of storage cells of an electrical energy storage module, to an electrical energy storage module having such a cover, and to a motor vehicle having such an energy storage module.

Background

In the prior art, there are a number of possibilities for electrically coupling the individual storage cells of an electrical energy storage module to one another. The electrodes of the memory cells are in most cases connected to the cell connectors in such a way that the memory cells are connected in series. The cell connecting element is welded to the electrode of the storage cell, and the connection is not unbroken. However, in the event of a failure of the storage cells, the entire energy storage module must be replaced, which is associated with high costs.

Another possibility for coupling storage cells by means of attachable support plates is known, for example, from DE102011087040a 1.

Disclosure of Invention

The object of the present invention is to provide a cover for electrically coupling a plurality of memory cells of an electrical energy storage module, which cover provides a simpler handling. This object is solved by a cover according to claim 1, an electrical energy storage module according to claim 9 and a motor vehicle according to claim 11. Advantageous further developments of the invention are the subject matter of the dependent claims.

According to an embodiment of the invention, a cover for electrically coupling a plurality of memory cells of an electrical energy storage module is provided, comprising: an electrically conductive contact bush embedded in the electrically insulating material of the cover, which contact bush tapers on its inner side inwardly (i.e. in the direction away from the memory cell), into which contact bush the electrode of the memory cell can be inserted in electrical contact; two tabs, one of which is the positive pole of the electrically coupled memory cell and the other of which is the negative pole of the electrically coupled memory cell; and a plurality of conductor tracks for electrically coupling the memory cells in a predefined manner, in particular for coupling the memory cells in series, the conductor tracks being accommodated completely within the cover, wherein the cover can be fitted to the memory cells in a manner such that they can be released without destruction. Preferably, the contact bush is accommodated in the cover such that the side directed toward the storage unit is maximally exposed from the outside of the contact bush. In this case, the contact bush does not project outside the cover. However, it is also possible for the contact bush to protrude slightly outside the cover, in particular for the contact bush to protrude outside by a maximum of 30% of the depth of the contact bush. Here, the contact spacer depth is a depth in the inner portion of the contact spacer along the insertion direction of the electrode of the memory cell. The conductor tracks are completely accommodated inside the cover, which means that the conductor tracks are not exposed to the environment surrounding the cover. The advantage of this embodiment is that a one-piece, compact cover is thus achieved, which is already fixed by pressing or plugging onto the electrodes of the storage cells, since the cover is fixed to the energy storage module by the contact bushes, which are tapered down, when plugged onto the electrodes to a certain extent. By means of the non-destructive removal of the cover, in the event of a failure of an individual storage cell, the cover can be removed to replace the individual storage cell and can be plugged again after the replacement of the failed storage cell.

According to a further embodiment of the invention, the contact bushing is conical on its inner side. The contact bush is thus used on the one hand for guiding during insertion and thus for orienting the cover relative to the energy storage module, and on the other hand for fixing the cover to the energy storage module, in that the electrode is pressed into the conical contact bush and is thus held in a friction-locking manner in the contact bush.

According to a further embodiment of the invention, the cover is formed in at least three layers, the conductor tracks being embedded between two electrically insulating cover layers. The two cover layers thus form a touch-proof protection, and the conductor track layer located between the two cover layers can be adapted to the respective situation in which the desired memory cells are connected or coupled, so that different covers with different connections, for example a cover for electrically connecting the memory cells in series and a cover for electrically connecting the memory cells in parallel, can be provided at relatively little expense.

According to a further embodiment of the invention, the cover has a cavity for a liquid coolant or refrigerant. The advantage of this embodiment is that the waste heat of the energy storage module is conducted away from above the region of the electrodes and the conductor tracks. In the prior art, the energy storage modules are often cooled on the bottom, i.e. on the opposite side of the storage cells, but there is a greater cooling requirement on the side of the electrodes.

According to a further embodiment of the invention, the cavity adjoins the conductor track, but is formed outside the conductor track.

according to a further embodiment of the invention, the cover has an inlet and an outlet, respectively, into the cavity, through which coolant or refrigerant can be introduced or removed.

According to another embodiment of the invention, the coolant is a phase change material, in particular a two-phase change material.

According to a further embodiment of the invention, the cavity for the coolant or refrigerant is provided by a tube which is partially coated with an electrically conductive material or consists of sections of an electrically conductive material and sections of an electrically insulating material for forming the conductor tracks.

In addition, the invention provides an electrical energy storage module having a plurality of storage cells which are electrically coupled by a cover according to one of the above-described embodiments.

According to an embodiment of the energy storage module, the storage cells are lithium ion batteries.

The invention further provides a motor vehicle having such an electrical energy storage module.

Drawings

Preferred embodiments of the invention are described below with the aid of the figures. The attached drawings are as follows:

FIG. 1 shows a schematic three-dimensional view of a cover and a plurality of storage cells according to the invention;

Fig. 2 shows a schematic detailed view of a contact bush and a section of a printed conductor in the cover of fig. 1;

FIG. 3 shows a schematic view of a further version of the cover of FIG. 1 including a flow of coolant or cryogen adjacent the printed conductors; and is

Fig. 4 shows a schematic view of a further version of the cover of fig. 1, which includes a coolant or cryogen flow in the printed conductors.

Detailed Description

Fig. 1 is a schematic three-dimensional illustration of a cover 1 according to the invention and a plurality of storage cells 2 (only a few of which are provided with reference numerals). Fig. 2 is a schematic detailed view of a contact bush and a section of a printed conductor in the cover of fig. 1. The storage cells 2 are preferably prismatic rechargeable lithium ion batteries. The plurality of memory cells 2 are preferably connected electrically in series with one another, but parallel couplings are also conceivable, depending on the application. The memory cells 2, which are electrically coupled to one another and are associated with a single cover 1, together with the cover 1 form an electrical energy storage module 3. In a motor vehicle, a plurality of such energy storage modules 3 are usually connected electrically in parallel to one another and form an electrical energy store which supplies at least the energy for operating the motor vehicle. The memory cell 2 has two electrodes 4 each, specifically an anode terminal and a cathode terminal, which are arranged on the same side of the memory cell 2. The electrodes 4 (only a few of which are provided with reference numerals) protrude from the memory cells 2 and the outer circumference of the electrodes 4 is made to gradually shrink in a direction away from the memory cells 2. In particular, the electrode 4 is such that its circular cross-section tapers in diameter in a direction away from the memory cell 2. Preferably, the electrodes 4 are conical or tapered or truncated conical.

The cover 1 is preferably prismatic and has contact bushes 5 (only a few of which are provided with reference numerals) embedded in the cover 1, into which contact bushes the electrodes 4 of the memory cells can be inserted. The inner side of the contact bush 5 is adapted accordingly to the outer side of the electrode 4 assigned to it, i.e. they have a substantially uniform shape, so that the inner side of the contact bush 5 bears as well as possible against the outer side of the electrode 4 in order to form a good electrical contact. The contact bushes 5 of the energy storage modules 3 are connected to one another by means of conductor tracks 6 in order to achieve the desired coupling of the storage cells 2, for example, electrically in series or electrically in parallel. For example, as illustrated in fig. 1, a respective anode terminal of a memory cell 2 is connected to a cathode terminal of an adjacent memory cell 2 in such a way that the contact bush 4 which is in contact with said terminal is electrically connected by means of a conductor track 6. The conductor tracks 6, in particular the ends of the conductor tracks 6, are connected to the contact sleeve 5 in an electrically conductive manner, in particular in a manner that can be released without destruction. For example, the conductor tracks 6 can be welded or soldered to the contact bushes 5.

However, it is also possible for the contact bushes 5, for example two contact bushes, to be formed in one piece with one printed conductor 6. The conductor tracks 6 and the contact bushes 4 are embedded in an electrically insulating material 7 of the cover 1. The conductor tracks 6 are preferably not exposed to the outside (i.e. the environment surrounding the cover 1) at any point. The contact bush 5 is at least largely embedded in the cover 1, wherein the contact bush 5 is preferably accommodated in the cover 1 in such a way that a side 8 pointing towards the storage cells 2 is maximally exposed from the outside of the contact bush. In this case, the contact bush does not project outside the cover. However, it is also possible for the contact bush to protrude outside the cover, in particular for the contact bush to protrude outside by a maximum of 30% of the depth of the contact bush. Here, the contact spacer depth is a depth in the insertion direction of the electrode 4 of the memory cell 2 in the interior of the contact spacer 5. The contact bush 5 tapers on its inner side in the direction away from the memory cell 2 in the insertion direction of the electrode 4. In particular, the contact sleeve 5 is on its inner side such that the diameter of its circular cross section (perpendicular to the insertion direction) tapers away from the storage cells 2. Preferably, the contact sleeve 5 is conical or tapered or truncated conical. The cover 1 can, but does not necessarily need to, be releasably connected to the rest of the energy storage module (not depicted) or to a frame (not depicted) holding the energy storage module by means of a threaded connection 9. The lid 1 may be made of a rigid material. The cover 1 may also be made of an elastic material so that it is bendable. In the latter case, the insertion of the contact bush 5 onto the electrode 4 and thus the application of the cover 1 onto the memory cell 2 is facilitated and a better frictional retention is ensured.

different conversion schemes according to the inventive concept are conceivable. An electrically insulating material 7 can be cast as a filling around the contact bush 5 and the conductor tracks 6. Furthermore, the electrically insulating material 7 can be formed in the form of two plates, namely a plate facing the memory cell 2 and a plate facing away from the memory cell 2, between which the conductor tracks 6 in the form of a third layer are formed. The plates may be rigid or flexible plates. The conductor track layer can be embedded in one or both of the two plates made of electrically insulating material. The conductor tracks 6 can also be formed as a plurality of individual, mutually separated, rod-shaped, flat conductor tracks, in particular made of metal. It is also conceivable for the conductor tracks to be formed in the form of metallic conductor tracks of a printed circuit board or of a printed circuit board. The conductor tracks 6 can also be realized in the form of a plug system, so that the change in the connection of the contact sleeves 5 can be varied. In this case, the possibility of plugging can be provided in one or both of the two plates made of electrically insulating material, into which the conductor tracks 6 can be inserted during the production of the cover 1 depending on the desired connection, so that covers with different connections of the contact sleeve 5 can be provided with relatively little effort. The cover 1 has a total of two connections 13 and 14, of which one constitutes the positive pole of the electrically coupled memory cell 2 and the other constitutes the negative pole of the electrically coupled memory cell. That is, in the case where the individual memory cells 2 are connected in series with each other via the cover 1, the connector 13 is the positive pole of the series circuit and the connector 14 is the negative pole of the series circuit.

fig. 3 shows a schematic view of a further version of the cover 1 of fig. 1, which comprises a coolant or cryogen flow adjacent the printed conductors. In a further development, the cover 1 can be provided with integrated cooling means. As illustrated in fig. 3, the cavity 9 is arranged adjacent to the conductor tracks 6, which are arranged between the contact sleeves 5. In the exemplary embodiment of fig. 3, the contact sleeve 5 and the conductor track 6 connecting said contact sleeve are formed in one piece, in particular in one piece. The cavity 9 is adapted to receive a coolant which can directly touch the contact sleeve 5 and the conductor tracks 6 or form an electrically insulating coating between them, for example a teflon or polymer coating. When the coolant touches the contact sleeve 5 and the conductor tracks 6 directly, the coolant must be an electrically non-conductive coolant, for example an electrically non-conductive oil. The coolant is preferably a liquid coolant or refrigerant.

The cavity 9 can also be a fluid-tightly closed space which is filled with a phase-change material serving as a coolant. Preferably, however, the cavity 9 is provided with an inlet 10 and an outlet 11 and is fluid-tightly closed except for the inlet and the outlet. The cavity 9 is connected to a closed cooling or refrigeration circuit by means of an inlet 10 and an outlet 11.

Fig. 4 shows a schematic view of a further version of the cover of fig. 1, which includes a coolant or cryogen flow in the printed conductors. In the embodiment depicted in fig. 4, the cavity 9 adapted to receive the coolant is formed by the interior of a tube 12 which extends continuously from the inlet 10 to the outlet 11. In the pipe 12, the contact bush 15 is constructed in the manner described in connection with the contact bush 5 by means of a recess in the pipe 12. In order to form the conductor tracks 16 or to form the electrical conductivity of the conductor tracks 16, which connect selected contact bushes 15 to one another, and in order to form the electrical conductivity of the contact bushes 15, the sections of the tube 12 forming the conductor tracks 16 and the contact bushes 15 are formed from an electrically conductive material and the remaining sections of the tube 12 are formed from an electrically insulating material. The tube 12 may also be formed continuously from an electrically insulating material and be partially covered or coated with an electrically conductive material in order to form the electrical conductivity of the conductor tracks 16 and the contact sleeves 15.

The invention is illustrated and described in detail in the drawings and foregoing description, the illustration and description being to be considered illustrative or exemplary and not restrictive, and the invention is not intended to be limited to the disclosed embodiments. The mere fact that certain features are recited in mutually different dependent claims does not indicate that a combination of these features cannot be used to advantage.