FI74363C - BATTERY BATTERY RETAIL SAETT ATT FRAMSTAELLA DETSAMMA. - Google Patents

Description

1 74363

The present invention relates to a battery and a method of manufacturing a battery. More specifically, the invention relates to a battery consisting of a plurality of cells and associated plate packs covered by a battery cover, the plate pack being housed in the cell chambers of a battery container and each plate pack being provided with two poles 11a 11a and each pole. The connecting bolt 11a and the battery cover are welded to the battery container, the battery cover being a prefabricated cover provided with openings corresponding to the connecting bolts and a lead sleeve 11a molded into the wall of each such opening, the cover further having molded connecting members for conducting electricity between the two different cells of the battery via the connection bolt of these cells, in addition to which the connection bolts are passed through their own opening in the battery cover and the lyi sleeve in the opening wall and the corresponding connection bolt there is a fusion weld; and the battery has end poles conductively connected to the battery. to the hub bridge in the main cell.

: Battery batteries are already known in which connecting means are arranged in the battery cover part between the connection bolts of two adjacent cells. The disadvantage in this case is that it is difficult to achieve a satisfactory seal between the connecting member and the surrounding material. Such sealing is necessary to prevent the sulfuric acid of the battery from creeping through the gaps between the connector and the substance between the two cells, resulting in a voltage drop.

It has now been found that this drawback can be substantially reduced by using a prefabricated battery cover in the manufacture of the battery, which is provided with openings corresponding to the connection bolts and a wedge wedged into the wall of each such opening. Such a battery cover can be made of a permanent filament, preferably polypropylene, by injection molding, whereby the lead sleeves are connected very closely and absolutely liquid-tight to the surrounding material. When such a prefabricated battery cover is placed on top of a corresponding battery container containing disk packs and welded pole bridges from which exit bolts exit each passing through their own opening in the battery cover and the cover is welded to the top of the container, preferably so-called by butt welding, a fusion weld can be made between the lead sleeve in the wall of each respective opening in the battery cover and the connecting bolt passed through the opening. The fusion weld connection can be obtained by fusing part of the lead of the connecting bolt so that it fills the annular space between the outer side of the connecting bolt and the outer wall of the lead sleeve. The connection can be made by high-frequency induction welding1a. The new battery also enables a very rational manufacturing method that can be easily adapted to the conveyor belt principle.

U.S. Pat. No. 2,100,333 discloses a battery of the type initially described, the lid of which consists of one piece and is attached to the battery container by some kind of gluing 1a. The purpose of shaping the cover in one piece is to achieve technical advantages - to avoid casting the cover on site. According to the patent publication, it is important that, when casting a lid, sleeves with connecting members are embedded in its mass of material. There are also such countersunk sleeves for the end bolts. When replacing the cover at the top of the battery container, insert the connecting bolts and end bolts into their respective bushings on the cover. Once the lid has been glued with a suitable glue, the bolts are heated by lead firing to a temperature that burns into their sleeves.

According to the present invention, the battery cover has end pole bolts molded to it from a portion of the bolt. In each particular case, the terminal bolts are connected to the connection bolt at the same time as the cover by a molded connecting member, the connecting bolt being attached to its respective terminal in each battery terminal. It is a known fact that in the manufacture of batteries, the manufacture of terminal bolts at the manufacturing site involves a smelting operation that requires care and precision. The advantage of the battery according to the invention is that due to its structure the end pole bolt can be provided in connection with the molding of the cover and that an electrical connection is made by a lead connection between the lead sleeve of the cover opening at the end cells and the closest connection bolt through the opening. The current flow to the terminal bolts n can thus be provided in the same or substantially similar way as the connection between the cells of the battery cells. It is entirely possible to use the same tool to achieve all the molten welds of the battery in one operation.

Based on the above, the initially defined battery is characterized in that each end terminal bolt of the battery is attached to the battery cover by molding a part inside that part connected to the opening for the connection bolt from the second terminal bridge of the end cells by a molded connector. between the lead sleeve and the connecting bolt is sul ahi tsili i to s.

According to an embodiment of the invention, the connection between the battery connection bolts and the corresponding battery cover sleeve is formed by a fused plug. For this purpose, the top side of the battery cover may have a rotating ridge around the opening for each connection bolt to form a dam-like space and that this space and the space between the connection bolt and the lead sleeve in each opening wall is filled with a previously fused and solidified plug.

4 74363

The invention also comprises a method of manufacturing accumulator batteries consisting of a plurality of cells and associated plate packs covered by a battery cover, wherein the plate packs are placed in the cell chambers of each battery container and each plate pack is provided with two pole bridges and a pole bridge 11 , after which the battery cover is welded closed. The method is characterized in that a battery cover is used which is a prefabricated cover provided with openings corresponding to the connecting bolts and a lead sleeve molded into the wall of each such opening and having a reversible ridge with a flat top surface around each connection bolt opening. in addition, there are molded connection members and terminal poles which allow current to be conducted between the two different cells of the battery through the connection bolt of these cells and between the terminal terminals and the nearest connection bolt in the terminal cells, and that the connection has been passed through its respective opening in the battery cover, each connecting bolt is heated by high-frequency induction welding to melt a part of it into the dam state and to form a uniform plug of the material thus melted and the opening wall of this lead sleeve in one piece with the corresponding connecting member.

The invention will now be described in more detail with reference to the accompanying drawings, in which Fig. 1 shows a partially sectioned perspective view of a battery according to the invention with the cover removed, Fig. 2a shows a section through the cover of Fig. 1, Fig. through the filling and adjusting hole (line AA in Fig. 5), Fig. 2c shows a section made through the top of the battery and the connection bolts, Fig. 3 shows a section similar to Fig. 2b made along the line AA in Fig. 5 with an electrical connection formed between the two cells , Fig. 4 shows a perspective view of a fastening element used in a battery according to the invention, and Fig. 5 shows a top view of a battery which is not already installed and to which the battery cover is attached.

As shown in Fig. 1, the battery according to the invention consists of a battery container 10 with an upper flat edge surface and a battery cover 11 with a lower flat edge surface, whereby both surfaces are attached to each other by a so-called Hot-tool. The figure also shows a separate lid 12 for each of the parts shown. The battery container 10 is elongate and is divided partly by a partition wall passing through the longitudinal plane in the imaginary plane and partly by two partitions arranged in the transverse plane so that the container contains six cell chambers. Each cell chamber includes a plate pack comprising a plurality of negative plates 13 and a plurality of non-shown positive plates with separators 14 therebetween. Each plate is conventionally provided with a power lug 15. Each power lug 15 of the negative plates 13 is conductively connected to the first 6 74363 pole bridge 16 and positive plates. each current lug 17 is connected to a second pole bridge 18, the pole bridge of the main cell being indicated by the number 18a. Each pole bridge has its own connection bolts 19 and 19a, respectively, which are intended to be connected to each other by means of cast lead elements in the battery cover 11, as will be described in more detail below. The battery box also has end pole bolts, one of which is marked with the number 20.

The battery cover 11 is initially made as a separate prefabricated element, the appearance of which is shown in Fig. 1 in the case of devices on the top side and in Fig. 2a in the case of molded-in connectors, while Fig. 3 shows the state of the battery with power connections. .

The battery cover 11 has a number of openings for two different purposes, namely partly openings 21 for the passage of the connecting bolts 19 and partly openings 22 for allowing the battery to check the acid level and to fill the electrolyte (sulfuric acid). Both types of openings are positioned and oriented relative to each other as shown in Figure 5. Thus, the electric current flows in the battery from the second terminal pole bolt 20 through the terminal connection member 29a in the prefabricated cover 11 to the terminal terminal bolt 28 closest to it, and then to the pole bridge and plates connected thereto. The current from the plates of the pole bridge then continues to flow from the pole bridge of the plates of opposite polarity, and is collected by a connecting bolt passed through the opening 27. The plates and the separators between them and the associated pole bridges as well as the connecting bolts form a cell in the battery. In the present case, as mentioned, the battery 7 74363 has six cells, in which case only the cells in the vicinity of the terminal bolts are shown in the figure. Current flows from a cell with openings 27, 28 to an adjacent cell with an opening 21 for a corresponding connecting bolt, through a connecting member 29 adapted to pass through the transverse partition 30 of the battery cover 11.

From the connecting bolt passing through the opening 21, current flows through the intermediate cell and further to the main cell and from this main cell back to the adjacent main cell and two other cells, one with an opening 26 for the connecting bolt and the other with two openings 25, 24 each for its own connecting bolt. Current flows out through the terminal bolt, which thus has the opposite sign of the terminal bolt 20.

The upper surface of the battery cover 11 has a system of ridges with a flat upper surface. The system includes partly first ridges 31 around each opening of the connecting bolt 19 at a relatively low level, partly second ridges 32 around the first ridge 31 with a flat surface at a slightly higher level, and partly third ridges 33 with a flat surface at the same level as the other ridges. The second 32 and third ridges 33 are intended to be welded on their flat surface to the surface adjacent the cover 12. The first ridge 31 is intended to form a cast dam that collects molten lead when forming a connection between the connection bolts 19 of two adjacent cells and a connection between the terminal connection bolt 28 (24) and the end pole bolt 20 (23) via the terminal connection members 29a. Both joints are fusion welded joints. The second ridges 32, for which the first ridge 31 is arranged in each case in connection with the connecting bolt 19, form a closed chamber for the electrolyte, i.e. sulfuric acid, which, by creeping between the connecting element 29 between the two cells and the surrounding substance, forms in any gaps that may circulate between the cells. At both end pole bolts 24, 28, a third ridge 33 is connected to the second ridge 32 as a closed chamber.

After the third weld, the third ridge 33 and the second ridges 32 form a closed duct system for collecting the charge gases, which gases can be removed through a central outlet. The cover 11 is further provided with fourth ridges 34 having a flat surface at the same level as the flat surface of the second 32 and third ridges 33, associated with each plug of the cover 12. The flat surface of the fourth ridge 34 is also welded to the corresponding surface of the cover 12 when the battery is ready. It forms a sleeve into which the corresponding internally threaded part of the cover 12 is inserted and forms the seat of the battery plug. The sleeve is split in the axial direction so as to form an outlet 37 for charge gases which are collected in the duct system formed by the third ridge 33 and the second ridges 32 and discharged therefrom through a central outlet which can be closed by a plug 38.

In the manufacture of batteries, the so-called a fastening element 39, the appearance of which will be seen in more detail in Figure 4. The element is a plate-like member with a lattice-shaped central portion 40 and a flanged side portion 41 associated with each side of the central portion. 43 is intended for the passage of a connecting bolt 19 from the pole bridge of the battery cell. For each hole 43, a sealing ring 44 is provided, which is supported by three resilient arms 45 arranged along a circumferential line defining the hole and having an angle of 120 ° between them. The fastening element further has a transverse flange portion 46, the major surface of which forms a right angle with both side portions 41. The central part 40 formed by the grid has a circular opening 47, the function of which is to act as a monitoring element for the electrolyte level of the corresponding battery cell in the finished battery during inspection and filling with liquid. The fastening element also plays an important role in the manufacture of the battery, which will be clear from the following.

In the manufacture of a battery according to the invention, the starting point is a battery container 10, which is divided into six cell chambers by means of a longitudinal partition and two transverse partitions, one of which is marked with the number 48. A so-called a plate pack consisting of negative plates 13 and positive plates with separators 14 between them. As shown in Figure 1, each plate pack rests on cross-members 49. The plates 13 having the same polarity and the associated current lug 15 have previously been provided in a separate working step by casting a pole bridge 16 and a corresponding connecting bolt 19.

To ensure that the plate pack can be placed in its own cell chamber with a simple grip and without using too much manual force, the pack is placed in the chamber so that a certain clearance is left between the outer side of each terminal plate and the adjacent wall. If no measures were taken to compensate for this clearance, difficulties would later arise in the work step in which the battery cover 11 is placed in place by welding, so that one surface thereof rests on the upper edge of the battery container. In this case, it would be necessary to check the position of each plate pack so that the corresponding connection bolts fit into the corresponding opening in the battery cover. To avoid this drawback, the fastening element 39 is therefore placed narrowly in each cell of the battery container, fitting into each chamber. In this case, each connecting bolt 19 is passed through its respective hole 43 in the fastening element, so that the sealing ring 44 rests resiliently on the outside of the bolt. The transverse flange part 46 contributes to the good stability of the fastening element. The location of the fastening element 39 in the battery container is shown in Fig. 3, which shows in particular the location of the opening 47 in the lattice-like central part 40. The opening 47 can be used as an electrolyte level adjusting and monitoring member after removing the battery plug 36. The battery cover 11 can now be very easily placed in place for welding. To weld it to the battery container, a conventional mirror welding technique is used, according to which a heated welding plate with recesses for protruding parts is brought into contact with the upper edge of the battery container 10 formed by a flat surface and the lower side of the battery cover 11 with a mirrored flat surface. flat surface of the battery container. As soon as the welding plate has sufficiently heated both flat surfaces, the plate is removed, after which the battery container and the battery cover are brought together so that a weld seam is formed.

During the next work step, the battery connections are made. For this purpose, lead sleeves are molded into the prefabricated battery cover 11, the inner side of which forms the wall of the opening in the cover for the connecting bolt 19. In order to provide the necessary electrical connection between the two connection bolts 19 on both sides of the battery partition 48 11 74363 and between the terminal bolt 20 and the terminal connection bolt passed through one of the openings 24 and 28, lead sleeves 50 are cast in the prefabricated battery cover 11. on top of the paris toast 10. The lead sleeve in the openings 20, 23 through which the terminal connection bolt 19a is intended to be inserted is indicated by the number 50a. A connecting member 29 is also molded between these lead sleeves 50. The lead sleeve 50 in the opening of each terminal connection bolt 19a also leaves the molded terminal connection member 29a (see Fig. 5) for the electrically closest end terminal bolt 20 or 23.

In order to provide the necessary electrical connection between each connecting bolt 19 and 19a, respectively, and the lead sleeve 50 and 50a respectively in the opening 11 of the cover 11, the lower part of the opening through which the connecting bolt 19, 19a passes forms a sealing ring 44 belonging to the seat fastening element 39. At the same time, the first ridge 31 forms a dam which collects molten lead. High-frequency induction welding now melts as much lead as is needed to fill the space between the surrounding lead sleeve 50, 50a in the opening through the connection bolt 19, 19a and the battery cover 11 and the dam-like space formed by the first ridge 31. A fusion weld joint is thus formed between the connecting bolt 19, 19a and the associated lead sleeve 50, 50a, as a result of which the lead becomes excellently well connected to the surrounding material. In this case, the risk of electrolyte transfer between the two connecting bolts 19, 19a is extremely small. The method can use automatic welding tools with induction elements that can be easily brought into contact with the lead being fused. The welding step can also be rationalized by using a welding tool with induction elements that form all the welds required in the battery in one step. To extend the electrolyte creep path between the two connecting bolts 19, 19a, the lead sleeve in the opening of the cover 11 may be provided with a bulge 56. This contributes to providing a solid connection between the lead sleeve 50, 50a and the surrounding material.

For finishing the battery, the cover 12 shown in perspective in Fig. 1 and in section in Fig. 2a is now placed in place on the cover 11, forming a ductwork at the central discharge point for collecting the charge gases to be removed and closed chambers for collecting any electrolyte. This work step is also carried out by mirror welding according to essentially the same technique as described above in connection with the welding of the lid 11 to the battery container.

It may be desirable to replace the sealed battery plug 36 shown on the left in Figure 2, which is suitable for the case of using medium degassing of charge gases by collecting gases in a duct formed by the second ridges 32 and the third ridge 33, a gas permeable plug 51 of the type shown at right. . Such a plug is divided from the inside into two spaces separated by a conical septum 52 and an upturned spout 53 located in the opening of the septum 52. The upper of the spaces 54 divided by the septum 52 acts as a separation chamber for separating the sulfuric acid droplets accompanying the charge gases. The liquid contained in these droplets is adapted to drain back through the slit in the nose 53 and the extension of the conical septum 52. In order to ensure that the charging gases containing the electrolyte droplets actually pass through the separation space 54 of the plug 51, a conical seal 55 is fitted in the battery cover in connection with the opening 22 for the insertion of the battery plug. This seal abuts the sealing surface at the outermost end of the extension of the conical septum 52 of the battery plug and thus directs the gases containing dispersed acid droplets to the separation chamber 54.

A conical seal 55 is also shown for the sealing plug 36 in connection with the opening on the left in Figure 2b. In this connection, however, it is turned downwards so as to leave the channel free through the slot 37 of the circular fourth ridge 34, so that there is a connection to the ductwork formed by the second ridges 32 and the third ridge 33, which communicates with a common outlet 38.

Claims (4)

A battery pack comprising a plurality of packs and associated disk packs, the cells being covered by a battery cover (11), the disk packs being located in the cell chambers of the battery container (10) and each disk pack being provided with two pole bridges (16, 18) and a pole bridge the connection bolt (19) and the battery cover (11) are welded to the battery container (10), the battery cover (11) being a prefabricated cover provided with openings (21, 24-28) corresponding to the connection bolts (19) and each such opening (21, 24). -28) a wall-molded lead sleeve (50), the cover (11) further having molded connecting members (29) which allow electric current to be conducted between two different cells of the battery through the connecting bolt (19) of these cells, in addition to connecting bolts ( 19) is passed through its own opening in the battery cover (11) and there is a fusion weld connection between the lead sleeve (50) in the wall of the opening (21, 24-28) and the corresponding connecting bolt (19), in addition to which the battery a are terminal bolts (20, 23) conductively connected to a terminal bridge in the second terminal cell of the battery, characterized in that each terminal pole bolt (20, 23) of the battery is attached to the battery cover (11) by casting a part inside that part ) by means of a molded connecting member (29a) connected to a lead sleeve (50a) in the opening (24, 28) in the battery cover (11) for the connecting bolt (19a) from the second terminal bridge (18a) of the terminal cells and that between the lead sleeve (50a) and the connecting bolt (19a) is a fusion weld joint. Battery according to Claim 1, characterized in that the upper side of the battery cover (11) has a circumferential ridge (31) around the opening (21, 24-28) for each connecting bolt (19, 19a) to form its space 74363 and that this space and the space between the connecting bolt and each of the lead sleeves (50, 50a) in the wall with openings (21, 24-28) are filled with a previously molten and solidified plug which is the same piece as the associated connecting member (29, 29a). Battery according to Claim 1 or 2, characterized in that the cover (12) is arranged on the cover (11). 4. A method of making a battery consisting of a plurality of cells and associated plate packs covered by a battery cover (11), the plate packs being placed in the cell chambers of a battery container and each plate pack being provided with two pole bridges (16, 18, 18a) and 18 pole bridges 18a) after which the battery cover (11) is welded to the so-called mirror welding, characterized in that the battery cover (11) is a prefabricated cover provided with openings (21, 24-28) corresponding to the connection bolts (19, 19a) and a lead sleeve (50, 50a) cast in the wall of each such opening and the upper side has a rotating ridge (31) with a flat upper surface around the opening (21, 24-28) of each connecting bolt (19, 19a) to form a path-like space, the cover (11) further having molded connecting members (29, 29a) and terminal bolts (20, 23) for conducting current between two different cells of the battery through the connection bolt (19, 19a) of these cells and for conducting current between the terminal bolts (20, 23) and the nearest connection bolt (19, 19a) in the main cells, and that after the mirror-welding butt welding step, at which time the connecting bolts (19, 19a) have been inserted into the corresponding aperture • * "· · ****. ··· * ·· β ...... '· ·: · '· - ... * · "*: ···. '·· * ........: .. · · .. *' 6 74363 sa (21, 24-28) through the battery cover (1), each connecting bolt (19, 19a) is heated by high frequency induction welding to melt a part of it into a dam to the space and to form a unitary plug of the molten material and the lead sleeve (50, 50a) in the wall of the opening in one piece with the corresponding connecting member (29, 29a). 0 17 7436 3