CA1103307A - Inter-cell connector for storage batteries - Google Patents
Inter-cell connector for storage batteriesInfo
- Publication number
- CA1103307A CA1103307A CA308,813A CA308813A CA1103307A CA 1103307 A CA1103307 A CA 1103307A CA 308813 A CA308813 A CA 308813A CA 1103307 A CA1103307 A CA 1103307A
- Authority
- CA
- Canada
- Prior art keywords
- cell
- yoke
- cell connector
- pole pieces
- connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
- H01M50/529—Intercell connections through partitions, e.g. in a battery casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
ABSTRACT OF THE DISCLOSURE:
An inter-cell connector is formed by a yoke seated in a recess in the cell separating partition. The downward extending legs and pole pieces have encircling grooves and ribs. Plastic is molded around the connector.
An inter-cell connector is formed by a yoke seated in a recess in the cell separating partition. The downward extending legs and pole pieces have encircling grooves and ribs. Plastic is molded around the connector.
Description
1;1~3;3~7 The invention relates to a cell connector for lead storage batteries which passes through the cell separating partition and is sealed within the same through molding in plastic material.
It is known to connect, within a multi-cell storage battery, the positive and negative electrodes of each cell by means of their take-off vanes electrically and mechanically with a respective pole bridge. On its upper end the pole bridge has a current conductive projection, the pole piece.
The pole pieces of adjoining cells are connected to each other by means of a cell connector. To prevent unnecessary current losses it is desired to utilize cell connectors having the shortest possible current path~ or sufficiently great conductive cross-section.
In batteries of previously known construction the cell connectors are positioned above the battery lid so that the pole blidges of adjoining cells can be connected to the cell connectors only by means of relatively long projections -- the pole pieces ~ traversing the battery lid. The long current path which this produces and the inconYenience of making the various solder joints have led to many attempts to connect the pole bridges of ad-joining cells to each other in a more rational manner. Some solutions contemplated punching holes in the cell separating partitions at the level of the pole bridges, lowering the preassembled plate blocks into the cells, and welding together, through the opening in the cell separating partition, projections attached to the pole pieces.
In place of this welding technique it is particularly desirable to provide recesses in the cell separating partitions into which the cell connector which ties together two adjoining plate blocks is introduced from above. As described in German patent 1,804,800, this cell connector is then surrounded with molded plastic material, so that the recess in the cell partition is again filled in tightly. This technique is used particularly in the manufacture of starter batteries in large quantities.
11~33~7 It is an object of this invention to provide a cell connector construction which is particularly suitable for larger batteries.
According to the present invention there is provided a cell connec-tor for lead storage batteries which passes through the cell separating partition and is sealed therein through molding around with plasti~wherein the cell connector includes a yoke passing ~hrough the cell separating partition, the yoke being connected to pole bridges on both sides of the cell separating partition through pole pieces extending parallel to said partition and downwardly, and the pole pieces being provided with at least one encir-cling recess or protrusion.
In the accompanying drawings which illustrate an exemplaryembodiment of the present invention:
FIGURE l shows a view in perspective of an embodiment of the present invention;
FIGURE 2 shows a cross-section of the connector, and FIGURE 3 shows a top view.
In all of these figure~ there is shown a yoke l with legs connecting the adjacent pole pieces 2. From the lower end of these, the respective pole bridges or transition pieces 3 angle away. Each of the two pole pieces 2 is provided with a series of encircling grooves or recesses 4 which extend perpendicularly to the axis of the pole pieces. Between the recesses are encircling protrusions. By providing a plurality of alternating recesses and protrusions, the p~le pieces are given, as is particularly visible in Figure l, a ribbed configuration with a large surface area. Similarly the upper edge of yoke 1 may be provided with a plurality of recesses or protru-sions 41. In addition, yoke l has in its middle a vertical through passage 5.
The rectangular cross~section of the pole pieces such as illustrated in ~igure l may be replaced by an elliptical configuration. For streSs-free shrir~ ng-on of the plastic material the elliptical cross-section is particu-
It is known to connect, within a multi-cell storage battery, the positive and negative electrodes of each cell by means of their take-off vanes electrically and mechanically with a respective pole bridge. On its upper end the pole bridge has a current conductive projection, the pole piece.
The pole pieces of adjoining cells are connected to each other by means of a cell connector. To prevent unnecessary current losses it is desired to utilize cell connectors having the shortest possible current path~ or sufficiently great conductive cross-section.
In batteries of previously known construction the cell connectors are positioned above the battery lid so that the pole blidges of adjoining cells can be connected to the cell connectors only by means of relatively long projections -- the pole pieces ~ traversing the battery lid. The long current path which this produces and the inconYenience of making the various solder joints have led to many attempts to connect the pole bridges of ad-joining cells to each other in a more rational manner. Some solutions contemplated punching holes in the cell separating partitions at the level of the pole bridges, lowering the preassembled plate blocks into the cells, and welding together, through the opening in the cell separating partition, projections attached to the pole pieces.
In place of this welding technique it is particularly desirable to provide recesses in the cell separating partitions into which the cell connector which ties together two adjoining plate blocks is introduced from above. As described in German patent 1,804,800, this cell connector is then surrounded with molded plastic material, so that the recess in the cell partition is again filled in tightly. This technique is used particularly in the manufacture of starter batteries in large quantities.
11~33~7 It is an object of this invention to provide a cell connector construction which is particularly suitable for larger batteries.
According to the present invention there is provided a cell connec-tor for lead storage batteries which passes through the cell separating partition and is sealed therein through molding around with plasti~wherein the cell connector includes a yoke passing ~hrough the cell separating partition, the yoke being connected to pole bridges on both sides of the cell separating partition through pole pieces extending parallel to said partition and downwardly, and the pole pieces being provided with at least one encir-cling recess or protrusion.
In the accompanying drawings which illustrate an exemplaryembodiment of the present invention:
FIGURE l shows a view in perspective of an embodiment of the present invention;
FIGURE 2 shows a cross-section of the connector, and FIGURE 3 shows a top view.
In all of these figure~ there is shown a yoke l with legs connecting the adjacent pole pieces 2. From the lower end of these, the respective pole bridges or transition pieces 3 angle away. Each of the two pole pieces 2 is provided with a series of encircling grooves or recesses 4 which extend perpendicularly to the axis of the pole pieces. Between the recesses are encircling protrusions. By providing a plurality of alternating recesses and protrusions, the p~le pieces are given, as is particularly visible in Figure l, a ribbed configuration with a large surface area. Similarly the upper edge of yoke 1 may be provided with a plurality of recesses or protru-sions 41. In addition, yoke l has in its middle a vertical through passage 5.
The rectangular cross~section of the pole pieces such as illustrated in ~igure l may be replaced by an elliptical configuration. For streSs-free shrir~ ng-on of the plastic material the elliptical cross-section is particu-
-2-~1~33~7 larly desirable.
In accordance with Figure 1 the cell connector is positionedstraddling a recess 6 within cell separating partition 7. The width and depth of recess 6 are so dimensioned that there are along the sides of yoke 1 still about two millimeters of play, and that the unaffected rim of the cell separating partition 7 extends above the upper edge of the yoke by a few millimeters. In this manner the cell connector is in lightly sliding contact with the cell separating partition 7 only along guidance shoes 8, which are formed upon the inner surfaces of pole pieces 2. The guidance shoes 8 face each other with a separation just sufficient to permit the passage therebetween of the cell separating partition 7. On the one hand they serve to assist in correctly positioning the cell connector with its yoke 1 within recess 6 of the cell separating partition 7. On the other hand, they serve as seals for the space 9 enclosed by yoke 1 and pole pieces 2, and which is completely filled with plastic material upon molding around the cell connector. In so doing, the passage 5 plays the role of a vent. Figure 2 best shows the finished state of the cell connector embodying the invention after it has been sealed on all sides with plastic material 10. For sealing there is required only a simple injection molding form which may, for example~ envelop the cell connector with two ~arities, and which may be pressed against the outside of pole pieces 2 and cell separating partition 7 only at the level of guidance shoes 8. By virtue of the acute-angled sloping surfaces 11 of guidance shoes 8 towara the faces of pole pieces 2 it becomes possible to readily disassemble the tool from the cell connector following molding. Also the plastic seal has imparted to it an encircling lower limit at ~he level of the guidance shoes 8, whereas all of the hollow spaces existing above the level of the guidance shoe~ 8 are filled with the plastic material 10. This material is preferably identical to that of which the cell separating partition 7 is made.
By means of the plastic envelope of the cell connector the recess llU33~7 6 is also sealed above the yoke 1 up to the full height of the cell separating partition 7, so that the same can then be connected with the upper portion previously formed within the battery lid, for example, by means of mirror welding.
Figure 3 shows in a top view the completed cell connector with its envelope of plastic 10.
In addition to the desirable intimate interlocking between the plastic and the metal of the cell connector by virtue of the encircling grooves as well as by the corresponding grooves in the region of the yoke, there is provided above all a greatly extended phase boundary surface. For the electrolyte this creates a very substantially extended creepage path, which impedes its passage through the cell separating partition into a neighboring cell.
Thus the cell connector embodying the invention achieves the objective which is particularly important for large cells, which is to prevent the creation of electrolytic internal short-circuits. Through such prevention it simultaneously contributes to enhancing the effectiveness of current acceptance and delivery, to prevent water losse~ and to extend the intervals between service.
In accordance with Figure 1 the cell connector is positionedstraddling a recess 6 within cell separating partition 7. The width and depth of recess 6 are so dimensioned that there are along the sides of yoke 1 still about two millimeters of play, and that the unaffected rim of the cell separating partition 7 extends above the upper edge of the yoke by a few millimeters. In this manner the cell connector is in lightly sliding contact with the cell separating partition 7 only along guidance shoes 8, which are formed upon the inner surfaces of pole pieces 2. The guidance shoes 8 face each other with a separation just sufficient to permit the passage therebetween of the cell separating partition 7. On the one hand they serve to assist in correctly positioning the cell connector with its yoke 1 within recess 6 of the cell separating partition 7. On the other hand, they serve as seals for the space 9 enclosed by yoke 1 and pole pieces 2, and which is completely filled with plastic material upon molding around the cell connector. In so doing, the passage 5 plays the role of a vent. Figure 2 best shows the finished state of the cell connector embodying the invention after it has been sealed on all sides with plastic material 10. For sealing there is required only a simple injection molding form which may, for example~ envelop the cell connector with two ~arities, and which may be pressed against the outside of pole pieces 2 and cell separating partition 7 only at the level of guidance shoes 8. By virtue of the acute-angled sloping surfaces 11 of guidance shoes 8 towara the faces of pole pieces 2 it becomes possible to readily disassemble the tool from the cell connector following molding. Also the plastic seal has imparted to it an encircling lower limit at ~he level of the guidance shoes 8, whereas all of the hollow spaces existing above the level of the guidance shoe~ 8 are filled with the plastic material 10. This material is preferably identical to that of which the cell separating partition 7 is made.
By means of the plastic envelope of the cell connector the recess llU33~7 6 is also sealed above the yoke 1 up to the full height of the cell separating partition 7, so that the same can then be connected with the upper portion previously formed within the battery lid, for example, by means of mirror welding.
Figure 3 shows in a top view the completed cell connector with its envelope of plastic 10.
In addition to the desirable intimate interlocking between the plastic and the metal of the cell connector by virtue of the encircling grooves as well as by the corresponding grooves in the region of the yoke, there is provided above all a greatly extended phase boundary surface. For the electrolyte this creates a very substantially extended creepage path, which impedes its passage through the cell separating partition into a neighboring cell.
Thus the cell connector embodying the invention achieves the objective which is particularly important for large cells, which is to prevent the creation of electrolytic internal short-circuits. Through such prevention it simultaneously contributes to enhancing the effectiveness of current acceptance and delivery, to prevent water losse~ and to extend the intervals between service.
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A cell connector for lead storage batteries which passes through the cell separating partition and is sealed therein through molding around with plastic, wherein the cell connector includes a yoke passing through the cell separating partition, the yoke being connected to pole bridges on both sides of the cell separating partition through pole pieces extending parallel to said partition and downwardly, and the pole pieces being provided with at least one encircling recess or protrusion.
2. The cell connector of claim 1 wherein the cross-section of the pole pieces is substantially rectangular.
3. The cell connector of claim 1 wherein the cross-section of the pole pieces is substantially elliptical.
4. The cell connector according to any of claims 1, 2 and 3 wherein the yoke has a passage therethrough.
5. The cell connector of claim 1 wherein the pole pieces are provided with protrusions facing each other near their bottom, the protrusions defining between them a space for guidance therein of the cell separating partition.
6. A storage battery having a plurality of adjacent cells connected by means of a cell connector as defined in claim 1.
7. The storage battery of claim 6 wherein the cell separating partition has a recess for receiving the yoke, the recess being sufficiently deep so that the unrecessed portion of the partition extends above the top of the yoke.
8. The cell connector of claim 1 wherein each leg of the yoke has a plurality of alternating encircling recesses and protrusions.
9. The connector of claim 8 wherein the top connecting portion of the yoke also has a plurality of alternating recesses and protrusions.
10. The battery of claim 7 wherein the spaces surrounding the yoke positioned within the recess are tightly filled with plastic material.
11. The battery of claim 10 wherein the plastic material is applied through injection molding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772741934 DE2741934A1 (en) | 1977-09-17 | 1977-09-17 | CELL CONNECTOR FOR LEAD ACCUMULATORS |
| DEP2741934.7 | 1977-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1103307A true CA1103307A (en) | 1981-06-16 |
Family
ID=6019215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA308,813A Expired CA1103307A (en) | 1977-09-17 | 1978-08-04 | Inter-cell connector for storage batteries |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1103307A (en) |
| DE (1) | DE2741934A1 (en) |
| GB (1) | GB2004410B (en) |
| SE (1) | SE7808393L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4675991A (en) * | 1985-11-25 | 1987-06-30 | General Motors Corporation | Method of assembling electric storage batteries |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100637443B1 (en) * | 2005-07-05 | 2006-10-20 | 삼성에스디아이 주식회사 | Secondary battery and terminal assembly using the same |
| CN107452936B (en) * | 2017-09-04 | 2023-06-20 | 旭派电源有限公司 | Bridge structure of lead-acid storage battery |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB586072A (en) * | 1944-10-18 | 1947-03-06 | Pritchett & Gold & E P S Co | Improvements in or relating to electric storage batteries |
| DE1804800A1 (en) * | 1968-01-24 | 1970-08-06 | Varta Ag | Process for the production of an accumulator with cell connections guided through the cell dividing walls |
| FR1562950A (en) * | 1968-01-25 | 1969-04-11 | ||
| US3692587A (en) * | 1970-08-13 | 1972-09-19 | Globe Union Inc | Multicell storage battery |
-
1977
- 1977-09-17 DE DE19772741934 patent/DE2741934A1/en not_active Ceased
-
1978
- 1978-08-04 CA CA308,813A patent/CA1103307A/en not_active Expired
- 1978-08-04 SE SE7808393A patent/SE7808393L/en unknown
- 1978-09-18 GB GB7837145A patent/GB2004410B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4675991A (en) * | 1985-11-25 | 1987-06-30 | General Motors Corporation | Method of assembling electric storage batteries |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2741934A1 (en) | 1979-03-29 |
| GB2004410B (en) | 1982-01-13 |
| SE7808393L (en) | 1979-03-18 |
| GB2004410A (en) | 1979-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |