Proceedings Of The Symposium On Lithium Polymer
The bipolar electrodes utilize a steady substrate 34 on which is deposited a lithium ion materials 36. The substrate for the lithium cathode is usually a materials that is secure in the environment of lithium ion cells having a thickness of less than 100 mils. A broad variety of thin movie plastic substrates may be utilized, corresponding to polyvinylidene difluoride . The polymer membrane or separators 32 likewise may be all kinds of skinny film plastic supplies having a thickness of less than 100 mils. The cell sleeve 12 has an finish 21 near the anode terminal 60 and an end 23 near cathode terminal 44.
Then the cathode cell terminal forty four could also be pivoted as shown in FIG. The anodes of the bipolar stack, as shown in FIGS. 5 and seven, could also be then ultrasonically welded to the anode cell terminal 60. The anode cell terminal 60 has a lip portion 70 as finest shown in FIGS. The anode cell terminal 60 could then be pivoted onto the top of the cell sleeve 21 as shown in FIG.
The electrode stack 40 is comprised of bipolar electrodes 36 with lithium ion permeable polymer membrane 32 between the totally different cells. Optionally the membrane 32 isn't lithium permeable. While all kinds of supplies can be utilized for the bipolar cells and the polymer membrane, one kind of cathode might be a lithium steel oxide similar to lithium manganese oxide or lithium cobalt oxide. The anode may be a carbon plastic movie with a copper current collector.
A seal 86 is current on the sleeve to electrolytically insulate the sleeve from the battery stack 40. The extensions 22 for the cathode plastic insert and 17 for the anode plastic insert fit within the inside 20 of the sleeve 12. The extensions are generally made from a stable plastic materials, particularly one that is stable throughout the environment of the lithium ion batteries. It is comprised of a material that's resistant to electrolyte similar to a polypropylene and the like. After the cathodes of the bipolar electrode stack 40 are ultrasonically welded to the cathode terminal 44, the cell sleeve 12 may be slid over the stack.
eleven-14, and its extension 22 matches snugly inside the cell sleeve 12. 11-14, the sleeve extension 22 electrically insulates the cathode 44 from the cell housing 12.
The lithium ion battery takes on the looks of a cell can as proven in FIG. It is then prepared for crimping to secure the bipolar stack throughout the sleeve as shown in FIGS. The cell terminals are crimped concerning the cell sleeve in 4 phases as shown schematically in FIGS. Clearly the same is relevant on the anode aspect as properly.
A broad number of rechargeable lithium batteries could also be utilized, such as these disclosed in Chapter 36 within the Handbook of Batteries, supra, U.S. The current utility pertains to rechargeable lithium ion batteries, and in particular, to a compact lithium ion battery module using bipolar electrodes. We produce the high C-fee lifepo4 lithium rechargeable battery for R/C Model, power battery for electric bike & bike and vitality storage battery. For the most part, these simple strategies can greatly enhance the lifespan of your battery, and are simple to implement. Avoid supercharging your electrical automobile until essential.
The use of the terminology “sleeve” is appropriate for the housing. It connotes an oblong open construction in which the battery stack is positioned. DESCRIPTION OF PREFERRED EMBODIMENTS The current invention pertains to lithium ion batteries that are prepared into compact, bipolar cell arrangements. While bipolar cells are demonstrated in the current invention, monopolar cells might likewise be utilized.
LiPo batteries are charged utilizing a constant current/constant voltage (CC/CV) technique. The charging present stays fixed until the battery reaches its peak voltage, the voltage is then held fixed whereas the current is lowered. NiMH batteries are charged utilizing a pulsed charging technique. Charging a LiPo battery this manner can have damaging results that can result in fire and explosion. To additional insulate the battery parts, the lithium ion battery could also be wrapped with a cell wrap 84 which is a plastic material as polyethylene or polypropylene as proven in FIGS.