The,distinction,between,nickel business, insurance The distinction between nickel hydride, nickel-cadmium batte
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Thedisadvantage of nickel-hydrogen battery is that the price are much expensivethan nickel-cadmium batteries, the performance is worse than lithium battery.Lithium ion battery is a kind of highenergy density batteries. Lithium ion battery also a intelligent battery, itcan be associated with special original intelligent charger, to achieve themost short charging time, maximum life cycle and the maximum capacity. Lithiumion battery performance is currently the best battery. With the same sizenickel-cadmium batteries, nickel-hydrogen batteries reserve maximum power, thelightest weight, the longest life expectancy, charging time is short, no memoryeffect. Rechargeable battery mainly have two kinds of lead-acid batteries andalkaline batteries. Currently used nickel-cadmium, nickel-metal hydride andlithium ion battery are alkaline battery. NiMH batterys positive platematerial is NiOOH, negative electrode materials is hydrogen storage alloy. Theelectrolyte is usually 30% KOH aqueous solution, and adding a little amount ofNiOH. Diaphragm using porous non-woven fabric or nylon nonwoven. NiMH batteryhas cylindrical and square two kinds.NiMH battery has better low-temperaturedischarge characteristics, even at -20ambient temperature, using a large current (1C discharge discharge rate ) dischange, the releaseof electricity can also reach the nominal capacity of more than 85%. However,NiMH battery at a high temperature ( 40),storage capacity will drop from 5 to 10%. This due to discharge ( the higherthe temperature, the greater the self-discharge rate ) caused the capacity lossis reversible, a few charge-discharge cycle can return to maximum capacity.NiMH battery open circuit voltage is 1.2V, the same with NiCd cells.The NiCd and NiMH battery charging processis very similar, were required constant current charging. The difference ismainly in the fast charge termination detection methods, in order to preventovercharge. Charger charging with constant current for battery, detect batteryvoltage and other parameters at the same time. When the battery voltage riseslowly to reach a peak, the NiMH battery fast charge termination, and NiCdbattery when the battery voltage drops first a - ³V is terminated when a rapid charging. To avoid damage to thebattery, while the battery temperature is too low it should not start charging,when the battery temperature below 10 ,should be transferred to a trickle charge mode. While the battery temperaturereaches the prescribed value, it must be immediately stop charging.According to metal powder supplier,negative plate active material is composed by cadmium oxide powder and ironoxide powder, the role of iron oxide powder is made the cadmium oxide powderwith higher diffusivity, prevent caking, and increased the capacity of plate. Nickelcadmium battery NiCd battery positive plate active material is made of oxidizednickel powder and graphitepowder, graphite is not participating in a chemical reaction, its main role isto enhance the conductivity. Active substances are wrapped in a perforated, aftercompression molding is formed the battery positive / negative plate. Plate byalkali-resistant rubber insulated stick or perforated PVC corrugated board. Theelectrolyte is usually in potassium hydroxide solution. Compared with otherbattery, NiCd battery self-discharge rate ( i.e. the battery when not in usewithout charge rate ) is moderated. NiCd battery during use, if the dischargeis not completely and charge again, next time when discharging will not releaseall energy. For example, released 80% electricity then fully charged, thebattery can only emit 80%. This is the so-called memory effect. Of course,several full charge / discharge cycle will make NiCd cells recovered to normal.Because of NiCd battery memory effect, if not fully discharged, should be incharge before each battery discharge to 1V below.Source:http://www.mhcmp.com
The,distinction,between,nickel