CN1533006A - Battery discharge protective regulating circuit - Google Patents
Battery discharge protective regulating circuit Download PDFInfo
- Publication number
- CN1533006A CN1533006A CNA031158692A CN03115869A CN1533006A CN 1533006 A CN1533006 A CN 1533006A CN A031158692 A CNA031158692 A CN A031158692A CN 03115869 A CN03115869 A CN 03115869A CN 1533006 A CN1533006 A CN 1533006A
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- circuit
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- battery
- effect transistor
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Abstract
This invention relates to a circuit for protecting batteries under voltage, overcurrent, or load short circuit or regulating output voltage which is connected in series with a fieldistor controlled by a sample control circuit composed of a triode, a Zener diode, a current sampling resistor and an integral delay circuit to switch off the discharge circuit to protect the battery when the under voltage, overcurrent or load short circuit happen and to regulate output voltage by forward connecting in series a commutation diode. The protection part uses 8 separating elements to reduce cost of the protection circuit and space.
Description
Affiliated technical field
The present invention relates to the DC power supply protection and adjust circuit, particularly battery discharge is carried out the circuit of self-protection and output voltage adjustment.
Technical background
The repeated charge technology of battery advances all the time, particularly chargeable lithium battery is the just ripe in recent years up-to-date technology that gets up, because chargeable lithium battery unit mass energy density height, in light weight and repeated charge often, so be widely used in hand-held computer, digital camera, up-to-date technology fields such as roam-a-phone.But the lithium battery service condition is relatively harsher; must there be discharge protection circuit that it is protected in discharge process; and its circuit design is complicated; usually all contain voltage reference circuit; the operational amplifier comparison circuit; analog to digital conversion circuit; logic gates; drive circuit; oscillating circuit; clock circuit, the circuit that generally adopts integrated circuit to add the peripheral cell formation is at present protected (as the li-ion cell protection chip si9730 of one of maximum in the world semiconductor and passive device manufacturer vishay company) to lithium battery.Circuit cost is higher and inconvenience is installed, and is unfavorable for being widely used on other household electrical appliance.
Summary of the invention
A kind of battery discharge prevention circuit provided by the invention; only use 8 resolution elements can realize battery over-discharge (under-voltage, overcurrent, the load short circuits) situation that occurs in the battery discharge procedure is protected; under the situation that increases rectifier diode, then can adjust output voltage simultaneously.
This circuit is connected in series field effect transistor in discharge loop; field effect transistor is subjected to by triode and voltage stabilizing didoe, and the control of the sampling control circuit that current sampling resistor and integrator delay-time circuit constitute is under-voltage at battery; disconnect discharge loop under the situation of overcurrent or load short circuits, battery is protected.By the serial connection of forward in discharge loop rectifier diode, introduce the voltage drop of PN junction, adjust output voltage.
The invention has the beneficial effects as follows and to reduce the battery protecting circuit cost, dwindle the shared space of protective circuit and be easy to install and use.
Description of drawings
Below in conjunction with drawings and Examples battery discharge protection being adjusted circuit further specifies
Fig. 1 is the schematic diagram that battery discharge protection is adjusted circuit
Fig. 2 is to use the equivalent circuit diagram of P-channel field-effect transistor (PEFT) pipe and NPN triode
Among Fig. 1, the negative pole of battery (B2) links to each other with an end of current sampling resistor (R4), the other end of current sampling resistor (R4) links to each other with the source electrode (s) of field effect transistor (F), the grid of field effect transistor (g) is connected to the collector electrode (c) of triode (T), the collector electrode (c) of triode (T) links to each other with an end of resistance R 2 again, the other end of resistance (R2) links to each other with the negative pole of battery (B2), the emitter (e) of triode (T) links to each other with battery (B1) is anodal, the base stage (b) of triode (T) links to each other with the negative pole of voltage-stabiliser tube (Z), the positive pole of voltage-stabiliser tube (Z) links to each other with an end of resistance (R1) again, the other end of resistance (R1) links to each other with the negative pole of battery (B2), electric capacity (C) and resistance (R3) polyphone, the other end of electric capacity (C) links to each other with the negative pole of battery (B2), and the other end of resistance (R3) links to each other with the drain electrode (d) of field effect transistor (F), the tie point (p1) of voltage-stabiliser tube (Z) and resistance (R1) links to each other with the tie point (p2) of electric capacity (C) and resistance (R3) again, and the negative pole of battery (B1) links to each other with battery (B2) is anodal.
The terminal voltage of battery (V) is applied on the voltage-stabiliser tube (Z) by the forward PN junction eb of triode (T), to voltage-stabiliser tube (Z), be applied with a reverse voltage, when cell voltage just often, the terminal voltage of battery (V) is higher than the reverse breakdown voltage of voltage-stabiliser tube (Z), voltage-stabiliser tube (Z) is in the puncture conducting state, the base stage (b) of triode (T) has electric current to pass through, then conducting between the emitter (e) of triode (T) and the collector electrode (c), electric current produces pressure drop at resistance (R2), form high potential, the grid of field effect transistor (g) makes conducting between drain electrode and the source electrode because of being in high potential, thereby makes discharge loop be in conducting state; When battery in discharge process because of energy loss, terminal voltage (V) drops to the reverse breakdown voltage that is lower than voltage-stabiliser tube (Z), then voltage-stabiliser tube (Z) enters cut-off state by puncturing conducting state, the base stage (b) of triode (T) does not have electric current to pass through, end between the emitter (e) of triode (T) and the collector electrode (c), there is not electric current to flow through on the resistance (R2), and (R2) link to each other with the negative pole of battery, then (R2) two ends all are electronegative potential, the grid of field effect transistor (g) because of be in electronegative potential make the drain electrode and source electrode between end, thereby make discharge loop be in cut-off state, battery can't further discharge, and makes the battery can overdischarge and damage.
When in discharge process, if short circuit appears in load or unusual big electric current flows through load, then big electric current flows through field effect transistor (F) and current sampling resistor (R4), drain electrode (d) current potential of field effect transistor (F) raises rapidly, and pass through resistance (R3) electric capacity (C) is charged, then the current potential of electric capacity (C) on (p2) progressively rises, owing to (p1) link to each other with (p2), and (p1) be connected in the positive pole of voltage-stabiliser tube (Z), the current potential of the positive pole of voltage-stabiliser tube (Z) also progressively rises, thereby be directed at and be added in voltage-stabiliser tube (Z) reverse voltage and progressively descend, reach the value that sets by resistance (R4) when electric current, and through the time-delay of resistance (R3) with the integrating circuit of electric capacity (C) composition, the reverse voltage that is added on the voltage-stabiliser tube (Z) just drops to the reverse breakdown voltage that is lower than voltage-stabiliser tube (Z), then voltage-stabiliser tube (Z) enters cut-off state by puncturing conducting state, the base stage (b) of triode (T) does not just have electric current to pass through, end between the emitter (e) of triode (T) and the collector electrode (c), there is not electric current to flow through on the resistance (R2), and R2 links to each other with the negative pole of battery, then (R2) two ends all are electronegative potential, the grid of field effect transistor (g) because of be in electronegative potential make the drain electrode and source electrode between end, thereby make discharge loop be in cut-off state, battery can't further discharge, and makes the battery can overdischarge and damage.
When in discharge loop, sealing in the rectifier diode (D1 that forward connects, D2, D3), then electric current can form the PN junction junction voltage at the PN junction of each rectifier diode, output voltage will become the PN junction junction voltage (quantity of the rectifier diode that output voltage=battery terminal voltage one forward PN junction junction voltage x connects) that is deducted each rectifier diode by the terminal voltage of battery, the quantity of the rectifier diode that the forward that is connected in series by change connects just can obtain different output voltages.
Claims (4)
1. a battery discharge protection is adjusted circuit, an output electrode serial connection field effect transistor of battery, the taken a sample control of control circuit of the grid of field effect transistor, conducting or disconnect discharge loop under voltage of setting or electric current.The base stage serial connection voltage stabilizing didoe and the resistance of the triode in the control circuit is characterized in that taking a sample; On field effect transistor and the current sampling resistor and connect the integrating circuit that is connected in series by electric capacity and resistance; String has rectifier diode in discharge loop.
2. according to claim 1ly contain the cell apparatus that circuit is adjusted in protection, it is characterized in that the voltage stabilizing didoe in the sample circuit and the base stage of current-limiting resistance serial connection triode, voltage-stabiliser tube is in and punctures or cut-off state.
3. the cell apparatus that contains protection adjustment circuit according to claim 1; it is characterized in that on the field effect transistor of discharge loop and current sampling resistor and connect the integrating circuit that constitutes by electric capacity and resistance polyphone that the size of current that will flow through field effect transistor and current sampling resistor reflects with the form of voltage height on electric capacity.
4. according to claim 1ly contain the cell apparatus that circuit is adjusted in protection, it is characterized in that the rectifier diode that string has forward to connect in the discharge loop, the voltage of battery output is adjusted in the mode of the quantity of the diode PN junction that increases discharge loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031158692A CN1533006A (en) | 2003-03-18 | 2003-03-18 | Battery discharge protective regulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031158692A CN1533006A (en) | 2003-03-18 | 2003-03-18 | Battery discharge protective regulating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1533006A true CN1533006A (en) | 2004-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031158692A Pending CN1533006A (en) | 2003-03-18 | 2003-03-18 | Battery discharge protective regulating circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN1533006A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728841A (en) * | 2008-10-13 | 2010-06-09 | 三美电机株式会社 | Battery case |
| CN102017274A (en) * | 2008-04-23 | 2011-04-13 | 罗伯特.博世有限公司 | Energy storage |
| CN102570408A (en) * | 2011-12-31 | 2012-07-11 | 南京德朔实业有限公司 | Over-discharge protection circuit for lithium battery |
| CN103701101A (en) * | 2013-12-14 | 2014-04-02 | 苏州市博得立电源科技有限公司 | Circuit structure for improving short-circuit protection performance of large-sized battery pack by using capacitor |
| CN104184127A (en) * | 2013-05-24 | 2014-12-03 | 鸿富锦精密工业（深圳）有限公司 | Battery protection circuit |
| CN108418184A (en) * | 2018-04-16 | 2018-08-17 | 天津爱玛车业科技有限公司 | discharge detection circuit and system |
| CN110661313A (en) * | 2019-09-26 | 2020-01-07 | 宁夏电通物联网科技股份有限公司 | Window voltage control storage battery discharge protection circuit based on discrete component |
| CN111247708A (en) * | 2017-10-13 | 2020-06-05 | 伯斯有限公司 | Battery protection system and method |
| CN111864819A (en) * | 2019-04-30 | 2020-10-30 | 松下电气机器（北京）有限公司 | Control device and method for storage battery |
| CN115603275A (en) * | 2022-09-08 | 2023-01-13 | 英业达科技有限公司（Cn） | Electronic fuse type protection circuit system and electronic fuse type protection circuit thereof |
-
2003
- 2003-03-18 CN CNA031158692A patent/CN1533006A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102017274A (en) * | 2008-04-23 | 2011-04-13 | 罗伯特.博世有限公司 | Energy storage |
| CN101728841A (en) * | 2008-10-13 | 2010-06-09 | 三美电机株式会社 | Battery case |
| CN102570408A (en) * | 2011-12-31 | 2012-07-11 | 南京德朔实业有限公司 | Over-discharge protection circuit for lithium battery |
| CN104184127A (en) * | 2013-05-24 | 2014-12-03 | 鸿富锦精密工业（深圳）有限公司 | Battery protection circuit |
| CN104184127B (en) * | 2013-05-24 | 2018-09-11 | 鸿富锦精密工业（深圳）有限公司 | Battery protecting circuit |
| CN103701101A (en) * | 2013-12-14 | 2014-04-02 | 苏州市博得立电源科技有限公司 | Circuit structure for improving short-circuit protection performance of large-sized battery pack by using capacitor |
| CN111247708A (en) * | 2017-10-13 | 2020-06-05 | 伯斯有限公司 | Battery protection system and method |
| CN108418184A (en) * | 2018-04-16 | 2018-08-17 | 天津爱玛车业科技有限公司 | discharge detection circuit and system |
| CN111864819A (en) * | 2019-04-30 | 2020-10-30 | 松下电气机器（北京）有限公司 | Control device and method for storage battery |
| CN110661313A (en) * | 2019-09-26 | 2020-01-07 | 宁夏电通物联网科技股份有限公司 | Window voltage control storage battery discharge protection circuit based on discrete component |
| CN110661313B (en) * | 2019-09-26 | 2023-06-02 | 宁夏电通物联网科技股份有限公司 | Window voltage control storage battery discharge protection circuit based on discrete component |
| CN115603275A (en) * | 2022-09-08 | 2023-01-13 | 英业达科技有限公司（Cn） | Electronic fuse type protection circuit system and electronic fuse type protection circuit thereof |
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