CN103587483A - Charging device and charging method of vehicle-mounted navigator - Google Patents
Charging device and charging method of vehicle-mounted navigator Download PDFInfo
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- CN103587483A CN103587483A CN201310576295.2A CN201310576295A CN103587483A CN 103587483 A CN103587483 A CN 103587483A CN 201310576295 A CN201310576295 A CN 201310576295A CN 103587483 A CN103587483 A CN 103587483A
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Abstract
The invention discloses a charging device of a vehicle-mounted navigator. The charging device of the vehicle-mounted navigator comprises a plurality of buckles, a body, a first photovoltaic panel, a second photovoltaic panel and a first USB interface. An original rearview mirror is arranged between the charging device and the vehicle-mounted navigator. The buckles are arranged on the rear portion of the body and are matched with hooks on the rear portion of the vehicle-mounted navigator, so that the original rearview mirror is fixed between the charging device and the vehicle-mounted navigator. The first photovoltaic panel and the second photovoltaic panel are both in a foldable type and are arranged on the two sides of a fixed crank and a ball journal of the original rearview mirror respectively, the first photovoltaic panel and the second photovoltaic panel are in an L shape, and the first photovoltaic panel and the second photovoltaic panel are fixed on the body in a pivoted connection mode and can be unfolded to work in a rotating mode and can be packed up to be stored in a folding mode. The first USB interface is arranged on the body and is connected with a second USB interface arranged on the vehicle-mounted navigator through a USB connecting wire. The charging device of the vehicle-mounted navigator solves the technical problems of power line wiring and inconvenient mounting in the power supply process of an existing vehicle-mounted satellite navigation terminal.
Description
Technical field
The invention belongs to satellite navigation and technical field of solar, more specifically, relate to a kind of charging unit and charging method of automatic navigator.
Background technology
In common sucked type vehicle mounted portable navigational aid (Portable Navigation Device is called for short PND), and in the vehicular rear mirror navigational aid occurring in recent years, generally by several main portions, form, as shown in Figure 1, comprise liquid crystal display and touch-screen 1, mainboard 2, many group screened housings 3, receiving wire 4, USB interface 5, SD card 6, loudspeaker 7, battery and battery case 8, audio-video interface 9 etc.In order to be easily installed on car, use; generally also can dispose protecting sleeve, onboard charger, vehicle mounted guidance tool holder, transmission line and adaptor union, power supply adaptor etc.; back mirror navigational aid also has back splint etc., is used for the fixing correct position onboard of navigational aid to watch for chaufeur.
Common sucked type vehicle mounted portable navigational aid is adsorbed on windshield, from car, can know and see, during parking, as forgotten, packs up, and easily by the broken window of burglar, is stolen.If but often pack up, while using, reinstall again, and may cause power shortage to need charging because of long-time placement.Although but onboard charger can meet charging requirement, power circuit to PND place, not only affects beautiful and cleanly via Cigarette lighter socket cabling, also likely affects automobile and controls, and badly influences user's experience.In addition, sucked type vehicle mounted portable navigational aid is the rapid rising temperature of meeting after solar radiation, easily affect the service life of battery and complete machine, and sucker structure easily comes off and damages.
The problems referred to above that exist for common sucked type vehicle mounted portable navigational aid, people have proposed a kind of vehicular rear mirror navigational aid, and it has had significantly and has improved than common sucked type navigational aid aspect antitheft, sun-proof, against shock.Vehicular rear mirror navigational aid has two kinds fixed form is installed, a kind of is that mode by back splint is arranged on automobile rearview mirror, location comparison is hidden, after car owner's parking is left, other people can't find the existence of navigational aid from outside, can in quite large degree, avoid stolen danger, cabling is installed as shown in Figure 2, wherein original-pack back mirror 201 is arranged on front windshield 202 middle upper parts, rearview mirror navigator 203 can be affiliated to and be arranged on 201, rearview mirror navigator vehicle power cable 204 need to be connected to onboard charger interface 205, to navigating instrument, powers.And because back mirror position is positioned at the roof on edge on front windshield or the sunshade coating scope of sheltering from heat or light, also can effectively stop solar radiation, not affected by extraneous temperature.
But the problem that existing vehicular rear mirror navigating instrument exists is to need professional installation personnel just can complete on the hidden ACC power supply that is connected to automobile of power lead, the cabling of satellite antenna and signal wire (SW) is installed, domestic consumer is not having manipulative ability or is starting in condition situation, after be difficult to buying, use voluntarily, or install voluntarily not in place and cause electric wire exposed, even destroy the problems such as former car seal ring.Another kind of mode is integral type back mirror navigational aid, need to will after original-pack room mirror dismounting, with this equipment, replace, therefore the installation of equipment need to be mated with former car with fixing, and line interface also needs to mate with former car, installs and generally also needs professional installation personnel just can start to carry out.The cabling of the power circuit of all things considered existing product and installation, relatively waste time and energy, and domestic consumer is more difficult starts to solve installation question voluntarily, thereby affected the ease for use of product, and and then can affect sales volume and the market of product.
Consider the universal and maturation of solar electrical energy generation in recent years, the present invention has designed that utilize can the folding solar photovoltaic panel method of supplying power to of carry on room mirror, to solve the powerup issue of vehicular rear mirror navigational aid and the problem that domestic consumer cannot install power circuit voluntarily.
Solar electrical energy generation is a new and high technology, and the production that the solar power of take is resource base will be a kind of sustainable development pattern.According to the difference of material therefor, solar cell can be divided into: silicon solar cell; Compound solar cell, as gallium arsenide, cadmium sulfide, CIS etc.; Solar cell prepared by functional high molecule material; Nano-crystalline solar battery etc.Thin-film solar cells is the current solar battery technology the most of future generation of rich future, and it has saved use and the silicon chip manufacturing process of silicon raw material.Compare with at present common silicon chip solar cell, silicon film solar batteries is only the former 1% left and right by silicon amount.In addition, this high-tech new product can, with building roof, materials for wall as glass curtain wall combines together, not only can generate electricity by way of merging two or more grid systems but also can save building materials, beautify the environment.
On Charge Management, due to automobile in motion, illumination condition changes greatly, the more general outdoor roof solar light intensity of illumination variation speed changes faster, as may be sailed dark basement garage etc. into from strong illumination, therefore the generation current of solar panel is very unstable, can be from tens uA to hundreds of mA saltus step, therefore conventional syllogic lithium cell charging management process be not suitable for vehicle-mounted charge occasion, and must fully take into account the impact of Exposure to Sunlight intensification equitemperature on lithium cell and generation current, therefore to the charging method under this application scenarios, need to do special design, to meet at solar panel in the lithium ion polymer battery process of charging in vehicular rear mirror navigational aid, ensure filling soon of lithium ion polymer battery, charge characteristic under the different condition such as trickle charge and trickle charge, and can make full use of the energy that photovoltaic sheet is changed.
Summary of the invention
Above defect or Improvement requirement for prior art, the invention provides a kind of charging unit and charging method of automatic navigator, its object is, solves the power lead cabling occurring in the power supply process of existing Vehicular satellite navigation terminal existence and inconvenient technical matters is installed.
For achieving the above object, according to one aspect of the present invention, a kind of charging unit of automatic navigator is provided, comprise a plurality of buckles, main body, the first photovoltaic panel, the second photovoltaic panel, and first USB interface, former car back mirror is arranged between charging unit and automatic navigator, buckle is arranged on the rear portion of main body, and coordinate with the snap fit at automatic navigator rear portion, so that former car back mirror is fixed between charging unit and automatic navigator, the first photovoltaic panel and the second photovoltaic panel are folding, and be arranged at respectively the both sides of fixed crank and the ball journal of former car back mirror, and be shaped as L shaped, the first photovoltaic panel and the second photovoltaic panel are pivotally connected mode and are fixed in main body, and rotatable organize work and folding packing up deposited, the first USB interface is arranged in main body, and be connected with the secondary USB interface being arranged on automatic navigator by USB connection lead, for the Charge Management unit charging in automatic navigator.
According to a further aspect in the invention, a kind of charging unit of automatic navigator is provided, comprise main body, photovoltaic panel, and USB interface pin, automatic navigator is the vehicular rear mirror navigating instrument of a kind of integrated former car back mirror and automatic navigator, main body is arranged on the rear portion of vehicular rear mirror navigating instrument, photovoltaic panel adopts inverted concave structure, and the mode that is pivotally connected is fixed in main body, photovoltaic panel gets around fixed crank and the ball journal of former car back mirror at depression position, rotatable organize work or folding packing up deposited, photovoltaic panel is connected with USB interface pin by connection lead, and be further connected with the Charge Management unit of vehicular rear mirror navigating instrument, for charging to vehicular rear mirror navigating instrument.
Preferably, Charge Management unit is arranged at the mainboard inside of vehicular rear mirror navigating instrument, and comprises current detection module, voltage detection module, charging chip, thermally dependent resistor, adjustable resistor, status indicator lamp, battery voltage detection module, super capacitor and lithium cell.
Preferably, current detection module is connected between the output pin and lithium cell of charging chip, voltage detection module is connected between USB interface pin and charging chip voltage input pin, thermally dependent resistor is connected between the discharge port negative pole of lithium cell and the hot feedback pin of charging chip, adjustable resistor is connected to charging chip and sets between pin and ground wire, status indicator lamp is connected between the LED lamp indication pin and ground wire of charging chip, battery voltage detection module is connected between the positive pole and ground wire of lithium cell, and super capacitor is in parallel with voltage detection module.
Preferably, current detection module is for detection of the electric current of charging chip mouth, detect after again with reference current comparison, and produce a feedback level to the control pin of charging chip, thereby control the electric current of charging chip voltage input pin, voltage detection module is for carrying out the digitized voltage value after AD conversion quantification are detected to the input voltage at charging chip voltage input pin place, charging chip is comprised of the integrated peripheral components of power transistor and small, dedicated micro controller system, be used for controlling charging sequential, thermally dependent resistor is for surveying the surface temperature of lithium cell, and result is fed back to charging chip with level value form, adjustable resistor is for setting the constant-current charge current value of lithium cell by regulating or preset resistance value.Status indicator lamp is comprised of LED lamp, and for sending different lighting effects in the different phase of charging, battery voltage detection module is to consist of AD converter, and for the voltage of lithium cell is carried out to real-time monitoring, super capacitor is for storing the energy of photovoltaic panel.
According to another aspect of the present invention, a kind of charging method of automatic navigator is provided, to be applied in the Charge Management unit of the mainboard inside that is arranged at vehicular rear mirror navigating instrument, Charge Management unit comprises current detection module, voltage detection module, charging chip, thermally dependent resistor, adjustable resistor, status indicator lamp, battery voltage detection module, super capacitor and lithium cell, and described method comprises the steps:
(1) thermally dependent resistor detects the temperature T of lithium cell, and detected value is fed back to charging chip, and charging chip judges whether this temperature is greater than threshold value T
offif be greater than threshold value T
offprocess of charging finishes, otherwise enters step (2);
(2) voltage detection module detects the voltage V at USB interface pin place
in, and judge V
inwhether be greater than initial low voltage detection threshold V
level-1if proceed to step (2), otherwise proceed to step (9);
(3) battery voltage detection module detects the actual value V of lithium cell terminal voltage
batwhether be less than the trickle charge predeterminated voltage value V of charging chip
tRIKLif be less than and enter step (4), otherwise enter step (5);
(4) start charging chip lithium cell is charged according to trickle pattern, and detect the terminal voltage V of lithium cell
batwhether lower than trickle charge predeterminated voltage value V
tRIKL, if it is maintain the circulation of current step, otherwise proceed to step (5);
(5) battery voltage detection module detects the terminal voltage V of lithium cell
bat, and judge terminal voltage V
batwhether higher than trickle charge predeterminated voltage value V
tRIKL, and have V
inhigher than V
level-and lower than V
level-, if yes then enter step (6).Otherwise enter step (7);
(6) charging chip starts constant voltage mode charging, and current detection module continues to monitor the charging current I of lithium cell and judges whether it is less than cutoff current I
offif, show also underfill of charging, maintain the circulation of current step, otherwise enter step (8);
(7) charging chip starts constant current mode charging, and battery voltage detection module continues to detect the terminal voltage V of lithium cell
bat, and judged whether V
batlower than V
level-, if it is maintain the circulation of current step, otherwise enter step (8);
(8) charging chip starts constant voltage mode charging again, and current detection module continues to monitor the charging current I of lithium cell and judges whether it is less than cutoff current I
off, show if not also underfill of charging, maintain the circulation of current step, otherwise enter step (9);
(9) disconnect the output of charging chip, finish current process of charging.
Preferably, in the process of circulation step (6), voltage detection module detects the voltage V at USB interface pin place
in, and judge V
inwhether be greater than V
level-2if, jump out this circulation, enter step (7).
In general, the above technical scheme of conceiving by the present invention compared with prior art, can obtain following beneficial effect:
1, this terminal has solved and after automobile, has filled market user and buy the problem that installation wiring is used voluntarily after vehicular rear mirror navigation product, and power lead need to be inserted in inconvenience and the aesthetic problem of bringing in vehicle-mounted cigarette lighter power supply for a long time: due to designed a kind of can carry the solar powered and charging unit of rotary folding type in Automobile inside rear-view mirror, the power circuit of back mirror satellite positioning navigation terminal is not to be directly connected on the ACC feed circuit of auto body, but powered at the solar panel at room mirror back by carry, can help vehicular rear mirror satellite positioning navigation terminal to utilize solar powered and charging, low-carbon energy-saving environmental protection, the electric power that all adopts solar power to provide under most service conditions, contribute to the power lead that solves above-mentioned existing product that a difficult problem is installed.
2, this terminal can be utilized solar power to greatest extent at finite space: owing to having adopted the rotary folding type solar panel of " L " shape, solar panels can launch at the narrow space at back mirror rear, thereby increase illuminating area, utilizes solar electrical energy generation to greatest extent.
3, this terminal is convenient coordinates installation with existing product: owing to having adopted flexibly buckle design as the mode that is fixedly connected with of navigation terminal, existing product as long as increase by two protruding set pins on shell, can be connected with solar panels, without too many change profile, also without the existing mould of upgrading repacking, save investment, and can form product introduction market by fast speed.
4, this terminal can adapt to different illumination conditions, and protects the service life of battery.
5, this method has increased a low charging valtage threshold value V
level-1, and its value is made as slightly higher than normal charge magnitude of voltage, only have output voltage when solar panels higher than V
level-1time just start process of charging, the weak current that so just can avoid the output of under weak illumination condition solar panels causes charging valtage to be dragged down and activating charge process can not really be charged repeatedly problem.
6, this method in the mouth parallel connection of solar panels a super capacitor as energy-storage travelling wave tube, even the low light level according to time can not start process of charging, also can pass through this super capacitor energy-storage, and level and smooth charging valtage.
7, this method has increased a high charge voltage threshold V
level-2, its value is slightly higher than conventional constant-current charge magnitude of voltage, like this can be under stable intense light irradiation condition, with pulsation-free voltage and larger charging current fast charge.
8, this method can guarantee that, under medium tenacity illumination condition, the output voltage of solar panels is at V
level-1and V
level-2between and cell pressure surpass trickle voltage threshold V
tRIKLtime, only in constant voltage mode, charge, and current constant mode charging that need not conventional syllogic, because now because input voltage is limited, is not enough to support large current charge, can avoid like this that current constant mode electric current is excessive causes charging valtage collapse.
Accompanying drawing explanation
Fig. 1 is existing portable navigation device structural representation.
Fig. 2 is that existing vehicular rear mirror navigating instrument circuit is installed cabling schematic diagram.
Fig. 3 A to 3C is according to the schematic diagram of the charging unit of the automatic navigator of first embodiment of the invention.
Fig. 4 A to 4C is according to the schematic diagram of the charging unit of the vehicular rear mirror navigating instrument of second embodiment of the invention.
Fig. 5 is according to the module diagram of the Charge Management unit of the vehicular rear mirror navigating instrument of second embodiment of the invention.
Fig. 6 is the diagram of circuit of the charging method of automatic navigator of the present invention.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition,, in each embodiment of described the present invention, involved technical characterictic just can not combine mutually as long as do not form each other conflict.
As shown in Figure 3 A and Figure 3 B, according to the charging unit 110 of the automatic navigator 11 of first embodiment of the invention, comprise a plurality of buckles 111, main body 112, the first photovoltaic panel 113, the second photovoltaic panel 114 and the first usb 1 15.In embodiment of the present invention, the quantity of buckle 111 is 4, it should be understood that the quantity of buckle 111 is never confined to this.
Former car back mirror 12 is arranged between charging unit 110 and automatic navigator 11.
The first photovoltaic panel 113 and the second photovoltaic panel 114 are folding, and are arranged at respectively the both sides of fixed crank 120 and the ball journal 121 of former car back mirror 12, and are shaped as L shaped.As shown in Figure 3 B, the first photovoltaic panel 113 and the second photovoltaic panel 114 are pivotally connected mode and are fixed in main body 112, and rotatable organize work and folding packing up deposited.
The first usb 1 15 is arranged in main body 112, and by USB connection lead 117(as shown in Figure 3A) be connected with the secondary USB interface 118 being arranged on automatic navigator 11, for Charge Management unit 119 chargings in automatic navigator 11.
As shown in Figure 3 C, when normal operation, first by user, buckle 111 is being fixed, and connect the first usb 1 15 and secondary USB interface 118 by USB connection lead 117, then rotate the first photovoltaic panel 113 and the second photovoltaic panel 114, opened certain angle to increase illuminating area, be now covered with in the photovoltaic sheet of whole the first photovoltaic panel 113 and the second photovoltaic panel 114 and can start conversion solar energy, and be automatic navigator 11 chargings.
Second embodiment of the invention, Fig. 4 A and Fig. 4 B are depicted as the charging unit 21 of automatic navigator 20 of the present invention, this automatic navigator 20 is vehicular rear mirror navigating instruments of a kind of integrated former car back mirror and automatic navigator, this vehicular rear mirror navigating instrument 20 is integrated former car back mirror and automatic navigator, because former car back mirror and automatic navigator are incorporated in a complete structure, so this charging unit 21 fit structure of not having buckle and snap fit to form.
Charging unit 21 comprises main body 211, photovoltaic panel 212 and USB interface pin 213.
As shown in Figure 4 C, when normal operation, rotation photovoltaic panel 212, is opened certain angle to increase illuminating area, and the photovoltaic sheet that is covered with whole photovoltaic panel 212 can start conversion solar energy, and is Charge Management unit 23 chargings in vehicular rear mirror navigating instrument 20.
As shown in Figure 5, Charge Management of the present invention unit 23 is arranged at the mainboard inside of vehicular rear mirror navigating instrument 20, and comprises: current detection module 231, voltage detection module 232, charging chip 233, thermally dependent resistor 234, adjustable resistor 235, status indicator lamp 236, battery voltage detection module 237, super capacitor 238 and lithium cell 239.
Thermally dependent resistor 234 is for surveying the surface temperature of lithium cell 239 and result being fed back to charging chip 233 with level value form.
Battery voltage detection module 237 is also to consist of AD converter, for the voltage of lithium cell 239 is carried out to real-time monitoring.
In order to adapt to the illumination variation environment under riving condition, the charging method of Charge Management of the present invention unit has been improved syllogic Charge Management scheme conventional in conventional terminal, increased the energy-storage travelling wave tube of super capacitor 238 as solar energy photovoltaic panel, and by arranging and detect the two-stage voltage threshold V of super capacitor
level-1and V
level-2, increased charging valtage surplus, can carry out accurate charging and control.
See theoretically, the output voltage of solar energy photovoltaic panel becomes logarithmic relationship with input light intensity, and super capacitor voltage is lower than threshold value V
level-1corresponding weak illumination condition, higher than V
level-2corresponding intense light irradiation condition.Lower than V
level-1voltage time charging may cause the power down of solar energy photovoltaic panel voltage, therefore can not start charging, and higher than V
level-1lower than V
level-2the corresponding general illumination condition of voltage, can only be with constant-voltage charge pattern or the charging of trickle charge pattern, and higher than V
level-2the corresponding intense light irradiation condition of voltage, can constant current charging mode charging.Detection based on to the two poles of the earth voltage threshold, can start respectively and carry out constant-current charge, constant-voltage charge or trickle charge, and starts charging in intervals or abandon current charging in intervals, thereby carries out Charge Management.
As shown in Figure 6, the charging method of automatic navigator of the present invention is to be applied in above-mentioned Charge Management unit 23, Charge Management unit 23 comprises: current detection module 231, voltage detection module 232, charging chip 233, thermally dependent resistor 234, adjustable resistor 235, status indicator lamp 236, battery voltage detection module 237, super capacitor 238 and lithium cell 239, the method comprises the steps:
1, thermally dependent resistor 234 detects the temperature T of lithium cell 239, and detected value is fed back to charging chip 233, and charging chip 233 judges whether this temperature is greater than threshold value T
offif be greater than threshold value T
offprocess of charging finishes, otherwise enters step 2; In the present embodiment, threshold value T
offspan be 60 to 70 degree;
2, voltage detection module 232 detects the voltage V at USB interface pin 233 places
in, and judge V
inwhether be greater than initial low voltage detection threshold V
level-1if proceed to step 3, otherwise proceed to step 9; In the present embodiment, initial low voltage detection threshold V
level-1span be 0.75～0.85 times of lithium cell 239 charging deboost rated values;
3, battery voltage detection module 237 detects the actual value V of lithium cell 239 terminal voltages
batwhether be less than the trickle charge predeterminated voltage value V of charging chip 233
tRIKLif be less than and enter step 4, otherwise enter step 5; In the present embodiment, the trickle charge predeterminated voltage value V of charging chip 233
tRIKLvalue be about 0.7 times of lithium cell 239 charging deboost rated value.
4, start 233 pairs of lithium celies 239 of charging chip according to the charging of trickle pattern, and detect the terminal voltage V of lithium cell 239
batwhether lower than trickle charge predeterminated voltage value V
tRIKL, if it is maintain the circulation of step 4, otherwise proceed to step 5; The benefit one of this step is to utilize energy-storage travelling wave tube try one's best energy storage level and smooth charging valtage, the 2nd, and reserved voltage margin, avoids V
inwhile drifting about up and down in the time of near routine is set charged electrical pressure point, charging chip is start and stop charging in intervals frequently.
5, battery voltage detection module 237 detects the terminal voltage V of lithium cell 239
bat, and judge terminal voltage V
batwhether higher than trickle charge predeterminated voltage value V
tRIKL, and have V
inhigher than V
level-1and lower than V
level-2, if yes then enter step 6, otherwise enter step 7; In the present embodiment, V
level-1span be 0.7～0.75 times of lithium cell 239 charging deboost rated values, V
level-2span be 0.9～0.95 times of lithium cell 239 charging deboost rated values;
6, charging chip 233 starts constant voltage mode charging, and current detection module 231 continues to monitor the charging current I of lithium cell 239 and judges whether it is less than cutoff current I
offif, show also underfill of charging, maintain current step, otherwise enter step 8; In circulation, voltage detection module 232 detects the voltage V at USB interface pin 233 places
in, and judge V
inwhether be greater than V
level-2if, jump out this circulation, enter step 7.In the present embodiment, cutoff current I
offvalue be 0.1C(wherein C represent load current value);
7, charging chip 233 starts constant current mode charging, and battery voltage detection module 237 continues to detect the terminal voltage V of lithium cell 239
bat, and judged whether V
batlower than V
level-2, if it is maintain the circulation of current step, otherwise enter step 8.The benefit of this step be can illumination fully, solar panels output voltage is full of battery as early as possible with large current system when enough, saves charging duration.Charging chip 233 starts constant voltage mode charging, and current detection module 231 continues to monitor the charging current I of lithium cell 239 and judges whether it is less than cutoff current I
off, show if not also underfill of charging, maintain the circulation of current step, otherwise enter step 8; In the present embodiment, cutoff current I
offvalue be 0.01C;
8, charging chip 233 starts constant voltage mode charging again, and current detection module 231 continues to monitor the charging current I of lithium cell 239 and judges whether it is less than cutoff current I
off, show if not also underfill of charging, maintain the circulation of current step, otherwise enter step 9;
9, disconnect the output of charging chip 233, finish current process of charging.
If in above-mentioned process of charging, because illumination condition changes the voltage V that causes USB interface pin 233 places
inlower than V
level-1, 233 abandon current charging in intervals, enter park mode, between rest period, the voltage V at USB interface pin 233 places
inonly to super capacitor charging 238 and carry out energy storage, treat that super capacitor 238 voltages rise to be returned to higher than V
level-1after, restart again entire charge cycle one time.
In order to describe above-mentioned Charge Management process, below by an example, describe.If it is 4.2V that the charging of lithium cell is full of voltage, the high charge pressure limiting of battery is 4.25V, and constant-current charge electric current is 1C, and it is 0.01C that trickle charge finishes electric current, V
level-1be made as 3.25V, V
level-2be made as 4.03V:
When input voltage is greater than low voltage detection threshold V
level-1during with battery terminal voltage, charging chip starts to start charging in intervals to lithium cell charging, if the voltage of battery voltage detection input end is lower than 3V, charger carries out precharge with trickle pattern to lithium cell with little electric current, when the voltage of battery voltage detection input end surpasses 3V and solar energy photovoltaic panel input voltage be greater than V
level-2, charger adopts constant current mode to lithium cell charging, charging current is according to battery behavior, by the resistance that arranges arranging between pin and ground GND, determined, when the voltage of battery voltage detection input end approaches battery terminal voltage 4.2V, charging current reduces, Charge Management unit finishes the constant-current charge cycle, enter constant-voltage charge pattern, when input voltage is greater than 4.2V, and when charging current is reduced to charging end threshold value 0.01C, charging in intervals finishes, if in process of charging, input voltage power-off or low electricity, current charging in intervals is abandoned completely, and when input voltage recovers, to start to detect outside super capacitor threshold value and carry out brand-new charging in intervals, when input voltage power down is lower than V
level-1or input voltage is during lower than cell pressure, charging unit enters the sleep pattern of low-power consumption, the electric current of battery-end consumption is uA level, thereby increased standby time, solar panels carry out energy storage to super capacitor charging, when solar electrical energy generation deficiency, and during lithium battery quantity not sufficient, pull up the USB interface of charging unit, insert car and fill, turn by car and fill power supply.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a charging unit for automatic navigator, comprises a plurality of buckles, main body, the first photovoltaic panel, the second photovoltaic panel and the first USB interface, it is characterized in that,
Former car back mirror is arranged between charging unit and automatic navigator;
Buckle is arranged on the rear portion of main body, and coordinates with the snap fit at automatic navigator rear portion, so that former car back mirror is fixed between charging unit and automatic navigator;
The first photovoltaic panel and the second photovoltaic panel are folding, and are arranged at respectively the both sides of fixed crank and the ball journal of former car back mirror, and are shaped as L shaped;
The first photovoltaic panel and the second photovoltaic panel are pivotally connected mode and are fixed in main body, and rotatable organize work and folding packing up deposited;
The first USB interface is arranged in main body, and is connected with the secondary USB interface being arranged on automatic navigator by USB connection lead, for the Charge Management unit charging in automatic navigator.
2. a charging unit for automatic navigator, comprises main body, photovoltaic panel and USB interface pin, it is characterized in that,
Automatic navigator is the vehicular rear mirror navigating instrument of a kind of integrated former car back mirror and automatic navigator;
Main body is arranged on the rear portion of vehicular rear mirror navigating instrument;
Photovoltaic panel adopts inverted concave structure, and the mode that is pivotally connected is fixed in main body;
Photovoltaic panel gets around fixed crank and the ball journal of former car back mirror at depression position, rotatable organize work or folding packing up deposited;
Photovoltaic panel is connected with USB interface pin by connection lead, and is further connected with the Charge Management unit of vehicular rear mirror navigating instrument, for charging to vehicular rear mirror navigating instrument.
3. charging unit according to claim 2, it is characterized in that, Charge Management unit is arranged at the mainboard inside of vehicular rear mirror navigating instrument, and comprises current detection module, voltage detection module, charging chip, thermally dependent resistor, adjustable resistor, status indicator lamp, battery voltage detection module, super capacitor and lithium cell.
4. charging unit according to claim 3, it is characterized in that, current detection module is connected between the output pin and lithium cell of charging chip, voltage detection module is connected between USB interface pin and charging chip voltage input pin, thermally dependent resistor is connected between the discharge port negative pole of lithium cell and the hot feedback pin of charging chip, adjustable resistor is connected to charging chip and sets between pin and ground wire, status indicator lamp is connected between the LED lamp indication pin and ground wire of charging chip, battery voltage detection module is connected between the positive pole and ground wire of lithium cell, super capacitor is in parallel with voltage detection module.
5. charging unit according to claim 4, is characterized in that,
Current detection module is for detection of the electric current of charging chip mouth, after detecting again with reference current comparison, and produce a feedback level to the control pin of charging chip, thereby control the electric current of charging chip voltage input pin;
Voltage detection module is for carrying out the digitized voltage value after AD conversion quantification are detected to the input voltage at charging chip voltage input pin place;
Charging chip is comprised of the integrated peripheral components of power transistor and small, dedicated micro controller system, for controlling charging sequential;
Thermally dependent resistor is used for surveying the surface temperature of lithium cell, and result is fed back to charging chip with level value form;
Adjustable resistor is for setting the constant-current charge current value of lithium cell by regulating or preset resistance value;
Status indicator lamp is comprised of LED lamp, for sending different lighting effects in the different phase of charging;
Battery voltage detection module is to consist of AD converter, for the voltage of lithium cell is carried out to real-time monitoring;
Super capacitor is for storing the energy of photovoltaic panel.
6. the charging method of an automatic navigator, to be applied in the Charge Management unit of the mainboard inside that is arranged at vehicular rear mirror navigating instrument, Charge Management unit comprises current detection module, voltage detection module, charging chip, thermally dependent resistor, adjustable resistor, status indicator lamp, battery voltage detection module, super capacitor and lithium cell, it is characterized in that, described method comprises the steps:
(1) thermally dependent resistor detects the temperature T of lithium cell, and detected value is fed back to charging chip, and charging chip judges whether this temperature is greater than threshold value T
offif be greater than threshold value T
offprocess of charging finishes, otherwise enters step (2);
(2) voltage detection module detects the voltage V at USB interface pin place
in, and judge V
inwhether be greater than initial low voltage detection threshold V
level-1if proceed to step (2), otherwise proceed to step (9);
(3) battery voltage detection module detects the actual value V of lithium cell terminal voltage
batwhether be less than the trickle charge predeterminated voltage value V of charging chip
tRIKLif be less than and enter step (4), otherwise enter step (5);
(4) start charging chip lithium cell is charged according to trickle pattern, and detect the terminal voltage V of lithium cell
batwhether lower than trickle charge predeterminated voltage value V
tRIKL, if it is maintain the circulation of current step, otherwise proceed to step (5);
(5) battery voltage detection module detects the terminal voltage V of lithium cell
bat, and judge terminal voltage V
batwhether higher than trickle charge predeterminated voltage value V
tRIKL, and have V
inhigher than V
level-and lower than V
level-, if yes then enter step (6).Otherwise enter step (7);
(6) charging chip starts constant voltage mode charging, and current detection module continues to monitor the charging current I of lithium cell and judges whether it is less than cutoff current I
offif, show also underfill of charging, maintain the circulation of current step, otherwise enter step (8);
(7) charging chip starts constant current mode charging, and battery voltage detection module continues to detect the terminal voltage V of lithium cell
bat, and judged whether V
batlower than V
level-, if it is maintain the circulation of current step, otherwise enter step (8);
(8) charging chip starts constant voltage mode charging again, and current detection module continues to monitor the charging current I of lithium cell and judges whether it is less than cutoff current I
off, show if not also underfill of charging, maintain the circulation of current step, otherwise enter step (9);
(9) disconnect the output of charging chip, finish current process of charging.
7. charging method according to claim 6, is characterized in that, in the process of circulation step (6), voltage detection module detects the voltage V at USB interface pin place
in, and judge V
inwhether be greater than V
level-2if, jump out this circulation, enter step (7).
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| CN201310576295.2A CN103587483B (en) | 2013-11-18 | 2013-11-18 | A kind of charging unit of automatic navigator and charging method |
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| CN103587483B CN103587483B (en) | 2015-08-26 |
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| CN108663055A (en) * | 2018-05-17 | 2018-10-16 | 佛山海格利德机器人智能设备有限公司 | A kind of automatic navigator of Screen sharing |
| CN111551894A (en) * | 2020-05-12 | 2020-08-18 | 江苏斑点狗网络科技有限公司 | Automobile positioning device based on UWB signals and using method thereof |
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Inventor after: Liu Chun Inventor after: Yu Wending Inventor after: Xiong Jing Inventor after: Wang Chunzhi Inventor after: Shao Xiongkai Inventor after: Niu Yan Inventor after: Yang Nan Inventor before: Liu Chun Inventor before: Xiong Jing Inventor before: Wang Chunzhi Inventor before: Shao Xiongkai Inventor before: Niu Yan Inventor before: Yang Nan |
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