DE102008037040A1 - Distance plate for forming battery cell, has planar sections for profiling of plate in cross-section, where profiling is interrupted by recesses that are formed in longitudinal direction of planar sections in series - Google Patents

Abstract

The plate (1) has multiple planar sections (2-7) running to each other under inclusion of angles (alpha, beta) of less than 180 degrees, where the plate is profiled in a cross-section by the planar sections. The profiling is interrupted by multiple recesses (8, 9) extending into an angle inner space, where the recesses are formed in a longitudinal direction of the planar sections in series. The recesses are formed by a wall profile in the cross-section, where the planar sections are penetrated into the cross-section through the recesses. An independent claim is also included for a battery cell comprising an electrode plate.

Description

The The invention relates to a spacer plate, possibly a plurality of spacer plates, for forming a battery cell composed of individual electrode plates and / or a summary of battery cells, wherein the spacer plate in cross section through several including an angle of less than 180 ° to each other extending surface sections profiled.

Such a spacer plate is, for example, from the DE 20 2004 020 604 U1 known. The surface sections are rectangular in this known spacer plate to each other. Moreover, it is known from practice to provide a spacer plate of this type, in which the surface portions in cross section form trapezoidal profiles with each other. Although such spacer plates have a certain advantage in terms of transport volume. On the other hand, sometimes you do not want to provide excessive wall thicknesses, not the required stability can be achieved.

outgoing of the described prior art, the invention the task, a spacer plate or possibly a plurality of spacer plates, specify that with a favorable structure and cheaper Manufacturability is advantageously formed.

A possible solution to this problem is the subject matter of claim 1, wherein it is stated that the Profiling by several in the longitudinal direction of the surface sections formed in a row, projecting into an angular interior Indentations, which are preferably at least two in the cross section adjacent surface sections interspersed, interrupted is. This extending transversely to the profiling direction indentations on the one hand provide a desired stabilization of Surface sections to each other. Even with trapezoidal Cross sections can do so without being overly thick wall thickness is required, the desired Stability can be achieved. Nevertheless, the desired is also Stackability allows. Because even the indentations can be designed so that they fit together in the stacking direction. In addition, they still have the advantage that a slipping of the spacer plates is largely prevented in the direction of profiling. The disability handicap is not only advantageous in terms of transportation or a storage of the spacer plates, but also when inserting the spacer plates, because so easily two (or more) spacer plates height combined with each other can, with one on the other (lower) mediate can support the indentations.

If it is also preferred that a recess in each case at least passing through two adjacent surface sections in the cross section, so this is for the thus desired stability gain unnecessary. The indentations can increase the stability also by mere concern to each other (in the angular interior of the Profile).

The Distance plate may deviate from the already discussed cross-sectional designs (trapezoidal Profiling, rectangular profiling) also, for example, a triangular Have profiling. This is preferably a not continuously formed by surface sections triangle, ie for example, a profile open on the side of the hypotenuse.

Further Features of the invention are below, also in the figure description, often in their preferred assignment to that explained above Claim concept described, but they can also in one Assignment to only one or more individual features of this Claim or independently or in another overall concept be significant.

So it is preferred that a recess by a cross-section U-shaped wall course is formed. The indentation thus has two wall portions which form the U-legs on and a connecting wall area, corresponding to the U-web. As a result, in particular manufacturing technology Dent also advantageous in a production of the spacer plate train in plastic extrusion process. Into the the extruder leaving, still warm distance plate can through transverse Stamp or the like the desired indentation easily be introduced. Deviating from it, for example, a in cross section Be given a V-shaped wall course.

A In particular, indentation may also correspond to one (from the plane of the plate seen from) triangular or wedge-shaped surface, usually without actual peak education, shaped be. With regard to cross sections perpendicular to a longitudinal central axis Such a design (the longitudinal center axis than the Hypotenuse perpendicular cutting, through the - imaginary - tip the triangle forming straight line) would become U-courses with different lengths (to the top of the triangular or wedge-shaped Surface decreasing) U-webs result.

It is also particularly preferred that the profiling is trapezoidal. This means that no fully closed trapezoid is formed, but in any case three surface sections, which form in cross section three side sections of a trapezoid, while the fourth side portion is not formed. It is further preferred that a profiling is symmetrical to a longitudinal center line. In addition, the profiling is also preferably symmetrical to a cross-sectional plane of the spacer plate.

A another special teaching of the invention, which also detached in particular of the features described above and below can, concerns the measure that the wall of the spacer plate Has areas of different wall thickness. hereby can, with regard to a thin wall area, the heat transfer be promoted by the spacer plate. As a result of that only partially a thinner wall thickness provided training can be such that the desired Stability of the spacer plate not affected is. This is especially true if, as further preferred, a thin wall region is formed island-like. For example, circular or rectangular. In addition, too instead of a thin wall area in each case or alternately a passage opening, such as a bore may be provided. It is particularly preferred that the thin-wall areas are at approx. 10 to 80% of the total area of the spacer plate is formed are, d. H. from the total area the said percentage Take a share. In the specified percentage bandwidth are also all intermediate values, especially in 1/10% steps, and although restricted from the lower and / or upper limit, included.

One Thin wall region is particularly preferred by a depression educated. Here, the thin-wall areas over the entire distance plate starting from the same area be formed or alternately or in a certain rhythm of the opposite surfaces. Especially with an alternating formation of the thin sides of the Both surface sides of the spacer plate can also be made This further promotes the desired stability become.

Regarding The profiling is also preferred, that of these in cross section alternately far protruding formations is formed. That alternately wide projections here refers to a geometric midplane the spacer plate thus formed. However, this is further preferred Maintaining a total symmetrical design (related on a plane parallel to the plate plane). The design can also be asymmetric in that the edge areas are affected. For example, by the one edge area in a high position of the Profils ends, the other in a low position. This can be with regard to be advantageous to the stackability. Also the turns far projecting formations are preferably each trapezoidal in cross section shaped, in the sense indicated above. Here are the outer surfaces a smaller shape closely adjacent to said geometric Center plane of the profile arranged. Closely adjacent can here also mean that they coincide with the plane or into one Range up to 1/10 of the total thickness of the profile plate of this are removed in cross section. Also regarding this mentioned Range are again all intermediate steps, especially in 1/100-thickness increments (1/100 of the total thickness) of Profile plate, included in the disclosure. These too Features of the profiling with differently far protruding forms have particular independent significance, as well as for example without the indentations.

Further It is preferred that a spacer plate at the edge in profiling having trained groove. This is especially true if the opposite edge side not as a groove, but as is formed in the groove matching spring. this makes possible it is, for example., Several spacer plates next to each other positively connected to arrange, which in particular with the composition of the beginning said battery cells can be advantageous.

object The invention is also a battery cell, with a Plurality of electrode plates and / or a summary of battery cells, forming a battery, with respect to a horizontal Distancing the electrode plates to each other or the electrode plates to a cell wall spacer plates are provided, which in cross section by several, including an angle of less than 180 ° to each other extending surface sections are profiled.

In terms of such a battery cell, or a summary of battery cells, is proposed according to a further inventive idea, that is a first spacer plate on a lower, second spacer plate according to the first spacer plate transverse to an extension direction the profiling trained indentations supported. The first spacer plate, preferably both spacer plates, have corresponding Indentations on. This allows the spacer plates be placed in each other in the profiles and at the same time in the direction of profiling. As a result of that the gap filled by a spacer plate is, a spreading transverse to the profiling direction practically impossible, is therefore a reliable Mounting the spacer plates one above the other in the battery cell or the summary of battery cells given.

In addition, such spacer plates can be positive fit marginally in juxtaposition. In detail, offer themselves this to various possibilities. However, it is preferred that the form-fit composite is achieved according to tongue and groove connection.

below the invention is further described with reference to the attached drawing, however, which only relates to embodiments explained. Hereby shows:

1 a cross section through a spacer plate;

2 a perspective view of the spacer plate acc. 1 ;

3 a cross section through the article according to 1 respectively. 2 , cut along the line III-III in 2 ;

4 a cross section through the article according to 1 respectively. 2 , cut along the line IV-IV in 2 ;

5 a schematic representation of an assignment of two spacer plates according to 1 respectively. 2 ;

6 an alternative assignment of the spacer plates, in a representation according to 5 ;

7 a schematic side view of two superimposed in a battery cell spacer plates; and

8th a schematic arrangement as a section of a battery cell with two laterally formschlussverbundenen spacer plates.

Shown and described, first with reference to the 1 and 2 , a spacer plate 1 as used, for example, to form a battery cell. A plurality of battery cells collectively forms a battery.

In the cross-sectional view according to 1 it can be seen that the spacer plate 1 is composed of a plurality of trapezoidal profile sections a, b, which are each connected by a connecting portion c with each other.

The profile section a as well as the profile section b is composed in detail of three surface sections 2 . 3 . 4 respectively. 5 . 6 . 7 together, with the surface sections 2 . 3 respectively. 5 . 6 as well as the surface sections 3 . 4 and 6 . 7 each include an equal angle α and β, respectively. The angles α, β are obtuse angles. In the embodiment, they are about 115 °.

The spacer plate 1 also has a geometric center plane E. The area section 3 respectively. 6 as well as the connecting portion c each extend parallel to the geometric center plane E. It is a plane parallel to the plate plane (eg., Support surface).

The surface sections 2 . 3 . 4 form in cross-section together with an imaginary connecting line V a trapezoidal shape. The same applies to the surface sections 5 . 6 . 7 and the imaginary connecting line V 'too.

In the embodiment, the surface sections 2 . 3 and 4 respectively. 5 . 6 and 7 over the length of the profile (perpendicular to the drawing plane, in which direction they just form a surface) by indentations 8th . 9 interrupted. The indentations 8th . 9 run transversely to the profile extension. They are designed so that they each protrude into an angular interior, that is, the space in which the angle α or β is given.

The indentations 8th . 9 are in detail, such as 3 can be seen, from a cross-sectionally U-shaped wall section 10 formed the spacer plate.

Although in the embodiment only between the surface sections 2 . 3 respectively. 3 . 4 respectively. 5 . 6 respectively. 6 . 7 each to the same side (surface side) of the profile plate 1 formed recesses are shown, but they can also between the surface sections 4 and the surface portion in which the recess 14 (see below) is formed, be formed or between the latter surface portion and the surface portion 5 etc.

Over the profile length are a variety of such indentations 8th . 9 educated. In the longitudinal direction can be between the indentations 8th . 9 a distance A be verklicht which corresponds, for example, the 1- to 100-fold, or possibly more, of the below explained in more detail height height h. In this case, the disclosure also includes all intermediate values, in particular in 1/10 steps relating to the dimension h.

The measure h denotes the total thickness of a profile plate, measured transversely to the main extension direction of the profile plate (see 1 ). The main direction of extension is that in the installed state of the surface extension of an electrode plate 19 corresponding direction. It runs in the plane E.

How werter the embodiment can be seen, the indentations 8th . 9 concerning the U-thighs 11 . 12 connecting underground bridge 13 sloping from the surface section 2 to the surface section 3 or from the surface section 5 to the surface section 7 or vice versa, and this alternately, from the surface portion 4 to the surface section 2 or the surface section 7 to the surface section 5 ,

The underground bridges 13 However, they can also be formed horizontally, ie running parallel to the longitudinal center plane E. This would be both indentations 8th . 9 formed equal to each other.

Next is the 2 and 4 can be seen that, in the embodiment in the surface portion c, depressions 14 , which lead to thin wall areas, are formed. These thin wall areas are island-like, namely in the embodiment of circular depressions 14 educated. The sinking 14 is here formed by the profile outside, ie from the side of the surface portion c over which an adjacent surface portion no longer passes. Similarly, thin wall areas could also be applied to the surface sections 2 to 7 be educated.

Distance plates according to 1 respectively. 2 have the advantage in different ways - in the installed state - to be able to be directed against each other. Namely, what is shown here only schematically, according to 5 or 6 for example. This results in different total thickness or height dimensions h. This makes it easier to compensate for different distances in a battery cell with the same distance plates. Nevertheless, such spacer plates 1 be low priced to save space in terms of transport.

Of more importance is how 2 can be seen that at an outermost edge of a spacer plate 1 a groove-like recess 15 is formed, mating with a spring-like shape 16 on the opposite edge of the spacer plate 1 , So can several spacer plates 1 be plugged into each other to a broader overall distance plate 1 to reach.

Due to the indentations 8th . 9 can spacer plates 1 Also be arranged in height one above the other, so that they are not mutually displaceable. So can be filled by means of the same held spacer plates and heights different areas. At the same time, however, a displacement protection is also given transport.

Related to the 5 and 6 are various possible arrangements, directed against each other, two profile plates 1 shown. It is evident that through the same profile plates 1 in the different assignment according to 5 or 6 a different total depth of the profile T. T 'can be achieved in a simple manner.

In reference to 7 is in a cross-sectional side view, with only indicated side wall 17 a floor 18 and an electrode plate 19 , shown as two spacer plates 1 due to the indentations described 8th . 9 are held in superimposition against each other. A resulting due to the offset clearance can be compensated by bending, a spacer (for example, a section of a spacer plate) or another spacer plate.

In 8th is again shown only in schematic and partial illustration of a battery cell or a summary of battery cells (battery), such as two spacer plates 1 in juxtaposition groove / spring are connected.

Here, the measures according to 7 and 8th be provided combined.

All disclosed features are essential to the invention (in itself). In the disclosure of the application is hereby also the disclosure content the associated / attached priority documents (Copy of the advance notice) fully included, too for the purpose, features of these documents in claims present Registration with.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 202004020604 U1 [0002]

Claims (17)

Spacer plate ( 1 ), possibly a plurality of spacer plates ( 1 ), for forming a battery cell composed of individual electrode plates and / or a summary of battery cells, wherein the spacer plate ( 1 ) in cross-section through a plurality of surface sections, including an angle (α, β) of less than 180 ° to each other ( 2 . 3 . 4 ) respectively. ( 5 . 6 . 7 ) is profiled, characterized in that the profiling by a plurality in the longitudinal direction of the surface sections ( 2 . 3 . 4 ) respectively. ( 5 . 6 . 7 ) formed in succession, projecting into an angular interior indentations ( 8th . 9 ), each having a preferably two adjacent in the cross section surface sections ( 2 . 3 ; 3 . 4 ; 5 . 6 ; 7 ) interspersed, is interrupted. Spacer plate according to claim 1 or in particular according thereto, characterized in that a recess ( 8th . 9 ) by a cross-sectionally U-shaped wall course ( 10 ) is formed. Distance plate according to one or more of the preceding Claims or in particular according thereto, characterized that the profiling is trapezoidal. Distance plate according to one or more of the preceding Claims or in particular according thereto, characterized that the wall of the spacer plates areas of different wall thickness having. Distance plate according to one or more of the preceding Claims or in particular according thereto, characterized a thin-wall region is island-like. Distance plate according to one or more of the preceding Claims or in particular according thereto, characterized that the thin wall areas on 10 to 80% of the total area are formed. Spacer plate according to one or more of the preceding claims or in particular according thereto, characterized in that a thin-wall region is formed by a depression ( 14 ) is formed. Spacer plate according to one or more of the preceding claims or in particular according thereto, characterized in that from both flat sides against each other outgoing depressions ( 14 ) are provided. Distance plate according to one or more of the preceding Claims or in particular according thereto, characterized that the profiling formed from alternately projecting protrusions is. Distance plate according to one or more of the preceding Claims or in particular according thereto, characterized that the formations are each trapezoidal in cross section. Distance plate according to one or more of the preceding Claims or in particular according thereto, characterized that the outer surfaces of a smaller molding closely adjacent to a geometric cross-sectional mid-plane E of the profile. Distance plate according to one or more of the preceding Claims or in particular according thereto, characterized that the spacer plate is extruded. Spacer plate according to one or more of the preceding claims or in particular according thereto, characterized in that a spacer plate at the edge forms a profiling direction in the groove ( 15 ) having. Distance plate according to one or more of the preceding claims or in particular according thereto, characterized in that a spacer plate ( 1 ) at the edge a profiled in the direction of profiling spring ( 16 ) having. Battery cell, with a plurality of electrode plates and / or a summary of battery cells, wherein with a view to a horizontal spacing of the electrode plates to each other or the electrode plates ( 19 ) to a cell wall ( 17 ) Spacer plates ( 1 ) are provided and the spacer plates ( 1 ) in cross-section through a plurality of surface sections, including an angle (α, β) of less than 180 ° to each other ( 2 . 3 . 4 ) respectively. ( 5 . 6 . 7 ) are profiled, characterized in that a first spacer plate ( 1 ) on a lower, second spacer plate ( 1 ) according to the first spacer plate ( 1 ) formed transversely to an extension direction of the profiling indentations ( 8th . 9 ) is supported. Battery cell according to the features of the preamble of claim 15 or claim 15, characterized in that a first and second spacer plate ( 1 ) in juxtaposition randseitig form-fitting are connected. Battery cell according to claim 15 or 16 or in particular according thereto, characterized in that the form-fitting composite according to Tongue / spring connection is reached.