GB2138623A - Preservation Device for a Lead Storage Battery - Google Patents
Preservation Device for a Lead Storage Battery Download PDFInfo
- Publication number
- GB2138623A GB2138623A GB08406281A GB8406281A GB2138623A GB 2138623 A GB2138623 A GB 2138623A GB 08406281 A GB08406281 A GB 08406281A GB 8406281 A GB8406281 A GB 8406281A GB 2138623 A GB2138623 A GB 2138623A
- Authority
- GB
- United Kingdom
- Prior art keywords
- storage battery
- lead storage
- preservation device
- impedance means
- base member
- 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.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention discloses a preservation device for a lead storage battery 25 of the kind which includes at least one negative plate 4, at least one positive plate 5, at least one separator 6 between said negative and positive plates 4, 5, an electrolyte holdingly impregnated by said negative and positive plates 4, 5 and separator 6 and limited in amount such that substantially there is no electrolyte liberated from said negative and positive plates 4, 5 and said separator 6, and external terminals 9, 10 being connected to said negative and positive plates 4, 5 and an impedance means 31 connected between said external terminals. Such preservation device permits to prevent a battery preserved in such device from being decreased in capacity without requiring troublesome maintenance such as supplementary charging at regular intervals, even if it is preserved for a long period of time. <IMAGE>
Description
SPECIFICATION
Preservation Device for a Lead Storage Battery
The present invention relates to a preservation device for a lead storage battery, and more particularly, a preservation device for a so-called retainer-type lead storage battery having.an electrolyte limited in amount such that substantially there is no liberated electrolyte.
In a retainer-type lead storage battery, the electrolyte is limited in amount and the negative electrode has capacity larger by 10~30% than that of the positive electrode. Accordingly, when the battery is charged, the positive electrode is fully charged prior to the negative electrode.
Oxygen generated from the positive electrode due to overcharge is absorbed and consumed by the negative electrode.
After being assembled, lead storage batteries of this type are generally subjected to forming and then delivered or preserved in a full-charge state.
Until they are put to actual use, it is required that they are supplementarily charged at regular intervals, for example every six months and preferably every three months, in order to preserve such batteries at all times substantially in a full-charge state.
Lead storage batteries generally undergo selfdischarge of about 0.1--0.15% of the battery capacity each day, thereby reducing their capacity due to self-discharge by 20~30% over a period of six months.
If a discharge product produced by selfdischarge of a battery can be activated by charging or if the battery capacity can be restored, it is not required to supplementarily charge the battery so often. However, when a battery is left in a self-discharge state for a long period of time, a discharge product or lead sulfate (PbSO4) is inactivated, thereby reducing the charging efficiency. Accordingly, the capacity cannot be sufficiently restored and causes a decrease in battery characteristic, thus requiring frequent maintenance of supplementary charge. Such maintenance is not only troublesome, but also includes the problem that the battery capacity cannot be fully restored even with a repeated supplementary charge.
Figure 1 of the accompanying drawings is a graph of self-discharge characteristics showing the capacity rates to an initial battery capacity of the battery capacity where the batteries were discharged at room temperature (200C) after leaving for various periods of time under such discharging condition that they were discharged with a current corresponding to 0.1 c and stopped discharging when the voltage of the battery
reached 1.7 V.
Figure 2 of the accompanying drawings is a graph of the capacity reset characteristics showing the capacity reset rates to an initial battery capacity of the battery capacity where the batteries were charged with a constant voltage
(2.5 V) for 16 hours and then discharged with the
above discharge condition, after leaving for various periods of time.
In Figure 1. and Figure 2, the initial capacity of the battery which was discharged immediately after forming under the above discharge condition, is defined as 100%.
According to the studies of the inventors and others, batteries are slowly decreased in voltage by self-discharge when they are left after subjected to forming. With such self-discharge, there are chemically bonded Pb++ ions in the corrosion layer of lead dioxide (PbO2) on the surface of the collector member or Pb++.ions of the active material PbO2 with SO4-- ions in the H2 SO4 electrolyte, thereby to produce lead sulfate (PbS04). When batteries are left for a long period of time, such lead sulphate (PbSO4) easily becomes inactivated. This decreases the charging efficiency when batteries are re-charged, so that the capacity cannot be fully restored and deteriorates the battery characteristics.Such deterioration becomes greater as the supplementary charging cycle period is longer or batteries are left for a longer period of time. Such deterioration is further accelerated when batteries are left in a high temperature atmosphere.
According to the present invention there is provided a preservation device for a preserving during storage a lead storage battery of the kind which includes at least one negative plate, at least one positive plate, at least one separator between said negative and positive plates, and electrolyte holdingly impregnated by said negative and positive plates and said separator and limited in amount such that substantially there is no electrolyte liberated from said negative and positive plates and said separator, and external terminals having one end respectively connected to said negative and positive plates and the other ends exposed to the outside of the battery casing; the preserving device comprising an impedance means connected between the external terminals of said lead storage battery during its storage time.
Some embodiments of the present invention will now be described, by way of examples, with reference to the accompanying drawings, in which:
Figure 1 is a graph showing the self-discharge characteristics of lead storage batteries;
Figure 2 is a graph showing the capacity reset characteristics of lead storage batteries left for various periods of time;
Figure 3 is a section view of one example of a lead storage battery applied to a preservation device in accordance with the present invention;
Figure 4 is a graph for comparing in performance a lead storage battery A preserved by the preservation device of the present invention with other lead storage batteries B, C and D for comparison purpose;
Figure 5 is an exploded perspective view of other example of a lead storage battery applied to a preservation device in accordance with the present invention;;
Figure 6 is a perspective view of a first embodiment of a preservation device in accordance with the present invention;
Figure 7 is a sectional view of Figure 6 taken along the line S-S indicated in Figure 6;
Figure 8 is a front view of the base member shown in Figure 6;
Figure 9 is a back view of other example of a base member used in the preservation device of the present invention;
Figure 10 is a front view of a second embodiment of a preservation device of the present invention;
Figure 11 is a sectional view of Figure 10 taken along the line T-T indicated in Figure 10;
Figure 12 is a back view of Figure 10;
Figure 13 is a third embodiment of a preservation device of the present invention;
Figure 14 is a front view of the base member shown in Figure 13;;
Figure 15 is a front view of the base member shown in Figure 14 with cut-up pieces not raised up;
Figure 16 is a sectional view of Figure 15 taken along the line U-U indicated in Figure 15;
Figure 17 is a sectional view of Figure 15 taken along the line V-V indicated in Figure 15;
Figure 18 is a front view of a fourth embodiment of a preservation device of the present invention;
Figure 19 is a sectional view in side elevation of Figure 18;
Figure 20 is a perspective view of a base plate in Figure 18;
Figure 21 is a front view of a fifth embodiment of a preservation device in accordance with the present invention;
Figure 22 is a sectional view of Figure 21 taken along the line W-W indicated in Figure 21;
Figure 23 is a perspective view of the housing case shown in Figure 21;;
Figure 24 is a sectional view in side elevation of a sixth embodiment of a preservation device in accordance with the present invention;
Figure 25 is a perspective view of the housing case shown in Figure 24;
Figure 26 is a front view of a seventh embodiment of a preservation device in accordance with the present invention;
Figure 27 is a sectional view of the device shown in Figure 26;
Figure 28 is a partial section view in front elevation of a lead storage battery shown in
Figure 26 with a cap mounted thereon;
Figure 29 is a plan view of Figure 28;
Figure 30 is a sectional view in front elevation of the cap in Figure 26;
Figure 31 is a bottom view of Figure 30;
Figure 32 is a partial section view in front elevation of an eighth embodiment of a preservation device in accordance with the present invention;;
Figure 33 is a sectional view of Figure 32 taken
along the line X-X indicated in Figure 32;
Figure 34 is a partial section view in front
elevation of the lead storage battery shown in
Figure 32; and
Figure 35 is a plan view of the lead storage battery shown in Figure 34.
The description hereinafter will be made of one example of a lead storage battery applied to the present invention, with reference to Figure 3 showing the section view thereof.
A lead storage battery 1 is made in the following way.
A lead-calcium alloy is subjected to casting, punching or expanding, and cut into a piece of 50x50x 1 mm as a negative collector member 2 and a piece of 50x50x2 mm as a positive collector member 3. An active material paste of lead monoxide (PbO) and water, is rolled by a roller, so that active material layers of 50x50x0.7 mm and 50x50x1.0 mm are formed. These sheet-like active material layers are respectively contact-pressed to the negative collector member 2 and the positive'collector member 3 at the both sides thereof, thereby to form a negative plate 4 and a positive plate 5. The final negative plate 4 has a thickness of 1.2 > mm, while the final positive plate 5 has a thickness of 2.4 mm.
An electrode assembly is formed by placing alternately one positive plate 5 and two negative plates 4 made as discussed above, with glass fibre separators 6 disposed between the positive plate 5 and the negative plates 4. This electrode assembly is disposed in a battery case 7 formed of a resin.
An amount of 10 cc of sulphuric acid electrolyte having a specific gravity of 1.30 is poured into the case 7. After the electrolyte has been holdingly impregnated by the negative plates 4, the positive plate 5 and the separators 6, a battery casing lid 8 having a negative external terminal 9 and a positive external terminal 10 is mounted-to the battery case 7, thus forming a lead storage battery having a capacity of 1 AH.
Such lead storage battery may be used after subjected to forming. The vessel consists of said case 7 and lid 8.
The present invention provides a preservation device for preserving such a lead storage battery, the device having an impedance means, formed by a resistance for example, connected between the external terminals 9 and 10 of the battery 1.
This impedance means is preferably set to such a value that a lead storage battery provided with the preservation device discharges with a current smaller than that corresponding to the 5-hour rate (0.2 c). In the embodiment, there is connected a resistance of 20 ohms corresponding to the 0.1 c current of the lead storage battery 1.
Comparison is then made in performance between the lead storage battery A preserved by a preservation device according to this embodiment, and comparative lead storage batteries B, C and D stored with their external terminals opened for the comparison purpose.
The comparative lead storage battery B discharged with a constant current corresponding
to 0.1 c until the discharge stop voltage (1.7 V) was reached. The battery B was stored with the external terminals opened. In the battery B, the self-discharge rate is substantially 100%.
The comparative lead storage battery C discharged by 0.5 AH with a constant current corresponding to 0.1 c and then stored with the external terminals opened. In the battery C, the self-discharge rate is substantially 50%.
The comparative lead storage battery D was stored with the external terminals opened immediately after subjected to forming.
Tests and measuring were conducted under simulation of various self-discharge rates of the lead storage batteries A, B, C and D stored for a long period of time. Namely, after subjected to forming as charged for 24 hours with a current density corresponding to 1.5 A/dm2, the lead storage batteries A, B, C and D were left for 3 months and 6 months in an atmosphere of 400C for the purpose of accelerated tests. The batteries
A, B, C and D were then charged with a constant voltage of 2.5 V for 16 hours and discharged with a current corresponding to 0.1 c. Measurement was made on discharge capacity where the discharge stop voltage of 1.7 V was reached.
Figure 4 is a graph showing the test results as to performances of a lead storage battery A connected to a preservation device of the present invention, and the comparative lead storage batteries B, C, and D. From Figure 4, it is seen that the lead storage battery A connected to a preservation device of the present invention satisfies the rated capacity even after being stored for 6 months. From Figure 4, it is also seen that the comparative lead storage batteries B, C and D are decreased in charging efficiency, in particular where such batteries were charged with a constant voltage after storage for a long period of time.Such decrease in charging efficiency is caused by the fact that, when a battery is stored for a long period of time with the terminals opened, the corrosion layer of PbO2 produced on the positive collector surface by forming is transformed into Pb++ ions, and such Pb++ ions are reacted to and bonded with SO4-- ions remaining in the electrolyte, thereby to produce an inactive PbSO4 layer. Such reaction provokes voltage build-up at the time of charging made after the battery has been stored. This results in defective charge.
On the other hand, when a battery is left and stored in the preservation device of the present invention with the impedance means of the device connected between the both external terminals of the battery, a discharge current flows correspondingly to the discharge voltage produced due to load connection. Accordingly, a micro-current discharge is made at the final discharge stage. With discharge from the active material more advanced, the battery stops discharging uniformly around the plate surfaces, and the SO4-- ions remaining in the electrolyte are substantially consumed. This restrains generation of PbSO4 by SO4-- and Pb++ in the
PbO2 corrosion layer of the collector member.
Therefore, after being left and stored in the preservation device of the present invention even for a long period of time, the battery does not exhibit the problem that-a charging current flow is decreased due to transformation of the PbO2 corrosion layer to PbSO4 during such storage.
Accordingly, a battery stored in the preservation device of the present invention even for a long period of time, may be efficiently charged, in particular with a constant voltage, thereby to prevent the battery from being decreased in characteristic.
A description will now be made of a first embodiment of the present invention with reference to Figures 5 to 8.
The description firstly discusses one example of a lead storage battery applied to this first embodiment, with reference to Figure 5 showing the exploded perspective view of such a battery.
Plate-shaped collector members 13 are respectively secured to the inner surfaces of a resin member 11 comprising a part of a battery casing, and a battery casing lid 12 is engaged with the opening of the resin member 11.
Each of the resin member 11 and the battery casing lid 12 is formed integrally with the plateshape collector member 13 of a Pb-Ca alloy, an external terminal 14 and a lead wire 15 for connecting the external terminal 14 to the collector member 13, according to insertmoulding with the use of an ABS resin. The external terminals 14 of negative and positive plates are located on the same plane. The resin member 11 has a valve chamber 16 in which a safety valve is disposed, a rectangular shaped engagement groove 18 to engage with a rectangular shaped projection wall 17 provided on the inner surface of the battery casing lid 12, and a gas hole 19 for discharging gas.
Housed in the resin member 11 is an electrode assembly including a negative active material layer 21 held by a resin material 20, a separator 22 and a positive active material layer 24 held by a resin material 23. At this time, the plate-shaped collector member 13 comes in contact with one side of the negative active material layer 21 or the positive active material layer 24.
A necessary amount of a sulphuric acid electrolyte having specific gravity of 1.30 is poured onto the electrode assembly. Since the area of the electrode assembly to receive the electrolyte is relatively large, the inside air or a generated gas is easily substituted so that the electrolyte is holdingly impregnated immediately by the electrode assembly.
The resin member 11 and the battery casing
12 are then secured to each other and hermetically sealed. The battery may then be used after subjected to forming.
A description will now be made of a first embodiment of a preservation device for preserving such lead storage battery 25 of the thin plate shape of the present invention, with reference to Figures 6 to 8.
A housing member 26 for housing the head storage battery 25 includes a base member 27 made of a thick paper or resin for example hard vinyl chloride or ABS, and a transparent covering member 29 which has a peripheral edge attached to the base member 7 and, at the centre thereof, an expanded portion 28 of which the shape corresponds to the shape of the lead storage battery 25 to be housed. Thus, the lead storage battery 25 is housed and held by and between the expanded portion 28 and the base member 27.
The base member 27 has, at the positions thereof corresponding to the both external terminals 14 of the lead storage battery 25, contact members 30 secured thereto and arranged to respectively come into contact with both external terminals 14. Connected between both contact members 30 is an impedance means comprising an impedance element 31 such as a resistance. This impedance element 31 is formed by, for example, a printed resistance, and secured to the base member 27. For example, a printed resistance or the like is secured to the base member 27 by being printed thereon. As shown in
Figure 9, a resistance 32 or the like may also be secured to the reverse side of the base member 27.
The base member 27 has a perforation 33 or the like to facilitate the removal of the lead storage battery 25 from the housing member 26.
When the lead storage battery 25 after subjected to forming, is housed in the housing member 26, it means that the impedance element 31 (32) such as a resistance is connected, through both contact members 30,.between the external terminals 14 of the lead storage battery 25.
After being stored and preserved in such state, the lead storage battery 25 may be removed from the housing member 26 and charged when it is actually used. Thus, such lead storage battery may be used with its original characteristics not deteriorated without requiring any maintenance such as supplementary charging.
A description will now be made of a second embodiment of the present invention with reference to Figures 10 to 12.
Like the first embodiment in Figure 6, a housing member 34 is provided for housing the lead storage battery 25 shown in Figure 5, and includes a base member 35 and a covering member 37 having a peripheral edge attached to the base member 35 and, at the centre thereof, an expanded portion 36 of which the shape corresponds to the shape of the lead storage battery 25. The lead storage battery 25 is housed
in the housing member 34 and held by and between the expanded portion 36 and the base
member 35.
The base member 35 has a projection wall 38 for positioning the lead storage battery 25.
According to press machining, this projection wall 38 is formed into a frame or rectangular shape so as to surround the lead storage battery 25. The base member 35 has on the reverse side thereof a concave portion 39.
The base member 35 has, at the positions thereof corresponding to both external terminals
14 of the lead storage battery 25, contact members 40 secured thereto which respectively come into contact with the external terminals 14.
An impedance element 41 similar to that in Figure 6, is connected between these contact members 40. This impedance element 41 is formed by a printed resistance or the like and secured to the base member 35. For example, a printed resistance or the like may be secured to the surface of the base member 35 by being printed thereon, or a resistance may be secured to the reverse side of the base member 35. In this second embodiment, the impedance element 41 is disposed in a hollow portion 42 of the projection wall 38. Such arrangement enables the projection wall 38 to also serve as a projection wall of the impedance element 41.
The base member 35 has a perforation 43 or the like to facilitate the removal of the lead storage battery 25 from the housing member 34.
Although the projection wall 38 is made hollow in the second embodiment, the projection wall 38 is not limited to the hollow construction but may be formed into any shape as far as it can position the lead storage battery 25.
According to the second embodiment, the impedance element 41 can be securely connected automatically between both external :terminals 14 of the lead storage battery 25 when the lead storage battery 25 is housed and preserved in the housing member 34 as positioned by the projection wall 38 of the base member 35.
According to the second embodiment, the positioning projection wall 38 may also serve as a protective wall of the impedance element 41 since the impedance element 41 is disposed in the hollow portion 42 of the projection wall 38.
The description will now discuss a third embodiment of the present invention with reference to Figures 13 to 17.
A base member 45 of a housing member 44 for housing the lead storage battery in Figure 5 is made of a thin plate of an opaque resin such as vinyl chloride or an ABS resin. The base member 45 has, on its four sides, cut-up pieces 46, 47a, 47b and 47c located outside of the positions corresponding to the external shape of the lead storage battery 25 when placed on the base member 45. The cut-up piece 46 has a pair of terminal receiving members 49 between which a chip resistance 48 constituting an impedance means is disposed. These terminal receiving members 49 and the chip resistance 48 are attached to the surface of the cut-up piece 46 and connected to each other by a printed pattern 50 including contact members.
Figure 15 shows the base member 45 with the cut-up pieces 46, 47a, 47b and 47c not raised up.
As shown in Figure 1 5, the cut-up pieces 47a, 47b and 47c respectively have slits Sla, 51b and 51 c at the longitudinal centres thereof. These cutup pieces 46, 47a, 47b and 47c are raised up toward the surface of the base member 45 as shown in Figure 14. At this time, the chip resistance 48 and the terminal receiving members 49 are inwardly turned. After being raised up, the cut-up pieces 47a, 47b and 47c are inwardly turned by the respective slits Sia, 51b and 51 c, thereby to form three pairs of resilient pieces 52a, 52b and 52c.
The lead storage battery 25 is then housed in the space defined by the cut-up pieces 46, 47a, 47b and 47c. At this time, the chip resistance 48 is electrically connected to the external terminals 14 of the lead storage battery 25 through the printed circuit pattern 50. The resilient pieces 52a, 52b and 52c are effective in securely fixing the lead storage battery 25.
The lead storage battery 25 thus fixed to the base member 45 with the chip resistance 48 connected between the external terminals 14, is covered with a covering member 53 and hermetically sealed. The covering member 53 is made by vacuum-moulding of a transparent styrol resin, and is attached to the base member 45 by adhesives or pressingly adhered thereto by heating.
According to the third embodiment, the impedance means is not embedded in resin according to insert-moulding or the like. Thus, the impedance means is neither subjected to heat generated during moulding nor subjected to an excessive pressure due to contraction after moulding, thereby to improve the reliability of the impedance means.
The cut-up pieces 46,47a,47b and 47s or the resilient pieces 52a, 52b and 52c may push the lead storage battery 25 in the inner direction of the housing member 44. Such construction prevents the lead storage battery 25 from positionally shifting in transit. It is therefore possible to maintain the impedance-connection of the lead storage battery 25 in the optimum condition.
A description will now be made of a fourth embodiment of the present invention with reference to Figures 18 to 20.
A board 54 is disposed to face to the external terminals 14 of the lead storage battery 25 and has contact members 55 printed thereon at the positions thereof corresponding to the external terminals 14. Disposed between these contact members 55 is an adhesive tape resistance 56 constituting an impedance means. This adhesive tape resistance 56 is electrically connected to the contact members 55 through connection members 57 printed on the board 54. After the circuit has been printed on the board 54 by etching or the like, the adhesive tape resistance 56 is attached to the board 54, which is then subjected to heating in a pyrostat of 3000C for 5 to 6 hours, so that the adhesive tape resistance 56 is fixed to the board 54.
After subjected to forming, the lead storage battery 25 is housed in a housing member 58 with the board 54 directed to that surface of the lead storage battery 25 on which the external terminals 14 are disposed. The housing member 58 includes a plate-shape base member 59 made of a transparent resin, for example vinyl chloride or an ABS resin, and a covering member 60 made by vacuum-moulding of a transparent styrol resin.
The covering member 60 is attached to the base member 59 by adhesive or pressingly secured thereto by heating. Such sealed lead storage battery is delivered from the factory and preserved at retail shops or the like.
After the adhesive tape resistance 56 has been attached to the base member 59, the portion of the board 54 including the resistance 56 and the contact members 55 may be broken away and raised upward from the base member 59 so as to face to the lead storage battery 25.
According to the fourth embodiment of the present invention, the contact members 55 and the adhesive tape resistance 56 are disposed on the inner surface of the covering member 60, so that it is not required to embed the impedance means into the base member according to insertmoulding or the like. Thus, the impedance means is neither subjected to heat generated during moulding nor to an excessive pressure due to contraction after moulding, thereby to improve its reliability.
The board 54 having the impedance means may be formed as an independent member. In such case, when a lead storage battery is to be preserved as removed from the housing member 58, the adhesive tape resistance 56 may be attached to that portion of the lead storage battery on which the external terminals 14 are disposed. Thus, impedance-connection may be easily provided.
A description will now be made of a fifth embodiment of the present invention with reference to Figures 21 to 23.
According to this fifth embodiment, a lead storage battery 61 to be housed, has external terminals 62 projected from the battery vessel.
The lead storage battery 61 is housed in a housing case 63 of which the top is opened. The housing case 63 has a concave portion 64 for housing the lead storage battery 61, and two grooves 65 at the top of the case 63. Disposed in the grooves 65 are terminal receiving members 66 to come into contact with the external terminals 62. The terminal receiving members 66 have resiliency to facilitate the insertion of the external terminals 62 therein.
The housing case 63 has therein an impedance means 67 connected to the terminal receiving members 66. The housing case 63 has, at the rear end thereof, a resilient piece 68 which applies a spring-load to the lead storage battery in the direction toward the terminal receiving members 66. The housing case 63 is made of a resin such as ABS or polypropylene and formed integrally with the terminal receiving members 66 and resistance as the impedance means 67 according to insert-moulding.
According to this fifth embodiment, with the external terminals 62 of the lead storage battery 61 inserted into the terminal receiving members 66, the lead storage battery 61 is housed in the concave portion 64. The impedance means 67 is thus connected between the external terminals 62 through the terminal receiving members 66.
A description will now be made of a sixth embodiment with reference to Figures 24 to 25.
According to the sixth embodiment, there is housed the lead storage battery 25 of the thin plate type shown in Figure 5.
The lead storage battery 25 is housed in a housing case 69 of which the top is opened. The housing case 69 has a concave portion 70.
Disposed on the bottom plate 71 of the concave portion 70 are terminal receiving members 72 respectively arranged to come into contact with the external terminals 14 of the lead storage battery 25. The terminal receiving members 72 are made of leaf springs to apply an upward spring-load. When inserted in the housing case 69, the lead storage battery 25 is held by and between a top plate 73 and the terminal receiving members 72 of the housing case 69 at itsifront end. Resistance 74 as an impedance means is connected between the terminal receiving members 72.
The housing case 69 has at its rear end a curved surface 75 for smoothly guiding the lead storage battery 25 when it is inserted. The curved surface 75 has at its terminal end of a step portion 76 to which a leaf spring 77 disposed in the housing case 69 at its front end, pushes the housed lead storage battery 25.
Likewise the fifth embodiment shown in Figure 21, the housing case 69 is made of resin such as
ABS and formed integrally with the terminal receiving members 72, the resistance 74 and the leaf spring 77 according to insert-moulding.
When the lead storage battery 25 is housed in the housing case 69, the resistance 74 as the impedance means is connected between the external terminals 14 through the terminal receiving members 72.
The housing case 69 according to the sixth embodiment of the present invention, enables the lead storage battery 25 to be easily housed and removed, and may be used any number of times for preserving the lead storage battery 25.
A description will now be made of a seventh embodiment of the present invention with reference to Figures 26 to 31.
A cap 78 as a mounting member is mounted to the lead storage battery 25 shown in Figure 5 for covering a portion thereof. The cap 78 made of a synthetic resin, has in the top surface thereof, a concave portion 79, in which a solid resistance 80 equivalent to 0.1 c is disposed as an impedance means. The cap 78 has, in the lower portion thereof, a concave portion 81 into which the lead storage battery 25 is inserted at the upper end thereof. The concave portion 81 has a pair of contact members 82 on the upper surface thereof at its positions corresponding to the external terminals 14 of the lead storage battery 25. These contact members 82 are connected to the solid
resistance 80 through connection members 83 of
lead wires.When the cap 78 is mounted on the
lead storage battery 25 at its upper end, the contact members 82 come into contact with the
external terminals 14.
With the cap 78 mounted on the lead storage
battery 25 after subjected to forming, the lead storage battery 25 is housed in a housing
member 84. The housing member 84 includes a
plate-shaped base member 85 made of a transparent resin such as vinyl chloride or ABS, and a covering member 86 made by vacuum
moulding of a transparent styrol resin.
With the cap 78 mounted on the lead storage battery 25 after subjected to forming and the solid resistance 80 as an impedance means connected between the external terminals 14, the
lead storage battery 25 is disposed on the base
member 85. The covering member 86 is attached to the base member 85 by adhesive or pressingly secured thereto by heating. The lead storage battery 25 is then preserved.
According to this seventh embodiment, the
impedance means is housed in the concave
portion 79 of the cap 78, and is not embedded in
a resin member according to insert-moulding, etc.
Thus, the impedance means is neither subjected to heat generated during moulding nor to an
excessive pressure due to contraction after
moulding, so that the reliability of the impedance
means is greatly improved.
Moreover, the preservation device according to this seventh embodiment enables the cap 78
including the impedance means to be easily attached to and removed from the lead storage battery 25 after it has been taken out from the
housing member 84. This advantageously permits the lead storage battery 25 to be again left and
preserved for a long period of time.
A description will now be made of an eighth
embodiment of the present invention with
reference to Figures 32 to 35.
A chip resistance 88 as an impedance means is
directly secured to a lead storage battery 87
similar to the lead storage battery 25 in Figure 5.
The chip resistance 88 has one end connected to
one external terminal 89 of the lead storage
battery 87 and the other end which is exposed to form an exposed portion 90.
On delivery from the factory, the lead storage
battery 87 is housed in a covering member 91 of the housing case type to be separable into two
portions. The covering member 91 has at the
upper inner surface thereof a printed connection
member 92 of an electroconductive pattern film.
When the lead storage battery 87 is covered with
the covering member 91, this connection member
92 electrically connects the other end of the chip
resistance 88 to the other external terminal 93 of
the lead storage battery 87.
The lead storage battery 87 manufactured at
factory is, after fully charged, covered with the
covering member 91 to provide impedance
connection between the external terminals 89 and 93, through the chip resistance 88 and the connection member 92.
For the use, the removal of the covering member 91 from the lead storage battery 87 shuts off the electrical connection between the chip resistance 88 and the external terminals 89 and 93, permitting the lead storage battery 87 to be immediately used.
Even if the covering member 91 is lost, application of an electroconductive tape across the chip resistance 88 and the other external terminal 93 may easily provide impedanceconnection.
Moreover, the construction of the impedance means attached to the lead storage battery itself 87 eliminates the risk to loose the impedance means.
According to the preservation device of the present invention for a lead storage battery, a retainer-type lead storage battery is preserved with an impedance means connected between the external terminals of the lead storage battery.
This restrains transformation of the PbO2 corrosion layer on the collector member surface into an inactive PbSO4 layer.
It is therefore possible to prevent a battery preserved in such preservation device from being decreased in capacity without requiring troublesome maintenance such as supplementary charging at regular tnterevals, even though it is preserved for a long period of time from its forming to the actual use. The present invention thus exhibits a great industrial value.
Claims (14)
1. A preservation device for a preserving during storage a lead storage battery of the kind which includes at least one negative plate, at least one positive plate, at least one separator between said negative and positive plates, and electrolyte holdingly impregnated by said negative and positive plates and said separator and limited in amount such that substantially there is no electrolyte liberated from said negative and positive plates and said separator, and external terminals having one ends respectively connected to said negative and positive plates and the other ends exposed to the outside of the battery casing; the preserving device comprising an impedance means connected between the external terminals of said lead storage battery during its storage time.
2. A preservation device for a lead storage battery as claimed in claim 1, in which the impedance means comprises a resistance.
3. A preservation device for a lead storage battery as claimed in claim 1 or claim 2, in which the impedance means is set to such value that the lead storage battery preserved in the preservation device discharges with a current smaller than that corresponding to the 5-hour rate.
4. A preservation device for a lead storage battery as claimed in any preceding claim, further comprising a housing member for housing the lead storage battery during storage, contact members secured to said housing member and arranged to respectively come into contact with the external terminals of the lead storage battery, and wherein the impedance means is secured to said housing member and connected between said contact members.
5. A preservation device for a lead storage battery as claimed in claim 4, in which the housing member includes a base member and a covering member having a peripheral edge secured to said base member, and the contact members and the impedance means are secured to said base member.
6. A preservation device for a lead storage battery as claimed in claim 4, in which the housing member includes a base member and a covering member having a peripheral edge secured to said base member, said base member having a projection wall for positioning the lead storage battery housed in the housing member, and the impedance means and the contact members are secured to said projection wall.
7. A preservation device for a lead storage battery as claimed in claim 4, in which the housing member includes a base member and a covering member having a peripheral edge secured to said base member, said base member having, at the four sides thereof, cut-up pieces located at the positions thereof outside of the external shape of the lead storage battery when placed on said base member, and one of said cutup pieces has a printed circuit including contact members, and a chip resistance as the impedance means.
8. A preservation device for a lead storage battery as claimed in claim 4, in which the housing member includes a base member and a covering member having a peripheral edge secured to said base member, the contact members and the impedance means being disposed on the inner surface of said covering member, and the impedance means comprises an adhesive tape resistance.
9. A preservation device for a lead storage battery as claimed in claim 4, in which the housing member comprises a case having a concave portion for housing the lead storage battery, and said case is provided with the contact members and the impedance means.
10. A preservation device for a lead storage battery as claimed in any one of claims 1 to 3, further comprising a mounting member mounted on the lead storage battery during the time it is preserved, and contact members secured to said mounting member and arranged to come into contact with the external terminals of the lead storage battery, and the impedance means being secured to said mounting member and connected between said contact members.
11. A preservation device for a lead storage battery as claimed in claim 10, in which the mounting member is a cap covering a portion of the lead storage battery, the impedance means is disposed in a concave portion formed in said cap, and the lead storage battery to which said cap is mounted, is housed in a housing member including a base member and a covering member having a peripheral edge secured to said base member.
12. A preservation device for a lead storage battery as claimed in any one of claims 1 to 3, in which the impedance means is secured directly to the lead storage battery and has one end connected to one external terminal of the lead storage battery, and a covering member for covering the lead storage battery during the time it is preserved, has a connection member for
connecting the other end of the impedance
means to the other external terminal of the lead storage battery.
13. A preservation device for a lead storage battery as claimed in claim 12, in which the connection member comprises a pattern film printed on the covering member.
14. A preservation device for preserving during storage a lead battery, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3768183U JPS59144759U (en) | 1983-03-16 | 1983-03-16 | Lead acid battery storage case |
| JP58043920A JPS59169064A (en) | 1983-03-16 | 1983-03-16 | Storage method of lead storage battery |
| JP58128356A JPS6020461A (en) | 1983-07-13 | 1983-07-13 | Method of shipping lead storage battery |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8406281D0 GB8406281D0 (en) | 1984-04-11 |
| GB2138623A true GB2138623A (en) | 1984-10-24 |
| GB2138623B GB2138623B (en) | 1987-01-14 |
Family
ID=27289547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08406281A Expired GB2138623B (en) | 1983-03-16 | 1984-03-09 | Preservation device for a lead storage battery |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2138623B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1380059A2 (en) * | 2001-04-19 | 2004-01-14 | Zinc Matrix Power, Inc. | Battery case with edge seal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1256980A (en) * | 1969-12-19 | 1971-12-15 | ||
| GB2119161A (en) * | 1981-12-28 | 1983-11-09 | Sanyo Electric Co | Lead acid battery and method of storing it |
-
1984
- 1984-03-09 GB GB08406281A patent/GB2138623B/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1256980A (en) * | 1969-12-19 | 1971-12-15 | ||
| GB2119161A (en) * | 1981-12-28 | 1983-11-09 | Sanyo Electric Co | Lead acid battery and method of storing it |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1380059A2 (en) * | 2001-04-19 | 2004-01-14 | Zinc Matrix Power, Inc. | Battery case with edge seal |
| EP1380059A4 (en) * | 2001-04-19 | 2009-12-23 | Zpower Inc | Battery case with edge seal |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8406281D0 (en) | 1984-04-11 |
| GB2138623B (en) | 1987-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19980309 |