DE1796120C - Cell connection for a rechargeable battery and method for its manufacture - Google Patents

Description

35

The invention relates to a cell connection for an accumulator in a block box in which the cell poles of the pole bridge lie flat against the partition walls of the block box and the connection can be inserted between the cell poles through the hole in the partition. Also concerns the invention also provides a method for producing such a cell interconnection.

Cell connections of this type are for example from British patent specification 1,062,097 and from the French patent 1,454,362 known. The cell poles face the cell wall Side approaches that are pushed through holes in the partitions of the block box and be connected to cell connectors by resistance welding. Such an arrangement of the Approaches brings difficulties in inserting the plate blocks into the cells, since the approaches get caught on the upper edges of the partition walls. This also applies to a similar cell connection, which is described in Belgian patent specification 679,794. Admittedly, the approaches to the Cell poles for the cell connectors in this embodiment are kept flatter, but the one achieved by this is achieved Advantage bought with the disadvantage that filling material is now in the connecting holes of the partition walls must be used, which in turn is cumbersome and difficult. With one from the French Patent specification 1526547 made known Zelienverbindungen are due to the approaches Difficulties are overcome by the fact that the cell poles are not approaches for the cell connectors have, but provided with bores. According to the invention, this object is achieved in a Zelienverbindungen of the type mentioned because solved by that at least one, vorzugswei ?. both cell poles one the plane of the side of the cell connector facing the intermediate wall; Have a protruding approach that is connected to the cell pole (s) via a narrow neck part is. The object on which the invention is based is also achieved by a method in which the or the approaches in the cell pole or in the cell pole and in the openings in the partition pressed in and with the opposite cell pole or attachment by means of resistance welding be firmly connected.

The invention offers the advantage that the plate blocks are quickly and conveniently inserted into the cell housing because the approaches to the cell poles are facing away from the partition wall Side. Nevertheless, they can be moved under pressure in such a way that they enter the opening of the Partition and in contact with the complementary approach of the opposite cell pole to be printed. During the subsequent welding process on the cell poles, a reliable one becomes Cell connection established and at the same time the opening securely sealed in the partition.

An embodiment of the invention is described in more detail with reference to the drawing. It shows

Fig. 1 is a perspective view of a plate block with separators,

F i g. 2 is a perspective view of a block box in which only one set of plates is inserted;

F i g. 3 shows a section through several plate blocks of a block box in the state before execution of FIG Cell connection,

Fig. 4 is a partial view of the cell connection according to the invention immediately before the beginning of the final Resistance welding,

F i g. 5 is an enlarged view of a cell connector according to the invention;

F i g. 6 a section through the block cover and

F i g. 7 and 8 show a longitudinal section and a perspective view of a welding electrode.

In the drawing, a block box 11 is shown, which is made of rubber or a thermoplastic Material, such as polypropylene, is made. The block box contains partitions 12 that make it into six Subdivide cells. In each of the six cells, a plate block 13 is inserted, the upper edges of which

^ c except · the pressure is still during

Separators with a perforated slosh interruption of Stromn ^ ^ _{on periods, genuine.}

14 are covered. The plates each have a polarity of a period of time

the individual disk blocks are connected in parallel, «hold. _Zellenverb bind prepared indungen, and the four disk blocks Judges in the end. ^ ^{Εηη a "e.} '% Shown block cover on the cells of the block box 11 are accommodated, are 5 ^. ^^, J ^ The Blockdeckel23 is flat in each case with Pole bridges 15 connected, on which there are block boxes be estg _and cell poles 16 molded from one piece, if made of PoW ¹⁰ PJ _de * the _upper edge of the block which are in the ready-to-use condition of the cells in the angskante de at _{24 heH) those at} essentially parallel to the partition walls 12 ab * ^ast % ^on _r S _en ° of _the partition walls 12 stray ^{I0 den} ° ^b , ' Γι has six filling openings (not Se cell poles 16 are formed from one piece with the block cover 1 we tse ^^^ ßlockformten Approaches 31, 31a provided, which, as posed on ^), which : s ^^ _{befiflden outside can} best be seen from Fig. 5, are located on the surfaces facing away _{from the cover over the ^ ew ^^^ ^ ob projecting intermediate walls 12} the time and ^j n the " _hfährunge " 25 molded the lenpole 16 are located and with them take up as υ via a narrow 15 _hollow pin. The Ver-neck part 32 are connected, the one break point the jew ^ 'gen | forms S _dec kels with the block box welding of ^oil. * Block box and block - The plates have a polarity that is * »* && *» * in the end cells. g ^ brought _{into contact with} the block box located disk blocks are lids ™ t η V a hot plate zusammeng, connected to each other -through a connecting strap 15, * and evaluate ° after removal while the plates of the other polarity with the presses. _{Hch is more} moderate, that .. ·

SSSiΑ ^, ΛΑ *

The partition walls 12 have molded-in holes to _{it of course} , düfi.

on, which are arranged so that the ^lugs _{31 the a 5} stream hindurc ' ^izu _f ' ^ _di ; _{se in} the operations and holes are opposite when the disk blocks can be if Sewunscni, _verw ends. IX> are inserted into the block box 11. Since the at- tached tools ver ^ ^ ^ _welding , _K put themselves in relation to the partitions on the Mg- ' ^una ° _fii f _a use after the / -. The back of the cell connectors are obstructing trodes, which are si cn, 1 _dt

They do not insert the plate blocks into the presses of the _{outer body of} the block box. When all the plate blocks are The f-ieKuouc. _{surface) in the} with Hillc

are set, a tool 18 with a pair of a ski, ζ in _{sheet {eder} 62 is attached. The

Welding electrodes 21, 22 arranged so that the one | ^ch ; ^au , ^b _p ^e _r ⁶ ^ '" _spring 62 is pressed by the own welding electrodes 21, 22 on a pair of free ends of the_ di ^ _{ef 61!, t}

the approaches 31 are present. Then pressure is 35 ^Fe J ^Erk ™? _lt ⁿ ; f _n VveSellbaren grub screw 64, de exercised, which moves the lugs 31 against each other, "^ 'χ ^{3. 1} ' ^ cylindrical insert 66 in which it rests in the hole in the partition wall: z> _bore 65 ren in the body, as shown in Figure 4. During this stepped Teili65 «a» ^ ^ ^ ^ _{6ς /)} working cycle of each projection 31 into the hole of 61 hmemdruc ^ ^ _{that s |... e. the} cell pole 16

Cell pole 16 in and through it- 40 shown, \ ° ^a " ^S8 g" ^ia _arrangement is so trodden, pressed, and since each approach has a larger transverse » ^ut _D ^{n <} i ^mcn _e ^k ?";: oe ' the leaf spring 62 is first cut than the hole in the corresponding cell terminal that has at pivot Ben α ^^ ^ _{screw 64} 16, a tightly closing seat deflects in the opening and then u _^} ^ _aufbrin ,, _t

achieved for the cell pole 16. . set pressure on adjustment of the

If the tabs touch each other, is passed _{In this} typical Schweifctrom 45 can ^ This pressure ^ ^"3 ^ _6n, so that the lugs screw 64 S ^ean ^ ^rt _v ^ _rwendung of g in the Fi. Merge with each other and fixed to the züge- ^Be |? P ' ^e ' ^ if _t ^ "electrode and a power source belonging cell pole 16. The welding and 8 shown Itcn WeK _{of 2Q periodcn}

Process seals the hole at the same time, and therefore from 50Hz, while> a 1 _{f brachtf woci}

it is, although not shown in the drawing, ₅ o a force ■ w »n 315 bsu ^ ₅ J _f ^ ^ ^^ expedient, the cell poles with the approaches around the increase in the J ™ ', _{spring62 was} effected. It is necessary to form protruding rings which ^{penetrate into the R} " ^C "? 5 _de during a period of 60 peri-partition wall, the sealing of the then ^{w rd} ^ ^dhr ^ _{500 A} , and the hole in the partition wall support and also desolate a Current of ο _second n upright movement of the plate block in one direction 55 after the pressure is still weaker

prevent parallel to the partition wall. Received at one. Execution consist the antypical example was made using a Be ₁ e, ner end «n Aus u ag ^. ^. ^ ^

Power source of 50 Hz during a period of time sets 31 "nd de Zelienp _{the djc}

of 15 periods a pressing force of 900 k _P with the latter with holes _VC rsen ^^

Bracht, then during a period of 40 pen- 60 approaches 31 with press-tzemgq, _hewn

a stream of This modification changes while maintaining the pressing force

20 000 A passed through and after interruption of the ^W % ™ Jf "S ' _method such as the one described, the flow of current can still flow through the pressure during a period of time

margin of 15 periods a pressing force of 900 kp for A ^{usb! ld} »" 8 ^ JSS are applied, then for a period of 6 ₅ the wall e nß Blockkaswns g 40 periods while maintaining the pressing forces en if, for example, ^ ^1Z J, ^ _n *. Current of 20 000 A passed through and divided according to sub-division with 8 V tap

1 sheet of drawings

Claims (3)

Patent claims: 1. Cell connection for an accumulator in a block box, in which the cell poles of the S The pole bridge rest flat against the partition walls of the block box and the connection between the cell pole can be pushed through the hole in the partition, characterized in that that at least one, preferably both cell poles (16) one the plane of the intermediate wall (12) facing side of the Cell connector not have outstanding approach (31) with the cell pole or poles (16) is connected via a narrow neck part (32). 2. Cell connection according to claim 1, characterized in that the cell pole (16) protruding part of the approach (31) has a larger cross-section than the recess in the tent pole (16) has. so 3. A method for producing a cell connection according to any one of claims 1 and 2, characterized characterized in that the lugs (31) in the cell pole or in the cell pole (16) and pressed into the openings of the partition (12) and with the opposite Cell pole (16) or attachment (31) by means of resistance welding be firmly connected. are aligned with the hole in the partition are arranged and through which after inserting the plate blocks into the block box Plug is pushed through and connected by welding to form cell connectors. This kind of Cell interconnect is for large scale manufacturing not very suitable because a quick and automatic connection is not possible; because the individual Holes must be precisely aligned with one another before inserting the plug. The invention is based on the object of a to create cell connection to be established by resistance welding, which is not only possible without Can weld difficulties, but also allows easy insertion of the plate sets. Of course, the requirements for the cell compound according to the invention should also be met Sealing between adjacent cells is met