CN1612436A - Bridge cell charging circuit device - Google Patents
Bridge cell charging circuit device Download PDFInfo
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- CN1612436A CN1612436A CN 200310103349 CN200310103349A CN1612436A CN 1612436 A CN1612436 A CN 1612436A CN 200310103349 CN200310103349 CN 200310103349 CN 200310103349 A CN200310103349 A CN 200310103349A CN 1612436 A CN1612436 A CN 1612436A
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Abstract
Charging circuit unit includes a circuit for controlling charging current, a circuit for controlling charging voltage, a circuit for providing DC charging current and switching circuit. The circuit for controlling charging current is able to provide larger rated charging current. When electric energy of bridge battery is going to state of saturation, the said rated charging current is closed gradually. The circuit for controlling charging voltage includes temperature compensation circuit. Based on environmental temperature, fixed voltage in use for charging time is adjusted. The circuit for providing DC charging current provides DC current in use for charge sostenuto. The switching circuit controls on/off between bridge battery and application system. When the switching circuit is in on state, the circuit for controlling charging current stops providing the rated charging current. Advantages are: low cost, favorable service time, and always maintaining battery in state of saturation.
Description
Technical field
The present invention relates to a kind of charging circuit device of battery, particularly relate to a kind of charging circuit device of bridge battery, this device can cooperate charging and two kinds of charge modes of trickle charge rapidly.
Background technology
Recently, employed hardware or peripheral equipment in many mobile computers (Notebook), all additional function that Hot insertion hot swapping (Hot Insertion Hot Swapping) arranged.So-called Hot insertion hot swapping function is meant in the computer energized, carry out shutdown also or restart and situation that application program is still being carried out under, change or insert such as Hard Disk Drive (Winchester disk drive), power supply unit, CD-ROM device hardware such as (CD-ROM drives), perhaps peripheral equipment such as keyboard, mouse, and when equipment from computer newly-increased or remove after, operating system is the function of the change done of identification automatically.When carrying out the Hot insertion hot swapping function,, but still must do a little setting although the user need not carry out shutdown.For instance, before the user did to change action to battery, computer just can be carried out battery altering after need being set under the battery swap pattern (Battery Swap Mode).In existing known techniques, the battery swap pattern belongs to a kind of low-power mode (Low Power Mode) usually, even computer can decommission with hard disk, screen is closed, central processing unit is converted to patterns such as low energy state sleep state, make that keeping the required electric energy of System Operation reduces to minimum.
The power supply of mobile computer possesses main battery is arranged (Main Battery) and these two kinds of batteries of bridge battery (Bridge Battery) usually.When main battery is changed, guarantee that the responsibility that storage data (data) does not run off can deliver to random access memory (Random Access Memory, RAM), for example, Dynamic Random Access Memory (Dynamic Random Access Memory) can be by the action of charging periodically again, also be called refresh operation (Refresh Operation), guarantee data integrity, avoid data to run off.The required power supply of this refresh operation then can be got final product by battery pack (Battery Pack) or above-mentioned bridge battery burden.Because the capacitance of main battery is kept about 3 to 4 hours usually only, therefore need to use the user of mobile computer for a long time, all can have more than one main battery usually and change.When changing main battery, if bridge battery is not in the electric energy saturation condition, then can cause refresh operation incomplete, thereby cause the valuable data (data) that stores in the mobile computer to run off or problem such as entanglement execution error instruction takes place.
Ideally, can in 3 to 4 hours, finish and bridge battery is charged to the saturated state of electric energy by low electric energy meet required most.In general, the charging fully of battery can be divided into two processes, charging (Rushing Charge) and trickle charge (Trickling Charge) rapidly, charging makes battery be promoted to full electric energy by low electric energy rapidly, the trickle charge of carrying out again afterwards then is to keep battery with a trickle electric current to be in the full state of electric energy, uses the completely charged mode and can keep higher battery life.But the mode of charging in existing known techniques has following two kinds, a kind ofly is to use single bigger electric current to charge, and after charging is finished, still continues to charge the time limit in useful life of the bridge battery that can detract thus with big electric current.Another kind then is to select for use less current to charge, though life-span that can the maintenance bridges battery, but because the charging required time of bridge battery prolongs, in the replacing main battery, bridge battery can not finished because of charging, can't supply with enough electric energy, cause mobile computer to produce problems such as data loss or instruction errors.
Comprehensive as can be known above-mentioned, it is too small that the charging current that provides is provided the charging circuit device of existing known bridge battery, cause the charging interval long, or the charging current that is provided is excessive, damages inside battery and then shorten the shortcoming of battery life etc.This shows that the charging circuit device of above-mentioned existing bridge battery still has many defectives, and demands urgently further being improved.
Therefore, hope can be designed a quick-charging circuit device that the constant current source function of deciding voltage source and different size of current can be provided under considering with low cost.The complete full charging of this device may command can charging interval about 3 to 4 hours, and still lastingly when electric energy is full of make battery remain on the full state of electric energy with a trickle electric current.Long with the charging interval that charging circuit was caused of improving previous use, or charging current is too big, shortcomings such as impairment battery life.
In order to solve the problem of the charging circuit device existence that has bridge battery now, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that the charging circuit device of above-mentioned existing bridge battery exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, actively studied innovation, in the hope of founding a kind of charging circuit device of novel bridge battery, can improve the charging circuit device of existing bridge battery, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective of the charging circuit device existence of existing bridge battery, and provide a kind of charging circuit device of new bridge battery, technical problem to be solved is that it can decided under the situation of voltage, and bigger quota charging current is provided, and fills the electric energy of full bridge battery apace, only provide the trickle electric current to continue charging then, so that bridge battery remains on the full state of electric energy, and has effect with low cost, be particularly useful in portable computer system or the equipment.
Another object of the present invention is to, a kind of charging circuit device of bridge battery is provided, technical problem to be solved is to make it have more temperature-compensation circuit, the fixed voltage in the time of can charging to adjust at ambient temperature.And when bridge battery provided electric energy to application system, the present invention can stop the quota charging current that to provide above-mentioned, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.The charging circuit device of a kind of bridge battery that proposes according to the present invention, it comprises: a charging current control circuit, in order to a quota charging current to be provided, when the electric energy of this bridge battery entered a full state, charging current was closed by norm gradually; One charging voltage control circuit is coupled to this charging current control circuit, come the charging of this bridge battery in order to a fixed voltage and this quota charging current to be provided, wherein and include a temperature-compensation circuit, its at ambient temperature to adjust this fixed voltage; One DC charging electric current provides circuit, comes this bridge battery charging in order to a direct current electric current to be provided; And a switching circuit, be coupled to this bridge battery, in order to the connecting and disconnecting of controlling this bridge battery and an application system the two one of; Wherein when this switching circuit was connected this bridge battery and this application system, then the charging circuit device of this bridge battery made this charging current control circuit stop to provide this quota charging current.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.The charging circuit device of a kind of bridge battery that proposes according to the present invention, it comprises: one first constant current source circuit, according to a charging current control signal, decision provides one first constant current source and this first constant current source alternatively is not provided; The certain voltage source circuit is coupled to this first constant current source circuit, in order to the certain voltage source to be provided and to transmit this first constant current source; One second constant current source circuit is coupled to this and decides voltage source circuit, in order to one second constant current source to be provided; And a switching circuit, this switching circuit is coupled between this bridge battery and the application system, according to this charging current control signal, in order to the connecting and disconnecting of controlling this bridge battery and this application system the two one of.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The charging circuit device of aforesaid bridge battery wherein more comprises a diode, and this diode is coupled to this to be decided between voltage source circuit and this bridge battery, in order to the protection of reverse bias.
The charging circuit device of aforesaid bridge battery, wherein said first constant current source circuit comprises: a first transistor, first of this first transistor are penetrated/are collected the utmost point and be coupled to this and decide voltage source circuit; One penetrates/collector resistance, is coupled to second of this first transistor and penetrates/collect the utmost point; A plurality of base resistances are coupled to the base stage of this first transistor, in order to forward bias voltage drop to be provided; And a switching device, in order to according to this charging current control signal, with one of those base resistances ground connection with disconnect either-or.
The charging circuit device of aforesaid bridge battery, wherein said switching device comprises: a switching transistor, according to this charging current control signal, in order to ground connection and the earth-free either-or of controlling one of those base resistances; And a resistance-capacitance network, be coupled to the base stage of this switching transistor, in order to this more stable charging current control signal to be provided.
The charging circuit device of aforesaid bridge battery, wherein saidly decide voltage source circuit, comprise: a transistor seconds, the collection utmost point of this transistor seconds is coupled to this first constant current source circuit, the emitter-base bandgap grading of this transistor seconds is in order to transmitting this first constant current source, and an emitter voltage source is set at this decides voltage source output; And plurality of fixed resistance, be coupled to the base stage of this transistor seconds, in order to bias voltage to be provided.
The charging circuit device of aforesaid bridge battery is wherein saidly decided voltage source circuit and is more comprised a temperature-compensation circuit, should decide the voltage source voltage swing according to the ambient temperature adjustment.
The charging circuit device of aforesaid bridge battery, wherein said temperature-compensation circuit comprises: a battery temperature compensation system, this battery temperature compensation system are by a thermistor and a fixed resistance and connect and form; And a circuit temperature bucking-out system, this circuit temperature bucking-out system is to be formed by a plurality of diodes serial connections.
The charging circuit device of aforesaid bridge battery, the number of wherein said those diodes are to be two.
The charging circuit device of aforesaid bridge battery, wherein said switching circuit comprises: one the 3rd transistor, according to this charging current control signal, in order to control source electrode and drain be switched on or switched off the two one of; And a basic source resistance, cross-over connection is between the 3rd transistorized base stage and source electrode, in order to bias voltage to be provided.
The charging circuit device of aforesaid bridge battery, wherein said bridge battery are to compose in series for a plurality of Ni-MH batteries.
The charging circuit device of aforesaid bridge battery, wherein said application system are for a mobile computer comprises a main battery, when the electric energy of this main battery exhausts, provide this mobile computer required electric energy by this bridge battery.
The charging circuit device of aforesaid bridge battery, the size of wherein said first constant current source are between for the battery rated current 0.3 to 0.5 times.
The charging circuit device of aforesaid bridge battery, the size of wherein said second constant current source are 1/30 times for the battery rated current.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The charging circuit device of a kind of bridge battery provided by the invention, it comprises: charging current control circuit, charging voltage control circuit, DC charging electric current provide circuit and switching circuit.Wherein charging current control circuit can provide the quota charging current, when the electric energy of bridge battery enters full state, gradually this quota charging current is closed.Charging voltage control circuit wherein is coupled to charging current control circuit, it is in order to provide fixed voltage, and come bridge battery charging with above-mentioned quota charging current, this charging voltage control circuit also includes temperature-compensation circuit, can be at the fixed voltage of ambient temperature when adjusting charging.It is in order to provide direct current to come bridge battery is charged that the DC charging electric current provides circuit.And switching circuit is coupled to bridge battery, in order to be switched on or switched off between control bridge battery and the application system.When switching circuit was connected bridge battery and application system, then the charging circuit device of bridge battery of the present invention made above-mentioned charging current control circuit stop to provide the quota charging current.
From another viewpoint, the present invention is for addressing the above problem the charging circuit device that a kind of bridge battery also is provided, and this device includes one first constant current source circuit, one at least and decides voltage source circuit, second constant current source circuit, a bridge battery, a switching circuit.
First constant current source circuit provides one first constant current source, and this first constant current source uses when bridge battery charges rapidly, and when charging enters full state, gradually first constant current source is closed.Decide voltage source circuit and be electrically connected to first constant current source circuit, should decide voltage source circuit provides one to decide voltage source as charging voltage, and transmit the first above-mentioned constant current source as charging current, bridge battery is charged, decide in the voltage source circuit and include a temperature-compensation circuit at this, this temperature-compensation circuit can be adjusted the size that this decides voltage source according to ambient temperature.Temperature-compensation circuit among the embodiment also is divided into two systems, a battery temperature compensation system that is the position near bridge battery, and another then is the circuit temperature bucking-out system of position near charging circuit.The adjustment mode of temperature-compensation circuit is when ambient temperature raises, and reduces and decides voltage source, and when ambient temperature reduces, then raise and decide voltage source.
After the bridge battery electric energy is full of, charged state will enter the trickle charge stage, this moment, charging current continued to provide second constant current source to come bridge battery is charged by second constant current source circuit, and purpose is that the bridge battery of wanting electric energy to be full of can maintain full state.Switching circuit then is to be electrically connected to bridge battery, is used for annexation between connecting and disconnecting bridge battery and the application system.Wherein, when switching circuit was connected bridge battery and application system, then first constant current source circuit can stop to provide first constant current source.Charging device among the embodiment also comprises a diode, and its negative terminal is connected to bridge battery, and anode then is connected to decides voltage source circuit.As bridge battery and the protective device when deciding between the voltage source circuit to produce the reverse bias phenomenon.
Because above charging circuit device utilizes element such as transistor AND gate resistance to realize, the cost cost is cheap.This device adopts the mode of deciding voltage source and current limit source to charge, the required charging interval is 3 to 4 hours, can be before main battery exhausts, be full of the capacitance of bridge battery, and the size of deciding voltage source has temperature-compensation circuit control, so provide a kind of wide temperature range and safety charging fast again that is applicable to.Because second constant current source circuit provides one second constant current source to use as the trickle electric current, so can make the capacitance of bridge battery maintain full state forever.Because charging process meets complete charging procedure, so can keep good bridge battery useful life.
Via as can be known above-mentioned, the invention relates to a kind of charging circuit device of bridge battery, it comprises: charging current control circuit, charging voltage control circuit, DC charging electric current provide circuit and switching circuit.Charging current control circuit can provide bigger quota charging current, when the electric energy of bridge battery enters full state, gradually this quota charging current is closed.Charging voltage control circuit includes temperature-compensation circuit, the fixed voltage in the time of can charging to adjust at ambient temperature.It is in order to continue to provide the direct current of charging usefulness that the DC charging electric current provides circuit.And be switched on or switched off between switching circuit control bridge battery and the application system.When switching circuit was connected bridge battery and application system, then the charging circuit device of bridge battery of the present invention made above-mentioned charging current control circuit stop to provide specified charging current.
By technique scheme, the charging circuit device of bridge battery of the present invention, can decide under the situation of voltage, bigger quota charging current is provided, fill the electric energy of full bridge battery apace, only provide the trickle electric current to continue charging then, so that bridge battery remains on the full state of electric energy, and, and be particularly useful in portable computer system or the equipment because of it has effect with low cost.The present invention has more temperature-compensation circuit in addition, the fixed voltage in the time of can charging to adjust at ambient temperature.And when bridge battery provided electric energy to application system, the present invention can stop the quota charging current that to provide above-mentioned, thereby is suitable for practicality more.
In sum, the charging circuit device of the bridge battery of special construction of the present invention, have above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and the charging circuit device of more existing bridge battery has the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Description of drawings
Fig. 1 is the block schematic diagram according to the charging circuit device of a preferred embodiment of the present invention.
Fig. 2 A illustrates the charging characteristic curve figure of voltage to the time.
Fig. 2 B illustrates the charging characteristic curve figure of electric current to the time.
Fig. 3 is the device schematic diagram according to first constant current source circuit of a preferred embodiment of the present invention.
Fig. 4 is the device schematic diagram according to the employed switching circuit of first constant current source of a preferred embodiment of the present invention.
Fig. 5 is the device schematic diagram of deciding voltage source circuit according to a preferred embodiment of the present invention.
Fig. 6 is the switching circuit figure according to a preferred embodiment of the present invention.
Constant current source circuit 107 in 105: the first: decide voltage source circuit
Constant current source circuit 111 in 109: the second: bridge battery
113: switching circuit 115: application system
Connect end at 117: the first and connect end at 119: the second
121: charging control signal 123: diode
301: transistor 306～309: fixed resistance
315: the second contacts of 312: the first contacts
Contact 404 in 318: the three: transistor
408: fixed capacity 412: fixed resistance
501: transistor 503～507: fixed resistance
509: thermistor 511,513: diode
601: transistor 603: fixed resistance
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, its embodiment of charging circuit device, structure, feature and the effect thereof of the bridge battery that foundation the present invention is proposed, describe in detail as after.
Seeing also shown in Figure 1ly, is the block schematic diagram according to the charging circuit device of a preferred embodiment of the present invention.In this charging circuit device, comprise first constant current source circuit 105, decide voltage source circuit 107, second constant current source circuit 109, bridge battery 111, switching circuit 113 and application system 115.Decide first of voltage source circuit 107 and connect end 117 and be connected with first constant current source circuit 105, second connects that to hold 119 be to be connected with bridge battery 111.First constant current source circuit 105 can judge whether first constant current source exported to according to charging control signal 121 to be decided in the voltage source circuit 107.Under the situation of charging rapidly, at first, first constant current source circuit 105 can provide first constant current source to deciding voltage source circuit 107.Next, decide one of 107 of voltage source circuits output decide voltage source and transmit this first constant current source to bridge battery 111 as bridge battery 111 required charging voltage and charging currents use.
When charging end rapidly, change trickle charge over to during the stage, first constant current source circuit 105 can make bias voltage change owing to decide the rising of voltage source, exports first constant current source of deciding voltage source circuit 107 to and also just drops to closed condition thereupon gradually.The trickle charge stage be by second current source circuit 109 provide second constant current source to bridge battery 111 as charging current, add decide that voltage source circuit 107 provided decide voltage source as charging voltage, bridge battery is carried out trickle charge.When changing main battery, just need to use bridge battery 111 to provide in the electric energy, can be by charging control signal 121 driving switch circuit 113, making application system 115 and bridge battery 111 conductings provides application system 115 its required electric energy.In the present embodiment, be connected a diode 123 on the connection line of second constant current source circuit 109 and bridge battery 111, this is the protective device when being used for generation reverse bias phenomenon between anti-fastening voltage source circuit 107 and the bridge battery 111.Though that uses in the present embodiment is diode, in practical application and need not be as limit.
In simple terms, the complete charging flow of battery roughly can be divided into charging and two stages of trickle charge rapidly.See also voltage that Fig. 2 A illustrated to the charging characteristic curve figure of time, and the electric current that illustrated of Fig. 2 B is to the charging characteristic curve figure of time.At first see also shown in Fig. 2 A, except that time that just begins to charge, see outside the variation that voltage promotes, in charging process fully, no matter be charging stage or trickle charge stage rapidly, voltage nearly all maintains a constant state not to be changed.Next see also shown in Fig. 2 B, when charging process had just begun, electric current fixedly remained big electric current, was charging stage rapidly this moment.After after a while, the capacitance of the battery state that approaches to saturation, electric current just is gradually reduced to a minimum electric current, just maintains that minimum electric current afterwards always, and be the trickle charge stage this moment.In this preferred embodiment, provide the required big electric current that charges rapidly by first constant current source circuit 105, provide trickle charge required little electric current by second constant current source circuit 109, both complement each other and make bridge battery 111 can reach fully charging, and since use correct charging modes make battery useful life also so avoided the destiny that is shortened.In the present embodiment, the size of big electric current is about between 0.3 to 0.5 times of battery rated current, and the size of little electric current then is 1/30 times of battery rated current.
Then seeing also shown in Fig. 3 A, is the device schematic diagram according to first constant current source circuit of a preferred embodiment of the present invention.This installs employed element 303,306,309 and transistors 301 of three fixed resistances, wherein, the bipolar joint transistor of transistor 301 employing positive-negative-positive formulas (BipolarJunction Transistor, BJT).Select for use suitable fixed resistance 303,306,309 that suitable bias voltage is provided, make transistor 301 conductings and be operated in initiatively linear zone, when charging rapidly, an exportable fixing collected current uses as first constant current source, and the size of this collected current can be by fixed resistance 303,306,309 decisions.Trickle charge is during the stage, because along with deciding increasing gradually of voltage source, forward bias voltage drop descends gradually, makes transistor 301 close, and can't continue to provide collected current.No matter be to charge rapidly or the trickle charge stage, first constant current source circuit can drive the 3rd contact 318 according to charging current control signal 121, make and be connected to second contact 315 apart from the fixed resistance 309 first nearer contacts 312, be exactly with fixed resistance 309 in simple terms, be the base resistance ground connection of transistor 301, be used for producing forward bias voltage drop.
Next seeing also shown in Fig. 3 B, is the device schematic diagram according to another kind first constant current source circuit of a preferred embodiment of the present invention.In Fig. 3 B, we provide another first constant current source circuit, and the function of this first constant current source circuit is identical with the function of first constant current source circuit that provides among Figure 1A.Just in this figure, replace original fixed resistance 303 with diode 302a and diode 302b.
Though more than exemplified the example of two kinds of first different current source circuits, do not limit first current source circuit of the present invention and leave no choice but design like this with this, have the knack of this skill person and can make various variation according to technical spirit of the present invention.
Above-mentioned first, second and the 3rd contact 312,315,318 can use in fact metal-oxide semiconductor fieldeffect transistor (Metal-Oxide-Semiconductor Field EffectTransistor, MOFET) three bring in realization.See also shown in Figure 4, it is device schematic diagram according to the employed switching circuit of first constant current source circuit of a preferred embodiment of the present invention, wherein the source electrode of metal-oxide semiconductor fieldeffect transistor 404 be first connect the end 312, drain as second connect the end 315, base stage then as the 3rd connect the end 318, add fixed resistance 412 and electric capacity 408 in addition, provide bias voltage, decision conducting or this transistor 404 of not conducting.In practical application, also can use easy three-terminal switch to substitute, not need as limit.
Then seeing also shown in Figure 5ly, is the device schematic diagram of deciding voltage source circuit according to a preferred embodiment of the present invention, and this device includes a temperature-compensation circuit.Ni-MH battery (Nickel-hydrogen Batteries) is a kind of high-effect battery that is widely used on the mobile computer product.Have higher capacitance because it is compared with nickel-cadmium cell (Nickel-cadmium Batteries), thereby range of application is comparatively broad.The internal resistance meeting of Ni-MH battery is risen with temperature and is reduced, cause cell voltage to descend, if deciding voltage source voltage can't turn down with the temperature rising, it is full to cause battery to fill, but first current source circuit can't be closed fully, and form long-time excessive trickle charge, and cause the problem of battery life impairment.Therefore wishing can have when ambient temperature raises, charging voltage is turned down, and during the ambient temperature reduction, the circuit arrangement that charging voltage is heightened.Therefore, provide the temperature-compensation circuit that to adjust voltage swing in response to ambient temperature in the present embodiment.Wherein thermal resistance resistance 509 and fixed resistance 507 and the position that meets the battery temperature compensation system that is formed be near bridge battery 111, and the position of the circuit temperature bucking-out system of being made up of two diodes, 511,513 serial connections then is to be close to charging circuit.
In the present embodiment, transistor 501 uses the bipolar joint transistor of npn type.Provide conducting voltage by fixed resistance 503,505 suitable combinations, make transistor 501 conductings, can export first constant current source circuit by emitter-base bandgap grading and input to first constant current source of the collection utmost point and one and decide voltage source to bridge battery, this is the situation of charging rapidly.When entering trickle charge during the stage, 501 in transistor can not provide first constant current source to bridge battery.
At last, seeing also shown in Figure 6ly, is the device schematic diagram according to the switching circuit of a preferred embodiment of the present invention.This device is arranged between bridge battery 111 and the application system 115, decides being connected between conducting or not conducting bridge battery 111 and the application system 115 according to charging current control signal 121.The base stage of transistor 601 is accepted the input of charging current control signal 121, and between base stage and source electrode, is connected to a fixed resistance 603, when transistor 601 conductings, provides suitable bias voltage.When main battery is changed, charging current control signal 121 turn-on transistors 601, then application system 115 can be used the electric energy that bridge battery 111 is provided.In the present embodiment, transistor 601 is metal-oxide semiconductor fieldeffect transistors, but also need not be as limit in practical application.
The present invention so strengthens handling the reason in trickle charge stage, even if electronic equipment is not when being used, holding state for example, the battery pack that it disposed still can be carried out self-discharge, battery with mobile phone is an example, if the battery of ni-mh material, then every day on average can be by about 1% discharges of residual capacitance; If the battery of lithium material is average 0.2～0.3% discharge of approximately pressing residual capacitance every day then.For making bridge battery maintain full state, the device that trickle charge is provided is necessity that its existence is arranged.Bridge battery can be formed by a plurality of Ni-MH battery serial connections in a preferred embodiment of the present invention.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (14)
1, a kind of charging circuit device of bridge battery is characterized in that it comprises:
One charging current control circuit in order to a quota charging current to be provided, when the electric energy of this bridge battery enters a full state, should the quota charging current be closed gradually;
One charging voltage control circuit is coupled to this charging current control circuit, come the charging of this bridge battery in order to a fixed voltage and this quota charging current to be provided, wherein and include a temperature-compensation circuit, its at ambient temperature to adjust this fixed voltage;
One DC charging electric current provides circuit, comes this bridge battery charging in order to a direct current electric current to be provided; And
One switching circuit is coupled to this bridge battery, in order to the connecting and disconnecting of controlling this bridge battery and an application system the two one of;
Wherein when this switching circuit was connected this bridge battery and this application system, then the charging circuit device of this bridge battery made this charging current control circuit stop to provide this quota charging current.
2, a kind of charging circuit device of bridge battery is characterized in that it comprises:
One first constant current source circuit, according to a charging current control signal, decision provides one first constant current source and this first constant current source alternatively is not provided;
The certain voltage source circuit is coupled to this first constant current source circuit, in order to the certain voltage source to be provided and to transmit this first constant current source;
One second constant current source circuit is coupled to this and decides voltage source circuit, in order to one second constant current source to be provided; And
One switching circuit, this switching circuit are coupled between this bridge battery and the application system, according to this charging current control signal, in order to the connecting and disconnecting of controlling this bridge battery and this application system the two it
3, the charging circuit device of bridge battery according to claim 2 is characterized in that wherein more comprising that a diode, this diode are coupled to this and decide between voltage source circuit and this bridge battery, in order to the protection of reverse bias.
4, the charging circuit device of bridge battery according to claim 2 is characterized in that wherein said first constant current source circuit, comprising:
One the first transistor, first of this first transistor are penetrated/are collected the utmost point and be coupled to this and decide voltage source circuit;
One penetrates/collector resistance, is coupled to second of this first transistor and penetrates/collect the utmost point;
A plurality of base resistances are coupled to the base stage of this first transistor, in order to forward bias voltage drop to be provided; And
One switching device, in order to according to this charging current control signal, with one of those base resistances ground connection with disconnect either-or.
5, the charging circuit device of bridge battery according to claim 4 is characterized in that wherein said switching device, comprising:
One switching transistor is according to this charging current control signal, in order to ground connection and the earth-free either-or of controlling one of those base resistances; And
One resistance-capacitance network is coupled to the base stage of this switching transistor, in order to this more stable charging current control signal to be provided.
6, the charging circuit device of bridge battery according to claim 2 is characterized in that the wherein said voltage source circuit of deciding, and comprising:
One transistor seconds, the collection utmost point of this transistor seconds is coupled to this first constant current source circuit, and the emitter-base bandgap grading of this transistor seconds is in order to transmitting this first constant current source, and an emitter voltage source is set at this decides voltage source output; And
Plurality of fixed resistance is coupled to the base stage of this transistor seconds, in order to bias voltage to be provided.
7, the charging circuit device of bridge battery according to claim 6 is characterized in that wherein saidly deciding voltage source circuit and more comprising a temperature-compensation circuit, should decide the voltage source voltage swing according to the ambient temperature adjustment.
8, the charging circuit device of bridge battery according to claim 7 is characterized in that wherein said temperature-compensation circuit, comprising:
One battery temperature compensation system, this battery temperature compensation system are by a thermistor and a fixed resistance and connect and form; And
One circuit temperature bucking-out system, this circuit temperature bucking-out system are to be formed by a plurality of diode serial connections.
9, the charging circuit device of bridge battery according to claim 8, the number that it is characterized in that wherein said those diodes are to be two.
10, the charging circuit device of bridge battery according to claim 2 is characterized in that wherein said switching circuit, comprising:
One the 3rd transistor, according to this charging current control signal, in order to control source electrode and drain be switched on or switched off the two one of; And
One basic source resistance, cross-over connection is between the 3rd transistorized base stage and source electrode, in order to bias voltage to be provided.
11, the charging circuit device of bridge battery according to claim 2 is characterized in that wherein said bridge battery is to compose in series for a plurality of Ni-MH batteries.
12, the charging circuit device of bridge battery according to claim 2, it is characterized in that wherein said application system is to comprise a main battery for a mobile computer, when the electric energy of this main battery exhausts, provide this mobile computer required electric energy by this bridge battery.
13, the charging circuit device of bridge battery according to claim 2, the size that it is characterized in that wherein said first constant current source are between for the battery rated current 0.3 to 0.5 times.
14, the charging circuit device of bridge battery according to claim 2, the size that it is characterized in that wherein said second constant current source are 1/30 times for the battery rated current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310103349 CN1612436A (en) | 2003-10-29 | 2003-10-29 | Bridge cell charging circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310103349 CN1612436A (en) | 2003-10-29 | 2003-10-29 | Bridge cell charging circuit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1612436A true CN1612436A (en) | 2005-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310103349 Pending CN1612436A (en) | 2003-10-29 | 2003-10-29 | Bridge cell charging circuit device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1612436A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437608A (en) * | 2011-12-07 | 2012-05-02 | 北京威视数据系统有限公司 | Uninterruptible power supply (UPS) power supply system and disk array with built-in UPS power supply system |
| CN103222147A (en) * | 2010-11-25 | 2013-07-24 | 诺基亚公司 | Context aware battery charging |
| CN101237153B (en) * | 2006-12-08 | 2015-05-06 | 成都芯源系统有限公司 | Battery charging circuit and method for charging battery |
-
2003
- 2003-10-29 CN CN 200310103349 patent/CN1612436A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237153B (en) * | 2006-12-08 | 2015-05-06 | 成都芯源系统有限公司 | Battery charging circuit and method for charging battery |
| CN103222147A (en) * | 2010-11-25 | 2013-07-24 | 诺基亚公司 | Context aware battery charging |
| US9300157B2 (en) | 2010-11-25 | 2016-03-29 | Nokia Technologies Oy | Context aware battery charging |
| CN103222147B (en) * | 2010-11-25 | 2017-04-19 | 诺基亚技术有限公司 | Context aware battery charging |
| CN102437608A (en) * | 2011-12-07 | 2012-05-02 | 北京威视数据系统有限公司 | Uninterruptible power supply (UPS) power supply system and disk array with built-in UPS power supply system |
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