CN101135721A - Topological circuit suitable for accumulator battery all-round property testing - Google Patents
Topological circuit suitable for accumulator battery all-round property testing Download PDFInfo
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- CN101135721A CN101135721A CNA200710062507XA CN200710062507A CN101135721A CN 101135721 A CN101135721 A CN 101135721A CN A200710062507X A CNA200710062507X A CN A200710062507XA CN 200710062507 A CN200710062507 A CN 200710062507A CN 101135721 A CN101135721 A CN 101135721A
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Abstract
The provided technical solution is: it comprises a linearly-regulating current source circuit, a dual-direction variable current voltage source circuit, a battery pack polarity switching circuit and a control circuit; said circuits are series-connected to the battery pack to construct a charging-discharging circuit; said linear regulator is composed of field effect tube Q, and is series-connected in the charging-discharging circuit; its grid electrode is connected to the control circuit. Said battery pack polarity switching circuit is composed of 4 thyristors to form a bridge circuit; the c, d ends of the bridge arm are connected to the battery pack under test; a, b ends are connected in the charging -discharging circuit; the triggering electrodes of said 4 thyristors are connected to the control circuit.
Description
Technical field
The present invention relates to a kind of improved accumulator battery all-round property testing circuit, be applicable to high voltage, big electric current, powerful battery pack are carried out all-round property testing, belong to technical field of measurement and test.
Background technology
The accumulator battery all-round property testing system be high capacity high-energy-density battery pack and bank of super capacitors (for example: used for electric vehicle power accumulator group, in energy-storage capacitor in the distributed energy resource system and other industry with battery pack and bank of super capacitors) capacity, retention of charge, energy density, power density, static propertiess such as cycle life, and instantaneous power limit, internal resistance, the important testing tool of dynamic properties such as monomer voltage consistance also is the different visual plants that discharge and recharge form to battery pack and bank of super capacitors influence of research.
Traditional accumulator general performance test, it is the current source characteristic when utilizing transistor to be operated in the linear amplification district, with the transistor that is operated in the linear amplification district adjustment element, finish performance test by computing machine online programming control charge and discharge test and online detection as charging and discharging currents.The advantage of this accumulator general performance test is an almost non-ripple of charge and discharge electric current, and shortcoming mainly contains two, the one, in charging and discharge condition, transistor is operated in the linear amplification district, tube voltage drop is big, the power consumption height, thereby only be fit to be used for detecting single accumulator; The 2nd, during discharge test, the electric energy consumption that accumulator is emitted is dispersed on the transistor, and the energy storage of accumulator can't feedback grid.If adopt such accumulator general performance test, battery pack (for example used for electric vehicle power accumulator group) is tested, then equipment volume can be very huge, cost is also very high, and energy conversion efficiency is low, energy dissipation is big, causes the test environment temperature to raise, and makes troubles to the tester.
Adopt PWM rectifier Semiconductor Converting Technology or thyristor full-controlled rectifier device Semiconductor Converting Technology that charging and discharging currents is adjusted, can make desirable AC/DC conversion characteristics of accumulator battery all-round property testing device acquisition and DC/AC conversion characteristics (active inversion) and high voltage, big electric current, high-power (as 500V/500A, 225kW) fan-out capability, can realize that not only gamut is adjustable, and have two-way unsteady flow ability after switching battery pack polarity.But, because the internal resistance of battery pack is minimum, no matter be to adopt PWM rectifier Semiconductor Converting Technology or traditional thyristor full-controlled rectifier device Semiconductor Converting Technology, even take into full account the filter action of wave filter, the ripple coefficient of DC side still can be very big, and wave filter also can reduce the response speed of system.Therefore, the requirement little when directly adopting PWM rectifier Semiconductor Converting Technology or thyristor full-controlled rectifier device Semiconductor Converting Technology all to be difficult to satisfy accumulator battery all-round property testing to the charge and discharge current ripple, this will influence the test result of dynamic performance index such as instantaneous power limit greatly, reduce the public trust of test result.
Summary of the invention
The object of the present invention is to provide that a kind of low-power consumption, ripple are little, the topological circuit that is applicable to accumulator battery all-round property testing of the energy storage feedback grid of battery pack.
The alleged problem of the present invention realizes with following technical proposals:
A kind of topological circuit that is applicable to accumulator battery all-round property testing, it is made up of linear regulation current source circuit, two-way unsteady flow voltage source circuit, battery pack polarity switching circuit and control circuit, described linear regulation current source circuit, two-way unsteady flow voltage source circuit, battery pack polarity switching circuit are connected with tested battery pack and are constituted charging and discharging circuit, its control circuit of control termination of linear regulation current source, two-way unsteady flow voltage source circuit, battery pack polarity switching circuit; Described linear regulation current source is made of field effect transistor Q, and it is series in the charging and discharging circuit, its grid connection control circuit; Described battery pack polarity switching circuit is formed bridge circuit by four thyristors, brachium pontis c, the tested battery pack of d termination, and a, b end is serially connected with in the charging and discharging circuit, and the trigger electrode of four thyristors connects its control circuit.
The above-mentioned topological circuit that is applicable to accumulator battery all-round property testing, described two-way unsteady flow voltage source circuit is made up of rectifier transformer T and six thyristors, six thyristors are connected into the three-phase thyristor bridge rectification circuit, and the trigger electrode of six thyristors connects its control circuit.
The above-mentioned topological circuit that is applicable to accumulator battery all-round property testing, described two-way unsteady flow voltage source circuit is made of rectifier transformer T and PWM rectifier bridge, its control circuit of control termination of PWM rectifier bridge.
The above-mentioned topological circuit that is applicable to accumulator battery all-round property testing is set up the linear reactor L2 that limits the moment impact electric current when polarity is switched in charging and discharging circuit.
The above-mentioned topological circuit that is applicable to accumulator battery all-round property testing, described control circuit comprises the voltage close loop control circuit, the polarity control circuit of current closed-loop control circuit and battery pack, described voltage close loop control circuit is made up of PID circuit and power amplifier, the PID circuit is provided with three feedback signal inputs, the battery pack terminal voltage is taken from an input, the filtered output voltage of two-way unsteady flow voltage source is taken from an input, given definite value reference voltage is taken from an input, and the trigger electrode of three-phase full-controlled bridge thyristor or the control end of PWM rectifier bridge are controlled in the output of PID circuit behind the phase shift power amplifier; Described current closed-loop control circuit is made up of PID circuit and power amplifier, the PID circuit is provided with the input of two-way feedback signal, an input connects given current signal, the charging and discharging currents of battery pack is taken from an input, the grid of the output signal of PID circuit control field effect transistor Q after power amplifier amplifies.
The present invention utilizes the battery pack polarity switching circuit to change the access polarity of battery pack, realizes the switching between the charge and discharge; Size with battery pack charging and discharging currents in the linear regulator control test process with current source characteristic can significantly reduce ripple; Utilize two-way unsteady flow voltage source circuit that the voltage suitable with battery pack is provided, utilize close-loop feedback PID (ratio-integration-differential) to regulate two-way unsteady flow voltage source voltage, keep voltage source voltage and accumulator battery voltage difference and be about dynamical state about 10V, guarantee the best operating condition of linear regulation current source, reduce the dissipated power on the field effect transistor Q to greatest extent, reduce the power consumption of linear regulator, improve the energy conversion efficiency of whole test system, help reducing the volume of whole device simultaneously.The present invention has high voltage, (as 500V/500A, 225kW) fan-out capability in the discharge process of battery pack, can also be the alternating current feedback grid with the energy conversion of battery pack to big electric current simultaneously, has reduced the waste of the energy.Control circuit is controlled the on-line performance test that entire circuit is finished charge and discharge test and battery pack by setup program.In a word, the present invention can ensure effectively that i.e. low-power consumption falls in the low-voltage of linear regulator; Test macro is can volume little, low in energy consumption, ripple is little, have high voltage, big electric current, powerful fan-out capability, and the energy storage of battery pack can feedback grid in discharge process, has saved the energy.
Description of drawings
Fig. 1 is the present invention's electricity theory diagram;
Fig. 2, Fig. 3 are respectively the equivalent circuit diagrams of charging process and discharge process;
Fig. 4 is the two-way unsteady flow voltage source electrical schematic diagram when adopting thyristor full-controlled rectifier device;
Fig. 5 is the two-way unsteady flow voltage source electrical schematic diagram when adopting the PWM rectifier bridge;
Fig. 6, Fig. 7 are respectively the rough schematic views of charging stage and discharge regime.
Each label is among the figure: U
K, two-way unsteady flow voltage source circuit equivalent voltage source, I
0, linear regulator equivalent current source, I
G, given instruction current, the pressure drop of U, linear regulator, U
BT, accumulator battery voltage, BT, battery pack, K, air switch, T, rectifier transformer, SCR1～SCR10, thyristor, C1～C4, capacitor, Q, field effect transistor, PWM, PWM rectifier bridge, L1～L5, inductance (reactor), QKQ, thyristor fully controlled bridge.
Embodiment
Basic thought of the present invention is to constitute a charging and discharging circuit with a voltage source and a current source series connection with battery pack to be measured, when charge and discharge move, voltage source provides the voltage suitable with battery pack, guarantee that the current source operate as normal is in minimum voltage drop, generally about 10V, reduce the power consumption of current source to greatest extent, improve the energy conversion efficiency of whole test system.Make the present invention have following feature: 1. high voltage, big electric current (for example 500V/500A, 225kW) fan-out capability; 2. voltage, the equal gamut of electric current is adjustable; 3. response speed fast (as the instantaneous limit power test time require electric current in 40ms, to regulate be stabilized to set-point); 4. the DC current ripple is less than 0.2%, but not common current average or effective value are constant; 5. have two-way unsteady flow ability, energy can feedback grid; When 6. adopting novel PWM rectifier Semiconductor Converting Technology, can also realize net side power factor height, low harmonic wave; 7. save non-ferrous metal, complete machine energy conversion efficiency height.
Fig. 2 is the equivalent circuit diagram of charging process, and about U=10V has U among the figure
K=U
BT+ 10.Fig. 3 is the equivalent circuit diagram of discharge process, about U=10V, and in the discharge process, U
K=U
BT-10.
Among Fig. 4, Fig. 5, the electron carrier that high power transistor Q (metal-oxide-semiconductor) adjusts as charging and discharging currents, it is operated in the linear amplification state.The output resistance of field effect transistor that is operated in the linear amplification district is often much higher than normal transistor, can reach about megaohm, and constant current source utilizes the high and relative constant current characteristics formation of field effect transistor output impedance just.
The transistor of circuit common darlington structure commonly used is as adjusting pipe, and the tube voltage drop that needs nearly ten volts owing to it just can be operated in linear condition, so driving circuit pipe consumption is big, efficient is low, circuit is complicated.And the channel resistance of some power MOS pipes has dropped to 10 now
-2Magnitude, can do very lowly with it as adjusting the pipe tube voltage drop, efficient also can increase substantially, and because power MOS pipe can equivalence become Voltage-controlled Current Source type device, power controlling is very little, so circuit also can greatly be simplified.
Adopt thyristor full-controlled rectifier device Semiconductor Converting Technology or PWM rectifier Semiconductor Converting Technology, can obtain controlled AC/DC conversion characteristics (rectification) and DC/AC conversion characteristics (active inversion), realize easily high voltage, big electric current, high-power (500V/500A for example, 225kW) fan-out capability, and gamut is adjustable, has two-way unsteady flow function after the switching battery pack polarity.
The present invention operates mainly in three kinds of typicalnesses: charging, conversion, discharge are example with thyristor fully controlled bridge unsteady flow electric current, and the principle of work of each typicalness is as follows:
1. charging stage (as Fig. 4).Three-phase alternating current is through rectifier transformer, be operated in the three-phase full-controlled bridge of rectification state, the LC filtering circuit, field effect transistor Q, SCR1, SCR4 charges to the power accumulator group, this process adopts the thyristor fully controlled bridge to follow the tracks of the voltage close loop regulative mode of accumulator battery voltage, control circuit changes the conduction angle of thyristor fully controlled bridge by the voltage that detects battery pack, output voltage after making the thyristor fully controlled bridge through the LC filtering circuit is higher than about the voltage 10V of power accumulator group, thereby guaranteeing that linear regulator two ends pressure drop is limited in about 10V, is feedback signal from the voltage signal of two-way unsteady flow voltage output terminal; After condition satisfied, the accumulator battery all-round property testing circuit was started working by the test technology requirement.After a test phase is finished, fully controlled bridge is got back to the initialization state and (is moved on to maximum after the charging modes trigger angle, it is minimum that the discharge mode conduction angle reduces to), because capacitor C 4 both end voltage are than accumulator battery voltage height, capacitor also will continue battery pack is carried out of short duration charging, this moment, linear regulator two ends pressure drop was very low, it is operated in fully conducting state, when the electric capacity both end voltage is equal with power accumulator group both end voltage, circuital current is zero, thyristor turn-offs naturally, and charging process finishes.
2. discharge and recharge translate phase.After charging stage finishes; capacitor C 4 polarity of voltages be on just (+), down negative (-); and discharge when beginning; single bridge (the SCR2 of DC side; SCR3) open-minded; accumulator battery voltage polarity should be down just (+), upward negative (-); will be at first to the capacitor reverse charging; at this moment, the linear regulator both end voltage is the twice of accumulator battery voltage approximately, will have very big temporary impact electric current to flow through linear regulator in the circuit; therefore; need in circuit, add current limiting reactor L2, play the effect of restriction transient current and dividing potential drop, thus the protection linear regulator.When capacitor C 4 polarity of voltages for down just (+) go up negative (-), amplitude discharges and recharges transfer process and finishes during near accumulator battery voltage.
3. discharge regime.Battery pack is through the single bridge (SCR2 of DC side, SCR3), be operated in the three-phase full-controlled bridge of active inversion state, the LC filtering circuit, field effect transistor Q forms the loop, discharge to the three-phase alternating current electrical network by rectifier transformer, this stage and charging stage, different was control circuit changes the thyristor fully controlled bridge by the voltage that detects battery pack inversion angle, the voltage of power accumulator group is higher than about capacitor voltage at both ends 10V, thereby guarantee that the linear regulator polarity of voltage is just (+) right negative (-) of a left side all the time, and voltage limit is in 10V.After condition satisfied, the accumulator battery all-round property testing circuit was started working by the test technology requirement.In charge and discharge process, be controlled plant with the discharge current, the grid voltage of closed-loop control linear regulator makes outputting current steadily on command value.
Utilize the current source characteristic of linear regulator, can satisfy the requirement of the low ripple of output current; Voltage close loop control and current closed-loop control can adopt software programming to realize, also can realize by hardware circuit, all can guarantee voltage, the current precision of circuit, the response time.
Claims (5)
1. topological circuit that is applicable to accumulator battery all-round property testing, it is characterized in that, it is made up of linear regulator, two-way unsteady flow voltage source circuit, battery pack polarity switching circuit and control circuit, described linear regulation current source circuit, two-way unsteady flow voltage source circuit, battery pack polarity switching circuit are connected with tested battery pack and are constituted charging and discharging circuit, its control circuit of control termination of linear regulation current source circuit, two-way unsteady flow voltage source circuit, battery pack polarity switching circuit; Described linear regulator is made of field effect transistor Q, and it is series in the charging and discharging circuit, its grid connection control circuit; Described battery pack polarity switching circuit is formed bridge circuit by four thyristors, brachium pontis c, the tested battery pack of d termination, and a, b end is serially connected with in the charging and discharging circuit, and the trigger electrode of four thyristors connects its control circuit.
2. according to the described topological circuit that is applicable to accumulator battery all-round property testing of claim 1, it is characterized in that described two-way unsteady flow voltage source circuit is by rectifier transformer T and six thyristors and L
1, C
4Filtering circuit is formed, and six thyristors are connected into the three-phase thyristor bridge rectification circuit, and the trigger electrode of six thyristors connects its control circuit.
3. according to the described topological circuit that is applicable to accumulator battery all-round property testing of claim 1, it is characterized in that described two-way unsteady flow voltage source circuit is made of rectifier transformer T and PWM rectifier bridge, its control circuit of control termination of PWM rectifier bridge.
4. according to claim 2 or the 3 described topological circuits that are applicable to accumulator battery all-round property testing, it is characterized in that, set up the linear reactor L that limits the moment impact electric current when polarity is switched in charging and discharging circuit
2
5. the topological circuit that is applicable to accumulator battery all-round property testing according to claim 4 is characterized in that described control circuit comprises the polarity control circuit of voltage close loop control circuit, current closed-loop control circuit and battery pack; Described voltage close loop control circuit is made up of PID circuit and power amplifier, the PID circuit is provided with three feedback signal inputs, the battery pack terminal voltage is taken from an input, the filtered output voltage of two-way unsteady flow voltage source is taken from an input, given definite value reference voltage is taken from an input, and the trigger electrode of three-phase full-controlled bridge thyristor or the control end of PWM rectifier bridge are controlled in the output of PID circuit behind the phase shift power amplifier; Described current closed-loop control circuit is made up of PID circuit and power amplifier, the PID circuit is provided with the input of two-way feedback signal, an input connects given current signal, the charging and discharging currents of battery pack is taken from an input, the grid of the output signal of PID circuit control field effect transistor Q after power amplifier amplifies.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710062507XA CN101135721A (en) | 2007-08-03 | 2007-08-03 | Topological circuit suitable for accumulator battery all-round property testing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710062507XA CN101135721A (en) | 2007-08-03 | 2007-08-03 | Topological circuit suitable for accumulator battery all-round property testing |
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| CN101135721A true CN101135721A (en) | 2008-03-05 |
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| CNA200710062507XA Pending CN101135721A (en) | 2007-08-03 | 2007-08-03 | Topological circuit suitable for accumulator battery all-round property testing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175977A (en) * | 2011-01-30 | 2011-09-07 | 刘连仲 | Lithium battery detection device with mutual charge/discharge function |
| CN104122503A (en) * | 2014-07-30 | 2014-10-29 | 厦门科华恒盛股份有限公司 | Constant-voltage retrospective online testing device and constant-voltage retrospective online testing method for batteries of uninterrupted power systems |
| CN105006850A (en) * | 2014-04-23 | 2015-10-28 | 林新辉 | Electronic load switching system |
| CN106526496A (en) * | 2016-12-09 | 2017-03-22 | 宁德时代新能源科技股份有限公司 | Fault detection method and device |
| CN107632269A (en) * | 2017-09-21 | 2018-01-26 | 孙亮 | The online charging-discharge tester system of communication storage battery |
| CN111413632A (en) * | 2020-04-03 | 2020-07-14 | 福建星云电子股份有限公司 | Test circuit and test method for charge and discharge activation of lithium battery pack finished product |
| CN114189157A (en) * | 2021-10-26 | 2022-03-15 | 上海空间电源研究所 | Segmented PID control circuit and method based on double full-bridge converter |
-
2007
- 2007-08-03 CN CNA200710062507XA patent/CN101135721A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175977A (en) * | 2011-01-30 | 2011-09-07 | 刘连仲 | Lithium battery detection device with mutual charge/discharge function |
| CN105006850A (en) * | 2014-04-23 | 2015-10-28 | 林新辉 | Electronic load switching system |
| CN104122503A (en) * | 2014-07-30 | 2014-10-29 | 厦门科华恒盛股份有限公司 | Constant-voltage retrospective online testing device and constant-voltage retrospective online testing method for batteries of uninterrupted power systems |
| CN106526496A (en) * | 2016-12-09 | 2017-03-22 | 宁德时代新能源科技股份有限公司 | Fault detection method and device |
| CN107632269A (en) * | 2017-09-21 | 2018-01-26 | 孙亮 | The online charging-discharge tester system of communication storage battery |
| CN111413632A (en) * | 2020-04-03 | 2020-07-14 | 福建星云电子股份有限公司 | Test circuit and test method for charge and discharge activation of lithium battery pack finished product |
| CN114189157A (en) * | 2021-10-26 | 2022-03-15 | 上海空间电源研究所 | Segmented PID control circuit and method based on double full-bridge converter |
| CN114189157B (en) * | 2021-10-26 | 2024-05-03 | 上海空间电源研究所 | Sectional PID control circuit and method based on double full-bridge converters |
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