WO2021071459A2

WO2021071459A2 - An electrolyte anti-leakage accumulator cover

Info

Publication number: WO2021071459A2
Application number: PCT/TR2020/050921
Authority: WO
Inventors: Ali Ünlü; Ugur GÜNDÜZ
Original assignee: Uenlue Ali; Guenduez Ugur
Priority date: 2019-10-10
Filing date: 2020-10-07
Publication date: 2021-04-15
Also published as: WO2021071459A3

Abstract

The invention is related to plastic and/or plastic derived accumulator covers. The invention is particularly related to a plastic accumulator cover which is in contact with at least one cell of an accumulator case and comprises at least one gas collecting reservoir available within the cover, which extends up to one of the short walls of the cover.

Description

AN ELECTROLYTE ANTI-LEAKAGE ACCUMULATOR COVER

TECHNICAL FIELD OF THE INVENTION

The invention relates to plastic and/or plastic derived accumulator covers. The invention particularly relates to the plastic accumulator cover which is in contact with at least one cell of an accumulator case and consists of at least one gas collecting reservoir existing within the cover and extending up to one of the short walls of the cover.

BACKGROUND OF THE INVENTION (PRIOR ART)

The gases formed during the recharge of most lead acidic accumulator covers are released through at least one gas collecting channel, which is placed within the cover and extends up to one of the short walls of the cover, and a round hole at the outside of the channel. The gases are aimed to be discharged at the point farthest to the possible sparking sources. In terms of accumulator safety, the demand of the car manufacturers for the prevention release of the acid within the accumulator in case of any shakes and tremors on the various sides of the accumulator becomes inevitable day by day. Moreover, during the release of the electrolyte vapor and the gases formed in the recharge and discharge cycles, it is utmost important to prevent the release of the electrolyte and to return the electrolyte into the accumulator in liquid form, and thus to increase the lifetime of the accumulator by preventing electrolyte loss. It has become obligatory to take action to limit and prevent the acid leakage from the accumulator in case of any shakes and tremors.

In the present system, accumulator covers presenting solutions for such demands have been provided. In the invention with the patent document numbered EP2332196B1 of the prior art, an accumulator cover that comprises a gas collector, which is in communication with the cells of the accumulator case and which extends to the short side of the accumulator cover has been disclosed. The invention comprises a gas collector which is placed within the cover and in contact with at least one cell of accumulator case, which extends up to one of the short side walls of the cover. The gas collector within the accumulator cover is placed in a cavity. A plate which covers the cavity, which is equipped with a ventilation hole, has been provided. A sintered pellet is available within the cavity. All the gases pass through the sintered pellet and then they are released from the discharge hole. This opening enables the discharge of the gases within the accumulator.

The invention numbered EP2332196B1 of the prior art, relates to an accumulator cover containing a gas collector which extends up to one of the side walls of the accumulator cover and is in contact with at least one cell of an accumulator case. A cavity that is located at the side wall of the cover has been balanced laterally relative to the gas collector. A lateral channel at the side wall connects the gas collector to the cavity. A plate that has a discharge hole, covers this cavity. A sintered pellet is placed into this cavity. Gases within the accumulator pass through the sintered pellet and then they are released out via discharge hole.

In the present system, although design measures have been taken, accumulators may leak and electrolyte loss may occur in case of challenging conditions. Moreover, in some cases, the gas intended to be discharged may react at the outlet of the discharge hole and it may catch a flame.

A technology related to a cover which can meet the demands for acid flow within an accumulator, which can extend the lifetime of an accumulator by providing sealing and which can ensure vehicle safety is required.

BRIEF DESCRIPTION OF THE INVENTION AND OBJECTIVES

The present invention relates to plastic accumulator covers which are aimed to eliminate the aforementioned disadvantages, and to bring about new advantages to the related technical field, wherein said covers are in contact with at least one cell of the accumulator case and are placed within the cover, and extend to one or both of the short walls of the cover, and comprise at least one gas collecting reservoir.

The aim of the present invention is to provide an accumulator cover, which provides better protection against accumulator leakage and explosion, and which can discharge the gases that have been formed by means of reactions within the accumulator. The present invention is characterized by meeting these requirements by means of employing gravity force through the principle of the static level difference of liquid.

The labyrinth design in the present invention enables the electrolyte in the gas and liquid form to lose its energy as much as possible before arriving at the gas discharge point by means of the labyrinth structure on the fluid path, and enables the liquid to remain within the accumulator, allowing it to return to the cell by employing static level difference.

Definitions of the Figures Describing the Invention

For clarity, the plastic and/or plastic derived accumulator covers developed with this invention are as follows.

Figure 1- Perspective view of the accumulator

Figure 2- View of accumulator cover and exploded pellet cover according to Figure 1 Figure 3- Right view of accumulator cover according to Figure 2 Figure 4- Detailed view of accumulator cover Figure 5- A-A cross-section view of cover according to Figure 3 Figure 6- Front view of pellet cover

Figure 7- B-B cross-section view of pellet cover according to Figure 6 Figure 8- Right view of cover with pellet cover inserted

Figure 9- C-C cross-section view of inserted pellet cover according to Figure 8

Definition of the Elements and Parts Forming the Invention In order to further describe the plastic and/or plastic derived accumulator covers developed with this invention, the parts and elements in the figures have each been numbered and their references have been listed below.

1. Cover

2. Accumulator case 3. Pellet cover

4. Battery cap

5. Battery terminal

6. Positive terminal side wall

7. Negative terminal side wall 8. First opening

9. Gas collector

10. Pellet cavity

11. Vertical passage cavity 12. Passage wall

13. Upper wall of housing

14. Lower wall of housing

15. Second side wall of the housing

16. First side wall of the housing 17. Pellet housing counterpart

18. Gas collector reservoir

19. Intermediate wall

20. Second vertical wall

21. Horizontal gas channel 22. Sintered pellet

23. Recirculation reservoir

24. Third vertical wall

25. Horizontal opening

26. Pellet housing 27. Gas discharge hole

28. Pellet cover housing

29. First vertical wall

30. Constriction protuberance

31. Collector cavity 32. Upper wall of the gas collector reservoir

DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the novelty subject to the invention is described with embodiments that have been provided to further describe the invention without having a limited effect.

The aim of the present invention is to provide an accumulator cover (1), which provides better protection against accumulator leakage and explosion, and can discharge the gases that are formed by means of reactions within the accumulator. The invention is characterized in that it employs gravity force by means of the principle of the liquid static level difference and meeting these requirements.

The invention particularly relates to plastic accumulator covers (1), which are in contact with at least one cell of an accumulator case (2), and that extend up to one of the lateral walls of the cover (the positive terminal side wall (6) and the negative terminal side wall (7)), and which consists of at least one gas collecting reservoir (18) to which gas collector (9) is connected and which serves as a gas collector. The upper wall of the gas collector reservoir (32) is positioned so as to be tangential to the gas collector (9).

In order to maintain the durability of the accumulators throughout the product lifetime, it is utmost significant to prevent the outward overflow of the expanded electrolyte due to heating and chemical reactions taking place during the recharge of the accumulator.

It is possible to return the gas to be released outside of the accumulator cell in liquid form by passing it through the gas collector (9) within the cover (1) and separating the moist electrolyte vapor without allowing the vapor to be released outside.

The electrolyte loss is eliminated by means of said invention with the feature of the labyrinth system directing the gas flow regime and preventing the electrolyte to leak out to the external environment, where said labyrinth system is positioned to the positive terminal side wall (6) and/or the negative terminal side wall (7) of the cover (1) in the pellet cover housing (28), that is circled by the upper wall of the housing (13) at the top section, the lower wall of the housing (14) at the bottom section, and by the first side wall of the housing (16) on one side, and the second side wall of the housing (15) on the other side.

The labyrinth system which serves as gas routing partitions prevents the outward leakage of the electrolytes and thus acid loss. The labyrinth design in the present invention enables the electrolyte in gas and liquid form to lose its energy as much as possible before arriving at the gas discharge point by means of labyrinth structure on the fluid path, and enables the liquid to remain within the accumulator, allowing it to return to the cell by employing the static level difference. With this method it is aimed to reduce the leakage (liquid leakage) and thus to prolong the accumulator usage life. In the case that the liquid static level exceeds the axis level of the gas collector (9), the liquid is forced to return to the accumulator cell without reaching the upper parts, thanks to the lateral gas channel (21) that has been placed into the labyrinth system, which is located within the pellet cover housing (28), that is circled by the upper wall of the housing (13) at the top section, the lower wall of the housing (14) at the bottom section, and by the second side wall of the housing (15) on one side, and the first side wall of the housing (16) on the other side, and that is positioned to the positive terminal side wall (6) and/or the negative terminal side wall (7) of the central axis of the central gas collector (9), where the moist gas (electrolyte and gas mixture) is discharged, The return of the electrolyte into the accumulator is enabled by the gravity force. This ensures electrolyte sealing of the accumulator.

By means of the labyrinth configuration, it is ensured that the electrolyte is rapidly recovered and the moist gas (gas and electrolyte mixture) is returned into the cell in liquid form before reaching the discharge point. This design prevents liquid leakage and thus electrolyte loss and therefore vehicle safety is ensured. The labyrinth wall height is one of the important factors ensuring the sealing. The gas to be discharged passes through the gas collector (9) within the cover (1), and then the electrolyte vapor is condensed without having a chance to be released out and it is enabled to be returned to the accumulator cell in liquid form. The electrolyte collected in the reservoir is ensured to return into the accumulator.

The labyrinth system serving as gas and liquid routing partitions ensure acid recirculation and prevents acid loss. This system guarantees the prevention of electrolyte leakage from the accumulator in events such as various bumps and rotations in any direction.

The labyrinth system within this pellet cover housing (28) and the design of pellet cover (3) coating the pellet cover housing (28) preventing the liquid passage ensures the liquid to return to the central gas collector (9) and to discharge only the gases by passing them through the horizontal gas channel (21) parallel to the upper wall of the housing (13), and ensures the maintenance of pressure balance in the accumulator. Gases are released by passing through a flame arrestor and a sintered pellet (22). With its flame arrestor feature, the sintered pellet (22) prevents the entry of flames into the accumulator. When the vehicle in which the accumulator is used is shaken, tremored or overturned due to an accident, the electrolyte located in the accumulator case (2) should not leak out from the accumulator. In such cases, in order to minimize the leakage, the gas collector (9) extending from the positive terminal side wall (6) to the negative terminal side wall (7) within the cover (1) are positioned such that they shall connect the battery caps (4) and thus the accumulator case (2) cells to each other. This gas collector (9) is in contact with the cells via the battery caps (4).

By means of the design that shapes the electrolyte flow path, formed by the labyrinth channels that provide sealing and by means of the gas collector (9) positioned inside the cover (1) the release of the electrolyte to the outer environment is prevented through the design based on the principle of liquid being returned in the accumulator when said electrolyte reaches the maximum static level within the structure. This design allows only safe gas release.

The plastic accumulator cover (1) is positioned on the accumulator case (2). At least one pellet cover (3) positioned over the accumulator cover (1) and a sintered pellet (22) placed over the pellet housing (26) within the said pellet cover (3) has been provided. At least one pellet housing (28) positioned over the said cover (1), which enables the pellet cover (3) to be fixed tight to the accumulator cover (1), houses said pellet cover (3). The said pellet cover housing (28) contains at least one pellet cavity (10) and at least one collector cavity (31).

The invention consists of these main parts; a gas collector (9) that opens to the pellet cover housing (28) encircled by the upper wall at the top (13) section, the lower wall at the bottom (14) section, the second side wall of the housing (15) on one side, and the first side wall of housing (16) on the other side, which is located at a positive terminal side wall (6), and/or a negative terminal side wall (7) of the plastic accumulator cover (1); a gas collector reservoir (18) that aims to collect the electrolyte positioned in the pellet cover housing (28), a first vertical wall (29), a second vertical wall (20), and a third vertical wall (24) that are vertical to the upper wall of the housing (13) and to the lower wall of the housing (14) and that are parallel to the second side wall of the housing (15) and to the first side wall of the housing (16) and that direct the electrolyte flow in the pellet cover housing (28); and a first opening (8), a horizontal opening (25) and a constriction protuberance (30) that connects the channels that remain between the first vertical wall (29), the second vertical wall (20), the third vertical wall (24) and the gas collector reservoir (18), a recirculation reservoir (23) in which the electrolyte that is carried by the gas collector (9) is collected temporarily, after being collected in the gas collector reservoir (18) and passing through the first opening (8), a horizontal gas channel (21) which remains between the gas collector reservoir (18) and the upper wall of the housing (13) and which is parallel to the upper wall of the housing (13), a pellet cavity (10) containing the pellet housing counterpart (17) to which the mounted sintered pellet (22) leans on, the vertical passage wall (12) limiting the gas passage through the collector cavity (31) from this pellet cavity (10), and a vertical passage cavity (11) located on the passage wall, a pellet cover (3) mounted suitably to the pellet cover housing (28), a pellet housing (26) housing the sintered pellet (22) in the pellet cover (3), a round gas discharge hole (27) that enables the discharging of gases.

An accumulator case (2) that forms the main frame of the accumulator is located in the area in which the lead based plates are housed and the energy and chemical reactions are stored. After the mounting of the accumulator cover (1), the pellet cover (3) should be used to cover the pellet cover housing (28).

A gas collector (9) is placed into the cover (1) which passes through the centers of the battery caps (4) and extends from the positive terminal side wall (6) to the negative terminal side wall

(7). The gas collector (9), which extends up to one of the positive terminal side walls (6) or the negative terminal side walls (7) of the cover (1) or to the both of them, reaches up to the pellet cover housing (28) and has a gas discharge hole (27) external opening. The gas collector (9), which extends up to one of the positive terminal side walls (6) and/or the negative terminal side walls (7) connect the battery caps (4) and therefore the cells of the accumulator case (2) to each other. This provides contact with the inner parts of the cells.

A pellet cover housing (28) is located in one or both of the positive terminal side wall (6) or the negative terminal side walls (7). The gas collector (9) opens up to the gas collector reservoir (18) that is located in the pellet cover housing (28). The pellet cover housing (28) consists of a gas collector (9) opening to the gas collector reservoir (18), and a first opening

(8), that connects the channels that remain between the first the vertical passage opening (29), a second vertical wall (20), a third vertical wall (24) and a passage wall (12), a vertical passage opening (11), a horizontal opening (25) and a constriction protuberance (30) and one pellet cavity (10) serving as a labyrinth. The pellet cover (3) comprising one gas discharge hole (27) covers the pellet cover housing (28) and therefore the pellet cavity (10). The pellet cover (3) comprises a sintered pellet (22) placed into the pellet housing (26). This can be seen in Figure 6 and Figure 7. When the pellet cover (3) is placed into the pellet cover housing (28), the sintered pellet (22) leans on the pellet housing counterpart (17). Before the gases coming to the pellet cavity (10) are released by means of the gas discharge hole (27), they pass through the sintered pellet (22) which acts as a flame arrestor. The sintered pellet (22) having a porous structure is placed vertically into the pellet housing (26).

The gas collector (9) opens up to the pellet cover housing (28) which is encircled by the upper wall of the housing (13) at the top section, the lower wall of the housing (14) at the bottom, section, and the first side wall (16) and the second side wall (15) from the sides that are located on the positive terminal side wall (6) and/or the negative terminal side wall (7). The electrolyte mixture within the accumulator passes from the gas collector (9) to the gas collector reservoir (18). When the electrolyte, passes from the narrow gas collector (9) channel to the large volume gas collector reservoir (8), its velocity slows down. When the gas moves to the pellet cavity (10) through the vertical passage cavity (11), the horizontal opening (25) and the constriction protuberance (30) and the through the first opening (8), which connects the channels between the first vertical wall (29), the second vertical wall (20), the third vertical wall (24) and the passage wall (12) which altogether serve as a labyrinth, the liquid accumulates within the gas collector reservoir (18) and it returns to the accumulator from the gas collector (9). Thanks to the constriction protuberance (30), the remaining area does not exceed 3 mm . The electrolyte accumulating with the gas collector reservoir (18) passes through the first opening (8) on the gas collector reservoir (18), and fills into the recirculation reservoir (23) which is located between the gas collector reservoir (18) and the vertical wall (29). The center of the gas collector (9) and the bottom plane of the first opening (8) are horizontally on the same axis. However, the bottom plane of the horizontal gas channel (21) between the upper wall of the housing (13) and the gas collector reservoir (18) is minimum 4mm higher than the center of the gas collector (9). The horizontal gas channel (21) is parallel to the upper wall of the housing (13). It is not physically possible for the liquid to pass onto the horizontal gas channel (21) whose static level is higher. In this case, the electrolyte accumulated within the recirculation reservoir (23) is forced to return to the gas collector reservoir (18), where the gas collector (9) exists, by returning through the first opening (8), and finally returning to the accumulator via the gas collector (9). By means of the gas flow regime directing feature of the labyrinth system located within the pellet cover housing (28) that is positioned in one or both of the positive terminal side wall (6) and the negative terminal side wall (7) of the cover (1), said invention reduces electrolyte loss. The labyrinth system consisting of a vertical wall (29) serving as gas directing partitions, a horizontal gas channel (21) limited by the upper wall of the housing (13), a second vertical wall encircled by the second wall of the housing (15) and a third wall of the housing (24) at the side, and the lower wall of the housing (14) and a passage wall (12) at the bottom, ensures electrolyte recirculation and prevents liquid loss.

The labyrinth design enables the electrolyte in the gas form to lose its energy as much as possible before reaching the pellet cavity (10) and the gas discharge hole (27), and it enables the liquid to be held within the gas collection reservoir (18) and the recirculation reservoir (23) and for it to be returned to the accumulator cells via the gas collector (9). This method aims to reduce the leakage (liquid loss) and thus extends the accumulator life. It is possible to return the electrolyte to the accumulator cell before said electrolyte finds a chance to be released to the outer environment.

Only gas escapes from the first opening (8) within the gas collector reservoir (18) and it fills into the recirculation reservoir (23) located between the gas collector reservoir (18) and the first vertical wall (29). It reaches the pellet cavity (10) after passing through the horizontal gas channel (21), the channel remaining between the first side wall of the housing (16), the second vertical wall (20), and the channel remaining between the second side wall of the housing (20), the third vertical wall (24), and finally the vertical passage cavity (11) located on the horizontal opening (25) and the passage wall (12), respectively.

The pellet cover housing (28) is covered by the pellet cover (3). The sintered pellet (22) is located within the pellet housing (26) which is in the pellet cover (3) that leans on the pellet housing counterpart (17) within the pellet cavity (10). Therefore, after the gases move towards the pellet cavity (10) from the gas collector (9), through the vertical passage cavity (11), the horizontal opening (25) and the second cavity (30) and the first opening (8), which connect the channels between the first vertical wall (29), the second vertical wall (20), the third vertical wall (24), the vertical passage wall (12), they pass through the sintered pellet (22) that is located across the pellet cavity (10) and they are discharged from the gas discharge hole (27) located on the pellet cover (3). The pellet cover (3) being one of the elements of the invention covers up the pellet cover housing (28) on the side wall of the cover (1). It complies with the pellet cover housing (28). The pellet cover (3) comprises the pellet housing (26) which houses the sintered pellet (22) having a porous structure and flame arresting feature.

The battery caps (4) that are one of the elements of the invention, provide contact between the cells. They regulate the inner pressure of the accumulator. The gas collector (9) passes through the center of the battery caps (4) and extends from one of the walls of the cover (1) (the positive terminal side wall (6) and the negative terminal side wall (7)) up to the other side wall (the positive terminal side wall (6) and the negative terminal side wall (7)).

The battery terminal (5) provides conductivity.

The pellet cover housing (28) is located on one or both of the positive terminal side wall (6) and the negative terminal side wall (7). The gas collector (9) extending from the positive terminal side wall (6) and the negative terminal side wall (7) provides connection of the battery caps (4) and the cells of the accumulator case (2) with each other. The pellet cover (3) is mounted into the pellet cover housing (28) positioned on the positive terminal side wall (6) and/or the negative terminal side wall (7). The pellet cover housing (28) consists of at least one pellet cavity (10) and at least one collector cavity (31). The pellet cover housing (28) comprises a first opening (8), that connects the channels that remain between the gas collector reservoir (18), and the second vertical wall (20), third vertical wall (24) the first vertical wall (29), the second vertical wall (20), the third vertical wall (24), and the first vertical wall (29) that are vertical to the first side wall of the housing (16) and the lower wall of the housing (14), and perpendicular to the upper wall of the housing (13) and the lower wall of the housing (14), a horizontal opening (25) and a constriction protuberance (30) which enable to direct the electrolyte flow in the collector cavity. The electrolyte and gas mixture that has accumulated in the gas collector reservoir (18) passes to the recirculation reservoir (23) by means of the first opening (8).

The gas collector (9) located in the cover (1) extending from the positive terminal side wall (6) up to the negative terminal side wall (7) is positioned such that it connects the battery caps (4) and therefore the accumulator case (2) cells to each other. The sulfuric acid solution is prevented from being discharged out to the environment by means of the gas collector (9) positioned within the cover (1) and the design based on the principle that the liquid returns to the accumulator when the electrolyte reaches the maximum static level within structure through the design that shapes the electrolyte flow route. The gas collector (9) opens up to the gas collector reservoir (18) that is located in the pellet cover housing (28). The upper wall of the gas collector (32) is positioned so as to be tangential to the gas collector (9). When the electrolyte and gas mixture passes from the narrow gas collector (9) channel to the gas collector reservoir (8), it slows down. When the gas moves towards the pellet cavity (10) through the first opening (8), the vertical passage cavity (11), the horizontal opening (25), and the constriction protuberance (30), that altogether act as a labyrinth and that connect the channels remaining between the passage wall (12), the second vertical wall (20), the third vertical wall (24) and the first vertical wall (29), the liquid accumulates within the gas collector reservoir (18) and it returns to the accumulator via the gas collector (9). The center of the gas collector (9) and the bottom plane of the first opening (8) are located on the same axis. However, the level of the horizontal gas channel (21) remaining between the upper wall of the housing (13) and the gas collector reservoir (18) is higher than the center of the gas collector (9). It is not physically possible for the liquid level to pass onto the horizontal gas channel (21) whose static level is higher. In this case, the electrolyte accumulated within the recirculation reservoir (23) is forced to return to the gas collector reservoir (18), where the gas collector (9) exists, by returning through the first opening (8), and finally returning to the accumulator via the gas collector (9). The labyrinth design enables the electrolyte in the gas and liquid form to lose its energy as much as possible before arriving at the pellet cavity (10) and therefore the gas discharge point (27) by means of the labyrinth structure on the fluid path, and enables the liquid to return to the accumulator cells via the gas collector (9) by turning into liquid. This method aims to reduce the leakage (liquid loss) and thus extends the accumulator life. It is possible to return the electrolyte to the accumulator cell before said electrolyte finds a chance to be released to the outer environment.

A pellet cavity (10) comprising the pellet housing counterpart (17) to which mounted sintered pellet (22) leans on is available in the pellet cover housing (28). A vertical passage wall (12) and a vertical opening (11) located on the vertical passage wall (12) is available which limits the gas passage to the pellet cavity (10) from the collector cavity (31). The sintered pellet (22) is located within the pellet housing (26) located in the pellet cover (3) that leans on the pellet housing counterpart (17) located in the pellet cavity (10).

The vertical passage wall (12) and the vertical passage cavity (11) located on the passage wall limits the gas passage to the pellet cavity (10). The labyrinth system consisting of a vertical wall (29) a horizontal gas channel (21) limited by the upper wall of the housing (13), a second vertical wall (20) encircled by the wall of the housing (15) and a third wall of the housing (24) from the side, and the lower wall of the housing (14) and a passage wall (12) at the bottom, that serve as gas directing partitions, ensures electrolyte recirculation and prevents liquid loss.

A pellet cover housing (28) which is located at least one of the side walls (the positive terminal side wall (6) and/or the negative terminal side wall (7)) of the plastic accumulator cover (1) has been provided, which is encircled by the upper wall at the top (13) section, the lower wall at the bottom (14) section, and side walls each side (the second side wall of the housing (15), and the first side wall of housing (16)). The pellet cover housing (28) which is encircled by the upper wall at the top (13) section, the lower wall at the bottom (14) section, the second side wall of the housing (15), and the first side wall of housing (16) is formed of at least one pellet cavity (10) and at least one collector cavity (31) separated from each other by a passage wall (12).

The pellet cavity (10) comprises the pellet housing counterpart (17) to which the mounted sintered pellet (22) leans on. The pellet cover housing (28) is covered by the pellet cover (3).

The pellet cover housing (28) has a gas collector reservoir (18) positioned in the collector cavity (31). After the electrolyte and gas mixture carried by the gas collector (9) is collected in the gas collector reservoir (18), it passes through the first opening (8) and accumulates for a temporary period of time, in the recirculation reservoir (23). The electrolyte accumulating in the gas collector reservoir (18) passes through the first opening (8) located on the gas collector reservoir (18), and it fills into the recirculation reservoir (23) which is located between the gas collector reservoir (18) and the first vertical wall (29). The center of the gas collector (9) and the bottom plane of the first opening (8) are on the same axis. However, the bottom plane of the horizontal gas channel (21) between the upper wall of the housing (13) and the gas collector reservoir (18) is higher than the center of the gas collector. It is not physically possible for the liquid to pass onto the horizontal gas channel (21) whose static level is higher. In this case, the electrolyte accumulated within the recirculation reservoir (23) is forced to return to the gas collector reservoir (18), where the gas collector (9) exists, by returning through the first opening (8), and finally returning to the accumulator from the gas collector (9).

The gas moves towards the pellet cavity (10) through the openings (the first opening (8), the vertical passage cavity (11), the horizontal opening (25)) which connect the channels that remain between the vertical walls (the passage wall (12), the second vertical wall (20), the third vertical wall (24)) the first vertical wall (29)) and the intermediate wall (19) which serve as a labyrinth. The horizontal gas channel (21) remains between the gas collector reservoir (18) and the upper wall of the housing (13). It cuts off the velocity of the gas and slows down the gas that is received from the recirculation reservoir (23) by means of the constriction protuberance (30) located on the channel. The constriction protuberance (30) is the element that narrows the electrolyte and gas mixture passage route. The second vertical wall (20) is coupled with the wall facing the first wall of the housing (16) of the gas collector reservoir (18) and perpendicular to the lower wall of the housing (14) and the upper wall of the housing (13). It directs the gas received from the horizontal gas channel (21) to the lower wall of the housing (14). The third vertical wall (24) is coupled with the lower wall (14) facing the second wall of the housing (20) and the first wall of the housing (16) of the gas collector reservoir (18) and it is perpendicular to the lower wall of the housing (14). It directs the gas towards the upper wall of the housing (13). The horizontal opening (25) between the wall facing the passage wall (12) of the gas collector reservoir (18) and the intermediate wall (19) directs the gas towards the pellet cavity (10).

The sintered pellet (22) is placed in the pellet housing (26) within said pellet cover (3). The pellet housing (26) in the pellet cover (3) houses the sintered pellet (22). The gases pass through the flame arresting sintered pellet (22) and are released out to the environment.

The round gas discharge hole (27) enables the gas to be released out to the environment. Inside the cover (1) there exists one gas collector (9) passing through the centers of the battery caps (4) and extending from the positive terminal side wall (6) up to the negative terminal side wall (7) of the cover (1). The gas collector (9) reaches up to the pellet cover housing (28) and a round gas discharge hole (27) has been provided at the outer side of the collector. The gases are discharged from the gas discharge hole.

At least one pellet cover housing (28) that comprises at least a pellet cavity and at least a collector cavity (31), that enables the pellet cover (3) to be fixed to the accumulator cover (1) by means of welding, houses said pellet cover (3). The pellet cover housing (28) encircled by the upper wall at the top (13) section, the lower wall at the bottom (14) section, the second side wall of housing (15), and the first side wall of housing (16) at both sides is located on the positive terminal side wall (6) and/or on the negative terminal side wall (7) of said plastic accumulator cover (1). The gas collector (9) opens up to the pellet cover housing (28). The pellet cover (3) is mounted into the pellet cover housing cavity (28).

Claims

1. An electrolyte anti-leakage accumulator cover formed at least one pellet cavity (10) and at least one collector cavity (31) separated from each other by a passage wall (12), comprising at least one pellet cover housing (28) encircled by the upper wall of the housing (13), the lower wall of the housing (14), the second side wall of the housing (15) and the first side wall of the housing (16); characterized in that said collector cavity (31) comprises;

• a central gas collector (9) that discharges the electrolyte and gas mixture,

• a gas collector reservoir (18) where the electrolyte and gas mixture within the accumulator are collected,

• a first vertical wall (29) that is coupled with the wall facing the passage wall (12) of the gas collector reservoir (18) and perpendicular to the upper wall of the housing (13), which directs the electrolyte and gas mixture that has accumulated in the gas collector reservoir (18) to the horizontal gas channel (21),

• a recirculation reservoir (23) which remains between the gas collector reservoir (18) and the first vertical wall (29), in which the electrolyte and gas mixture is temporarily collected,

• a first opening (8) that is located at the wall that faces the first vertical wall (29) of the gas collector reservoir (18) and whose bottom plane is coaxial with the center of the gas collector (9),

• an upper wall of the gas collector (32) that is tangential to the gas collector (9),

• a horizontal gas channel (21) located between the upper wall (32) of the gas collector reservoir and the upper wall of the housing (13),

• the constriction protuberance (30) that narrows down the passage area of the electrolyte and gas mixture located between the recirculation reservoir (23) and the horizontal gas channel (21).

2. An accumulator cover according to the Claim 1 characterized in that it comprises, a second vertical wall (20) that is coupled with the wall that faces the first side wall of the housing (16) of the gas collector reservoir (18) and that is perpendicular to the lower wall (14) and the upper wall (13) of the housing, which directs the gas received from the horizontal gas channel (21) to the lower wall of the housing (14).

3. An accumulator cover according to the Claim 1 characterized in that it comprises, a third vertical wall (24) that is coupled to the lower wall of the housing (14) located between the wall that faces the first side wall (16) of the gas collector reservoir (18) and the second vertical wall (20), that is vertical to the lower wall (14) of the housing and that directs the gas towards the upper wall (13) of the housing.

4. An accumulator cover according to the Claim 1 characterized in that it comprises an intermediate wall (19) which is vertical to the passage wall (12) and coupled to the collector cavity (31) side of the passage wall (12).

5. An accumulator cover according to the Claim 1 characterized in that it comprises a horizontal opening (25) that remains between the wall facing the passage wall (12) of the gas collector reservoir (18) and the intermediate wall (19).

6. An accumulator cover according to the Claim 1 characterized in that it further comprises a pellet cover (3).

7. An accumulator cover according to the Claim 6 characterized in that said pellet cover (3) comprises a sintered pellet (22), a pellet housing (26) that houses the pellet (22), and a round gas discharge hole (27) which enables to discharge the gasses to the outer environment.