DE7229902U - Transfer nozzle for transferring electrolyte from a container into vessels of electrochemical accumulators with charged electrodes - Google Patents

Description

i 4 j. a

_R. 1 O 2 u
July 25, 1972 Zr / Kb

Attachment to

Patent and

Utility User Auxiliary Registration

ROBERT BOSCH GMBH, 7 Stuttgart 1

Transfer nozzle for transferring electrolyte from a container into vessels of electrochemical accumulators with charged electrodes

The invention relates to a tubular transfer neck for transferring 'electrolyte from a Containers in vessels of electrochemical accumulators with charged electrodes, which cut at its one Endab ;. has an internal thread that fits the external thread of the electrolyte container.

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Robert Bosch GmbH R. 10 2 8 Zr / Kb

Stuttgart

For some time now, so-called "battery sets" have been sold on the market, which consist of a electrolyte-free electrochemical accumulator with charged electrodes and at least one container with the electrolyte liquid; The battery and the electrolyte container are packed in a common cardboard box. Before the battery was put into operation, a screw cap was previously removed from your electrolyte container and a screw cap with a pipe socket was screwed on in its place, onto which a drainage hose for filling the electrolyte was screwed In a simpler embodiment of the screw cap, instead of the drainage hose, only an extended pipe socket was provided for pouring the electrolyte into the cells of the accumulator. Both solutions, however, have the disadvantage that if electrolyte is carelessly or improperly poured into the cell vessels, electrolyte splashes can get onto skin and clothing, which can cause considerable damage as a result of their corrosive effects ; the handling of these screw caps, which have been known since then, therefore requires very great care.

The invention is therefore based on the object

: To create transfer necks that are safe and easy to use ^ S;:; * .λ Transferring electrolyte from a container into vessels of

electrochemical accumulators allowed and the above In addition, it is simple to build and inexpensive.

This object is achieved according to the invention in that the tubular transfer nozzle has an external thread at its second end section like a rechargeable battery sealing plug and that there is a cutting wedge in the longitudinal bore in the transfer neck in the area of the end section of the internal thread, that of one is essentially concentric around the longitudinal bore arranged pipe cutout is formed and its wedge

722S9Q2U.H72

I. · I

Robert Bosch GmbH R. -j ο.? 3 Zr / cb

Stuttgart

point i: i at least as far from the front face on this side

of the filler neck is set back like the height of a thread from the internal thread; the cutting edge of the cutting wedge lies in the preferred embodiment on the Inner wall of the outlet from the electrolyte container on when the transfer nozzle is screwed onto the electrolyte container -ist = In order to work safely with the transfer nozzle, it is also advantageous if it is attached to the End faces pointing ends of the external and internal thread j has sealing shoulders; the sealing shoulders can also be provided with a rubber washer or a sealing lip.

/ An embodiment of the invention is shown in the drawing shown and is described and explained in more detail below; show it:

1 shows a longitudinal section through a transfer nozzle according to the invention (shown in dash-dotted lines

a section of an electrolyte container and L ·; // a section of an accumulator vessel with "^ filling opening) and
- '- Fig. 2 shows the top view of the transfer nozzle according to Fig.

'. The transfer nozzle 10 shown in FIGS. 1 and 2 is in one piece and consists of the thermoplastic material Polystyrene; its longitudinal bore is denoted by 11 and has a diameter of 13 minutes at the lower end section the transfer nozzle 10 is provided with a metric external thread (I4l8) 12, with which it can be inserted into the filling opening 13 of a The accumulator vessel 14 shown in phantom can be screwed in. The upper end of the transfer nozzle 10 has a larger inside diameter than the lower end portion and has an internal thread (R25) 15 that fits onto the external thread

16 of an electrolyte container shown in phantom

17 can be screwed on. As a result of this change in diameter on

722f9 02 left

Re'pert Bosch GmbH R. f η 2 R Zr / Kb

Stuttgart

Transfer nozzle 10 has an inner shoulder 10 and an outer shoulder 19. A cutting wedge 21 protrudes from the inner shoulder 18 into the space 20 surrounded by the internal thread 15, the cutting edge 22 of which runs parallel to the longitudinal axis of the longitudinal bore 11 and the tip of which is 4 mm below the upper end face 2 '). The wedge angle 25 of the cutting edge 22 is approximately 60 °. The end face 26 of the cutting wedge 21 forms a wedge angle 27 of approximately 80 ° with the cutting edge 22; In addition, this end face 26 is beveled in the direction of the longitudinal bore 11 so that it forms a cutting edge 28. The general shape of the cutting wedge 21 corresponds to a pipe section arranged concentrically to the longitudinal bore 11 of the transfer nozzle 10. On the • inner shoulder l8 and on the outer shoulder 19 there is a sealing lip 29, which runs concentrically around the longitudinal bore 11 and which press sealingly against the unspecified end faces of the electrolyte container Π or the filling opening 13 of the accumulator vessel Ik. A knurling 30 facilitates the screwing operations. In the event that an electrochemical accumulator 1 * 1 with charged electrodes is to be filled with electrolyte from an electrolyte container 17, the sealing plug (not shown) must first be removed from the filler

To remove the opening 13 in the accumulator vessel 14 and instead screw in the transfer nozzle 10 with its external thread 12 '^x; the sealing lip 29 on the outer shoulder 19 presses on the accumulator vessel 14. The next step is to remove a screw cap (not shown) from the electrolyte container 17, whereby an aluminum foil (also not shown) becomes visible that covers the opening of the electrolyte container 17 keeps tightly and tightly closed. The electrolyte container is now held with its outlet opening facing downwards and its external thread 16 is screwed into the internal thread 15 of the transfer nozzle 10. In doing so, it reaches the tip of the chisel

722 * 9 & 2ι *. * 71

Robert Bosch GmbH Stuttgart

1 U 2 8 Zr / Kb

2 3 after about one revolution of the electrolyte container 17, the aluminum foil on the opening of the electrolyte c- DL-iMlter 17, cuts it and removes it on the occasion of one of the next revolutions of the electrolyte container Electrolyte-GJ '". ³ .'3 17 severed v / ird, no electrolyte r-'ίιΓ can enter the open, but only flow through the L'inf.sbohrung 21 in the accumulator vessel 1 ^ 4 V. 'further screwing the external thread 16 of the electrolyte container 17 into the transfer nozzle 10 presses the sealing lip 29 located on the inner shoulder 19 against the electrolyte container 17 and forms an additional sealing area. The air displaced from the accumulator vessel 14 escapes through the longitudinal bore 21 of the filler neck 10 into the electrolyte vessel 17 · - The knurling 30 on the filler neck 10 makes it easier to screw the filler neck 10 into the accumulator Gettiß 1H and unscrew it after the transfer process is complete ben from the accumulator vessel I ¹ I.

It should be mentioned that the transfer nozzle 10 according to the invention not only made of thermoplastic material but also of other electrolyte-resistant material, such as thermosetting plastics The cutting edge 22 of the cutting wedge 21 can also be inclined and with its wedge tip 23 more than one turn of the internal thread 15 from the end face 2'I stand back. The sealing lips 29 of the filler neck 10 can also be replaced by rubber washers.

Claims (1)

• · * t Robert Bosch GmbH R. 10 2 8 Zr / Kb Stuttgart claims 1. Tubular transfer nozzle for transferring electrolyte from a container into vessels of electrical accumulators with charged electrodes, which at its one end portion has an internal thread matching the external thread of the electrolyte container, characterized in that the tubular Transfer nozzle (10) at its second end section has an external thread (12) like an accumulator stopper and that a cutting wedge (21) is located in the longitudinal bore (11) of the transfer nozzle in the area of the end section of the internal thread (15), the one borrowed from one in the vies concentric to the longitudinal bore (H) arranged pipe section is formed and its wedge tip (23) at least as far from this side The end face (2'4) of the transfer nozzle (10) is set back, ie the height of one thread turn from the internal thread (15). ρ transfer nozzle according to claim 1, characterized in that its cutting edge (22) rests against the inner wall of the outlet from the electrolyte container (17) when the transfer nozzle (10) is screwed onto the electrolyte container (17). Transfer nozzle according to claim 1 or 2, characterized in that it is at the end faces (2 * 1.2T) leading ends of the external and internal thread (12,15) sealing shoulders (18,19). -7- Robert Bosch GmbH Η · 1 Π? ρ Zr / Kb Stuttgart Falling nozzle according to Claim 3, characterized in that each sealing shoulder (18,19) with a rubber washer or a sealing lip (29) is provided.