CN200950546Y

CN200950546Y - Emergent charger for lithium battery

Info

Publication number: CN200950546Y
Application number: CN 200620010215
Authority: CN
Inventors: 吕永裕
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-26
Filing date: 2006-09-26
Publication date: 2007-09-19
Anticipated expiration: 2016-09-26

Abstract

The utility model is an emergency charger for Li-ion battery which relates to a device used to charge Li-ion battery temporarily when going out. The utility model solves the problem of low efficiency and reliability in Li-ion battery charger. The Li-ion battery emergency charger is provided with a hand generator and an AC/DC converting and stabilizing circuit which comprises a full-wave rectifier connected between the input end of the hand rectifier and a stabilizer connected in series by a plurality of diodes in forward direction and connected between the output end of the full-wave rectifier. The input end of the AC/DC converting and stabilizing circuit is connected with an input power source socket and a 2-core feeder line, wherein, one end is inserted with the plug of the output power socket while the other end is inserted with the plug of the input power socket of the electric devices with Li-ion battery. The utility model can increase the efficiency of rectification using the full-wave rectifier and also can guarantee the reliability of charging Li-ion battery using the stabilizer connected in series by a plurality of diodes in forward direction.

Description

The lithium battery charger for emergency

Technical field

The utility model relates to a kind of device that charges the battery, particularly be a kind of that carry when being convenient to go out, in the place that does not have AC power, give the device of lithium cell charging temporarily.

Background technology

The people that often go out nearly all will use mobile communication telephone bandset, camera, video camera and laptop computer, and these equipment nearly all are to use lithium battery power supply.Mostly existing lithium battery charging device is to utilize AC power, through being transformed to direct current by rectifier after the transformer step-down, passes through a voltage stabilizing circuit again to lithium cell charging.The migrant person carries this lithium battery charging device, just can use AC power to lithium cell charging in the hotel, so that mobile communication telephone bandset, camera, video camera and laptop computer can operate as normal.But do not have the place of AC power in train, long-distance bus even open air etc., in case the electric energy of lithium battery exhausts, mobile phone, camera, video camera or laptop computer just can not use.For this reason, the someone proposes to address this problem with the technical scheme of AC power and hand power combination.It is ZL 200420076894.4 that China utility model patent specification CN 2741204Y discloses the patent No., name is called the technical scheme of " the dual-purpose battery charger of AC power and hand generator ", the housing that proposes this charger is provided with cradle, AC/DC conversion decompression voltage regulator and hand generator and the AC/DC conversion voltage stabilizing circuit thereof of laying lithium battery, the AC power input is converted to low-voltage DC through AC/DC conversion decompression voltage regulator, and being connected to cradle is lithium cell charging; The low-voltage AC of hand generator output is converted to low-voltage DC through AC/DC conversion voltage stabilizing circuit, and being connected to cradle is lithium cell charging.The AC/DC conversion voltage stabilizing circuit of above-mentioned connection hand generator comprises that mainly a rectifier diode makes halfwave rectifier to the low-voltage AC of hand generator output, the Rectified alternating current of a filter capacitor after to halfwave rectifier carries out filtering, a voltage-reg-ulator tube connects direct current input emitter with its collector electrode of common base mode work and connects direct current output, a voltage stabilizing didoe is provided with base reference voltage for this voltage-reg-ulator tube, a shunt resistance is connected between the collector electrode and base stage of this voltage-reg-ulator tube.When not having AC power, to lithium cell charging, conveniently travel and use outside by artificial rotation hand generator.But it also has following shortcoming: because the low-voltage AC of hand generator output has only been carried out halfwave rectifier, the low-voltage AC utilance is low; When artificial high speed rotating hand generator, the low-voltage AC of hand generator output can produce the phenomenon of overtension, might damage voltage-reg-ulator tube.

The utility model content

The utility model aims to provide the lithium battery charger for emergency of a kind of efficient height and reliable operation.

The technical solution of the utility model is: lithium battery charger for emergency, housing are provided with hand generator and AC/DC conversion voltage stabilizing circuit thereof; Its AC/DC conversion voltage stabilizing circuit comprises and is connected the full-wave rectifier between the hand generator output and is connected the pressurizer that is in series by a plurality of diode forward between the full-wave rectifier output; The output of AC/DC conversion voltage stabilizing circuit connects the out-put supply socket that is located on the housing respectively; , two core feeder lines, one end are provided with the plug of the above-mentioned out-put supply socket of pegging graft, and the other end is provided with the plug of the input supply socket of the lithium battery to be charged place electrical equipment of pegging graft.Because lithium battery to be charged place electrical equipment such as mobile communication telephone bandset, camera, video camera and laptop computer inside all are provided with the lithium cell charging control circuit, as long as insert corresponding voltage on two terminals of its input supply socket, this lithium cell charging control circuit just can charge to its lithium battery to be charged with specified voltage and current.Feeder line is connected between the input supply socket of the out-put supply socket of this charger and lithium battery to be charged place electrical equipment, rotate the hand power cleaner handgrip, it is that direct current offers lithium battery to be charged place electrical equipment that the low-voltage AC of hand generator output is carried out full-wave rectification by full-wave rectifier.When the velocity of rotation of hand generator was slow, the low-voltage alternating-current piezoelectric voltage of its output was low, and the range of voltage values that the direct voltage of supplying with lithium battery to be charged place electrical equipment is lower than regulation then lithium cell charging control circuit is failure to actuate; When the velocity of rotation of hand generator is in suitable scope, the low-voltage alternating-current piezoelectric voltage of its output is moderate, supply with the direct voltage of lithium battery to be charged place electrical equipment range of voltage values up to specification then the lithium cell charging control circuit to lithium cell charging to be charged; When the velocity of rotation of hand generator is very fast, the low-voltage alternating-current piezoelectric voltage of its output is higher, the direct voltage of supplying with lithium battery to be charged place electrical equipment is higher than the pressurizer conducting that the range of voltage values of regulation then is in series by a plurality of diode forward, the one part of current of releasing makes the dc voltage stability of supplying with lithium battery to be charged place electrical equipment in the range of voltage values that the voltage stabilizing value of this pressurizer is promptly stipulated, the lithium cell charging control circuit is normally to lithium cell charging to be charged.The efficient of full-wave rectification is higher than halfwave rectifier.The velocity of rotation that please notes hand generator is subjected to artificial hand restriction, can not be unrestrictedly fast, therefore suitably select the rated current numerical value of each diode of formation pressurizer, the superfluous electric current of just releasing fully guarantees the ground work of the normal reliable of this pressurizer own; And the voltage stabilizing value of pressurizer is each diode positive pressure drop sum, is reliable and stable; So the utility model energy normal reliable ground is to lithium cell charging to be charged.

The voltage stabilizing value of pressurizer can be adjusted by the number that changes diode: the product of the positive pressure drop 0.7V of the number of diode and diode is the voltage stabilizing value of this pressurizer in the pressurizer of described AC/DC conversion voltage stabilizing circuit.

In a preferred embodiment: master section is a threephase alternator in the described hand generator; Full-wave rectifier is made up of three groups of diode rectifiers in its AC/DC conversion voltage stabilizing circuit; Every group of diode rectifier has two diodes, wherein the negative pole of a diode connects the positive output end of full-wave rectifier and an anodal phase line that connects generator, and the positive pole of another diode connects the negative output terminal of full-wave rectifier and negative pole connects same phase line of generator.Machine-the electric energy conversion of threephase alternator is higher than diphaser, and the full-wave rectifier output voltage pulsation of three groups of diode rectifier compositions is little.

Particularly threephase alternator adopts unsymmetric structure, can reduce the resistance that poles attract produces, increase electric energy output: described threephase alternator stator is provided with equally distributed 9 induction coils, and 3 induction coils of two induction coils in every interval are connected into a phase induction coil in proper order; Rotor magnetic steel is provided with equally distributed 4 pairs of magnetic poles.

And then utilize the speedup travelling gear to increase generator speed: to be provided with two-stage speedup travelling gear in the described hand generator between arm pivot post and the alternator shaft.

The utility model lithium battery charger for emergency utilizes full-wave rectifier to increase the efficient of rectification, utilizes the pressurizer that is in series by a plurality of diode forward to guarantee reliability to lithium cell charging to be charged again.The own power consumption of pressurizer that is in series by a plurality of diode forward is little, cost is cheap especially, particularly can adjust the voltage stabilizing value of pressurizer by the number that changes diode, manufacturer only need make the simple needs that just can satisfy the different size lithium cell charging of adjusting, and helps reducing cost.The full-wave rectifier that adopts threephase alternator and forms by three groups of diode rectifiers, machine-electric energy conversion rate height not only, output voltage is pulsed little; And can save filter capacitor, reduce cost.Adopt the threephase alternator of unsymmetric structure, can reduce artificial hand resistance, utilize the speedup travelling gear to increase generator speed again, increase electric energy output.

Description of drawings

Fig. 1 is the electrical block diagram of an embodiment of the utility model lithium battery charger for emergency.

Fig. 2 is the deployed configuration schematic diagram of Fig. 1 embodiment.

Fig. 3 is the cross-sectional view of Fig. 1 embodiment.

Fig. 4 is the perspective view of Fig. 1 embodiment.

Embodiment

Embodiment of the utility model lithium battery charger for emergency designs by the lithium cell charging to mobile communication telephone bandset 3.7V, and its circuit structure as shown in Figure 1.This lithium battery charger for emergency comprises hand generator 5 and the AC/DC conversion voltage stabilizing circuit 7 and removable two core feeder lines 8 that are connected that is located on the housing.AC/DC conversion voltage stabilizing circuit 7 comprises and is connected the full-wave rectifier 72 between hand generator 5 outputs and is connected pressurizer 73 between full-wave rectifier 72 outputs.The output of AC/DC conversion voltage stabilizing circuit 7 connects the out-put supply socket 71 that is located on the housing respectively.One end of two core feeder lines 8 is provided with the plug 81 of the above-mentioned out-put supply socket 71 of pegging graft, and the other end is provided with the plug 82 of the input supply socket of the lithium battery to be charged place electrical equipment of pegging graft.

Master section 51 is the threephase alternator of unsymmetric structure in the hand generator 5; The stator 513 of this threephase alternator is provided with equally distributed 9 induction coils, and 3 induction coils of two induction coils in every interval are connected into a phase induction coil in proper order; Rotor magnetic steel 511 is provided with equally distributed 4 pairs of magnetic poles.

Full-wave rectifier 72 is made up of three groups of diode rectifiers in the AC/DC conversion voltage stabilizing circuit 7; First group of diode rectifier has two diode D1, D2, wherein the negative pole of diode D1 connects the positive output end of full-wave rectifier 72+and anodal article one phase line that connects generator 5, and the positive pole of diode D2 connects that the negative output terminal of full-wave rectifier 72-and negative pole connects article one phase line of generator 5.Second group of diode rectifier has two diode D3, D4, wherein the negative pole of diode D3 connects the positive output end of full-wave rectifier 72+and anodal second phase line that connects generator 5, and the positive pole of another diode D4 connects that the negative output terminal of full-wave rectifier 72-and negative pole connects the second phase line of generator 5.The 3rd group of diode rectifier has two diode D5, D6, wherein the negative pole of diode D5 connects the positive output end of full-wave rectifier 72+and anodal the 3rd phase line that connects generator 5, and the positive pole of diode D6 connects that the negative output terminal of full-wave rectifier 72-and negative pole connects the 3rd phase line of generator 5.

Pressurizer 73 is in series by 6 diode D7-D12 forwards, and the voltage stabilizing value of this pressurizer 73 is the number (6) of diode in this pressurizer 73 and the product of the positive pressure drop 0.7V of diode, i.e. 4.2V.

The mechanical structure of present embodiment is as Fig. 2-shown in Figure 4.

Please see Figure 2, bottom 1 and end cap 2 that housing is made by plastics are formed.

Bottom 1 is bathtub shape, and the upper end is opened wide.The rear wall of bottom 1 has a gap 12, and a jack 11 is reserved in the below of gap 12.The circuit board of AC/DC conversion voltage stabilizing circuit 7 is fixed on close gap 12 places in the bottom 1, and the out-put supply socket 71 that is fixed on this circuit board lower surface faces jack 11.So, the plug 81 of two core feeder lines 8 can pass jack 11 and is plugged on the out-put supply socket 71.Be provided with the joint pin 13 that three roots and tops have screw in the bottom 1, be used for fixing end cap 2; Wherein two joint pins stood in the both sides of gap 12 in 13 minutes, and a joint pin 13 is located at and faces gap 12 on the front side wall.Respectively establish a support column 14, be used to support generator 5 for four jiaos in the bottom 1.

The main body of end cap 2 is for hiding the flat board of bottom 1 upper end open; The gap 12 of the corresponding bottom 1 of this dull and stereotyped rear side is provided with a retaining groove that concaves 21, is used to hold the crank 41 of hand generator 5; Leave a big hole 22 on this flat board and be three via holes 23 that isosceles triangle distributes, big hole 22 is used for holding the handle terminal pad 3 of hand generator 5, three joint pins 13 in three via holes, the 23 respectively corresponding bottoms 1 pass wherein for screw, and end cap 2 is fixed on the bottom 1.

Handle terminal pad 3 and handle 4 belong to the peripheral component of hand generator 5.The upper surface of handle terminal pad 3 has a boss, and the central authorities of this boss leave the straight trough 31 of one installation handle 4.The bottom surface of straight trough 31 is positioned at handle terminal pad 3 circle centre positions and makes screw tail via hole 32, and a pair of axis hole 33 is left in the two side of straight trough 31.Handle 4 is plastic plates of a block length bar shaped, and its width is slightly less than straight trough 31 width of handle terminal pad 3; Its thickness is roughly suitable with straight trough 31 degree of depth.The upper surface of handle 4 one ends is provided with crank 41, and the other end is provided with an axis hole 42 and runs through two side surfaces.Be placed on handle 4 in the straight trough 31 of handle terminal pad 3 with the downward state of upper surface, the axis hole 42 of handle 4 is alignd with a pair of axis hole 33 of handle terminal pad 3, minor axis 34 is penetrated wherein, handle 4 just has been installed on the handle terminal pad 3, and this back handle 4 straight trough 31 of handle terminal pad 3 relatively ploughs under or routs up.Please referring to Fig. 3, the lower surface of handle terminal pad 3 is recessed plate-like, and central authorities are the ring platform 35 of lower convexity.Ring platform 35 endoporus are one six side's blind holes, and it and screw tail via hole 32 form shoulder hole.

Please in conjunction with Fig. 2 referring to Fig. 3, each basic part of hand generator 5 is installed on the iron base plate 50 of a rectangle.A card base groove 501 is respectively left near the rear and front end in the left and right sides of base plate 50, and a location notch 502 is respectively left near two ends, the left and right sides in the both sides, front and back of base plate 50, and each card base groove 501 and location notch 502 are used for mounting cup box 6.The middle part of base plate 50 takes over and has the copper bearing 503 that a circular hole fixed installation is extended downwards, is used to install master section 51.Four jiaos of base plate 50 respectively have a via hole 504.

The rotor magnetic steel 511 of master section 51 is fixed together with the lower end of alternator shaft 512, and the middle and lower part of alternator shaft 512 is inserted in the centre bore of copper bearing 503; The upper end of alternator shaft 512 is stretched out the upper surface of copper bearing 503 and base plate 50 pinion 52 has been installed.The stator 513 of master section 51 is fixed on the lower, outer perimeter of copper bearing 503, and is being contained by rotor magnetic steel 511.

Take back and be provided with the power transmission shaft 53 that a bearing pedestal installation is upwards extended in the rear portion of base plate 50.A medium sized gear 54 has been installed in the bottom of power transmission shaft 53, and this gear 54 is meshed with pinion 52; A pinion 55 has been installed on the top of power transmission shaft 53.The anterior centering position of base plate 50 is provided with bearing pedestal the main shaft 56 of upwards extending is installed, and a gear wheel 57 has been installed on the top of main shaft 56, and gear wheel 57 is meshed these four gears formation two-stage speedup drive gear mechanisms with pinion 55 on the power transmission shaft 53.The upper surface of gear wheel 57 has one along the upwardly extending cylindrical shaft shoulder 571 of axis, and the upper surface of the shaft shoulder 571 is provided with one along the upwardly extending hexagonal prism 572 of axis, and the upper surface of this hexagonal prism 572 is provided with a screw 573.

The lower surface of base plate 50 has been installed a terminal block 58, the three-phase induction lead-out wires of coil of generator unit stator 513 is welded on respectively on each binding post of terminal block 58, and is connected respectively on the circuit board of AC/DC conversion voltage stabilizing circuit 7 by the connecting line that each binding post of terminal block 58 is drawn.

Base plate 50 is provided with the rectangular plastic cover box 6 of a bottom opening.The hexagonal prism 572 of the corresponding gear wheel 57 of cover box 6 roofs has a circular hole 61, therefrom passes for hexagonal prism 572.Cover box 6 left and right sides walls are respectively left a card base 62 near each card base groove 501 of the corresponding base plate 50 in rear and front end, and inboard each location notch 502 near the corresponding base plate 50 in two ends, the left and right sides in the two side, front and back of cover box 6 is respectively established a positioning convex point.The corresponding power transmission shaft 53 of cover box 6 roof inner surfaces is provided with the boss 63 of a ring-type, and the interior blind hole diameter of boss 63 is corresponding with the diameter of power transmission shaft 53; The shaft shoulder 571 of the corresponding gear wheel 57 of cover box 6 roof inner surfaces is provided with the boss 64 of a ring-type, major part of the endoporus of boss 64 and aforementioned circular hole 61 formations under shoulder hole; The diameter of bore of boss 64 is corresponding with the diameter of the shaft shoulder 571.

Base plate 50 and cover box 6 are assembled into a time-out, and the circular hole 61 that will cover box 6 roofs is earlier aimed at the hexagonal prism 572 of gear wheel 57, and hexagonal prism 572 is passed from circular hole 61.Each card base 62 of cover box 6 left and right sides walls inserts each corresponding card base groove 501 of base plate 50, and each positioning convex point of the inboard, two side, front and back of cover box 6 leans each corresponding location notch 502 of nearly base plate 50 respectively; Push cover box 6 downwards, make each card base 62 hook the lower surface of base plate 50, cover box 6 is fastened on the base plate 50.The interior blind hole of cover box 6 roof inner surface boss 63 is inserted on the top of power transmission shaft 53; The shaft shoulder 571 of gear wheel 57 inserts the endoporus of cover box 6 roof inner surface boss 64.

Base plate 50 after the assembling and cover box 6 are put in the bottom 1 together, and the salient point on four support column 14 tops of bottom 1 snaps in the via hole 504 of 50 4 jiaos of correspondences of base plate.Flat board with end cap 2 hides bottom 1 upper end open again, and retaining groove 21 hides the gap 12 of bottom 1; Pass three via holes 23 on the flat board with screw respectively, and screw is locked at respectively on the joint pin 13 corresponding in the bottom 1, end cap 2 is fixed on the bottom 1.Handle terminal pad 3 is placed in the big hole 22 of end cap 2, make the hexagonal prism 572 of gear wheel 57 snap in six side's blind holes of handle terminal pad 3 lower surfaces, lock the hexagonal prism 572 upper surface screws 573 of gear wheel 57 at the screw tail via hole 32 of screw being put into handle terminal pad 3 circle centre positions, handle terminal pad 3 is fixedlyed connected with gear wheel 57.So far finish the mechanical structure assembling task of present embodiment.

Please see Figure the stereogram of the present embodiment shown in 4, when handle reverse 4 was received in it in the straight trough 31 of handle terminal pad 3, crank 41 was contained in the retaining groove 21 of end cap 2.

During use, the plug 81 of feeder line 8 one ends is connected in the out-put supply socket 71 of this charger, the plug 82 of the other end is connected in the input supply socket of lithium battery to be charged place electrical equipment.Handle 4 routed up along the straight trough 31 of handle terminal pad 3 launch.One holds bottom 1, and another holds crank 41.Turning handle 4, it is that direct current offers lithium battery to be charged place electrical equipment that the low-voltage AC of hand generator 5 outputs is carried out full-wave rectification by full-wave rectifier 72.When the velocity of rotation of hand generator 5 was slow, the low-voltage alternating-current piezoelectric voltage of its output was low, the direct voltage of supplying with lithium battery to be charged place electrical equipment be lower than 3.7V then the lithium cell charging control circuit be failure to actuate; When the velocity of rotation of hand generator 5 is in suitable scope, the low-voltage alternating-current piezoelectric voltage of its output is moderate, supply with the direct voltage of lithium battery to be charged place electrical equipment 3.7V-4.2V range of voltage values up to specification then the lithium cell charging control circuit to lithium cell charging to be charged; When the velocity of rotation of hand generator 5 is very fast, the low-voltage alternating-current piezoelectric voltage of its output is higher, the direct voltage of supplying with lithium battery to be charged place electrical equipment is higher than pressurizer 73 conductings that 4.2V then is in series by six diode forward, the one part of current of releasing makes the dc voltage stability of supplying with lithium battery to be charged place electrical equipment at 4.2V, and the lithium cell charging control circuit is normally to lithium cell charging to be charged.Because the velocity of rotation of hand generator 5 is subjected to artificial hand restriction, can not be unrestrictedly fast, generally selecting rated current numerical value is the diode formation pressurizer 73 of 1A, and the superfluous electric current of just releasing fully guarantees that present embodiment energy normal reliable ground is to lithium cell charging to be charged.

For the ordinary people, the time of artificial hand power generally is difficult to surpass half an hour, although deficiency is so that lithium battery is full of electricity fully, thisly should can satisfy people use the mobile communication telephone bandset for a long time in the occasion of no alternating current requirement fully acutely to lithium cell charging.

As everyone knows, the alternating voltage of hand generator 5 outputs is relevant with load variations with electric current.But change the number of turn or rotor magnetic steel 511 magnetic field intensitys of the three-phase induction coil of generator unit stator 513, can change the alternating voltage of hand generator 5 outputs.Change the line footpath of the three-phase induction coil of generator unit stator 513, can change the alternating current of hand generator 5 outputs.Owing to can adjust the voltage stabilizing value of pressurizer 73 by the number that changes diode, therefore by the technical solution of the utility model, can also design the lithium cell charging of the lithium battery charger for emergency embodiment of different voltage and currents to camera, video camera and laptop computer.Just do not given unnecessary details at this.

The above only is the utility model preferred embodiment, does not limit the scope that the utility model is implemented with this, and the equivalence of doing according to the technical solution of the utility model and description changes and modification, all should belong to the scope that the utility model is contained.

Claims

1. lithium battery charger for emergency, housing is provided with hand generator and AC/DC conversion voltage stabilizing circuit thereof; It is characterized in that: its AC/DC conversion voltage stabilizing circuit comprises and is connected the full-wave rectifier between the hand generator output and is connected the pressurizer that is in series by a plurality of diode forward between the full-wave rectifier output; The output of AC/DC conversion voltage stabilizing circuit connects the out-put supply socket that is located on the housing respectively; , two core feeder lines, one end are provided with the plug of the above-mentioned out-put supply socket of pegging graft, and the other end is provided with the plug of the input supply socket of the lithium battery to be charged place electrical equipment of pegging graft.

2. lithium battery charger for emergency according to claim 1 is characterized in that: the product of the positive pressure drop 0.7V of the number of diode and diode is the voltage stabilizing value of this pressurizer in the pressurizer of described AC/DC conversion voltage stabilizing circuit.

3. lithium battery charger for emergency according to claim 2 is characterized in that: master section is a threephase alternator in the described hand generator; Full-wave rectifier is made up of three groups of diode rectifiers in its AC/DC conversion voltage stabilizing circuit; Every group of diode rectifier has two diodes, wherein the negative pole of a diode connects the positive output end of full-wave rectifier and an anodal phase line that connects generator, and the positive pole of another diode connects the negative output terminal of full-wave rectifier and negative pole connects same phase line of generator.

4. lithium battery charger for emergency according to claim 3 is characterized in that: described threephase alternator stator is provided with equally distributed 9 induction coils, and 3 induction coils of two induction coils in every interval are connected into a phase induction coil in proper order; Rotor magnetic steel is provided with equally distributed 4 pairs of magnetic poles.

5. according to claim 1 or 2 or 3 or 4 described lithium battery charger for emergency, it is characterized in that: be provided with two-stage speedup travelling gear in the described hand generator between arm pivot post and the alternator shaft.