Pole piece protecting method for prolonging dry storage life of zinc-silver battery
A storage life, zinc-silver battery technology, applied in the direction of primary battery use/maintenance, etc., can solve the problems of zinc-silver battery dry storage life requirements, use requirements, discharge voltage drop, etc., to achieve dry storage life The effect of prolonging, reducing the number of replacements, and inhibiting the oxidation of the negative electrode
Active Publication Date: 2013-04-17
SHANGHAI INST OF SPACE POWER SOURCES
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Problems solved by technology
After a certain period of storage, the battery will experience discharge voltage drop and capacity attenuation, resulting in poor emergency use flexibility and even failure to meet the use requirements.
[0005] At present, the dry storage life of zinc-silver batteries is generally only 5 to 8 years, which can no longer meet the demand for dry storage life of zinc-silver batteries for future missiles, launch vehicles and other equipment (more than 12 years).
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[0019] It can be seen from the background technology that the dry storage life of zinc-silver batteries in the prior art is short. The inventors believe that the reasons for the decline in electrical performance during dry storage of zinc-silver batteries are mainly the decomposition of positive active materials, oxidation of negative active materials and aging of the diaphragm. .
[0020] During storage, the AgO in the positive plate is prone to the following decomposition reactions:
[0021]
[0022] This reaction represents the decomposition of AgO into Ag 2 O and oxygen, this reaction not only affects the capacity of the battery, but also affects the voltage of the battery. This reaction also has Ag 2 The generation of O will cause the voltage of the battery to drop, and at the same time, oxygen will be generated, which not only reduces the content of AgO, the active material of the positive electrode, but also gradually reacts with the active zinc powder of the ne...
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The invention discloses a pole piece protecting method (film forming agent soaking method) for prolonging a dry storage life of a zinc-silver battery. A formed and dried positive pole piece and a formed and dried negative pole piece are respectively soaked in film forming agents with different concentrations for a certain time and then thin protective films are generated on the surfaces of the pole pieces; through the adoption of the protective films, substance and energy exchanging between the pole pieces and outside environment is isolated, the positive pole decomposition is greatly reduced and the oxidation of the negative pole is further suppressed, so that the capacity loss of the battery is reduced. Through the adoption of the pole piece protecting method disclosed by the invention, the dry storage life of the zinc-silver battery can be prolonged from the current 5-8 years to 12 years or longer; and moreover, the protected pole piece has no influence on pole piece discharging. The pole piece protecting method for prolonging the dry storage life of the zinc-silver battery, disclosed by the invention, has the advantage that the dry storage life of the zinc-silver battery is prolonged and is used for weaponries with higher requirements on long storage life, such as missiles and rockets.
Description
[0001] technical field [0002] The invention relates to a technique for prolonging the storage life of a zinc-silver battery in a dry state, in particular the application of a battery with a long storage life is related to the invention. The invention is used for weapons and equipment such as missiles and rockets with higher storage life requirements. Background technique [0003] The zinc-silver battery life extension technology applied for patent in 1988 (CN 87202960, 1988) represents the level of this field. The life extension technology mainly relies on the life extension device composed of a life extension switch and a fuse. When the battery is activated, the life extension switch is controlled to close. The fuse is connected in parallel between the positive and negative poles of the battery pack, so that the battery pack can quickly meet the use requirements, thereby prolonging the dry storage life of the battery pack. Using this device can extend the dry storage lif...
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Inventor王冠赵保国吕士银倪作恒马军高俊丽
OwnerSHANGHAI INST OF SPACE POWER SOURCES