CN105449827A - Double-battery switching circuit based on IGBT - Google Patents
Double-battery switching circuit based on IGBT Download PDFInfo
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- CN105449827A CN105449827A CN201510847698.5A CN201510847698A CN105449827A CN 105449827 A CN105449827 A CN 105449827A CN 201510847698 A CN201510847698 A CN 201510847698A CN 105449827 A CN105449827 A CN 105449827A
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Abstract
The invention discloses a double-battery switching circuit based on IGBT, comprising two batteries which are connected in series, two short circuit switches which are connected to the corresponding batteries in parallel, and two short circuit control circuits which are coupled with the corresponding batteries in parallel, wherein each short circuit control circuit receives the voltage on two ends of the corresponding batteries and provides control signals according to the voltage on two ends of the corresponding battery in order to conduct or disconnect the corresponding short circuit switch; the short circuit control circuit comprises a comparator having a forward input terminal, a reverse input terminal and an output terminal, and a bias circuit having a positive terminal and a negative terminal, wherein the positive terminal is coupled to the forward input terminal of the comparator; the battery and the short circuit switch is coupled between the forward input terminal of the comparator and the negative terminal of the bias circuit; and the short circuit switch comprises a control terminal coupled to the output terminal of the comparator. The double-battery switching circuit based on the IGBT performs short circuit on the battery which is depleted or damaged in the battery unit and thus extends the usage time of the battery unit.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of battery.
Background technology
Battery (Battery) refers to fill electrolyte solution and metal electrode with the segment space of the cup of generation current, groove or other containers or clad vessel, chemical energy can be become the device of electric energy, have positive pole, negative pole point.Along with the progress of science and technology, battery general reference can produce the midget plant of electric energy, as fuel cell, dry cell, lead accumulator, solar cell.Utilize battery as energy source, can obtain that there is burning voltage, stabling current, long-time stable is powered, by the electric current that ectocine is very little, and battery structure is simple, easy to carry, discharge and recharge is easy to operation, is not subject to the impact of outside climatic and temperature, stable and reliable for performance, the various aspects in modern society's life play great role.
Fuel cell is a kind of device chemical energy of fuel directly being changed into electric energy through electrochemical reaction.Fuel cell is that what to utilize hydrogen to carry out at anode is oxidation reaction, hydrogen-oxygen is changed into hydrogen ion, and oxygen carries out reduction reaction at negative electrode, is combined generates water with the hydrogen ion transmitted by anode, just can generation current in redox reaction process.Fuel cell comprises alkaline fuel cell (AFC), phosphoric acid fuel cell (PAFC), Proton Exchange Membrane Fuel Cells (PEMFC), molten carbonate fuel cell (MCFC), solid-oxide fuel cell (SOFC), and direct methanol fuel cell (DMFC) etc.
Conventional a kind of dry cell is carbon-zinc dry cell, negative pole is the cylinder that zinc does, inside have ammonium chloride as electrolyte, the paste electrolyte of a small amount of zinc chloride, inert filler and water furnishing, positive pole is the carbon-point that surrounding wraps up in be mixed with the paste electrolyte of manganese dioxide.Electrode reaction is: negative pole place zinc atom becomes zinc ion (Zn++), disengages electronics, and positive pole place ammonium ion (NH4+) obtains electronics and becomes ammonia and hydrogen, and drive away hydrogen to eliminate polarization with manganese dioxide, electromotive force is about 1.5 volts.
Fuel cell is a kind of device chemical energy that fuel discharges in combustion being directly changed into electric energy.With storage battery difference, be that it can from outside respectively to two electrode zones postcombustion and oxidant and do not need charging continuously.Fuel cell is made up of four parts such as fuel (such as hydrogen, methane etc.), oxidant (such as oxygen and air etc.), electrode and electrolyte, and its electrode has catalytic performance, and is loose structure, to ensure larger active area.During work, fuel is passed into negative pole, oxidant passes into positive pole, carries out electrochemical reaction to obtain electric energy under the catalysis of their each comfortable electrodes.
Lead accumulator is the most conventional, and its pole plate is the grid made with lead alloy, and electrolyte is dilute sulfuric acid, two-plate is all coated with lead sulfate, but after charging, on positive pole place pole plate, lead sulfate is transformed into brown lead oxide, negative pole place lead sulfate is transformed into metallic lead, during electric discharge, then reciprocal chemical reaction occurs.
The stable operating voltage of lead accumulator, serviceability temperature and use current range wide, can discharge and recharge hundreds of circulations, shelf characteric good (being particularly suited for dry battery unit storage), cost lower, be thus widely used.Adopt NEW Pb alloy and electrolyte to add nano carbon sol, the performance of lead accumulator can be improved.As made grid with lead-calcium alloy, the minimum floating current of lead accumulator can be ensured, reduce and add the water yield and extend its useful life; Adopt plumbous lithium alloy to cast positive grid, then can reduce self discharge and meet the needs sealed.In addition, open type lead accumulator progressively will change sealed type into, and develops acid-proof, explosion-proof type and the hydrogen formula lead accumulator that disappears.
The electromotive force of lead accumulator is about 2 volts, and conventional series system forms the batteries of 6 volts or 12 volts.During battery discharge, sulfuric acid concentration reduces, and can judge whether storage battery can terminate the need of charging or charging process by the method surveying electrolyte density.When the advantage of lead accumulator is electric discharge, electromotive force is more stable, and shortcoming is that specific energy (Unit Weight institute electric power storage energy) is little, strong to corrosiveness of the environment.
Battery pack generally comprises the battery that multi-section serial connects, but when a certain joint in battery pack or a few batteries power depletion or when damaging, the resistance of this battery will become very large.If continue to be connected in series to system power supply with other normal battery, this battery by lot of energy, thus reduces efficiency, shortens the service time of battery pack.
Summary of the invention
The present invention proposes a kind of double cell commutation circuit based on IGBT, and when solving a certain joint or a few batteries power depletion in existing battery pack or damage, the resistance of this battery will become very large problem.
Technical scheme of the present invention is achieved in that
Based on a double cell commutation circuit of IGBT, comprising: 2 batteries be connected in series; 2 shorting switchs be connected in parallel with respective battery; And with 2 short circuit control circuits of respective battery coupled in parallel, wherein said each short circuit control circuit receives respective battery both end voltage, and provides control signal according to respective battery both end voltage, in order to be turned on or off by corresponding shorting switch; Described short circuit control circuit comprises: comparator, has in-phase input end, inverting input and output; Biasing circuit, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparator; Wherein said battery and shorting switch coupled in parallel are between the in-phase input end and the negative terminal of biasing circuit of comparator, and described shorting switch comprises the control end being coupled to described comparator output terminal; Described shorting switch is igbt transistor.
The invention has the beneficial effects as follows:
The battery that in short circuit battery pack, electricity exhausts or damages, extends the service time of battery pack.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the control circui block diagram of a kind of double cell commutation circuit based on IGBT of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of double cell commutation circuit based on IGBT of the present invention, battery pack 117 comprises 2 batteries be connected in series (211,221); 2 shorting switchs (212,222) be connected in parallel with respective battery; And with 2 short circuit control circuits (213,223) of respective battery coupled in parallel, described each short circuit control circuit receives respective battery both end voltage, and provide control signal according to respective battery both end voltage, in order to corresponding shorting switch is turned on or off, thus when respective battery both end voltage is very low by this battery short circuit.
Short circuit control circuit (213,223) structure in Fig. 1 is identical.
Short circuit control circuit 213 comprises: comparator 2101, has in-phase input end, inverting input and output; Biasing circuit 2102, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparator 2101; Wherein battery 211 and shorting switch 212 coupled in parallel are between the in-phase input end and the negative terminal of biasing circuit 102 of comparator 2101, and described shorting switch 212 comprises the control end being coupled to described comparator 2101 output.
When described battery voltage short circuit control circuit 213 runs, comparator 2101 compares the voltage that its battery 211 both end voltage and biasing circuit 2102 provide.
When power depletion or the damage of battery 211, during the voltage levvl that its both end voltage is provided lower than biasing circuit 2102, comparator 2101, by shorting switch 212 conducting, with battery 211, thus minimizes the resistance of this battery path.
Preferably, described shorting switch is igbt transistor.
IGBT (InsulatedGateBipolarTransistor), insulated gate bipolar transistor, the compound full-control type voltage driven type power semiconductor be made up of BJT (double pole triode) and MOS (insulating gate type field effect tube), has the advantage of the high input impedance of MOSFET and low conduction voltage drop two aspect of GTR concurrently.IGBT combines the advantage of above two kinds of devices, and the little and saturation pressure of driving power reduces, and being applicable to very much being applied to direct voltage is that 600V and above converter system are as fields such as alternating current machine, frequency converter, Switching Power Supply, lighting circuit, Traction Drives.
Double cell commutation circuit based on IGBT of the present invention, the battery that in short circuit battery pack, electricity exhausts or damages, extends the service time of battery pack.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. based on a double cell commutation circuit of IGBT, it is characterized in that, comprising: 2 batteries be connected in series;
2 shorting switchs be connected in parallel with respective battery, described shorting switch is igbt transistor;
And with 2 short circuit control circuits of respective battery coupled in parallel, wherein said each short circuit control circuit receives respective battery both end voltage, and provides control signal according to respective battery both end voltage, in order to be turned on or off by corresponding shorting switch;
Described short circuit control circuit comprises: comparator, has in-phase input end, inverting input and output;
Biasing circuit, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparator;
Wherein, described battery and shorting switch coupled in parallel are between the in-phase input end and the negative terminal of biasing circuit of comparator, and described shorting switch comprises the control end being coupled to described comparator output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510847698.5A CN105449827A (en) | 2015-11-27 | 2015-11-27 | Double-battery switching circuit based on IGBT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510847698.5A CN105449827A (en) | 2015-11-27 | 2015-11-27 | Double-battery switching circuit based on IGBT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105449827A true CN105449827A (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510847698.5A Withdrawn CN105449827A (en) | 2015-11-27 | 2015-11-27 | Double-battery switching circuit based on IGBT |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964301A (en) * | 2016-05-06 | 2016-09-28 | 万华化学集团股份有限公司 | Salicyldenaminato schiff base metal complex catalyst as well as preparation method thereof and application thereof |
| CN109904896A (en) * | 2017-12-11 | 2019-06-18 | 苏州宝时得电动工具有限公司 | Electric tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066655A (en) * | 2012-12-25 | 2013-04-24 | 青岛盛嘉信息科技有限公司 | Monitoring circuit of battery pack voltage |
| CN203816088U (en) * | 2014-04-18 | 2014-09-10 | 王国华 | Portable high-frequency pulse physiotherapy instrument |
-
2015
- 2015-11-27 CN CN201510847698.5A patent/CN105449827A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066655A (en) * | 2012-12-25 | 2013-04-24 | 青岛盛嘉信息科技有限公司 | Monitoring circuit of battery pack voltage |
| CN203816088U (en) * | 2014-04-18 | 2014-09-10 | 王国华 | Portable high-frequency pulse physiotherapy instrument |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964301A (en) * | 2016-05-06 | 2016-09-28 | 万华化学集团股份有限公司 | Salicyldenaminato schiff base metal complex catalyst as well as preparation method thereof and application thereof |
| CN109904896A (en) * | 2017-12-11 | 2019-06-18 | 苏州宝时得电动工具有限公司 | Electric tool |
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Application publication date: 20160330 |
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