CN2674659Y - Combined battery with electric quantity display and protective circuit - Google Patents
Combined battery with electric quantity display and protective circuit Download PDFInfo
- Publication number
- CN2674659Y CN2674659Y CN 200320127806 CN200320127806U CN2674659Y CN 2674659 Y CN2674659 Y CN 2674659Y CN 200320127806 CN200320127806 CN 200320127806 CN 200320127806 U CN200320127806 U CN 200320127806U CN 2674659 Y CN2674659 Y CN 2674659Y
- Authority
- CN
- China
- Prior art keywords
- chip
- pin
- effect transistor
- field effect
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y02E60/12—
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a combined battery with electric quantity display and a protective circuit, comprising a battery pack which consists of two rechargeable batteries connected in series, a voltage detecting circuit, and the battery protective circuit. The voltage detecting circuit consists of a R3111N chip and a light-emitting diode. The battery protective circuit consists of an M1292 chip, a battery charging protective field effect transistor Q2, and a discharge preventive field effect transistor Q1. Because of the voltage detecting circuit and the battery protective circuit which are arranged in the combined battery of the utility model, the combined battery can be real-time monitored. On one hand, the utility model can help the users know the electric quantity of the combined battery at any time. On the other hand, the battery can be protected from the breakage owing to over-charge, over-discharge, or shortage of voltage.
Description
Technical field
The utility model relates to a kind of assembled battery, especially a kind of have overcharge, overcurrent, under-voltage protecting circuit and the assembled battery that can show battery electric quantity.
Background technology
At present, mobile electronic product has obtained the increasingly extensive use of people.But, because the energy of the battery that mobile electronic product self is entrained is extremely limited, make and be subjected to service time of mobile electronic product certain restriction, therefore, the portable rechargeable battery pack (also can be described as assembled battery) of electric power energy has appearred can carrying and can providing for multiple mobile electronic product.
At present the assembled battery that uses just carries out some single batteries simple series and parallel combination, and the user can't be to the storage capacitors amount of this assembled battery, thereby makes troubles for using to a certain extent.For example, when carrying video camera and go out to take,, therefore can't estimate the service time continuously of this assembled battery, the continuity of shooting operation is affected owing to can't learn the stored electric weight of assembled battery that carries.
In addition; when assembled battery adopts some chargeable lithium ion batteries to carry out the serial or parallel connection combination; in the charge/discharge course of work of assembled battery, can't get information about the electric weight storage condition in the battery pack; simultaneously; when occur overcharging, when overcurrent and under-voltage phenomenon, the user can't know in time that also these situations more can't take the measure of protecting battery not suffer damage.
If assembled battery uses under the guard mode not having for a long time, shortened in its life-span greatly.And then cause comparatively serious waste to the user.
In sum, for mobile electronic product provides the assembled battery that can show electric weight and have defencive function, prolonging the useful life of assembled battery, is insider's problem demanding prompt solution.
The utility model content
The purpose of this utility model is to provide a kind of assembled battery with electric weight demonstration and protective circuit at the existing deficiency of the assembled battery of present use; this assembled battery inside is provided with automatic monitoring and protecting circuit; not only can show its capacitance at any time; can also in the charge or discharge use, occur overcharging to battery pack, when overcurrent, under-voltage phenomenon; take safeguard measure timely, avoid the damage of battery.
The utility model is achieved through the following technical solutions:
A kind of assembled battery with electric weight demonstration and protective circuit, it comprises the battery pack that is composed in series by two joint rechargeable batteries, also is provided with voltage detecting circuit, battery protecting circuit in this assembled battery.
Voltage detecting circuit comprises R3111N chip and light-emitting diode, and the 2nd pin of this chip connects the positive pole of described battery pack, and the 1st pin is connected with the negative pole of described battery pack by light-emitting diode.
Battery protecting circuit comprises M1292 chip, charge protection field effect transistor Q
2And discharge prevention field effect transistor Q
1The 8th pin of M1292 chip is connected with the positive pole of battery pack, and its 6th pin is connected with the serial connection point of two joint rechargeable batteries.
Charge protection field effect transistor Q
2Grid be connected with the collector electrode that base stage is connected the NPN switching tube Q of described M1292 chip the 1st pin, its source electrode is connected with the emitter of this NPN switching tube Q, and ground connection simultaneously.Charge protection field effect transistor Q
2Drain electrode and described discharge prevention field effect transistor Q
1Drain electrode connect.The base stage of described NPN switching tube Q is passed through resistance R
6Be connected with its emitter.
Discharge prevention field effect transistor Q
1Grid be connected with described M1292 chip the 2nd pin, its source electrode is connected with the negative pole of described battery pack.
The 7th pin of M1292 chip and discharge prevention field effect transistor (Q
1) drain electrode connect and discharge prevention field effect transistor (Q
1) source electrode be connected with the 4th pin of described M1292 chip.
The 8th pin of M1292 chip, the 6th pin are respectively applied for the voltage that detects two batteries, and NPN switching tube Q controls charge protection field effect transistor Q by the state of the 1st pin of M1292 chip
2Conducting or end, assembled battery is granted asylum in charging process.Discharge prevention field effect transistor Q
1Conducting or end under the control of M1292 chip the 2nd pin provides protection in the discharge process to assembled battery.
The 7th pin of M1292 chip and the 4th pin detect discharge prevention field effect transistor (Q
1) drain electrode and the voltage between the source electrode, the assembled battery when being in over-current state provides protection.
R3111N chip in the voltage detecting circuit is provided with a reference voltage, is used for cell voltage is compared measurement, and when cell voltage was higher than this reference voltage, R3111N chip drives light-emitting diode was in order to the electric weight of expression battery.Accurately can adopt a plurality of voltage detecting circuits to measure for the electric weight demonstration that makes assembled battery is more careful, make the reference voltage of the R3111N chip in all voltage detecting circuits all inequality, and its 2nd pin connect all and is connected with the positive pole of described battery pack.
In addition, the 2nd pin of the R3111N chip in the voltage detecting circuit can also be passed through a common switch K
1Be connected with the positive pole of described battery pack.In the time need measuring, with common switch K to the electric weight of assembled battery
1Closure, voltage detecting circuit is switched on.When not needing to detect electric weight, cut off common switch K
1, reduce consumption of electric.
As shown from the above technical solution: the utility model is by being provided with voltage detecting circuit and battery protecting circuit respectively in assembled battery; can be to assembled battery to monitor in real time; can help the user to understand the reserves situation of electric weight in the assembled battery constantly on the one hand; can protect battery on the other hand, make its not can because of overcharge, mistake is put or under-voltage phenomenon causes damage.
Description of drawings
Fig. 1 is a schematic block circuit diagram provided by the utility model;
Fig. 2 provides the voltage detecting circuit schematic diagram of preferred embodiment for the utility model;
Fig. 3 provides the battery protecting circuit schematic diagram of preferred embodiment for the utility model.
Embodiment
Below, also in conjunction with the accompanying drawings the utility model is described in further detail by circuit theory and a preferred embodiment.
As shown in Figure 1, the utility model comprises the battery pack BAT that is composed in series by two joint rechargeable batteries, also is provided with voltage detecting circuit, battery protecting circuit in this assembled battery.
That voltage detecting circuit comprises the R3111N chip and light-emitting diode D, this chip monitoring side is connected with the positive pole of battery pack BAT, and drive end is connected to the negative pole of battery pack BAT by light-emitting diode.
Battery protecting circuit comprises M1292 chip, charge protection field effect transistor Q
2And discharge prevention field effect transistor Q
1Charge protection field effect transistor Q
2Be used for assembled battery is carried out over-charge protective; Discharge prevention field effect transistor Q
1Be used for when discharging, providing overdischarge and under-voltage protection to assembled battery.
The voltage detecting circuit schematic diagram of the preferred embodiment that the utility model provides as shown in Figure 2
Among Fig. 2, by R3111N341C chip and light-emitting diode D
1Form a voltage detecting circuit.The 2nd pin of R3111N341C chip is by a common switch K
1Meet the anodal V of battery pack, its 1st pin is by light-emitting diode D
1Be connected with the negative pole B of battery pack.
Utilize R3111N351C chip, R3111N371C chip, R3111N381C chip and light-emitting diode D again
2, D
3, D
4Can form three voltage detecting circuits similar more respectively, and with four circuit parallel connections, the 2nd pin of all chips all passes through a common switch K to foregoing circuit
1Meet the anodal V of battery pack; The 1st pin of all chips all is connected with the negative pole B of battery pack by light-emitting diode.
The reference voltage difference of above-mentioned four chips, and according to the rising one by one that puts in order.When the voltage of assembled battery reached any one reference voltage, the connected light-emitting diode conducting of the pairing chip drives of this reference voltage was luminous, thereby externally showed the electric weight of assembled battery.The user can be by the common switch K in the foregoing circuit when detecting electric weight
1, circuit is connected, when not needing to detect, close common switch K
1Reach purpose of power saving.
The battery protecting circuit schematic diagram of present embodiment is referring to shown in Figure 3.
Battery protecting circuit is mainly by M1292 chip, charge protection field effect transistor Q
2And discharge prevention field effect transistor Q
1Form.
The 8th pin of M1292 chip (corresponding VH--VL end) is connected with the anodal V of battery pack through resistance, and its 6th pin (corresponding VL-GND) end is connected a V that is connected in series of two joint rechargeable batteries
1On.
The 1st pin of M1292 chip is connected to ground by a component piezoresistance R5, resistance R 6.Be connected with the base stage of NPN switching tube Q between resistance R 5, the resistance R 6.Charge protection field effect transistor Q
2Grid be connected with the collector electrode of NPN switching tube Q, its source electrode is connected with the emitter of this NPN switching tube Q, and ground connection simultaneously.Charge protection field effect transistor Q
2Drain electrode and discharge prevention field effect transistor Q
1Drain electrode connect.Discharge prevention field effect transistor Q
1Grid be connected with M1292 chip the 2nd pin, its source electrode is connected with the negative pole B of battery pack.
In the process of charging normal, the 1st pin of M1292 chip (OC end) is a high-impedance state, and NPN switching tube Q is ended, at this moment charge protection field effect transistor Q
2Grid be high level, be in the normally state.When the voltage that detects the single-unit rechargeable battery when the 8th pin of M1292 chip (corresponding VH--VL end) or the 6th pin (corresponding VL-GND) surpassed 4.35V, the 1st pin (OC end) became low level, and NPN switching tube Q conducting makes charge protection field effect transistor Q
2Grid be low level, this moment charge protection field effect transistor Q
2By finishing over-charge protective.
Assembled battery is in regular picture, and the 7th pin of M1292 chip (corresponding CS end) detects discharge prevention field effect transistor Q with the 4th pin (corresponding GND end)
1Drain electrode and the pressure drop between the source electrode when being lower than 0.15V, the 2nd pin of M1292 chip (corresponding GD end) output high level drives discharge prevention field effect transistor Q
1Normally.When the 7th pin of M1292 chip detects discharge prevention field effect transistor Q
1When the pressure drop between drain electrode and the source electrode surpassed 0.15V, the 2nd pin of M1292 chip output high level drove discharge prevention field effect transistor Q
1By finishing overcurrent protection.
In addition; be in the operate as normal at assembled battery; when the voltage that the 8th pin of M1292 chip (corresponding VH--VL end) or the 6th pin (corresponding VL-GND) detect the single-unit rechargeable battery was higher than under-voltage monitoring criteria voltage (2.4V), the 2nd pin (corresponding GD end) output high level made discharge prevention field effect transistor Q
1Normally, when the voltage that detects the single-unit rechargeable battery was lower than 2.4V, the 2nd pin output low level made discharge prevention field effect transistor Q
1End, thereby carry out under-voltage protection.
It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1, a kind of assembled battery with electric weight demonstration and protective circuit, it comprises the battery pack that is composed in series by two joint rechargeable batteries, it is characterized in that: it also comprises voltage detecting circuit, battery protecting circuit;
Described voltage detecting circuit comprises R3111N chip and light-emitting diode, and the 2nd pin of this chip connects the positive pole of described battery pack, and its 1st pin is connected with the negative pole of described battery pack by light-emitting diode;
Described battery protecting circuit comprises M1292 chip, charge protection field effect transistor (Q
2) and discharge prevention field effect transistor (Q
1); The 8th pin of described M1292 chip is connected with the positive pole of described battery pack, and its 6th pin is connected with the serial connection point of described two joint rechargeable batteries;
Described charge protection field effect transistor (Q
2) grid be connected with the collector electrode that base stage is connected to the NPN switching tube (Q) of described M1292 chip the 1st pin, its source electrode is connected with the emitter of this NPN switching tube (Q), and ground connection simultaneously; Described charge protection field effect transistor (Q
2) drain electrode and described discharge prevention field effect transistor (Q
1) drain electrode connect; The base stage of described NPN switching tube (Q) is by resistance (R
6) be connected with its emitter;
Described discharge prevention field effect transistor (Q
1) grid be connected with described M1292 chip the 2nd pin, its source electrode is connected with the negative pole of described battery pack.
The 7th pin of described M1292 chip and described discharge prevention field effect transistor (Q
1) drain electrode connect and discharge prevention field effect transistor (Q
1) source electrode be connected with the 4th pin of described M1292 chip.
2, the assembled battery with electric weight demonstration and protective circuit according to claim 1; it is characterized in that: described voltage detecting circuit is more than one; the reference voltage of the R3111N chip in all voltage detecting circuits is all inequality; and its 2nd pin all is connected with the positive pole of described battery pack.
3, the assembled battery with electric weight demonstration and protective circuit according to claim 1 and 2, it is characterized in that: the 2nd pin of the R3111N chip in the described voltage detecting circuit is also by common switch (K
1) be connected with the positive pole of described battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320127806 CN2674659Y (en) | 2003-12-17 | 2003-12-17 | Combined battery with electric quantity display and protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320127806 CN2674659Y (en) | 2003-12-17 | 2003-12-17 | Combined battery with electric quantity display and protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2674659Y true CN2674659Y (en) | 2005-01-26 |
Family
ID=34477032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320127806 Expired - Fee Related CN2674659Y (en) | 2003-12-17 | 2003-12-17 | Combined battery with electric quantity display and protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2674659Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872736A (en) * | 2014-03-24 | 2014-06-18 | 华南师范大学 | Protected charging circuit capable of displaying electric quantity |
-
2003
- 2003-12-17 CN CN 200320127806 patent/CN2674659Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872736A (en) * | 2014-03-24 | 2014-06-18 | 华南师范大学 | Protected charging circuit capable of displaying electric quantity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1165103C (en) | Automatic equalizing charging device for series-connected battery set | |
| CN102709980A (en) | Protective plate for series lithium battery pack based on battery protective chip | |
| CN1808834A (en) | Systems and methods for regulating pre-charge current in a battery system | |
| CN101075667A (en) | Lithium-cell protector and its protection | |
| CN112736304A (en) | Power supply management system | |
| CN1315239C (en) | Battery with equalizing charge controlling circuit | |
| CN102231516B (en) | Battery protection board, power battery and power battery pack | |
| CN201234123Y (en) | Battery protection circuit and battery pack module | |
| CN2674659Y (en) | Combined battery with electric quantity display and protective circuit | |
| CN211556857U (en) | Gear adjusting protection circuit applied to master-slave motor | |
| CN202309041U (en) | Floating charge protective circuit | |
| CN2598788Y (en) | Lithium secondary battery charge-discharge management device for driving electric vehicle | |
| CN2824320Y (en) | Intelligent cell pack | |
| CN200947197Y (en) | External battery for notebook computer | |
| CN218675240U (en) | Lithium battery comprehensive test equipment with multifunctional protection | |
| CN2612082Y (en) | Rechargeable battery pack | |
| CN114243813B (en) | Lithium battery pack voltage stabilizing and balancing control system and method | |
| CN201975841U (en) | Multifunctional intelligent charger | |
| CN212343363U (en) | Lithium battery pack capable of realizing single-section discharge protection | |
| CN202150694U (en) | Battery protective board, power battery, and power battery pack | |
| CN101098074A (en) | Multi-section lithium ion battery pack protection circuit | |
| CN201069797Y (en) | 9V lithium ion battery | |
| CN202797905U (en) | Battery protection plate having line break protection function | |
| CN202353191U (en) | Protection device with multiple metal oxide semiconductor (MOS) transistors | |
| CN202218007U (en) | Power lithium ion battery protective circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |