CN207601280U - A kind of accumulator group state on-line measurement circuit - Google Patents
A kind of accumulator group state on-line measurement circuit Download PDFInfo
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- CN207601280U CN207601280U CN201721605031.5U CN201721605031U CN207601280U CN 207601280 U CN207601280 U CN 207601280U CN 201721605031 U CN201721605031 U CN 201721605031U CN 207601280 U CN207601280 U CN 207601280U
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Abstract
The utility model discloses a kind of accumulator group state on-line measurement circuits,The on-line measurement circuit is included by discharge resistance group,The discharge measuring circuit that chip current sensor and the first metal-oxide-semiconductor are sequentially connected in series,The electrode line terminated out from discharge resistance group,And from the negative line that the first metal-oxide-semiconductor terminates out,The positive wiring BatN1A and negative wiring BatN0A of the accumulator quantity N corresponding to accumulator group is separated respectively,The contact switch controlled by route selection relay K is respectively equipped on positive wiring BatN1A and negative wiring BatN0A,It is in parallel between electrode line and negative line to be connected to the charging circuit that constant-current charging power and the second metal-oxide-semiconductor are connected in series,Voltage sensor,Controller CPU controls the on-line measurement circuit,By being closed the route selection relay at single battery the two poles of the earth for needing to measure,Choose battery,Obtain voltage and internal resistance data；The utility model can more accurately detect abnormal cell batteries voltage and internal resistance, moreover it is possible to realize and carry out equalizaing charge to backward accumulator.
Description
Technical field
The utility model is related to a kind of accumulator group state on-line measurement circuits.
Background technology
In 48V communication power supplies screen, electric power 220V/110V direct current cabinets, ups power screen and EPS power supply panels, accumulator makes
Dosage is very big.A group storage battery group is formed by connecting between multiple cell batteries, the standby energy is provided for these power supply panels.Outside
When portion's alternating current is normal, by the rectification charging module of power supply panel to battery charging.When power grid AC outage, by electric power storage
Pond group provides the uninterrupted energy to power supply panel.
Accumulator group is usually to be connected and formed by more than ten sections or tens section cell batteries.Rectification charging module simultaneously connects
At the both ends of whole group accumulator to battery charging, charging current flows through each cell batteries of whole group series connection.Because of list
There are minor individual differences for the performance parameter of accumulator body, during the serial connection charge to whole group accumulator, necessarily occur certain
A little accumulators have been filled with or overcharge, and certain accumulators are full of not yet or charge less phenomenon.Prolonged accumulation, overcharges or charge less
Accumulator property can drastically decline.Once by there is some accumulator in multiple cell batteries accumulator group in series
Failure may result in whole group accumulator and be unable to normal power supply output, so as to cause serious power outage.
At present to the detection of accumulator group, there are two types of the ways generally used：One kind is periodically to carry out core to accumulator group
To property electric discharge.Check whether battery group capacity is up to standard, this work is very cumbersome.It discharges accumulator group and subsequent
Charging needs to take several days the time, generates a large amount of thermal energy in the process, and staff must post in battery room, constantly
Record it is each section cell batteries terminal voltage, expend a large amount of manpower and materials.And accumulator is by normally to during backward conversion
Between only need or so two weeks.It tends not to find backward accumulator in the period safeguarded in regular electric discharge verification property, cause
The very big security risk of electric supply system.Another kind is utilized in line battery data logging device, the only each section accumulator of on-line measurement
Voltage.Because of the complexity of internal storage battery, this detection method is also incomplete, it is impossible to accurately detect abnormal monomer electric power storage
Pond.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of accumulator group state on-line measurement circuit, adopts
Accumulator group state on-line measurement is carried out with the on-line measurement circuit of the utility model, can more accurately detect that abnormal monomer stores
Cell voltage and internal resistance, and can also realize and equalizaing charge is carried out to backward accumulator.
The principle of the utility model is：Control the switching of multiple relays respectively by the CPU programs on measuring instrument first,
Line options certain section cell batteries to be measured；Then it by circuit moment is put into and is cut off at the cell batteries the two poles of the earth selected and is auxiliary
Load is helped, the cell batteries is allowed to spark；In the process, which is acquired by high-speed AD sampling A/D chip
The value U0 of both end voltage, the voltage difference U1 of moment, voltage difference U2 in short-term；Acquisition is put into assistant load moment simultaneously
When, the discharge current I0 of the accumulator to be measured；Finally by Ohm's law R=U/I, the ohmic internal resistance and ginseng of cell batteries are calculated
Examine polarization resistance；The equalizaing charge and electric discharge of input or excision to accumulator can also be realized by circuit simultaneously.
Above-mentioned technical problem is solved, the utility model adopts the following technical scheme.
A kind of accumulator group state on-line measurement circuit, it is characterized in that including：
One discharge measuring being sequentially connected in series by discharge resistance group, chip current sensor U14 and the first metal-oxide-semiconductor U11
Circuit, the electrode line+I terminated out from discharge resistance groupbatAnd negative line-the I terminated out from the first metal-oxide-semiconductor U11batOn, point
The positive wiring BatN1A and negative wiring BatN0A of the accumulator quantity N corresponding to the accumulator group is not separated, in positive wiring
The contact switch controlled by route selection relay K is respectively equipped on BatN1A and negative wiring BatN0A；The route selection relay is each
From equipped with control circuit, control circuit is equipped with control signal；
One charging circuit being connected in series by constant-current charging power, disconnecting relay K19, K20 and the second metal-oxide-semiconductor U10, two
The end access in parallel electrode line (+Ibat) and negative line (- Ibat)；
One voltage acquisition circuit, the parallel connection access electrode line+Vbat and negative line-Vbat；
One controller CPU, connected respectively by hardware decoder the control circuit of each route selection relay input terminal,
The control terminal of the control circuit input terminal of disconnecting relay, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor；
The positive wiring BatN1A and negative wiring BatN0A is being respectively connected to each accumulator of accumulator group just when measuring
Cathode.
The discharge resistance group is：Connect a fusible core Fu2, fusible core Fu2 again after two resistance R57 and R58 are in parallel
It is connect with chip current sensor U14.
The route selection relay and the control circuit of disconnecting relay are：The control signal that control terminal is come is through base resistance
The base stage of connecting triode, collector, the other end of operating voltage Vcc one end access triode are followed by triode base through resistance
Pole, the emitter of triode are grounded after relay, and diode, cathode ground connection are also parallel at the both ends of relay.
The external fusible core Fu2 in two IP+ ports of the chip current sensor U14, two IP- ports connections first
4 D ports, the Vcc ports of metal-oxide-semiconductor connect operating voltage Vcc, Vo port connected after resistance R59 pulsed current signal output terminal,
Gnd ports are connected to pulsed current signal output terminal after capacitance C9.
Three S ports of first metal-oxide-semiconductor connect negative wiring BatN0A, G port and connect control signal.
The on-line measurement circuit further includes A/D chip, and the data of the current sensor and voltage acquisition circuit pass through AD
Chip is transferred to computer.
The CPU is the STM32F407 chips of 32 ARM series, and the A/D chip is the ADS1255 of 24Bit, described
Metal-oxide-semiconductor is IRF7413, the model 74HC154 of the hardware decoder, the model ACS712 of the current sensor.
The A/D chip by the RS485 ports of Phototube Coupling with computer by being connect.
Compared with prior art, the utility model has the advantages that：
1st, the utility model completes on-line measurement with relay and metal-oxide-semiconductor, first closes relay, is reclosed after delay
Metal-oxide-semiconductor avoids the shaky time of relay contact；During disjunction, first disjunction metal-oxide-semiconductor, then disjunction relay.By metal-oxide-semiconductor connect and
Disjunction high current, relay is only used as the gating circuit of isolation, so as to avoid the shake and arcing of relay contact, therefore
When being measured to the battery of larger capacity, which can preferably measure, and existing measuring circuit can due to arcing, tremble
The reasons such as dynamic to measure difficulty large error occur.The utility model avoids the shake of relay contact, and metal-oxide-semiconductor
Actuation time is short enough, so as to obtain more accurate data, isolates ohmic internal resistance and polarization resistance.
2nd, it is needing to there are during the charging of the battery of problem or undercharge, selecting the battery by relay, reclosing
Second metal-oxide-semiconductor, you can charge to the battery, reached equalizaing charge.
Description of the drawings
Fig. 1 is the circuit diagram of the accumulator group state on-line measurement circuit of the utility model；
Fig. 2 is the circuit diagram of the charging circuit of the utility model；
Fig. 3 is the circuit diagram of the voltage acquisition circuit of the utility model.
Specific embodiment
The utility model is further described with reference to embodiment.
Circuit diagram for the accumulator group state on-line measurement circuit embodiments of the utility model as shown in Figure 1, in figure only
It shows three single batteries of battery pack, since other single batteries and circuit for being attached thereto are repeat circuit, has been omitted from,
K1~K7 is relay in figure, and Bat01~Bat03 is the single battery of battery pack, and R57, R58 and Fu2's is combined as electric discharge electricity
Resistance group, U14 are current sensor, and U11 is the first metal-oxide-semiconductor.
The on-line measurement circuit be sequentially connected in series by discharge resistance group, chip current sensor U14 and the first metal-oxide-semiconductor U11 and
Into discharge measuring circuit, the model ACS712 of metal-oxide-semiconductor IRF7413, current sensor U14, from discharge resistance group terminate
Electrode line+the I gone outbatAnd negative line-the I terminated out from the first metal-oxide-semiconductor U11batOn, it has been separated respectively corresponding to accumulator
The positive wiring BatN1A and negative wiring BatN0A of the accumulator quantity N of group, in figure positive wiring BatN1A include positive wiring Bat11A,
Bat21A and Bat31A corresponds to battery setting respectively, bears wiring BatN0A and includes negative wiring Bat10A, Bat20A and Bat30A,
Battery setting is corresponded to respectively, and positive wiring and negative wiring connect respectively with the positive and negative electrode of corresponding single battery.
Discharge resistance group is：Two resistance R57 and R58 a fusible core Fu2, fusible core Fu2 and the chip in parallel of connecting again later
Current sensor U14 connections.The external fusible core Fu2 in two IP+ ports of chip current sensor U14, two IP- ports connection the
4 D ports, the Vcc ports of one metal-oxide-semiconductor connect operating voltage Vcc, Vo port and pulsed current signal output are connected after resistance R59
End, gnd ports connect pulsed current signal output terminal after capacitance C9.Three S ports of the first metal-oxide-semiconductor connect negative wiring
BatN0A, G port connect control signal.After being closed one group of route selection relay K and choosing battery, when reclosing the first metal-oxide-semiconductor, electric discharge
Resistance discharges to the battery of selection, current sensor U14 by by electric current be converted to compared with small-signal, other devices can be with
Current data is obtained by current sensor.
The contact switch controlled by route selection relay K is respectively equipped on positive wiring BatN1A and negative wiring BatN0A, is selected
Line relay K is each provided with control circuit, and control circuit is equipped with control signal.The control circuit of route selection relay K is：Control
Control base stage of the signal through base resistance connecting triode that end is come, it is the collector of Vcc operating voltages one end access triode, another
One end is followed by transistor base through resistance, and the emitter of triode is grounded after relay, is also parallel at the both ends of relay
Diode, cathode ground connection.
In electrode line+IbatWith negative line-IbatBetween access in parallel have by constant-current charging power and the series connection of the second metal-oxide-semiconductor and
Into charging circuit.It is illustrated in figure 2 the charging circuit of the embodiment, the positive and negative anodes connection Constant Electric Current of the right end of circuit in figure
Source, left end respectively with electrode line+IbatWith negative line-IbatConnection is equipped with fuse successively on the positive lead above the figure
Ful, the control circuit of relay K19 and relay K19, diode D22 are equipped with successively on the negative lead below the figure
The control circuit of second metal-oxide-semiconductor U10, relay K20 and relay K20, diode D23, the lower end outlet of the second metal-oxide-semiconductor U10
It holds in order to control.
After single battery is chosen by route selection relay K, disconnecting relay K19, K20 are closed, recloses the second metal-oxide-semiconductor
Can be that the single battery chosen charges, it can be achieved that the equalizaing charge of battery pack, can not be closed the first metal-oxide-semiconductor U11 at this time.
It is the STM32F407 chips of 32 ARM series that the on-line measurement circuit, which further includes controller CPU, CPU, and CPU passes through
Hardware decoder connects the control of the input terminal of the control circuit of each route selection relay K, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor respectively
End, model 74HC154, the CPU transmission of control signals of hardware decoder are needed to hardware decoder, then by hardware decoder control
The route selection relay K to be closed, hardware decoder provide hardware level interlocking, can ensure that by hardware decoder and select unique one
Group relay, so as to select the battery of needs, subsequently to provide channel, the detection isolating problem for solving series-connected batteries.
The on-line measurement circuit further includes A/D chip, and A/D chip is the ADS1255 of 24Bit, current sensor and voltage acquisition circuit point
It is not connect with A/D chip, A/D chip by the RS485 ports of Phototube Coupling with computer by being connect, current sensor and voltage
The data of acquisition circuit are transferred to computer by A/D chip.
The voltage acquisition circuit of the embodiment is illustrated in figure 3, is respectively connected at the company end of each single battery
PhotoMOSRELAYS CD-ROM driver U1~U4, the U35 in figure are A/D chip ADS1255, and U16 is hardware decoder 74HC154,
Input U1~U4 parts of the voltage acquisition circuit are existing technology.
Included the following steps with the method that above-mentioned on-line measurement circuit carries out accumulator group state on-line measurement：
Step 1 is closed the route selection relay K at single battery the two poles of the earth for needing to measure, remaining route selection relay K is equal at this time
For off-state, the initial voltage at the single battery the two poles of the earth chosen is obtained by voltage acquisition circuit；
Step 2, after the relay at single battery the two poles of the earth for needing to measure is closed, be delayed 20ms, recloses the first MOS
Pipe, so as to avoid the shaky time of relay contact so that data can be accurately measured later, hereafter, obtained by current sensor
Discharge current twice is taken, while discharge voltage, the time of acquisition are twice by voltage acquisition circuit acquisition：It is being closed first
A discharge current and discharge voltage are obtained in 1ms after metal-oxide-semiconductor, one is obtained again in 50ms after being closed the first metal-oxide-semiconductor
Secondary discharge current and discharge voltage.The combination of first metal-oxide-semiconductor and relay realizes moment open and close, so as to fulfill electricity
The on-line measurement in pond.
Step 3 is completed after obtaining discharge current and discharge voltage, disconnects the first metal-oxide-semiconductor；
Step 4 after cutting off high current by the first metal-oxide-semiconductor, then disconnects the relay of closure.
After discharge current and discharge voltage are by A/D chip, computer is conveyed to, computer passes through initial voltage, electric discharge electricity
Stream and discharge voltage calculate the ohmic internal resistance for the battery chosen and with reference to polarization resistances, so as to accurately measure cell batteries
Status data.
The balanced discharge that abnormal cell batteries are carried out with above-mentioned on-line measurement circuit includes the following steps：
Step 1 is closed the route selection relay K at the abnormal cell batteries the two poles of the earth for needing balanced discharge, at this time remaining route selection
Relay K is off-state, and the initial voltage at the single battery the two poles of the earth chosen is obtained by voltage acquisition circuit；
Step 2, after closure needs the relay at abnormal cell batteries the two poles of the earth of balanced discharge, be delayed 20ms, then closes
Close the first metal-oxide-semiconductor so that electric discharge and measurement can obtain precision data, pass through voltage acquisition circuit and obtain battery tension number
According to.
Step 3 after completing balanced discharge, disconnects the first metal-oxide-semiconductor；
Step 4 after cutting off high current by the first metal-oxide-semiconductor, then disconnects the relay of closure.
The equalizaing charge that abnormal cell batteries are carried out with above-mentioned on-line measurement circuit includes the following steps：
Step 1 is closed the route selection relay K at the abnormal cell batteries the two poles of the earth for needing balanced discharge, at this time remaining route selection
Relay K is off-state, and the initial voltage at the single battery the two poles of the earth chosen is obtained by voltage acquisition circuit；
Step 2, after being closed disconnecting relay K19, K20, be delayed 20ms, recloses the second metal-oxide-semiconductor U10, Constant Electric Current circulation
It crosses the access to charge to abnormal cell batteries, battery tension data is obtained by voltage acquisition circuit.
Step 3 after completing equalizaing charge, disconnects the second metal-oxide-semiconductor U10；
Step 4 after cutting off high current by the second metal-oxide-semiconductor, then disconnects the relay of closure.
Claims (8)
1. a kind of accumulator group state on-line measurement circuit, which is characterized in that including：
One discharge measuring being sequentially connected in series by discharge resistance group, chip current sensor (U14) and the first metal-oxide-semiconductor (U11)
Circuit, the electrode line (+I terminated out from the discharge resistance groupbat) and terminate out from first metal-oxide-semiconductor (U11) negative
Polar curve (- Ibat) on, separate respectively corresponding to the accumulator quantity N of the accumulator group positive wiring (BatN1A) and negative connect
Line (BatN0A) is respectively equipped on the positive wiring (BatN1A) and negative wiring (BatN0A) and is controlled by route selection relay (K)
Contact switch；The route selection relay is each provided with control circuit, and the control circuit is equipped with control signal；
One charging circuit being connected in series by constant-current charging power, disconnecting relay (K19, K20) and the second metal-oxide-semiconductor (U10), two
End access in parallel the electrode line (+Ibat) and negative line (- Ibat)；
One voltage acquisition circuit, parallel connection access the electrode line (+Vbat) and negative line (- Vbat)；
One controller CPU has the input that conducting wire connects the control circuit of each route selection relay by hardware decoder respectively
The control terminal at end, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor；
The positive wiring (BatN1A) and negative wiring (BatN0A) are being respectively connected to each accumulator of accumulator group just when measuring
Cathode.
2. accumulator group state on-line measurement circuit according to claim 1, it is characterised in that：The discharge resistance group
For：Two resistance (R57, R58) fusible core (Fu2) in parallel of connecting again later, the fusible core (Fu2) and chip current sensor
(U14) it connects.
3. accumulator group state on-line measurement circuit according to claim 2, it is characterised in that：The route selection relay
Control circuit be：Control base stage of the signal through base resistance connecting triode that control terminal is come, operating voltage (Vcc) one terminate
Enter the collector of the triode, the other end is followed by the transistor base through resistance, the emitter of the triode is through relay
It is grounded after device, diode, cathode ground connection is also parallel at the both ends of the route selection relay.
4. accumulator group state on-line measurement circuit according to claim 3, it is characterised in that：The chip current passes
The external fusible core (Fu2) in two IP+ ports of sensor (U14), two IP- ports connect 4 D ends of first metal-oxide-semiconductor
Mouth, Vcc ports connect operating voltage (Vcc), Vo ports and pulsed current signal output terminal, gnd ports warp are connected after resistance (R59)
Capacitance (C9) connects pulsed current signal output terminal afterwards.
5. accumulator group state on-line measurement circuit according to claim 4, it is characterised in that：First metal-oxide-semiconductor
Three S ports connect the negative wiring (BatN0A), G ports connect control signal.
6. accumulator group state on-line measurement circuit according to claim 5, it is characterised in that：The on-line measurement circuit
Further include A/D chip, the data of the current sensor and voltage acquisition circuit are transferred to computer by the A/D chip.
7. accumulator group state on-line measurement circuit according to claim 6, it is characterised in that：The CPU is 32 ARM
The STM32F407 chips of series, the A/D chip are the ADS125 of 24Bit, and the metal-oxide-semiconductor is IRF7413, the hardware decoding
The model 74HC154 of device, the model ACS712 of the current sensor.
8. accumulator group state on-line measurement circuit according to claim 7, it is characterised in that：The A/D chip by by
The RS485 ports of Phototube Coupling are connect with the computer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721605031.5U CN207601280U (en) | 2017-11-27 | 2017-11-27 | A kind of accumulator group state on-line measurement circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721605031.5U CN207601280U (en) | 2017-11-27 | 2017-11-27 | A kind of accumulator group state on-line measurement circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954839A (en) * | 2019-12-19 | 2020-04-03 | 肇庆理士电源技术有限公司 | Control method, system, equipment and storage medium for discharge detection of storage battery |
| CN111443298A (en) * | 2019-01-16 | 2020-07-24 | 奥迪股份公司 | Measuring assembly, high-voltage battery, motor vehicle and method for determining complex impedance |
| CN113471863A (en) * | 2020-03-31 | 2021-10-01 | 中国石油天然气集团有限公司 | Method for maintaining uninterrupted power supply of direct current screen of transformer substation |
-
2017
- 2017-11-27 CN CN201721605031.5U patent/CN207601280U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111443298A (en) * | 2019-01-16 | 2020-07-24 | 奥迪股份公司 | Measuring assembly, high-voltage battery, motor vehicle and method for determining complex impedance |
| CN111443298B (en) * | 2019-01-16 | 2022-07-22 | 奥迪股份公司 | Measuring assembly, high-voltage battery, motor vehicle and method for determining complex impedance |
| US11519968B2 (en) | 2019-01-16 | 2022-12-06 | Audi Ag | Measurement arrangement, high-voltage battery, motor vehicle and method for determining a complex impedance |
| CN110954839A (en) * | 2019-12-19 | 2020-04-03 | 肇庆理士电源技术有限公司 | Control method, system, equipment and storage medium for discharge detection of storage battery |
| CN113471863A (en) * | 2020-03-31 | 2021-10-01 | 中国石油天然气集团有限公司 | Method for maintaining uninterrupted power supply of direct current screen of transformer substation |
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