7results about How to "Improve performance drop" patented technology

The utility model discloses a cover plate, shell component and battery, the cover plate comprises a cover plate body and a limit piece arranged on the cover plate body, the cover plate body is used for being matched with a shell so as to seal a roll core in the shell; the limiting piece abuts against the roll core, a first insulating layer is arranged on the limiting piece, and the first insulating layer is located between the limiting piece and the roll core. According to the utility model, the limiting piece is arranged on the cover plate body, the limiting piece is propped against the roll core during application, the roll core is fixed between the cover plate body and the shell, and the roll core is prevented from shaking in the shell, so that the vibration and falling performance of the battery core is improved, and the service life of the battery is prolonged. Meanwhile, due to the arrangement of the limiting piece, a gap exists between the roll core and the cover plate body, and when the shell and the cover plate body are welded and sealed, the influence of high temperature generated by welding on the roll core can be reduced. Moreover, the first insulating layer is arranged between the limiting piece and the roll core, so that the limiting piece can be prevented from being electrically connected with the roll core, and short circuit of the battery is avoided.

The invention relates to the technical field of breast pumps, in particular to a breast pump. Comprising a vacuum pump for controllably outputting negative pressure; each milk sucking cup is connected with the vacuum pump through a two-way regulating valve; the pressure relief regulating valve is arranged in the main pipeline and is used for balancing the negative pressure in the whole gas path; and the control unit is connected with the two-way regulating valve and the pressure relief regulating valve and is used for generating suction curves of the milk sucking cups and outputting suction control signals which correspond to the suction curves and are used for respectively controlling the opening degrees of the two-way regulating valve and the pressure relief regulating valve. By arranging the adjusting valve and accurately controlling the opening degree of the adjusting valve, the single vacuum pump can control the suction force of different gears of the milk sucking cups on the multiple sides, the comfort and naturalness of the sucking process are improved, the whole machine is stable and controllable, and the problem that the performance is reduced due to the fact that the vacuum pump is frequently switched on and off and is prone to sparking is solved.

The utility model discloses gummed paper, a battery cell and a battery. The gummed paper comprises a bonding layer, bonding layers are arranged on the two opposite sides of the base material layer in the thickness direction of the base material layer; the expansion layer is configured to be capable of expanding at least in the thickness direction after absorbing the electrolyte; wherein the base material layer is provided with an expansion layer along at least one side of the width direction of the base material layer and / or along at least one side of the length direction of the base material layer. When the adhesive tape disclosed by the embodiment of the utility model is applied to the battery cell and the adhesive tape is adhered between the bare battery cell and the aluminum-plastic film, free electrolyte can be effectively absorbed, the appearance of the battery cell is improved, a gap between the bare battery cell and the aluminum-plastic film is filled, and the possibility that the bare battery cell moves relatively in the aluminum-plastic film is reduced.

The invention discloses a secondary battery and a power utilization device, the secondary battery comprises an electrode assembly, the electrode assembly comprises a first pole piece, a second pole piece and a first diaphragm, the first pole piece comprises a first tab, and the first tab is arranged on one side of the width direction of the first pole piece; the first diaphragm comprises a first bonding layer and a base film which are stacked; the first bonding layer comprises a first part and a second part which are sequentially arranged in the winding direction, and the first part is far away from the winding center compared with the second part; the first part comprises a first area and a second area, the second part comprises a third area and a fourth area which are sequentially arranged along the width direction of the first diaphragm, and the first area, the third area and the first tab are positioned on the same side of the width direction of the first diaphragm; the bonding strength between the first area and the first pole piece is F1, the bonding strength between the fourth area and the first pole piece is F4, and F1 / F4 is larger than or equal to 1.1. Therefore, the ending part of the first diaphragm on one side of the first tab is not easy to turn over due to falling.

The utility model discloses an internal series battery cell and an internal series battery, and relates to the technical field of series batteries. The inner-string battery cell comprises N bare battery cells and N-1 partition plates, and N is greater than or equal to 2; the naked battery cells and the partition plates are sequentially and alternately stacked, the adjacent naked battery cells and partition plates are connected through adhesive layers, and the two adjacent adhesive layers are distributed in a staggered manner. According to the inner-string battery cell, the adhesive layers are arranged between the adjacent naked battery cells and the partition plates for connection, so that the two adjacent naked battery cells are relatively fixed, the naked battery cells are prevented from sliding, the qualification rate of the packaged inner-string battery cell can be improved, and the falling performance can also be improved; meanwhile, the two adjacent adhesive layers are distributed in a staggered manner, and the thickness of only one adhesive layer needs to be calculated in thickness calculation, so that the thickness of the inner-string battery cell is reduced, the energy density is improved, the thickness difference of the inner-string battery cell is reduced, and the flatness is improved.

The invention provides a regenerated fiber material rope core steel wire rope for an elevator. The regenerated fiber material rope core steel wire rope comprises a composite rope core and steel wire strands arranged on the periphery of the composite rope core. The composite rope core comprises regenerated fiber filaments, secondary outer layer filaments and outer layer filaments, the secondary outer layer filaments spirally wrap and twist the regenerated fiber filaments, and the outer layer filaments spirally wrap and twist the secondary outer layer filaments. The steel wire strands comprise secondary outer-layer steel wire strands and outer-layer steel wire strands, the secondary outer-layer steel wire strands spirally wrap and entwist the composite rope core, and the outer-layer steel wire strands spirally wrap and entwist the secondary outer-layer steel wire strands; the regenerated fiber filaments are formed by twisting a plurality of regenerated fiber filaments, and the regenerated fiber filaments are made of modified regenerated high-density polyethylene and carbon fibers. The composite rope core comprises the regenerated fiber yarns, the secondary outer layer yarns and the outer layer yarns, the regenerated fiber yarns can improve toughness and tensile strength of the composite rope core, and the secondary outer layer yarns and the outer layer yarns provide good supporting performance and oil storage capacity and provide enough good lubrication support for steel wire strands of the steel wire rope, so that the overall comprehensive performance of the steel wire rope can be greatly improved.