DE102017204724A1 - Battery module, battery with at least one such battery module and method for producing such a battery module - Google Patents

Abstract

Proposed is inter alia a battery module (5), with a cell carrier plate (7) and with a plurality of battery cells (6), which are arranged on said cell carrier plate (7), wherein the battery cells () each have a cell housing (8) and at least one, in the cell housing (8) arranged cell coils (9). Advantageously, it is provided that the cell housing (8) of the plurality of battery cells (6) are each cup-shaped and integrally formed with the cell carrier plate (7).

Description

The invention relates to a battery module according to the preamble of claim 1 or 9 of the invention. According to claim 10 of the invention further relates to a battery with at least one such battery module. According to claim 11 or 12 of the invention further relates to a method for producing such a battery module.

Lithium-ion batteries have been known for some time from practice, which have a cell winding arranged in a fixed housing or cell housing as the core component of an electrical cell. For this purpose, individual layers of the cell are stacked and then wound around a mandrel. The cylindrical cell coil, also referred to as a jelly roll, is then packaged in a solid housing having a circular cross-section, which usually also represents the current conductor for the negative electrode. The positive electrode is formed by a cover isolated from the housing. Such a lithium-ion cell is also referred to as a round cell. Furthermore, so-called prismatic cells are also known. Although these are usually also wound cells, but their cell winding is not wound around a thorn, but flat. The resulting flat coil is packed in a prismatic housing. The electrodes are generally contacted by the housing via the cover of the housing (see Dr. Michael Buser (Risk Experts Risk Engineering GmbH) and Dr. Jochen Mähliß (Battery University GmbH), "Lithium Batteries Fire Hazards and Security Risks", Version 1 - April 2016 , in particular page 9, point 1.4 - http://www.batteryuniversity.eu/Publikation/DE_index_1194.html). In addition, from the DE 10 2007 010 743 B3 a battery with a heat conducting plate for temperature control of the battery known, which has a plurality of parallel and / or serially interconnected individual cells in the form of round cells. The round cells are arranged in a particularly completely closed battery housing. The individual cells are arranged on a heat conducting plate designed as a metal plate. In the heat conducting a through-flow for a heat transfer medium channel structure is arranged. The arrangement of the individual cells on the heat conduction takes place with their longitudinal axes parallel to each other. The DE 10 2008 059 967 A1 describes a battery with a arranged in a battery housing heat conducting. Again, a plurality of parallel and / or serially interconnected and a cell assembly forming individual cells in the form of round cells are provided, which are thermally conductively connected to the heat conducting plate and attached to the top and / or bottom side of this. For this purpose, the battery housing has a bottom plate, with a shape edge and with recesses for the individual cells. The individual cells are arranged with the pole side toward the heat conducting plate so that both pole contacts of each individual cell extend through the relevant recess. Between the heat conducting plate and the cell composite thermally conductive and electrically insulating moldings are arranged.

The object of the invention is to design a battery module that is alternative with regard to the prior art in such a way that it is labor-intensive. Furthermore, it is an object of the invention to provide a battery with at least one such battery module available. It is another object of the invention to provide a method for producing such a battery module.

According to a first advantageous embodiment of the invention, starting from a battery module, with a cell carrier plate and with a plurality of battery cells, which are arranged on said cell carrier plate, wherein the battery cells each have a cell housing and at least one arranged in the cell housing cell winding, the stated object achieved in that the cell housing of the plurality of battery cells are each cup-shaped and integrally formed with the cell carrier plate.

A cup-shaped cell housing is understood here to mean a cell housing with a cell bottom and with a cell wall which is preferably arranged orthogonally to it and also revolves. As a result, a battery module is created, which is reduced in terms of its production due to minimized number of components. In particular, this results in space, weight and cost advantages. Furthermore, this measure advantageously reduces the heat transfer between any provided tempering medium, in particular cooling medium, and the battery cells. Furthermore, it is possible to optimize the electrical connection and interconnection, preferably parallel connection of the battery cells of the battery module designed according to the invention, since e.g. Welding operations on the finished battery cells, as they are favored in the prior art, are avoided.

The subclaims describe preferred developments or refinements of the invention.

Thereafter, the cell housing formed preferably have a round or a polygonal, in particular rectangular or square cross-section, which can be generated depending on the current requirement round or prismatic battery cells. Under a round cross section is not only a circular but also a rounded cross section, for example, an elliptical cross section Understood. According to a first preferred embodiment of the said cell housing, these are each formed by a tube extending from the cell carrier plate orthogonal to the same and closed by the same one end with a round or polygonal cross section. The free spaces to be recorded between the tubular cell housings can be used elsewhere, for example for temperature control of the battery cells, by virtue of the fact that a temperature control fluid flows through the said free spaces. The cell carrier plate together with the cell housing formed integrally therewith is produced, for example, by a 3D printing method or by a casting method. According to a second advantageous embodiment of said cell housing with the round or polygonal cross-section, these are each formed by a cup-shaped cavity in a common, compact block of material of the cell carrier plate. That is, the cell carrier plate is dimensioned such that only by, for example, mechanical processing of said block of material, such as drilling or milling, the cup-shaped cavities are formed to represent the cell housing and receiving the cell wraps. In contrast, such a compact cell carrier plate can also be produced by a 3D printing method or by a casting process. By these measures, a particularly resistant battery module can be formed. In order to enable a simple and cost-effective electrical contacting of the battery cells, it is provided in development of the invention that the cell carrier plate is electrically conductive together with the cell housing and having a polarity of the battery module by means of an electrode terminal, whereas the other polarity by either an electrode terminal of each one relevant cell housing together with cell winding closing and electrically insulated to the cell housing formed lid member or by an electrode terminal of a common, the cell housing closing and the same electrically insulated formed lid member of the battery module or at least one battery module having battery available. Alternatively, it is provided that by means of separate electrode connections, both polarities are made available by either a cover element closing the respective cell housing together with cell winding or by a common cover element of the battery module closing the cell housing or a battery having at least one battery module. Furthermore, it can also be provided and is also covered by the invention that the cell carrier plate together with the cell housing and / or the cell housing closing lid elements or a common cover element are electrically non-conductive, but have an electrically conductive structure for electrically interconnecting the battery cells formed. In order to enable an active temperature control of the battery cells is further preferred that at least the cell carrier plate has at least one of a medium for controlling the temperature of the battery cells of the battery module through-flow channel structure.

According to a second advantageous embodiment of the invention, starting from a battery module, with a cell carrier plate and a plurality of battery cells, which are arranged on said cell carrier plate, wherein the battery cells each have a cell housing and at least one, arranged in the cell housing cell winding, the stated object achieved in that the cell housing of the plurality of battery cells are integrally formed by an extruded profile and that said extruded profile is connected or connectable to a separately prepared cell carrier plate, which closes the cell housing formed one end.

This also creates a battery module, which is reduced in terms of its production due to minimized number of components.

The invention also relates to a battery, with at least one battery module of the above-described embodiments of the same.

1. a) Bereitstellung einer Zellträgerplatte, welche einstückig eine Mehrzahl becherförmig ausgebildeter Zellgehäuse aufweist,
2. b) Bestückung der Zellgehäuse mit jeweils zumindest einem Zellwickel, und
3. c) Verschließen der Zellgehäuse mit je einem oder einem gemeinsamen Deckelelement.

The method for producing a battery module of the above-described first embodiment of the invention is characterized by the following steps:

1. a) providing a cell carrier plate which integrally has a plurality of cup-shaped cell housings,
2. b) equipping the cell housing with at least one cell winding, and
3. c) closing the cell housing with one or a common cover element.

1. a) Bereitstellung einer Zellträgerplatte,
2. b) Bereitstellung eines Strangpressprofils welches einstückig eine Mehrzahl Zellgehäuse ausbildet,
3. c) Verschließen der gebildeten Zellgehäuse einenends mittels der Zellträgerplatte,
4. d) Bestückung der gebildeten Zellgehäuse mit jeweils zumindest einem Zellwickel, und
5. e) Verschließen der Zellgehäuse anderenends mit je einem oder einem gemeinsamen Deckelelement.

The method for producing a battery module of the above-described second embodiment of the invention is characterized by the following steps:

1. a) provision of a cell carrier plate,
2. b) providing an extruded profile which integrally forms a plurality of cell casings,
3. c) closing the cell housing formed at one end by means of the cell carrier plate,
4. d) equipping the cell housing formed with at least one cell winding, and
5. e) closing the cell housing at the other end with one or a common cover element.

• 1 äußerst schematisch ein mit einer Traktionsbatterie bzw. Hochvolt-Batterie ausgestattetes Fahrzeug, welche Batterie zumindest ein Batteriemodul der erfindungsgemäßen Art aufweist,
• 2 eine Explosionsdarstellung eines Batteriemoduls gemäß einer ersten vorteilhaften Ausführungsvariante der Erfindung,
• 3 eine erste alternative Ausführungsform des Batteriemoduls nach 2,
• 4 eine zweite alternative Ausführungsform des Batteriemoduls nach 2,
• 5 eine dritte alternative Ausführungsform des Batteriemoduls nach 2,
• 6 eine vierte alternative Ausführungsform des Batteriemoduls nach 2,
• 7 eine fünfte alternative Ausführungsform des Batteriemoduls nach 2,
• 8 eine Explosionsdarstellung eines Batteriemoduls gemäß einer zweiten vorteilhaften Ausführungsvariante der Erfindung, und
• 9 eine alternative Ausführungsform des Batteriemoduls nach 8.

The invention will be explained in more detail with reference to the embodiments schematically illustrated in the drawings. However, it is not limited to these, but covers all embodiments defined by the claims. Show it:

• 1 very schematically a equipped with a traction battery or high-voltage battery vehicle, which battery has at least one battery module of the type according to the invention,
• 2 an exploded view of a battery module according to a first advantageous embodiment of the invention,
• 3 a first alternative embodiment of the battery module according to 2 .
• 4 a second alternative embodiment of the battery module according to 2 .
• 5 a third alternative embodiment of the battery module according to 2 .
• 6 a fourth alternative embodiment of the battery module according to 2 .
• 7 a fifth alternative embodiment of the battery module after 2 .
• 8th an exploded view of a battery module according to a second advantageous embodiment of the invention, and
• 9 an alternative embodiment of the battery module after 8th ,

1 shows first a vehicle 1 , in this case a passenger car, with an electric motor 2 as a drive motor and a battery 3 , According to this embodiment is thus a purely electrically powered vehicle 1 with a traction or high-voltage battery 3 , Also covered by the invention is a so-called hybrid vehicle, which in addition to one or more electric motors 2 also has an internal combustion engine (not shown in the drawing). In general, the battery points 3 at least one, preferably two or more in a battery case 4 arranged and mutually electrically interconnected battery modules 5 on, which in each case a plurality of battery cells 6 , In particular, lithium-ion cells comprises, which are connected in parallel and / or in series with each other electrically.

2 shows in this respect a first advantageous embodiment of a battery module designed according to the invention 5 in an exploded view, resulting in a method for producing the same results. After that, the battery module points 5 a cell carrier plate 7 with a plurality of battery cells 6 on that on the cell carrier plate 7 are arranged. The battery cells 6 each have a cell housing 8th and at least one cell wrap disposed in the cell housing 9 on. The cell carrier plate 7 may be an independent component or through a housing bottom of the battery case 4 be formed. The cell case 8th are integral with the cell carrier plate 7 formed, for example, by a 3D printing process or a known casting method of an electrically conductive, in particular metal material, such as aluminum or an aluminum alloy produced.

The cell case 8th are arranged parallel to each other and in each case by a starting from the cell carrier plate 7 orthogonal to the same extending tube 10 educated. The cell carrier plate 7 accordingly closes the said pipes 10 at one end, creating cup-shaped cell case 8th are formed. The cup-shaped cell case 8th have according to this embodiment, a circular cross-section and form with the respective insertable in the same cylindrical cell winding 9 a so-called round cell.

In the present case are the cell housing 8th spaced apart from each other. In contrast, the cell housing 8th be arranged to each other so that touch the adjacent wall sections or merge into one another, whereby a particularly stable composite is formed (not shown in the drawing). As already indicated above, the between adjacent tubular cell housings 8th to be recorded free spaces 11 for example, for temperature control of the battery cells 6 Use find the said free spaces 11 are flowed through by a Temperierungsfluid / are.

Every cell case 8th is a lid element 12 associated with that with the cell wrap 9 equipped cell housing 8th completely closes. Are as already indicated above, the cell housing 8th including cell carrier plate 7 made of an electrically conductive, in particular metal material, such as aluminum or an aluminum alloy, these preferably have a polarity, usually the negative polarity. A related first electrode connection 13 is present on the cell carrier plate 7 arranged. The of the respective cell case 8th electrically insulated cover elements 12 In contrast, each have a second electrode connection 14 with a positive polarity. This results in preferably a parallel connection of the battery cells 6 , The electrode connections 13 . 14 serve in particular to the battery module 5 in a module assembly of the battery 3 from two or more battery modules 5 electrically integrate or to contact with the same.

According to one in 3 shown, for the above-described embodiment of a battery module 5 Alternative embodiment, the plurality of cover elements 12 by a single, common cover element 12 ' replaced. The only cover element 12 ' therefore has the second electrode terminal 14 with the positive polarity. The only cover element 12 ' may according to this embodiment as a battery module in question 5 directly assigned cover element 12 ' act. In contrast, the only common cover element 12 ' also by a cover element 12 ' the battery 3 or its battery case 4 be formed and beyond two or more battery modules 5 the battery 3 be assigned (not shown in the drawing).

Furthermore, the invention is an alternative embodiment of a battery module according to the invention not shown in the drawing 5 detected by means of separate electrode connections 13 . 14 both polarities through either one of the respective cell housing 8th velvet cell wrap 9 completely closing lid element 12 or by a common, the cell case 8th velvet cell wrap 9 completely closing lid element 12 ' of the battery module 5 or at least one battery module 5 having battery 3 are provided. As a result, parallel and / or series connections of the battery cells 6 allows.

Furthermore, it can also be provided and is accordingly also covered by the invention that the cell carrier plate 7 including the cell case 8th and / or the cell case 8th closing lid elements 12 or a common cover element 12 ' formed electrically non-conductive, for example, are formed from a plastic or a fiber-reinforced plastic, but not shown in the drawing electrically conductive structure for electrical interconnection of the battery cells formed 6 having cell connectors and connecting elements, as in a known embodiment, for example, already with the DE 10 2008 059 967 A1 are disclosed. Again, both parallel and series circuits of the battery cells 6 allows.

The embodiments of the battery modules 5 after the 4 and 5 differ from the embodiments described above only in that the cell housing 8th have a polygonal, in this case rectangular cross-section, in each of which a flat wound cell winding 9 is arranged. Again, each cell case 8th a separate lid element 12 (see. 4 ) or all cell housings 8th a single, common cover element 12 ' ( 5 ) assigned or assignable.

The embodiments of the battery modules 5 after the 6 and 7 differ from the embodiments described above in that the only exemplifying tubular cell housing 8th with a circular cross section in each case through a cavity 15 in a common, compact block of material 16 the cell carrier plate 7 are formed. That is, the cell carrier plate 7 is dimensioned such that solely by, for example, mechanical processing of said block of material 16 like drilling or milling, the cup-shaped cavities 15 for the representation of the cell case 8th and recording the cell wraps 9 be formed. Accordingly, blind holes are formed so to speak. In contrast, such a compact cell carrier plate 7 also be produced by a 3D printing process or after a casting process. However, the invention is not limited to the exemplary round cells shown with a circular cross-section, but also includes round cells with rounded, for example, cylindrical cross-section or prismatic battery cells 6 respectively battery cells 6 with polygonal cross-section. Again, each cell case 8th a separate lid element 12 (see. 6 ) or all cell housings 9 a single, common cover element 12 ' ( 7 ) assigned or assignable.

The 8th and 9 show a second advantageous embodiment of an inventively designed battery module 5 in an exploded view, resulting in a method for producing the same results. The battery modules shown 5 differ to the embodiments described above essentially in that all cell housing 8th the majority of battery cells 6 in one piece by a single extruded profile 17 are formed by after the extrusion process, a plurality of parallel juxtaposed elongated cavities 15 for receiving the cell wraps 9 in the extruded profile 17 are formed. The extruded profile 17 is or by the same formed and integrally interconnected cell housing 8th are at one end by means of a separately manufactured and to the extruded profile 17 joined cell carrier plate 7 locked. The joining measure can be force, form and / or cohesive nature. The other end is every cell case 8th a separate lid element 12 (see. 8th ) or all cell housings 8th a single, common cover element 12 ' ( 9 ) assigned or assignable.

It is also common to all the embodiments described above that the cell carrier plate 7 at least one of a medium for temperature control of the battery cells 6 of the relevant battery module 5 flow-through channel structure 18 with at least one first Temperierungsmittelanschluss 19 as a lead and at least a second Temperierungsmittelanschluss 20 as reflux. The at least one channel structure 18 is preferred in a tempering, in particular cooling system of the vehicle 1 involved.

In a preferred, non-illustrated embodiment of the invention, the channel structure 18 in the cell carrier plate 7 integrated. According to a further, non-illustrated embodiment, the channel structure 18 by a separately prepared, to the cell carrier plate 7 tethered or attachable channel structure 18 formed with an example meandering course.

LIST OF REFERENCE NUMBERS

1

vehicle

2

electric motor

3

battery

4

battery case

5

battery module

6

battery cell

7

Cell carrier plate

8th

cell case

9

cell coil

10

pipe

11

free space

12

cover element

12 '

cover element

13

electrode connection

14

electrode connection

15

cavity

16

material block

17

Extruded

18

channel structure

19

Temperierungsmittelanschluss

20

Temperierungsmittelanschluss

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

• DE 102007010743 B3 [0002]
• DE 102008059967 A1 [0002, 0021]

Claims (12)

Battery module (5), with a cell carrier plate (7) and with a plurality of battery cells (6), which are arranged on said cell carrier plate (7), wherein the battery cells (10) each have a cell housing (8) and at least one cell housing (8). 8) arranged cell winding (9), characterized in that the cell housing (8) of the plurality of battery cells (6) are each cup-shaped and integrally formed with the cell carrier plate (7). Battery module (5) after Claim 1 , characterized in that the cell housing (8) formed have a round or polygonal cross section. Battery module (5) after Claim 2 , characterized in that each cell housing (8) by a starting from the cell carrier plate (7) orthogonal to the same and formed by the same end closed tube (10) is formed with a round or polygonal cross-section. Battery module (5) Claim 2 , characterized in that the cell housing (8) with a round or polygonal cross section in each case by a cup-shaped cavity (15) in a common, compact block of material (16) of the cell carrier plate (7) are formed. Battery module (5) after one of Claims 1 to 4 , characterized in that the cell carrier plate (7) together with the cell housing (8) is electrically conductive and by means of an electrode terminal (13) has a polarity of the battery module (5), whereas the other polarity by either an electrode terminal (14) one each respective cell housing (8) with cell winding (9) closing and to the cell housing (8) electrically insulated lid member (12) or by an electrode terminal (14) of a common, the cell housing (8) closing and formed to the same electrically isolated lid member (12 ' ) of the battery module (5) or of a battery (3) having at least one battery module (5). Battery module (5) after one of Claims 1 to 4 , characterized in that by means of separate electrode terminals (13, 14) both polarities by either one respective cell housing (8) including cell winding (9) closing lid member (12) or by a common, the cell housing (8) closing lid member (12 '. ) of the battery module (5) or a battery (3) having at least one battery module (5) are provided. Battery module (5) after one of Claims 1 to 4 , characterized in that the cell carrier plate (7) together with the cell housing (8) and / or the cell housing (8) closing lid elements (12) or a common cover element (12 ') are electrically non-conductive, but an electrically conductive structure for interconnection having the formed battery cells (6). Battery module (5) after one of Claims 1 to 7 , characterized in that at least the cell carrier plate (7) has at least one of a medium for temperature control of the battery cells (6) of the battery module (5) through-flow channel structure (18). Battery module (5), with a cell carrier plate (7) and with a plurality of battery cells (6), which are arranged on said cell carrier plate (7), wherein the battery cells (6) each have a cell housing (8) and at least one, in the cell housing (8) arranged cell winding (9), characterized in that the cell housing (8) of the plurality of battery cells (6) are integrally formed by an extruded profile (17) and that said extruded profile (17) connected to a separately prepared cell carrier plate (7) or connectable, which closes the cell housing (8) formed at one end. Battery (3), with at least one battery module (5) according to one of Claims 1 to 9 , Method for producing a battery module (5) according to one of Claims 1 to 8th characterized by the following steps: a) providing a cell carrier plate (7) which integrally has a plurality of cup-shaped cell housings (8), b) equipping the cell housings (8) with at least one cell coil (9), and c) closing the cell housings (8) each with one or a common cover element (12, 12 '). Method for producing a battery module (5) according to Claim 10 characterized by the following steps: a) providing a cell carrier plate (7), b) providing an extruded profile (17) which integrally forms a plurality of cell housings (8), c) closing the cell housings (8) formed at one end by means of the cell carrier plate (7), d) equipping the cell housing (8) formed with at least one cell winding (9), and e) closing the cell housing (8) at the other end with one or a common cover element (12, 12).

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