CN2255693Y

CN2255693Y - Intelligent charged cell mouldblock

Info

Publication number: CN2255693Y
Application number: CN 96215463
Authority: CN
Inventors: 郑世君; 宁华
Original assignee: YIPEIQI INDUSTRY Co Ltd SHENZHEN
Current assignee: YIPEIQI INDUSTRY Co Ltd SHENZHEN
Priority date: 1996-07-15
Filing date: 1996-07-15
Publication date: 1997-06-04
Anticipated expiration: 2006-07-15

Abstract

The utility model relates to an intelligent charged cell module, which comprises a casing, a storage battery arranged in the casing and a charging circuit board. The input current enters from a socket DCIN on the casing, passes through a field-effect transistor Q2 on the circuit board, and then passes from the positive direction of a diode D2 to charge up a battery unit BAT, and simultaneously the battery unit provides load current for a mobile phone in use. An intelligent charging control integrated circuit U2 controls the grid voltage of the field-effect transistor Q2 through a transistor Q3 by the modulation control terminal MOD, therefore, the charging current can be regulated automatically. Due to the adoption of an integrated design, the charged cell module can cause the battery unit to store electric energy effectively and have long service life as long as possible, and the mobile phone can also be used in normal charging simultaneously.

Description

The intelligent charge battery module

The utility model relates to the current supply arrangement of mobile telephone system terminal equipment, particularly relate to be used for mobile phone, harvest battery pack and charging circuit in the rechargable power supplies box of one.The battery case of prior art mobile phone be with it separately design of charger, produce respectively and supply; run into batteries characteristic and the unmatched situation of dissimilar charger performances through regular meeting; so that can't the accumulators group effectively charge, even battery pack occurs and cross fortuitous events such as thermal explosion.The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and provides a kind of battery pack and charging circuit of harvesting in the intelligent charge battery module of one.This battery module of personal handyphone adapted can solve the problem of batteries charging deficiency effectively, and can avoid the generation of contingency in the charging process, and more convenient to use, even can use the mobile phone of this battery module of configuration under the fast charging battery module state simultaneously.The purpose of this utility model can reach by taking following measure: design and produce a kind of intelligent charge battery module, comprise shell and be loaded on its interior batteries, also comprise the charging circuit board that is positioned at this battery pack below.Electric semiconductor pipe, transistor, intelligent charge control integrated circuit and diode are arranged on the described circuit board.Input current enters from socket DC IN, and through the electric semiconductor pipe, forward passes through a diode toward batteries charging again, and provides load current for the mobile phone in using simultaneously.Described charging control integrated circuit is modulated the grid voltage of control end through described transistor controls electric semiconductor pipe with it, thereby regulates charging current automatically.The drawing of accompanying drawing is described as follows:

Fig. 1 is the upward view of the utility model charging cell module;

Fig. 2 is the internal structure schematic diagram of described charging cell module;

Fig. 3 is the end view of described charging cell module;

Fig. 4 is the basic circuit diagram of the utility model charging circuit board 2.Be described in further detail below in conjunction with the most preferred embodiment shown in each accompanying drawing: the utility model intelligent charge battery module comprises plastic casing and is loaded on its interior batteries 1 (BAT), as shown in Figure 2, but also comprise the charging circuit board 2 that is positioned at battery pack 1 below.On the described circuit board 2, as shown in Figure 4, electric semiconductor pipe Q2, transistor Q3, intelligent charge control integrated circuit U2 and diode D2 are arranged.Input current enters from socket DC IN, through transistor Q2, in most preferred embodiment of the present utility model, this transistor Q2 adopts the V-MOS field of electric force effect transistor of P channel-type, flow through source electrode-drain electrode of Q2 of input current, forward charges toward battery pack BAT by diode D2 again, and provides load current for the mobile phone in using simultaneously.Integrated circuit U2 adopts U.S. BQ2003 type intelligent charge control integrated circuit, its modulation control end MOD is through transistor Q3 control electric semiconductor pipe Q2, be the grid-source voltage of control V-MOS field-effect transistor in described embodiment, thereby regulate charging current automatically.As shown in Figure 3; the utility model charging cell module shell side and the light-emitting diode 6 (CHG) of electric current input socket 7 (DC IN) and indicating circuit operating state is arranged; referring to Fig. 4; input socket DC IN week edge joint common point (); its internal core wire is connected to electric semiconductor pipe Q2 on circuit board 2; it is the source electrode of field-effect transistor; another road is connected to+input of 5 volts of integrated regulator U3; the output of U3 to common point () cross-over connection capacitor C 5, C6, provide the utility model control circuit and detection, protective circuit required+5 volts of power supply VCC.The resistance R 5 of the anode of light-emitting diode CHG on circuit board 2 connects+5 volts of power supply VCC, and its negative electrode is connected to the charging indication end CHG of integrated circuit U2 on the circuit board 2.As seen from Figure 4, on described circuit board 2, also have divider resistance RB1 and RB2, its series connection point of two is connected to the cell voltage input BAT of charging control integrated circuit U2 through resistance R B, and between this BAT end and battery pack BAT negative pole cross-over connection filter capacitor CB, constitute the voltage detecting circuit of battery pack BAT thus.Resistance R 6, R7 and R8 form bleeder circuit, for the highest cell voltage end MCV and the high temperature of integrated circuit U2 forbid that charging end TCO provides voltage setting value.Integrated circuit U2 compares with the voltage setting value that MCV holds according to the battery voltage signal of its BAT end input, gets its error amount control field of electric force effect transistor Q2 and charges to battery pack BAT with full electric current, pulse current or little electric current.In addition, also have charging current measuring resistance RSNS on the circuit board 2, the one end connects the transducer input SNS of battery pack BAT negative pole and integrated circuit U2, another termination common point ().The size of the voltage landing reflection charging current on the measuring resistance RSNS with the SNS end of its input ic U2, can have suitable size by field of electric force effect transistor Q2 control charging current.Battery surface in described batteries 1 is glued with negative tempperature coefficient thermistor NTC, referring to Fig. 4, the end of this resistance NTC connects battery pack BAT negative pole, the other end is connected to the series connection point of resistance R T1 and RT2, so as to obtaining forward bias, and be connected to the temperature sensing input TS of integrated circuit U2 from this point again through resistance R T, and between this TS end and battery pack BAT negative pole cross-over connection filter capacitor CT, constitute the temperature observation circuit of battery pack BAT thus.Integrated circuit U2 forbids the required electro-temperature signal of charge protection signal and normal rechargeable battery group temperature rise control with the setting voltage value of its TCO end relatively with the battery pack BAT high and low temperature of the TS of its temperature sensing input TS, get its error amount controlling filed effect transistor Q2 conducting or by.Under the situation of forbidding charging, field effect transistor Q2 ends, and provides path by resistance R 11, keeps tens milliamperes the charging current of keeping for battery pack BAT.The over-current protection circuit of the utility model charging cell module, as shown in Figure 4, the positive pole of batteries BAT connects the negative electrode of second tube sheet D2 and the end of resistance R B1 after series connection positive temperature coefficient resistor PTC, and draws from this point of contact and to be connected to load (mobile phone).The discharging current of battery pack BAT, if promptly the personal handyphone load current of taking is excessive, the resistance PTC temperature rise that is connected in the circuit is increased rapidly, and its resistance value can increase several magnitude suddenly, and the discharge circuit of battery pack BAT is interdicted then.For the mobile phone machine circuit with adapted the utility model charging cell module is connected, referring to Fig. 1 and Fig. 4, described module housing bottom surface has the battery pack negative pole to draw the contact 5 (LOAD) of drawing behind contact 3, the battery anode series connection positive temperature coefficient resistor PTC, and the contact 4 that thermistor one end is drawn.Fig. 1 is all adaptive at Mo Tuoluola 9900 type personal handyphones to structure shown in Figure 3, only is one of most preferred embodiment of the present utility model.Charging cell module of the present utility model is owing to be the personal handyphone adapted, and remaining space is limited in it, so should select the paster electronic component of small size for use.Charging control integrated circuit U2 should possess monitoring battery group voltage, detect necessary functions such as battery pack temperature and overtime charging shutdown.Compare with prior art, advantage of the present utility model is, charging circuit and batteries are assembled in the integrated design in the same shell, can make circuit designers make optimal design at concrete electric properties of battery unit, and can monitor every electrical quantity of batteries directly, effectively, make battery pack stored electric energy and have long as far as possible useful life most effectively.And charging the time need not take off battery module from personal handyphone, can continue to use mobile phone when charging normal.

Claims

1. intelligent charge battery module, comprise shell and be loaded on its interior batteries (1) (BAT), it is characterized in that: also comprise the charging circuit board (2) that is positioned at battery pack (1) below, electric semiconductor pipe Q2, transistor Q3, intelligent charge control integrated circuit U2 and diode D2 are arranged on the described circuit board (2); Input current enters from socket DC IN, and through transistor Q2, forward charges toward battery pack BAT by diode D2 again, and provides load current for the mobile phone in using simultaneously; Integrated circuit U2 controls the grid voltage of electric semiconductor pipe Q2 with its modulated terminal MOD through transistor Q3, thereby regulates charging current automatically.

2. according to the described intelligent charge battery module of claim 1, it is characterized in that: the light-emitting diode (6) that there are electric current input socket (7) (DC IN) and an indicating circuit operating state in described shell side (CHG); Input socket DC IN week edge joint common point (), its internal core wire is connected to the utmost point of electric semiconductor pipe Q2 on circuit board (2), and another road is connected to+input of 5 volts of integrated regulator U3; The resistance R 5 of the anode of light-emitting diode CHG on circuit board (2) connects+5 volts of power supply VCC, and its negative electrode is connected to the charging indication end CHG that circuit board (2) is gone up integrated circuit U2.

3. according to the described intelligent charge battery module of claim 1, it is characterized in that: go up divider resistance RB1 and RB2 in addition at described circuit board (2), its series connection point of two is connected to the cell voltage input BAT of charging control integrated circuit U2 through resistance R B, and between this BAT end and battery pack BAT negative pole cross-over connection capacitor C B, constitute the testing circuit of battery pack BAT voltage thus.

4. according to the described intelligent charge battery module of claim 1, it is characterized in that: go up charging current measuring resistance RSNS in addition at described circuit board (2), the one end connects the transducer input SNS of battery pack BAT negative pole and integrated circuit U2, another termination common point ground.

5. according to the described intelligent charge battery module of claim 1, it is characterized in that: the battery surface in described batteries (1) is glued with negative tempperature coefficient thermistor NTC, the end of this resistance NTC connects battery pack BAT negative pole, the other end is connected to the series connection point of resistance R T1 and RT2, and be connected to the temperature sensing input TS of integrated circuit U2 through resistance R T from this point, and between this TS end and battery pack BAT negative pole cross-over connection capacitor C T, constitute the temperature sensing circuit of battery pack BAT thus.

6. according to the described intelligent charge battery module of claim 1, it is characterized in that: the positive pole of batteries BAT is after series connection positive temperature coefficient resistor PTC, connect the negative electrode of second tube sheet D2 and the end of resistance R B1, and draw from this point of contact and to be connected to the load mobile phone, constitute the over-current protection circuit of battery pack BAT thus.

7. according to the described intelligent charge battery module of claim 1, it is characterized in that: described shell bottom surface has the battery pack negative pole to draw the contact (5) of drawing behind contact (3), the battery anode series connection positive temperature coefficient resistor PTC, and from contact (4) that thermistor one end is drawn.