Lead acid storage battery
View Patent ↗A lead acid storage battery according to the present invention comprises a battery container for housing a plurality of cells, a middle lid for covering the battery container, and an upper lid for covering the middle lid, wherein, on the upper surface of the middle lid, a gas discharging port for discharging the gas generated inside of the cell and an electrolyte recirculating port for recirculating the moisture to be discharged along with the gas within the cell are formed as corresponding to each cell. A plurality of exhaust chambers separated by an exhaust chamber partition are formed in a space surrounded by the middle lid and the upper lid, and a mechanism for collectively exhausting the gas discharged from the gas discharging port to the outside of the battery by interconnecting the plurality of exhaust chambers is comprised.
1. A lead acid storage battery comprising:
a battery container housing a plurality of cells;
a middle lid arranged so as to cover the battery container; and
an upper lid arranged so as to cover the middle lid,
wherein, on an upper surface of the middle lid, gas discharging ports are formed for discharging gas generated inside of the cells, respectively, and electrolyte recirculating ports are formed for recirculating moisture to be discharged along with the gas within the cells, respectively,
wherein at least a plurality of exhaust chambers are formed in a space surrounded by the middle lid and the upper lid such that adjacent ones of the exhaust chambers are separated by an exhaust chamber partition, the plurality of exhaust chambers being interconnected for collectively exhausting the gas discharged from the gas discharging ports to an outside of the battery,
and wherein at least one of the upper lid and the middle lid comprises a high thermal conduction member and porous members, the high thermal conduction member having a thermal conductivity higher than that of a member composing a wall surface of the exhaust chambers, the porous members being arranged on a bottom surface of the upper lid such that a porous member is provided in each of the cells, the porous members being made of porous material.
2. The lead acid storage battery according to claim 1 , wherein a recessed portion is formed on the upper surface of the middle lid, and at least one of a part of the upper lid and a peripheral edge surrounding the recessed portion of the middle lid is provided with the high thermal conduction member.
3. The lead acid storage battery according to claim 1 , wherein the number of exhaust chambers formed in the space surrounded by the middle lid and the upper lid is equal to the number of cells, wherein a concentration exhaust chamber is formed in the space surrounded by the middle lid and the upper lid, and wherein a notched part or a through hole is provided in each exhaust chamber partition so as to interconnect adjacent discharging ports such that the gas discharged from the gas discharging ports is converged into the concentration exhaust chamber, and thereby collectively exhausting the converged gas out of the battery.
4. The lead acid storage battery according to claim 2 , wherein at least one of a part of the upper lid and a surface of the peripheral edge of the middle lid is provided with the high thermal conduction member.
5. The lead acid storage battery according to claim 2 , wherein at least one of a part of the upper lid and the peripheral edge of the middle lid is provided with the high thermal conduction member embedded therein.
6. The lead acid storage battery according to claim 1 , wherein, on a bottom surface of the upper lid, a protrusion is formed between adjacent exhaust chamber partitions.
7. The lead acid storage battery according to claim 4 , wherein, on a bottom surface of the upper lid, a protrusion is formed between adjacent exhaust chamber partitions.
8. The lead acid storage battery according to claim 5 , wherein, on a bottom surface of the upper lid, a protrusion is formed between adjacent exhaust chamber partitions.
9. The lead acid storage battery according to claim 6 , wherein, on an upper surface of the upper lid, a recessed portion is formed at a location corresponding to a location where the protrusion is formed on the bottom surface of the upper lid, wherein the high thermal conduction member has an engaging protrusion, and wherein the high thermal conduction member is arranged on the upper surface of the upper lid such that the engaging protrusion engages with the recessed portion of the upper lid.
10. The lead acid storage battery according to claim 7 , wherein, on an upper surface of the upper lid, a recessed portion is formed at a location corresponding to a location where the protrusion is formed on the bottom surface of the upper lid, wherein the high thermal conduction member has an engaging protrusion, and wherein the high thermal conduction member is arranged on the upper surface of the upper lid such that the engaging protrusion engages with the recessed portion of the upper lid.
11. The lead acid storage battery according to claim 2 , wherein, on a bottom surface of the upper lid, a protrusion is formed between adjacent exhaust chamber partitions.
12. The lead acid storage battery according to claim 3 , wherein, on a bottom surface of the upper lid, a protrusion is formed between adjacent exhaust chamber partitions.