DE202008018024U1 - spacer plate - Google Patents

Abstract

Spacer plate (1), possibly a plurality of spacer plates (1), for forming a battery cell made up of individual electrode plates and / or a combination of battery cells, the spacer plate (1) in cross section through several including an angle (α, β) is profiled by less than 180 ° mutually extending surface sections (2, 3, 4) or (5, 6, 7), characterized in that the profiling is trapezoidal, rectangular or triangular and that the spacer plates profiled in this way can be stacked to fit one another.

Description

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

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.

Based on the described prior art, the invention has the object, a spacer plate or possibly a plurality of spacer plates to specify, which is advantageously formed with a favorable structure and favorable manufacturability.

One possible solution to this problem is specified in the subject matter of claim 1, wherein it is pointed out that the profiling is interrupted by a plurality of recesses formed in succession in the longitudinal direction of the surface sections, projecting into an angular interior which preferably passes through at least two adjacent surface sections in the cross section , These recesses extending transversely to the profiling direction on the one hand provide a desired stabilization of the surface sections to one another. Even with trapezoidal cross-sections, the desired stability can thus be achieved without requiring an excessively thick wall thickness. Nevertheless, the desired stackability is also possible. Because even the indentations can be designed so that they fit into each other in the stacking direction. In addition, they still have the advantage that slipping of the spacer plates in the direction of profiling is largely prevented. The Verrutschungsbehinderung is not only advantageous in terms of transport or storage of the spacer plates, but also when inserting the spacer plates, as readily two (or more) spacer plates can be combined in terms of height with each other, one on the other (lower ) can support by means of indentations.

Although it is also preferred that an indentation in each case penetrates at least two surface sections adjacent to one another in the cross section, this is not necessary for the stability gain desired to that extent. The indentations can also promote stability by merely contacting each other (in the angular interior of the profile).

Deviating from the already mentioned cross-sectional configurations (trapezoidal profiling, rectangular profiling), the spacer plate may also have, for example, a triangular profiling. This is preferably a triangle which is not formed continuously by area sections, that is, for example, by a profile open on the side of the hypotenuse.

Further features of the invention are described below, also in the description of the figures, often in their preferred assignment to the above-described claim concept, but they can also in an assignment to only one or more individual features of this claim or independently or in another overall concept of meaning be.

Thus, it is preferred that a recess is formed by a U-shaped wall in cross section. The indentation thus has two wall regions, which form the U-legs, on and a connecting wall region, corresponding to the U-web. As a result, in particular, the indentation can also advantageously be formed during production of the spacer plate in the plastic extrusion process. In the extruder leaving, still warm spacer plate can be easily introduced by transverse punch or the like, the desired indentation. Deviating from this, for example, a cross-sectionally V-shaped course of the wall can also be provided.

In particular, a recess may also be shaped in accordance with a triangular or wedge-shaped surface (as viewed from the plane of the plate), as a rule without actual tip formation. With regard to cross-sections perpendicular to a longitudinal central axis of such a design (the longitudinal central axis as the hypotenuse perpendicularly intersecting, through the - thought - the tip of the triangle formation going straight line) U-curves with different lengths (towards the tip of the triangular or wedge-shaped surface towards 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 in the Cross section form 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.

Another particular teaching of the invention, which may also be particularly independent of the features described above and below, relates to the measure that the wall of the spacer plate has regions of different wall thickness. In this way, with regard to a thin wall area, the heat transfer can be promoted by the spacer plate. Due to the fact that a thinner wall thickness is only partially provided, the design can be made such that the desired stability of the spacer plate is not influenced by this. This is especially true if, as further preferred, a thin wall region is island-like. For example, circular or rectangular. In addition, instead of a thin-wall region, in each case or alternately, a passage opening, for example a bore, may be provided. It is particularly preferred that the thin-wall regions are formed to about 10 to 80% of the total area of the spacer plate, d. H. of the total area occupy the stated percentage. The specified percentage bandwidth also includes all intermediate values, in particular in 1/10% increments, restricted from the lower and / or upper limit.

A thin-wall region is particularly preferably formed by a depression. In this case, the thin-wall regions can be formed over the entire spacer plate starting from the same surface or alternately or at a specific rhythm from the opposite surfaces. In particular, with an alternating formation of the thin sides of the two surface sides of the spacer plate and thereby the desired stability can be promoted again.

With regard to the profiling is also preferred that it is formed of alternately in cross-section alternately far protruding formations. The alternately wide protruding here refers to a geometric center plane of the spacer plate thus formed. This further preferred, however, while maintaining an overall symmetrical configuration (relative to a plane parallel to the plate plane). The embodiment may also be asymmetrical in that the edge regions are affected. For example, by one edge area ends in a high position of the profile, the other in a low position. This can be advantageous in terms of stackability. The alternately projecting protrusions are preferably trapezoidal in cross-section, in the sense indicated above. Here, the outer surfaces of a smaller formation are arranged closely adjacent to the said geometric center plane of the profile. Closely adjacent may also mean that they coincide with the plane or are in a range up to 1/10 of the total thickness of the profile plate of this in cross section. Also with regard to this stated range indication, in turn, all intermediate steps, in particular in 1/100-thickness increments (1/100 of the total thickness) of the profile plate, are included in the disclosure. These features of profiling with differently far protruding shapes have particular significance, as well as, for example, without the indentations.

It is further preferred that a spacer plate at the edge has a groove formed in the profiling direction. This is especially true if the opposite edge side is not formed as a groove, but as a spring fitting into the groove. This makes it possible, for example, to arrange a plurality of spacer plates next to one another in a form-fitting connection, which may be advantageous in particular in the composition of the battery cells mentioned at the outset.

The invention further relates to a battery cell, with a plurality of electrode plates and / or a summary of battery cells, to form a battery, wherein in view of a horizontal spacing of the electrode plates to each other or the electrode plates to a cell wall spacer plates are provided in the Cross section are profiled by a plurality of surface sections including at an angle of less than 180 ° to each other.

With respect to such a battery cell, or a summary of battery cells, it is proposed according to a further concept of the invention that a first spacer plate is supported on a lower, second spacer plate formed on the first spacer plate transverse to an extension direction of the profiling indentations. The first spacer plate, preferably both spacer plates, have corresponding indentations. As a result, the spacer plates can be placed in each other in the profilings and at the same time but also be hauled stop in Profilierungsrichtung. Due to the fact that the intermediate space, which is filled by a spacer plate, does not permit a spreading apart transversely to the profiling direction, a reliable holding of the spacer plates one above the other in the battery cell or the summary of battery cells is provided.

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.

In the following, the invention will be explained further with reference to the attached drawing, which however relates only to exemplary embodiments. 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 can be realized which, for example, corresponds to 1 to 100 times, or possibly even more, of the height dimension h explained below in more detail. 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.

As can further be seen from the exemplary embodiment, the recesses run 8th . 9 concerning the U-thighs 11 . 12 connecting U- web 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. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. The subclaims characterize in their optional sibling version independent inventive development of the prior art, in particular to make on the basis of these claims divisional applications.

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 202004020604 U1 [0002]

Claims (18)

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 is trapezoidal, rectangular or triangular and that the thus profiled spacer plates are stackable in one another. Distance plate according to claim 1 or in particular according thereto, 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. Distance plate according to one or more of the preceding claims 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 in that the wall of the spacer plates has regions of different wall thickness. Distance plate according to one or more of the preceding claims or in particular according thereto, characterized in that a thin-wall region is island-like. Distance plate according to one or more of the preceding claims or in particular according thereto, characterized in that the thin-wall regions are formed on 10 to 80% of the total area. 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. Spacer plate according to one or more of the preceding claims or in particular according thereto, characterized in that the profiling is formed of alternately far projecting formations. Distance plate according to one or more of the preceding claims or in particular according thereto, characterized in that the formations are each trapezoidal in cross section. Spacer plate according to one or more of the preceding claims or in particular according thereto, characterized in that the outer surfaces of a smaller formation are closely adjacent to a geometric cross-section center plane E of the profile. Distance plate according to one or more of the preceding claims or in particular according thereto, characterized in 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 the profiling is trapezoidal, rectangular or triangular and that the thus profiled spacer plates are stackable nested. Battery cell according to claim 15 or in particular according thereto, 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 according to one of claims 15 or 16, characterized in that a first and second spacer plate ( 1 ) in juxtaposition randseitig form-fitting are connected. Battery cell according to one of claims 15 to 17 or in particular according thereto, characterized in that the positive connection composite is achieved according to tongue and groove connection.

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