CN109119570B - Device for degassing electrochemical energy stores and pipe connector therefor - Google Patents

Abstract

The invention furthermore proposes a device for degassing an electrochemical energy store ( 2 ) with an exhaust pipe connection ( 3) with a pipe connector (4) fastened to the exhaust pipe connector (3), wherein the pipe connector (4) has a sleeve made of elastomer with a coupling section (7) (5), install the exhaust pipe (9) at the coupling section. It is advantageously provided that the coupling section ( 7 ) consists of a tubular coupling element ( 10 ) which consists of a material different from that of the sleeve ( 5 ).

Description

Device for degassing electrochemical energy storage devices and pipe connectors therefor

technical field

The present invention relates to a device for degassing an electrochemical energy store according to the invention. According to the invention, the invention furthermore relates to a pipe connector.

Background technique

JP 2002008603 A describes a power supply with a plurality of combined battery modules, the housings of which have corresponding exhaust pipe connections. The exhaust pipe connection is connected to a common exhaust pipe with a pipe connector designed as a sleeve and an intermediate connection through the sleeve. On the end side, the exhaust pipe is correspondingly pushed onto a sleeve-like pipe connector made of rubber, the material of which is formed uniformly and integrally to the corresponding connecting section of the exhaust pipe. The exhaust pipe has a high rigidity and should thereby increase the rigidity of the power supply. As a result, the requirement arises that the sleeve-shaped pipe connector must likewise have a relatively high rigidity, which is associated with increased material and weight.

SUMMARY OF THE INVENTION

The object of the present invention is to create an alternative device for the degassing of electrochemical energy stores in view of the prior art, which is optimized in view of materials, costs and assemblability while ensuring reliable degassing.

A device for degassing an electrochemical energy store with an exhaust pipe socket arranged on its housing and projecting from the housing and with a pipe connector fastened to the exhaust pipe socket Proceeding from the fact that the pipe connector has a sleeve made of elastomer with a coupling section on which the exhaust gas pipe is mounted, the proposed object is achieved in that the coupling section is formed by a coupling element It consists of a material different from that of the sleeve.

These measures advantageously make it possible, with minimal weight and material costs, to adapt the pipe connector or its coupling element to the corresponding exhaust pipe currently to be arranged.

The specification describes preferred refinements or designs of the invention.

Accordingly, the coupling element is connected to the sleeve in a form-fit, force-fit and/or material-fit manner and is therefore not limited to a specific joining measure. A preferred joining measure results in particular from the fact that the coupling element is threaded into the prefabricated sleeve as a separately produced component or is formed integrally with the sleeve, ie the coupling element is injected according to an injection molding process Into the sleeve or as an insert, where the sleeve is manufactured according to the above-described injection molding process, it is extrusion-coated with the sleeve material. Further preferably, the coupling element is formed by an angle piece (or elbow, ie Winkelstück), whereby a coupling for the exhaust pipe which requires as little installation space as possible can be achieved. In this regard, it is preferably provided that the coupling element formed as an angle piece is arranged relative to the housing of the electrochemical energy store in such a way that the end section axis of the coupling element is parallel to the exhaust pipe socket (preferably protrudes into it). On the other hand, the other end section extends parallel to the at least sectionally flat outer contour surface of the housing of the electrochemical energy store. The sleeve can thus be constructed very flat. A particularly advantageous embodiment of the invention results from the fact that the end sections of the coupling elements formed as angled pieces are arranged at an angle of 90° to each other. In order to facilitate the assembly of the pipe connector with the exhaust pipe, the exhaust pipe is designed at least in sections as a bellows and at least the coupling section of the coupling element is designed and provided for connection with the exhaust pipe which is designed at least in sections as a bellows. Connect the trachea. In this context, a corrugated tube is understood to mean a tube with a corrugated diameter made of a material as hard as possible, which results in a certain flexibility of the tube. In addition to the simplified assembly, in particular, of the bellows to the pipe connector, dimensional deviations or tolerances can also be corrected very well by this measure and/or the coupling points that deviate from each other can be handled to a limited extent as a result of the design. Furthermore, the possibility is opened that the sleeve together with the exhaust pipe can be provided as a module already assembled by the supplier, which can be easily and cost-effectively installed in the final assembly due to the configuration of the exhaust pipe as a bellows . According to a preferred embodiment of the invention, the sleeve consists of EPDM rubber (EPDM=ethylene-propylene-diene propylene rubber), whereas the coupling element and the exhaust pipe consist of PP (PP=polypropylene). EPDM has high heat resistance, high elasticity and good chemical stability. As far as PP materials are concerned, the material has good mechanical properties as well as good heat resistance.

The invention also relates to a pipe connector, which can be fastened to an exhaust pipe connection of a housing of an electrochemical energy store, with a sleeve made of elastomer with a coupling section in which the coupling section is located. An exhaust pipe can be installed at the section. The pipe connector is characterized in that the coupling section consists of a coupling element which is composed of a material different from the sleeve. This has the advantage that, with minimal weight and material costs, the pipe connector or its coupling element can be adapted to the corresponding exhaust pipe currently to be arranged.

Description of drawings

In the following, the invention is further explained with the aid of an exemplary embodiment which is shown very schematically in the single drawing. However, the present invention is not limited to this embodiment, but includes all designs defined by the description. FIG. 1 shows a device according to the invention for degassing an electrochemical energy store.

List of reference signs

1 shell

2 accumulators

3 Exhaust pipe connection

4-pipe connector

5 casing

6 Fixed section

7 First coupling section (coupling element 10)

8 Second coupling section (exhaust pipe 9)

9 Exhaust pipe

10 Coupling elements

10a End section

10b end section

11 Outer profile surface (shell 1)

12 tabs.

Detailed ways

FIG. 1 shows the housing 1 (dashed line) of the electrochemical energy store 2 in this regard. The above-mentioned electrochemical energy stores 2 are understood to be in particular batteries or accumulators, battery modules (in which, for example, a plurality of battery modules are formed into a battery), and single-chamber modules (in which, for example, a plurality of single-chamber modules are formed into a battery or a battery module) ).

The housing 1 has an exhaust pipe nipple 3 (dotted line) extending therefrom. A pipe connector 4 is fixed to the exhaust pipe connection 3 . The pipe connector 4 has a sleeve 5 made of elastomer, preferably EPDM rubber (EPDM = ethylene propylene diene propylene rubber), with a fixing section 6, by means of which the sleeve 5 is pushed up to the row. On the trachea tube 3. Due to its combination of elasticity and frictional fit, the sleeve 5 is held air-tight on the exhaust pipe connection 3 . The sleeve 5 is generally understood to be a tubular part.

The sleeve 5 has a first coupling section 7 , which, in contrast to the above-mentioned fixing section 6 , is arranged on the sleeve 5 and corresponds to a second coupling section 8 of the exhaust pipe 9 , where it can be fitted. According to this exemplary embodiment, the exhaust pipe 9 is formed at least in sections by a bellows preferably made of plastic, more preferably of PP (PP=polypropylene). However, the present invention is not limited to exhaust pipes 9 composed of plastic, but also includes exhaust pipes 9 composed of, for example, metal or a combination of such materials.

The first coupling section 7 of the above-mentioned sleeve 5 is formed by a tubular coupling element 10 , which according to this embodiment and preferably is formed by a tubular angle piece. The end sections 10a, 10b of the coupling element 10 configured as angled pieces are preferably arranged at an angle of 90° to each other. The advantages of such a device have been described above. In the tests on the subject of the application, a coupling element 10 which is made of the same material as the exhaust pipe 9 , that is to say likewise consists of PP (PP=polypropylene) proved to be suitable.

The first coupling section 7 is formed by an end section 10 b which extends approximately parallel to the at least sectionally flat outer contour surface 11 of the housing 1 of the electrochemical energy store 2 . The end section 10 a of the coupling element 10 protrudes into the exhaust pipe socket 3 according to the exemplary embodiment, extends almost axially parallel to the latter and is closed so to speak by the securing section 6 of the sleeve 5 . Thus, a forced guidance of the gas flowing out of the housing 1 of the electrochemical energy store 2 through the coupling element 10 is created.

The coupling element 10 can be connected to the sleeve 5 in a form-fit, force-fit and/or material-fit manner. Preferably, the coupling element 10 is extruded as a prefabricated insert with the sleeve material (in this case EPDM rubber) in the case where the sleeve 5 is produced according to an injection molding process, whereby a material fit between the spliced objects is obtained. sealed connection.

Alternatively, the coupling element 10 can also be threaded into a prefabricated sleeve 5 as a separately produced component, wherein the sleeve 5 abuts against the coupling element 10 at least in sections under pretension and thus A gas-tight splicing between the spliced objects is likewise produced. Furthermore, it may be advantageous and likewise included in the invention that the coupling element 10 is injected into the sleeve 5 according to an injection molding process, in particular a two-component injection molding process.

In order to obtain a reliable splicing or plug-in connection with the second coupling section 8 of the exhaust pipe 9 , which is designed as a bellows, the first coupling section 7 , which is formed by the end section 10 b of the coupling element 10 , is at its outer circumference. There is a circumferential web 12 , which, during assembly, penetrates in a form-fitting manner into the valleys of the inner surface of the second connecting section 8 , which is designed as a bellows.

Claims (9)

1. Device for degassing an electrochemical energy store (2), having a gas outlet connector (3) which is arranged on a housing (1) of the electrochemical energy store (2) and projects out of the housing (1), and having a pipe connector (4) which is fastened to the gas outlet connector (3), wherein the pipe connector (4) has a sleeve (5) made of an elastomer with a connecting section (7) at which a gas outlet pipe (9) is mounted, characterized in that the connecting section (7) is made of a tubular connecting element (10), the connecting element (10) being made of a material which differs from the sleeve (5), wherein the connecting element (10) is injected into the sleeve (5) according to an injection molding process, or the connecting element (10) penetrates into the sleeve (5) as an insert, in the case of the manufacture according to the injection molding process described above, the encapsulation is extruded with the sleeve material.

2. Device according to claim 1, characterized in that the coupling element (10) is connected with the sleeve (5) in a form-fitting, force-fitting and/or material-fitting manner.

3. Device according to claim 1, characterized in that the coupling element (10) is constituted by an angle.

4. Device according to claim 3, characterized in that the angled coupling element (10) is arranged relative to the housing (1) of the electrochemical energy store (2) in such a way that an end section (10a) of the coupling element (10) extends axially parallel to the exhaust gas stub (3) and the other end section (10b) extends parallel to an at least partially flat outer contour surface (11) of the housing (1) of the electrochemical energy store (2).

5. The device according to claim 4, characterized in that the end section (10a) and the other end section (10b) of the linking element (10) configured as an angle are arranged at an angle of 90 ° to each other.

6. The device according to any one of claims 1 to 5, characterized in that the exhaust pipe (9) is at least partially constructed as a bellows and at least the coupling section (7) of the coupling element (10) is constructed and arranged for connection with the exhaust pipe (9) which is at least partially constructed as a bellows.

7. The device according to any one of claims 1 to 5, characterized in that the sleeve (5) consists of EPDM rubber.

8. The device according to any one of claims 1 to 5, characterized in that the coupling element (10) and the exhaust tube (9) are made of polypropylene.

9. A pipe connector (4) which can be fastened to an exhaust pipe socket (3) of a housing (1) of an electrochemical energy storage device (2), having a sleeve (5) made of an elastomer and having a coupling section (7) at which an exhaust pipe (9) can be mounted, characterized in that the coupling section (7) is made of a tubular coupling element (10), the coupling element (10) being made of a material which is different from the sleeve (5), wherein the coupling element (10) is injected into the sleeve (5) according to an injection molding process, or the coupling element (10) penetrates into the sleeve (5) as an insert, is encapsulated in the sleeve material in the case of the above-described injection molding process.

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