CN103532188A - Electric vehicle storage battery charging process monitoring device - Google Patents
Electric vehicle storage battery charging process monitoring device Download PDFInfo
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Abstract
The invention discloses an electric vehicle storage battery charging process monitoring device, which at least comprises a voltmeter, an ammeter, a containing case, connectors and a transmission line; the connector matched with the connector of a charger is arranged at the input end, and the connector matched with the connector of a storage battery is arranged at the output end; the input end is connected with the output end through the transmission line, so that an electric loop is formed; the voltmeter is connected in parallel with the electric loop, and the ammeter is connected in series with the electric loop; the voltmeter, the ammeter and the transmission line are closed in the containing case, and the reading displays of the voltmeter and the ammeter are arranged on the containing case. The electric vehicle storage battery charging process monitoring device belongs to a low-power direct-current intermediate charging process monitoring device, can be plugged between the charger and the storage battery pack through the appropriate connectors, and can use the configured ammeter and voltmeter to interpret charging parameters, monitoring the whole charging process.
Description
Technical field
The present invention relates to the switching device between a kind of electric car charger and storage battery, be specifically related to a kind of for the transfer plug-in type charging process monitoring device between electric car charger and batteries.
Background technology
Due to popularizing of electric motor car, the specification kind of electric car charger and storage battery is more and more, standard imperfection, and the interface of charger and storage battery does not have unified standard, a large amount of generations that misconnection and reversal connection cause the accident, means are not differentiated in charger and accumulator failure and inefficacy intuitively.Therefore, safeguard manufacturer and the repair service point of electric motor car need a kind of insertion apparatus that can monitor charging process and parameter urgently, in order to diagnosis and distinguish fault and reason and attribute.
Summary of the invention
Goal of the invention: the object of the invention is to the deficiency for existing electric motor car after-sale service technology, a kind of applicable electric motor car low power charger characteristic requirements and safe and reliable electromobile battery charging process monitoring device are provided.
Technical scheme: electromobile battery charging process monitoring device of the present invention, at least comprises a voltmeter, ammeter, container, connector and a transmission line; Wherein, the connector mating with charger joint is arranged on input, and the connector mating with battery-terminal is arranged on output; Between input and output, by transmission line, be connected to form electric loop; Described voltmeter is connected in parallel in electric loop, and described ammeter is connected in electric loop; Described voltmeter, ammeter and transmission line are enclosed in described container, and the reading display of voltmeter and ammeter is arranged on container.During use, by monitoring device, be inserted between charger and storage battery, transfer realizes the electric transmission between electric car charger and batteries; Meanwhile, voltage, current parameters in voltmeter, ammeter Continuous Tracking indication charging process, the combined charge time can judge the fault of batteries or charger.Concrete monitoring determination methods is: 1, by working the maximum charging current that fills the nominal of current check charger; 2, in charging current, be reduced to while approaching transfer point, read maximum output voltage nominal value; 3, when red light turns green light, read and check charger nominal state transition point current value and conversion after float charge voltage nominal value; 4, the electric weight that combined charge Time Calculation is filled with when amp-" " number; 5, the storage battery charging interval after emptying too short, represent that battery has dehydration phenomenon; While 6, charging, voltage rising slowly represents that storage battery has salinization (plate vulcanizing) phenomenon; 7, cell voltage does not rise for a long time and represents that salinization is serious or with certain the primary cell lattice short circuit in battery pack; 8, after long-time charging, when the red light of charger does not turn green light, according to the numerical value change situation of the voltage and current in process, in conjunction with the actual charging interval, analyzed judgement again.
Further, in order to prevent that polarity misconnection between monitoring device and charger, storage battery from causing the generation of security incident, simultaneously, the safe voltage standard or the maximum safe direct current standard that when port open, meet charging device, in apparatus of the present invention, be also provided with the circuit module that some have anti-reverse function, specifically comprise input polarity detection module, battery polar detection module, polarity identification logic module, current-limiting type bidirectional analog switch, main electronic switch, RC time delay module and malfunction indicator lamp; Described input polarity detection module and described battery polar detection module are connected across respectively input and the output of electric loop, and the signal of detection is transferred to described polarity identification logic module jointly; Described polarity identification logic module is transferred to generation output signal described current-limiting type bidirectional analog switch when polarity meets; Described current-limiting type bidirectional analog switch is in parallel with major loop by the gate nodes of main electronic switch, one end of current-limiting type bidirectional analog switch is connected to the gate nodes of described main electronic switch and one end of RC time delay module, the other end is connected to the anode of described main electronic switch, and is connected to negative pole of output end through ammeter; The other end of described RC time delay module is connected to negative electrode and the input cathode of described main electronic switch; The positive pole of voltage is connected in input anode, and negative pole table is connected on the symmetric points of described current-limiting type bidirectional analog switch inside; The positive pole of malfunction indicator lamp is connected in the base stage of described polarity identification logic module simultaneously, and negative pole is connected with input anode.After the access of foregoing circuit module, the electric current of being exported by storage battery (being defined as backward current) be take RC time delay module as path, triggers or the work of startup charger; Then, the electric current of being exported by charger (being defined as forward current) is flowing through RC time delay module and after suitable time delay, is driving main electronic switch conducting, and system starts to battery charging.Reversal connection malfunction indicator lamp can be used LED lamp, and when there is reversal connection, the forward voltage drop of the LED lamp being lit is carried out clamper to putting on the reverse voltage of polarity identification logic module base stage simultaneously.
By the above-mentioned circuit module with anti-reverse function is set, can play following function: 1, play a side reversal connection of port or two sides all by the safeguard protection of reversal connection (comprise that charger has been connected AC power and output voltage is effective, charger and batteries are inserted interface with any order); 2, the short-circuit protection of one of port; 3,, when charger output does not meet safe direct voltage standard, the output voltage after device conversion meets safety standard; When only accessing batteries, the short circuit current of input meets the regulation (being less than 50mA) about safe direct current; 4, add after defencive function, storage battery still has certain reverse power supply capacity, to be applicable to triggering or to start different types of charger, for example, needs to use the storage battery being recharged to remove to drive the protection relay of charger built-in; 5, add after defencive function, voltmeter is realized a table double-purpose, indicates the voltage of storage battery while only correctly accessing batteries, indicates the output voltage of charger while only correctly accessing charger, while accessing simultaneously, and the voltage that voltmeter indication is slightly high; When the access of the polarity of one end exists mistake arbitrarily, malfunction indicator lamp is bright; When 6, charging process enters ending phase, when this device does not have minimum breaker points, charging current to be zero, this device zero pressure difference; 8, the control circuit of device itself adopts micro-power consumption design.
Preferably, described input polarity detection module is composed in series by a divider resistance and a diode, diode conducting when input reverse-connection.
Preferably, described battery polar detection module is a divider resistance, and when reversal connection appears in certain port, the electric current that bucking voltage produces in detecting loop is led to the positive terminal of reversal connection malfunction indicator lamp.
Preferably, described polarity identification logic module is PNP transistor, and its base stage is connected with the dividing point of battery polar detection module with input polarity detection module simultaneously; Output stage is connected with current-limiting type bidirectional analog switch.When monitoring device is connected with charger or storage battery, this pipe cut-off while having to occur reversal connection above
Preferably, described main electronic switch is one-way SCR, according to logical condition, control conducting and the blocking-up of major loop, do not get rid of the mirror image circuit that uses negative polarity one-way SCR to form, or the mirror image scheme of using other electronic switching device to form or use other reversed polarity electronic switching device to form.Scheme and mirror image scheme thereof that main electronic switch can also adopt bidirectional power device to form; Or the holohedral symmetry transfer plug-in type switching device that adopts bidirectional power device to form, for example, input and output can be exchanged the switching device of use.
Current-limiting type bidirectional analog switch is in parallel with major loop by main electronic switch silicon controlled gate nodes " G ", this branch current can reverse transmission storage battery energy, the part that the forward current of current-limiting type bidirectional analog switch enters controllable silicon gate pole in node G shunting triggers controlled silicon conducting, because current-limiting type bidirectional analog switch is relation in parallel with silicon controlled anode principal current, triggering is disposable, after controlled silicon conducting, this electric current is determined by silicon controlled conduction voltage drop, maintain on a very little numerical value, referred to as pulse, trigger.Preferably, described current-limiting type bidirectional analog switch comprises forward VMOS field effect transistor, reverse VMOS field effect transistor, branch current sample resistance and bidirectional current limiting control unit; The output stage of described polarity identification logic module is connected to interconnected gate pole and the bidirectional current limiting control unit of described forward VMOS field effect transistor and reverse VMOS field effect transistor; The drain electrode of described forward VMOS field effect transistor is connected with one end of the gate nodes of one-way SCR and RC time delay module; The drain electrode of described reverse VMOS field effect transistor is connected with the anode of one-way SCR, and is connected to negative pole of output end through ammeter; Described branch current sample resistance is connected between forward VMOS field effect transistor and two source electrodes of reverse VMOS field effect transistor; Described bidirectional current limiting control unit is in parallel with described branch current sample resistance, bidirectional current limiting control unit is according to the voltage drop on branch current sample resistance, the output signal producing removes to control the interconnected gate pole of forward VMOS field effect transistor and reverse VMOS field effect transistor, by changing gate voltage, goes restriction to flow through the electric current of current-limiting type bidirectional analog switch.Because this circuit is connected to silicon controlled anode and controls between the utmost point, hold a concurrent post silicon controlled pulse from Trigger Function, meet the requirement of micro-power consumption circuits for triggering.Another effect of current-limiting type bidirectional analog switch is, when charging approaches, finishes, and when charging current is less than silicon controlled and maintains electric current, controllable silicon will turn-off voluntarily, and now, this circuit can maintain little electric current floating charge state, until pressure reduction equals zero.
The negative pole of voltmeter is connected between forward VMOS field effect transistor and two source electrodes of reverse VMOS field effect transistor, positive pole is connected in input anode, can indicate like this in 2 ports of input and output, the port voltage that any one connection is correct, realize a table double-purpose, when in normal charging condition, when 2 ports have correct voltage to exist simultaneously, voltmeter is only indicated a wherein slightly high value.In the present invention, voltmeter is not differentiated the function that port voltage polarity makes a mistake, and when more than one mistake appears in the polarity of voltage of port, malfunction indicator lamp is lit.
Main electronic switch silicon-controlled device has certain restriction to forward blocking voltage climbing, after input has switched on power and is effective, and output plug misuse reversal connection plug up-to-date style, when user inserts storage battery in a flash by plug, can produce a vertical upper up voltage, cause controllable silicon false triggering, in order to promote silicon-controlled device tolerance to forward blocking voltage in side circuit, between node G and controllable silicon negative electrode used, access the RC time delay module of a parallel-connection structure, this RC time delay module can improve silicon controlled interference free performance significantly, tolerate very high forward blocking voltage climbing.Described RC time delay module consists of resistance R and capacitor C parallel connection, and wherein resistance R is the part path of branch current, when branch current charges to capacitor C, and the time delay required to the triggering for generating of main electronic switch.
Inputting, charger has switched on power and output voltage is effective (for example, while having adopted the output safety protective circuit of non-controllable silicon type in the design of charger, its output port has triggering retention performance, after the load of output port is thrown off, still be locked into output effectively), and under the condition of output plug misuse reversal connection plug, current-limiting type bidirectional analog switch can produce a delay (the gate pole parasitic capacitance of the main VMOS field effect transistor by 2 anti-series determines) after the cut-off signals that receives polarity identification logical circuit, thereby cause the controllable silicon can be by false triggering, another usefulness after above-mentioned RC time delay module is got involved is to the reserved regular hour of closing of " current-limiting type bidirectional analog switch ", that is to say silicon controlled is triggered and provides the postponement being associated constantly, need the time postponing to be determined by maximum current and the RC time delay module of " current-limiting type bidirectional analog switch ", calculate this time of delay with microsecond, in the middle of being used, reality is not aware of.
In order to prevent misconnection, another technical scheme of the application is: also comprise three diodes, voltage-stabiliser tube, two power resistors, relay and contact thereof, No. one diode is connected between input anode and output head anode together with ammeter, normally open contact; No. two diodes and power resistor form a branch road and ammeter is connected in parallel between input anode and output head anode; No. three diodes, No. two power resistors and relay in parallel being connected across between the positive pole and negative pole of output together with voltmeter; The input of voltage-stabiliser tube is connected between No. two power resistors and relay, and output is connected on negative pole of output end;
When battery accesses when correct, the forward current of battery is through No. three diodes, then by powering to relay after No. two power resistors, voltage-stabiliser tube voltage stabilizing, the normally open contact of relay is by closure; Meanwhile, the electric energy of storage battery is triggered and is access in charger by a power resistor and No. two diode branch; The effect of No. two diodes is here the one-way in order to ensure trigger current, avoids relay to produce misoperation.
After charger starts, the contact of diode and relay provides charging current for storage battery.The effect of a diode is the one-way in order to ensure charging current, when inputting polarity by reversal connection, can guarantee that battery can, to charger short circuit dischange, be not one of principal character of another program of the present invention with the contact tandem compound of unilateral diode and relay.
The present invention compared with prior art, its beneficial effect is: 1, the invention belongs to rotatable charging process monitoring device in small power DC, by suitable connector, can be inserted in the centre of charger and batteries, use ammeter and voltmeter by configuration to get final product interpretation charge parameter, the overall process of supervision charging.2, in apparatus of the present invention, further have access to the circuit module with anti-reverse function; control circuit adopts micro-power consumption design; main switch adopts power-type contactless electron device; when there is any reversal connection mistake and short trouble in the connection of the input and output port installing; automatically realize effective open circuit protection (comprise that charger has been connected AC power and output voltage is effective, charger and batteries are inserted interface with any order).When charger input voltage is effective and output does not access storage battery, be output as the no-voltage that meets safety standard; When charger has open circuit safety protection function, after access storage battery, device can reverse connection batteries go to trigger or start charger, makes the output voltage of charger effective; When charger output does not meet safe direct voltage standard, the output voltage after device conversion meets safety standard.When only accessing batteries, the short circuit current of input meets the regulation (being less than 50mA) about safe direct current; Storage battery has certain reverse power supply capacity, to be applicable to triggering or to start different types of charger, for example, needs to use the storage battery being recharged to remove to drive the protection relay of charger built-in.3, the voltmeter of this device is realized a table double-purpose, when batteries only accesses the voltage of indicating batteries when correct, when only charger access output correct and charger is effective, indicate the output voltage of charger, when the correct access simultaneously of two ends, the voltage that voltmeter indication is slightly high, when the access of the polarity of one end is wrong arbitrarily, malfunction indicator lamp is bright.When 4, charging process enters ending phase, when device itself does not have minimum breaker points, charging current to be zero, device zero pressure difference.
Accompanying drawing explanation
Fig. 1 is that electromobile battery charging process monitoring device uses connection diagram;
Fig. 2 is electromobile battery charging process monitoring device theory diagram in embodiment 1;
Fig. 3 is electromobile battery charging process monitoring device structural representation in embodiment 1;
Fig. 4 is electromobile battery charging process monitoring device structural representation in embodiment 2.
Embodiment
Below technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.
embodiment 1:a kind of electromobile battery charging process monitoring device, as shown in Figure 3, comprise input polarity detection module 1, battery polar detection module 2, polarity identification logic module 3, malfunction indicator lamp 4, forward VMOS field effect transistor 5, reverse VMOS field effect transistor 6, branch current sample resistance 7, bidirectional current limiting control unit 8, main electronic switch 9, RC time delay module 10, voltmeter 11, ammeter 12.By forward VMOS field effect transistor 5, reverse VMOS field effect transistor 6, branch current sample resistance 7, bidirectional current limiting control unit 8 form current-limiting type bidirectional analog switches.By controllable silicon, form main electronic switch.
Input polarity detection module 1 comprises a diode of divider resistance and series connection thereof, is connected across input; During diode current flow, malfunction indicator lamp lights, and represents that input polarity is connect instead, under correct polarity connection, does not have electric current to pass through diode, presentation logic " 1 ".
Battery polar detection module 2 is comprised of divider resistance, is connected across battery-end; Presentation logic " 1 " when storage battery access polarity is correct.
Polarity identification logic module 3 is PNP transistor.
Input polarity detection module 1 is all connected with the base stage of PNP transistor in polarity identification logic module 3 with the divider resistance in battery polar detection module 2, and the output of polarity identification logic module 3 is connected to interconnected gate pole and the bidirectional current limiting control unit 8 of forward VMOS field effect transistor 5, reverse VMOS field effect transistor 6; 2 gate poles of forward VMOS field effect transistor 5, reverse VMOS field effect transistor 6 are connected, oppositely the drain electrode of VMOS field effect transistor 6 is connected with the anode of controllable silicon 9, the drain electrode of forward VMOS field effect transistor 5 is connected to the control utmost point (hereinafter to be referred as node G) of controllable silicon 9 and one end of RC time delay module 10, between 2 source electrodes of forward VMOS field effect transistor 5, reverse VMOS field effect transistor 6, accesses sample resistance 7 and the bidirectional current limiting control unit 8 in parallel with sample resistance 7; RC Postponement module 10 is connected between node G and the negative electrode of controllable silicon 9, in order to provide necessary time delay to the triggering of controllable silicon 9, can significantly improve the tolerance of 9 pairs of forward voltage build-up rates of controllable silicon simultaneously; Voltmeter 11 one end are connected on the source electrode that current sampling resistor 7(is also reverse VMOS field effect transistor 6 or forward VMOS field effect transistor 5), one end is connected with output head anode; Ammeter 12 one end are connected with silicon controlled anode (being also the drain electrode of reverse VMOS field effect transistor 6), and one end is connected with negative pole of output end; Reversal connection malfunction indicator lamp 4 adopts the LED lamp (redness) of high brightness, the base stage of its anodal PNP transistor with polarity identification logic 3 is connected, negative pole is connected with input anode (with the anodal intercommunication of battery-end), when described LED lamp is lighted, its forward voltage drop is carried out " clamper " protection to being applied to the reverse withstand voltage of the base stage of the PNP transistor in polarity identification logic 3; .
Forward VMOS field effect transistor 5, reverse VMOS field effect transistor 6, sample resistance 7, the set of bidirectional current limiting control unit 8 is referred to as current-limiting type bidirectional analog switch, it is a two-way branch road of little electric current of this device connecting charger and batteries, when loop current is provided by storage battery, this electric current is triggering or the starting current of charger, after the output effectively of charger, branch current is silicon controlled trigger current, after controlled silicon conducting, its additional very little electric current, import and trigger the part that node G becomes loop total current, current-limiting type bidirectional analog switch and main electronic switch are parallel operation mode, total current equals silicon controlled anode current and branch current algebraical sum.
Bidirectional current limiting control unit 8 is according to the voltage drop of the transmission on branch current sample resistance 7, the output signal producing removes to control the interconnected gate pole of above-mentioned two field effect transistor (forward VMOS field effect transistor 5, reverse VMOS field effect transistor 6), by changing gate voltage, goes restriction to flow through the electric current of two field effect transistor.Bidirectional current limiting control unit 8 consists of two npn type bipolar transistors, utilizes the threshold value of P knot to be worth as a comparison, when the voltage drop on branch current sample resistance 7 surpasses threshold value, and transistor turns, thus reduce by two control voltages on the interconnected gate pole of field effect transistor.
Cut-off current (milliampere)=threshold value (millivolt)/branch current sample resistance 7(ohm);
When electric current surpasses setting, reduce the gate voltage of aforementioned two field effect transistor, until close forward VMOS field effect transistor 5 and reverse VMOS field effect transistor 6; The negative pole of voltmeter 11 is connected to the source electrode of reverse VMOS field effect transistor 6, when storage battery accesses separately, reverse VMOS field effect transistor 6 reverse-conductings, voltmeter 11 indication battery tensions, when charger accesses separately, the reverse conducting of forward VMOS field effect transistor, voltmeter 11 indication charger voltage when effective (charger export).
RC Postponement module 10 is connected to silicon controlled and controls between the utmost point (node G) and negative electrode, in order to silicon controlled is triggered necessary time delay is provided, can significantly improve the tolerance of controllable silicon to forward voltage build-up rate simultaneously.
The current drain of relevant unit:
Input polarity detection module 1; When polarity connection is correct, current drain is 0, during reversal connection voltage 100V, lights approximately 5 milliamperes of indicator lights;
Battery polar detection module 2: when cell voltage is 70V, approximately 1 milliampere, during reversal connection voltage 70V, light approximately 1 milliampere of indicator light;
Polarity identification logic module 3: when charging voltage is 70V, approximately 1.8 milliamperes is 0 during battery-end reversal connection;
Bidirectional current limiting control unit 8: itself does not have independently current drain, during 70V current limliting, causes that the electric current of polarity identification logic 3 increases approximately 0.2 milliampere;
Malfunction indicator lamp 4: when polarity connection is correct, electric current is 0;
During voltmeter 11:100V 1 milliampere;
Ammeter 12 can be used the ammeter of absolute value indicator type instead.
In addition input and output are an in parallel separately capacitor (not shown).
This device specific works process:
One, normal operation
The input both positive and negative polarity of charger access device, the battery plus-negative plate of storage battery access device, input polarity detection module and the battery polar detection module of device detect and are transferred to polarity identification logic module to input signal, when if storage battery and charger access correctly and voltage is effective simultaneously, the condition of polarity identification logic module is set up, voltmeter indication storage battery and charger be a slightly high magnitude of voltage wherein, transfer signals to current-limiting type bidirectional analog switch simultaneously, one end of current-limiting type bidirectional analog switch is connected to silicon controlled in main electronic switch and controls the utmost point, the electric current of being exported by storage battery (being defined as backward current) be take RC time delay module as path, trigger or the work of startup charger, the electric current of then being exported by charger (being defined as forward current) is flowing through RC time delay module and after suitable time delay, is driving controlled silicon conducting, and charger starts to battery charging.When charging approaches end, charging current is less than silicon controlled and maintains electric current, and controllable silicon will turn-off voluntarily, and now, whole circuit maintains little electric current floating charge state, until pressure reduction is zero.
Two, fault
(1) when there is reversal connection in one of charger and storage battery, the condition of polarity identification logic module is false, the voltage drop at sample resistance two ends is sent to bidirectional current limiting control unit, when electric current surpasses setting, voltage on sample resistance surpasses the threshold value of transistor P knot in bidirectional current limiting control unit, transistor turns, thereby reduce the interconnected gate voltage of two field effect transistor (forward VMOS field effect transistor, reverse VMOS field effect transistor), until close two field effect transistor, main electronic switch turn-offs, and reversal connection malfunction indicator lamp is bright:
When charger input reverse-connection and voltage effective, and battery polar is when correct, forward VMOS field effect transistor is blocking state, built-in backward diode conducting in reverse VMOS field effect transistor, voltmeter indication battery tension, now, the diode current flow during input polarity detects, reversal connection malfunction indicator lamp (LED) is lighted (low-light level);
Work as reverse connection of accumulator, and when the polarity of charger input is correct and voltage is effective, reverse VMOS field effect transistor is blocking state, built-in backward diode conducting in forward VMOS field effect transistor, the magnitude of voltage of voltmeter indication charger, reversal connection malfunction indicator lamp (LED) is lighted (high brightness).
(2) though when the reversal connection simultaneously of storage battery and charger and voltage whether effective, voltmeter indicated value is zero.
(3) when storage battery accesses separately, reverse VMOS field effect transistor reverse-conducting, voltmeter indication battery tension, when charger accesses separately, the reverse conducting of forward VMOS field effect transistor, voltmeter indication charger voltage (charger output is effectively).If now the charger of access does not meet safety standard in electric motor car industry standard, the output voltage after device conversion is zero, makes it meet the safety standard in electric motor car industry standard; When the charger of access meets in electric motor car industry standard safety standard, the voltage that voltmeter records is generally zero, owing to meeting after the type needs of safety standard in electric motor car industry standard access storage battery, activate output port, require the electric energy that this device can the defeated storage battery of reverse transmission; According to direct current safe current, be less than the relevant criterion of 50mA, this device is limited in maximum by backward current and is less than direct current safe current, so that the compatible type that meets safety standard in electric motor car industry standard that adopts relay to connect output port.
embodiment 2:a charging process monitoring device, as shown in Figure 4, comprises a relay, 3 diodes, and a voltage-stabiliser tube, 2 power resistors and voltmeter, ammeter form; Its annexation can be explained by Fig. 4.
When battery accesses when correct, the forward current of battery is through No. three diode D3, then by powering to relay after No. two power resistor R2, voltage-stabiliser tube Z1 voltage stabilizing, its normally open contact is by closure; Meanwhile, the electric energy of storage battery is triggered and is access in charger (if needs) by a power resistor R1 and No. two diode D2 branch roads, and the effect of No. two diode D2 is here the one-way in order to ensure trigger current, avoids relay to produce misoperation.
After charger starts, the contact of diode D1 and relay provides charging current for storage battery, the effect of a diode D1 is the one-way in order to ensure charging current, when inputting polarity by reversal connection, can guarantee that battery can, to charger short circuit dischange, be not one of principal character of the present embodiment 2 with the contact tandem compound of unilateral diode and relay.
Ammeter in Fig. 4 is connected in major loop, in order to simple ground, detects charging current, shown in connection in, trigger current is not included in indicated value; Voltmeter in Fig. 4 connects inverse time at accumulator polarity, does not indicate the voltage of storage battery, when connection is correct, and the terminal voltage of indication storage battery.When accessing charger separately, whether indicated value will meet " safety " standard depending on charger.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope prerequisite of invention that does not depart from claims definition, can make a variety of changes in the form and details it; For example, the mirror image circuit forming with reversed polarity device, the replacement of power-type device or function components and parts, the holohedral symmetry circuit of the commutative use of input and output, integrated power model etc.
Claims (9)
1. an electromobile battery charging process monitoring device, is characterized in that: at least comprise a voltmeter, ammeter, container, connector and a transmission line; Wherein, the connector mating with charger joint is arranged on input, and the connector mating with battery-terminal is arranged on output; Between input and output, by transmission line, be connected to form electric loop; Described voltmeter is connected in parallel in electric loop, and described ammeter is connected in electric loop; Described voltmeter, ammeter and transmission line are enclosed in described container, and the reading display of voltmeter and ammeter is arranged on container.
2. electromobile battery charging process monitoring device according to claim 1, is characterized in that: also comprise input polarity detection module, battery polar detection module, polarity identification logic module, current-limiting type bidirectional analog switch, main electronic switch, RC time delay module and malfunction indicator lamp;
Described input polarity detection module and described battery polar detection module are connected across respectively input and the output of electric loop, and the signal of detection is transferred to described polarity identification logic module jointly; Described polarity identification logic module is transferred to generation output signal described current-limiting type bidirectional analog switch when polarity meets; Described current-limiting type bidirectional analog switch is in parallel with major loop by the gate nodes of main electronic switch, one end of current-limiting type bidirectional analog switch is connected to the gate nodes of described main electronic switch and one end of RC time delay module, the other end is connected to the anode of described main electronic switch, and is connected to negative pole of output end through ammeter; The other end of described RC time delay module is connected to negative electrode and the input cathode of described main electronic switch; The positive pole of voltmeter is connected in input anode, and negative pole is connected on the symmetric points of described current-limiting type bidirectional analog switch inside; The positive pole of malfunction indicator lamp is connected in the base stage of described polarity identification logic module simultaneously, and negative pole is connected with input anode.
3. electromobile battery charging process monitoring device according to claim 2, is characterized in that: described input polarity detection module is composed in series by a divider resistance and a diode.
4. electromobile battery charging process monitoring device according to claim 2, is characterized in that: described battery polar detection module is a divider resistance.
5. electromobile battery charging process monitoring device according to claim 2, is characterized in that: described polarity identification logic module is PNP transistor, and its base stage is connected with the dividing point of battery polar detection module with input polarity detection module simultaneously; Output stage is connected with current-limiting type bidirectional analog switch.
6. electromobile battery charging process monitoring device according to claim 2, is characterized in that: described main electronic switch is the mirror image circuit that one-way SCR or one-way SCR form.
7. electromobile battery charging process monitoring device according to claim 6, is characterized in that: described current-limiting type bidirectional analog switch comprises forward VMOS field effect transistor, reverse VMOS field effect transistor, branch current sample resistance and bidirectional current limiting control unit; The output stage of described polarity identification logic module is connected to interconnected gate pole and the bidirectional current limiting control unit of described forward VMOS field effect transistor and reverse VMOS field effect transistor; The drain electrode of described forward VMOS field effect transistor is connected with one end of the gate nodes of one-way SCR and RC time delay module; The drain electrode of described reverse VMOS field effect transistor is connected with the anode of one-way SCR, and is connected to negative pole of output end through ammeter; Described branch current sample resistance is connected between forward VMOS field effect transistor and two source electrodes of reverse VMOS field effect transistor; Described bidirectional current limiting control unit is in parallel with described branch current sample resistance, bidirectional current limiting control unit is according to the voltage drop on branch current sample resistance, the output signal producing removes to control the interconnected gate pole of forward VMOS field effect transistor and reverse VMOS field effect transistor, by changing gate voltage, goes restriction to flow through the electric current of current-limiting type bidirectional analog switch; The negative pole of voltmeter is connected between forward VMOS field effect transistor and two source electrodes of reverse VMOS field effect transistor, and positive pole is connected in input anode.
8. electromobile battery charging process monitoring device according to claim 2, it is characterized in that: described RC time delay module consists of resistance R and capacitor C parallel connection, wherein resistance R is the part path of branch current, when branch current charges to capacitor C, the time delay required to the triggering for generating of main electronic switch.
9. electromobile battery charging process monitoring device according to claim 1, it is characterized in that: also comprise three diodes, voltage-stabiliser tube, two power resistors, relay and contact thereof, No. one diode is connected between the positive pole and output head anode of input together with ammeter, normally open contact; No. two diodes and power resistor form a branch road and ammeter is connected in parallel between input anode and output head anode; No. three diodes, No. two power resistors and relay in parallel being connected across between the positive pole and negative pole of output together with voltmeter; The input of voltage-stabiliser tube is connected between No. two power resistors and relay, and output is connected on negative pole of output end;
When battery accesses when correct, the forward current of battery is through No. three diodes, then by powering to relay after No. two power resistors, voltage-stabiliser tube voltage stabilizing, the normally open contact of relay is by closure; Meanwhile, the electric energy of storage battery is triggered and is access in charger by a power resistor and No. two diode branch; After charger starts, the contact of diode and relay provides charging current for storage battery.
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| CN201310462010.2A CN103532188B (en) | 2013-09-30 | 2013-09-30 | Electric vehicle storage battery charging process monitoring device |
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| CN201310462010.2A CN103532188B (en) | 2013-09-30 | 2013-09-30 | Electric vehicle storage battery charging process monitoring device |
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| CN103532188B CN103532188B (en) | 2015-04-29 |
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| CN104617562A (en) * | 2015-02-16 | 2015-05-13 | 中国北方车辆研究所 | Vehicle inverted connection proof device |
| CN104777430A (en) * | 2015-04-30 | 2015-07-15 | 西安科技大学 | Switching power supply power loss and storage battery charging and discharging detection indicating circuit and design method thereof |
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| CN104617562A (en) * | 2015-02-16 | 2015-05-13 | 中国北方车辆研究所 | Vehicle inverted connection proof device |
| CN104777430A (en) * | 2015-04-30 | 2015-07-15 | 西安科技大学 | Switching power supply power loss and storage battery charging and discharging detection indicating circuit and design method thereof |
| CN104777430B (en) * | 2015-04-30 | 2017-09-22 | 西安科技大学 | Switching Power Supply dead electricity and accumulator cell charging and discharging detection indicating circuit and its design method |
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| CN105262160A (en) * | 2015-09-29 | 2016-01-20 | 安徽华米信息科技有限公司 | Anti-reverse-connection circuit, anti-reverse-connection processing method, device and intelligent wearable equipment |
| CN105552877A (en) * | 2016-02-01 | 2016-05-04 | 凯迈(洛阳)电子有限公司 | Reverse connection monitoring device of power storage battery |
| CN105914824A (en) * | 2016-05-13 | 2016-08-31 | 深圳市科陆电子科技股份有限公司 | Direct current non-polarized frame type charging device |
| CN106684994A (en) * | 2017-01-03 | 2017-05-17 | 浙江绿源电动车有限公司 | Battery charging-discharging apparatus and electric bicycle |
| CN114167291A (en) * | 2021-12-06 | 2022-03-11 | 国网新疆电力有限公司克州供电公司 | Safe operation and maintenance management system for storage battery of power internet of things of communication station |
| CN114167291B (en) * | 2021-12-06 | 2023-06-02 | 国网新疆电力有限公司克州供电公司 | Storage battery safety operation and maintenance management system for electric power internet of things of communication site |
| CN114640163A (en) * | 2022-05-18 | 2022-06-17 | 广东高斯宝电气技术有限公司 | Interface circuit for parallel operation of direct-current power supply and battery |
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