CN204302394U - A kind of storage battery unit cell internal resistance automatic detection circuit - Google Patents
A kind of storage battery unit cell internal resistance automatic detection circuit Download PDFInfo
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- CN204302394U CN204302394U CN201420842566.4U CN201420842566U CN204302394U CN 204302394 U CN204302394 U CN 204302394U CN 201420842566 U CN201420842566 U CN 201420842566U CN 204302394 U CN204302394 U CN 204302394U
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Abstract
The utility model relates to a kind of batteries monomer internal resistance detection technical field, discloses a kind of storage battery unit cell internal resistance automatic detection circuit.It comprises cpu central processing unit unit, synchronizing signal generating unit, relay drive integrated circult unit, accumulator internal resistance acquisition testing unit, single battery switch circuit units, cpu central processing unit unit sends instruction by synchronizing signal generating unit, internal resistance detection is carried out to a certain cell, this instruction is performed by single battery switch circuit units, internal resistance acquisition testing unit receive synchronizing signal by Real-time Collection to internal resistance of single cell infomation detection quantize and be transferred to cpu central processing unit unit, cpu central processing unit unit can complete the display of internal resistance of cell information, store, scientific basis is provided for attendant grasps each cell performance of batteries in time.Adopt same detection Acquisition Circuit owing to detecting at every turn, avoid the Acquisition Error that the internal resistance of cell detects.
Description
Technical field
The utility model relates to the automatic detection field of batteries monocell internal resistance, specifically each cell in batteries is carried out to a kind of batteries monocell internal resistance automatic detection circuit of timesharing internal resistance signal acquisition testing successively.
Background technology
The system dc back-up source application the most non-maintaining valve controlled sealed lead-acid accumulators such as current China electric power, communication.Use a period of time, battery just there will be deterioration in various degree, shows as accumulator capacity and significantly reduces.For the deteriorated problem of battery, what taked in the past is solve the mode of the overall property the checked electric discharge of batteries.Many industries are if power industry, communications industry battery service regulations stipulate are to the battery not reaching rated capacity, carrying out after three property checked put charging, capacity does not still reach more than 80% of rated capacity, is considered as battery and scraps, and the mode only taking whole group of battery to change solves.
But in fact cause lead-acid accumulator deterioration main cause to be exactly difference due to single battery uniformity each in batteries.Analyze its underlying causes, be exactly the difference of each single battery uniformity in batteries when causing charging " full starve " uneven (battery after electric discharge is not as filled full will generation " sulfuration " in time), a few joint single batteries of " starving " in batteries are because filling insatiable hunger " sulfuration ", the accumulator internal resistance of " sulfuration " increases, this just makes with the difference of other each batteries in group larger, each monomer in lack of homogeneity → charging " full starve " uneven → " sulfuration " → uniformity is poorer → and " sulfuration " increase the weight of, form vicious circle, battery capacity cumulative bad in discharge and recharge use procedure is declined, the basic reason that lead-acid accumulator degradation speed that Here it is is too fast.Therefore only have electrical characteristics such as the internal resistance often saving cell in accurate grasp batteries to change, the problem of battery rapid degradation could be solved with a definite target in view.
Theory analysis and great many of experiments all prove, battery-operated state and estimate that service life and internal resistance have close relationship, accumulator monitoring equipment and the battery condition analytical equipment of external use are at present all take accumulator internal resistance as leading indicator, in conjunction with rate of change and the historical data of accumulator internal resistance, set up expert system, online evaluation is entered to battery condition, estimates its service life.Current China electric power, communications industry back-up source adopt lead-acid accumulator mostly.Its internal resistance of this kind of battery is extremely small, is tens to hundreds of micro-ohm, and even the contacting weight and all can impact measurement result of test pencil when the tightness of joint and measurement, thus makes traditional resistive measurement be difficult to reach measurement requirement.
Utility model content
The purpose of this utility model is to provide a kind of storage battery unit cell internal resistance automatic detection circuit, the problem of the metrical error easily occurred during to solve and to detect internal resistance of single cell in batteries.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of storage battery unit cell internal resistance automatic detection circuit, it comprises cpu central processing unit unit, relay drive integrated circult unit, internal resistance acquisition testing unit, single battery switch circuit units, it also comprises synchronizing signal generating unit, the input of described synchronizing signal generating unit is connected with described cpu central processing unit unit, the output of described synchronizing signal generating unit respectively with described relay drive integrated circult unit, the input of internal resistance acquisition testing unit is connected, the output of described relay drive integrated circult unit is connected with the input of described single battery switch circuit units, an output of described single battery switch circuit units is connected with described internal resistance acquisition testing unit input, described another output of single battery switch circuit units is connected with the two ends of each cell of batteries, the output of described internal resistance acquisition testing unit is connected with described cpu central processing unit unit by serial interface communication line, described cpu central processing unit unit sends signal to described relay drive integrated circult unit and internal resistance acquisition testing unit by synchronizing signal generating unit simultaneously, single battery switch circuit units is made to carry out action, for online internal resistance detection operation is carried out in each cell timesharing of batteries successively, the internal resistance signal detection of the single battery collected quantizes and is transferred to described cpu central processing unit unit by described internal resistance acquisition testing unit, and cpu central processing unit unit reads the internal resistance data of measured battery by internal resistance acquisition testing unit serial ports.
As further improvement of the utility model, described synchronizing signal generating unit is built in cpu central processing unit unit.
Further improve as of the present utility model, described relay drive integrated circult unit is connected with several photoelectric isolating circuit, prevents the reverse transmission of storage battery signal.
Further improve as of the present utility model, described photoelectric isolating circuit is connected with described cpu central processing unit unit, the input of described battery detecting change-over circuit is connected with described cpu central processing unit unit by a circuit of described photoelectric isolating circuit, the output of described battery detecting change-over circuit is connected with internal resistance acquisition testing unit with described single battery switch circuit units respectively by relay, described cpu central processing unit unit comes to control described single battery switch circuit units by the folding of relay, the operation of internal resistance sample detecting is carried out successively to each cell timesharing of described batteries.
Further improve as of the present utility model, the quantity of described photoelectric isolating circuit is more than the quantity of the cell of composition batteries, and the photoelectric isolating circuit had more is for the reverse signal isolation of battery detecting change-over circuit and passing through of forward signal.
The beneficial effects of the utility model are:
The utility model adopts online detection operating type, detection signal output line connects positive and negative the two poles of the earth of the every batteries of batteries respectively, can realize detecting the often joint internal resistance of single cell of batteries, therefore, it is possible to grasp the electrical property difference of each cell of batteries in time, find the individual monomers battery causing batteries whole volume to decline, thus be solve battery deterioration problem targetedly.
No longer needing artificial wiring after the utility model access batteries, is all carry out under the same conditions owing to detecting at every turn, because this reducing the maintenance workload of artificial metrical error and battery.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is the utility model using state wiring schematic diagram;
Fig. 3 is battery detecting conversion circuit unit circuit diagram in the utility model;
Fig. 4 is the utility model repeat circuit drive integrated circult element circuit schematic diagram;
Fig. 5 is single battery switch circuit units circuit diagram in the utility model;
Fig. 6 is that the utility model embodiment uses wiring diagram.
In figure: 1, cpu central processing unit unit, 2, synchronizing signal generating unit, 3, relay drive integrated circult unit, 4, internal resistance acquisition testing unit, 5, single battery switch circuit units, 6, batteries, 7, electrical equipment, 8, rectifier, 21, battery detecting change-over circuit, 31, photoelectric isolating circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
A kind of storage battery unit cell internal resistance automatic detection circuit as shown in Figures 1 to 6, it comprises cpu central processing unit unit 1, relay drive integrated circult unit 3, internal resistance acquisition testing unit 4, single battery switch circuit units 5, it also comprises synchronizing signal generating unit 2, the input of synchronizing signal generating unit 2 is connected with cpu central processing unit unit 1, the output of synchronizing signal generating unit 2 respectively with relay drive integrated circult unit 3, the input of internal resistance acquisition testing unit 4 is connected, the output of relay drive integrated circult unit 3 is connected with the input of single battery switch circuit units 5, an output of single battery switch circuit units 5 is connected with internal resistance acquisition testing unit 4 input, another output of single battery switch circuit units 5 is connected with the two ends of each cell of batteries 6, the output of internal resistance acquisition testing unit 4 is connected with cpu central processing unit unit 1 by serial interface communication line, cpu central processing unit unit 1 sends signal to relay drive integrated circult unit 3 and internal resistance acquisition testing unit 4 by synchronizing signal generating unit 2 simultaneously, single battery switch circuit units 5 is made to carry out action, for online internal resistance detection operation is carried out in each cell timesharing of batteries 6 successively, the internal resistance signal detection of the single battery collected quantizes and is transferred to cpu central processing unit unit 1 by internal resistance acquisition testing unit 4, and cpu central processing unit unit 1 reads the internal resistance data of measured battery by internal resistance acquisition testing unit 4 serial ports.
In this testing circuit, synchronizing signal generating unit 2 is built in cpu central processing unit unit 1.
Relay drive integrated circult unit 3 is connected with several photoelectric isolating circuit 31, prevents the reverse transmission of storage battery signal.The quantity of each cell of the number ratio composition batteries 6 of photoelectric isolating circuit 31 is many, and the photoelectric isolating circuit 31 had more is for passing through the reverse signal isolation of battery detecting change-over circuit 21 and forward signal.
As shown in Figure 2, batteries 6 by n batteries BT1, BT2 ..., BTn is connected in series, the utility model be provided with n+1 bar detection line L1, L2 ..., Ln+1 be added in respectively batteries 6 n single battery BT1, BT2 ..., BTn two ends.
In the utility model, the circuit structure of battery detecting conversion circuit unit 21 as shown in Figure 3.
In the utility model, internal resistance acquisition testing unit 4 is general accumulator internal resistance tester, and cpu central processing unit unit 1 reads the internal resistance data of measured battery from internal resistance acquisition testing unit 4 i.e. TXD and the RXD mouth of accumulator internal resistance tester by its serial ports RXD1-BC and TXD1-BC.
The structure of the utility model repeat circuit drive integrated circult unit 3 as shown in Figure 4,2 ends of photoelectric isolating circuit 31 in the OUT1 map interlinking 4 of being drawn by the 14th pin of cpu central processing unit unit 1 in Fig. 3, the 1B pin OUTC1 of the U38 of 4 relay termination drive integrated circults 3 of photoelectric isolating circuit 31.
Batteries is saved for 2V24, in the utility model, the structure of single battery switch circuit units 5 as shown in Figure 5, the D1 signal input part JD1 of single battery commutation circuit 5 in the JD1 map interlinking 5 of being drawn by the 1C pin of the U38 of Fig. 4 repeat circuit drive integrated circult unit 3, the relay output end 4,3 of single battery switch circuit units 5 is connected to the positive and negative electrode two ends of batteries 6 Section 1 battery BT1 respectively.In Fig. 5 each output 4,3 of 24 relays connect respectively the every batteries BT1 of batteries 6, BT2 ..., BT24 positive and negative electrode two ends.In Fig. 5, relay input BT+, BT-of single battery switch circuit units 5 are connected with relay output end BT+, BT-of battery detecting change-over circuit 21 in Fig. 3 respectively.
Wherein the OUT1 of cpu central processing unit unit 1 passes through the relay drive integrated circult unit 3 of Fig. 4, control signal is inputted the relay input JD1 of the single-unit battery switch circuit units 5 of Fig. 5, JD1 relay 3,4 adhesive of the single battery switch circuit units 5 in control chart 5, cell BT1 is cut circuit, and other cell circuits are cut off.The OUT1 to OUT26 that in Fig. 3, cpu central processing unit unit 1 is drawn, be connected with the Phototube Coupling input circuit 31 of 26 in Fig. 4,26 outputs in 26 photoelectric isolating circuits 31 are connected with 26 input OUTC1 to OUTC26 of the U38 to U41 of Fig. 4 repeat circuit drive integrated circult unit 3, and 24 output JD1 to JD24 of the U38 to U41 of relay drive integrated circult unit 3 are connected with 24 relay input JD1 to JD24 of battery switch circuit units 5 single in Fig. 5.The relay J D25 of battery detecting change-over circuit 21 in Fig. 4 repeat circuit JD25 control chart 3,1, the 2 end adhesives of Fig. 3 repeat circuit JD25, internal resistance collecting unit 4 gathers the end internal resistance of corresponding cell in the batteries 6 of Fig. 5 repeat circuit 3,4 end adhesive by BT+, BT-end.Internal resistance sampling controls timesharing by cpu central processing unit unit 1 equally and gathers successively.
JD26 is duplicate relay, controls for other.
This 26 road signal controls by cpu central processing unit unit 1, wherein the OUT1 to OUT24 of cpu central processing unit unit 1 is by the U38 to U41 in 24 photoelectric isolating circuits 31 and relay drive integrated circult unit 3, 24 control signals are inputted respectively 24 relay input JD1 to JD24 of the single battery switch circuit units 5 of Fig. 5, 24 relay J D1 to JD24 wherein in single battery switch circuit units 5 control (to pass through BT+ by battery detecting change-over circuit in Fig. 3 respectively, BT-termination enters the relay BT+ of the single battery switch circuit units 5 of Fig. 5, BT-holds) timesharing connects successively, be only once that in Fig. 5, wherein 1 cell of batteries 6 detects internal resistance.
Fig. 6 is that the utility model embodiment saves the use wiring diagram of storage battery unit cell internal resistance detection to 2V24, and a playscript with stage directions utility model can be that 24 joint 2V batteries 6 detect internal resistance of single cell simultaneously.
In the present embodiment, batteries is 24 joint cells, each internal resistance of single cell is 2V, the chip used model of cpu central processing unit unit is STM32F103R8 (B) T6, and the chip used model of relay drive integrated circult unit is: ULN2003.Utilize operation principle of the present utility model, the batteries that the utility model can be designed to the various combinations of different single battery internal resistances (as 2V, 12V etc.) and different joint number (as 18 joints, 24 joints, 56 joints etc.) carries out online internal resistance of single cell detection.
Claims (5)
1. a storage battery unit cell internal resistance automatic detection circuit, it comprises cpu central processing unit unit (1), relay drive integrated circult unit (3), internal resistance acquisition testing unit (4), single battery switch circuit units (5), it is characterized in that: it also comprises synchronizing signal generating unit (2), the input of described synchronizing signal generating unit (2) is connected with described cpu central processing unit unit (1), the output of described synchronizing signal generating unit (2) respectively with described relay drive integrated circult unit (3), the input of internal resistance acquisition testing unit (4) is connected, the output of described relay drive integrated circult unit (3) is connected with the input of described single battery switch circuit units (5), an output of described single battery switch circuit units (5) is connected with described internal resistance acquisition testing unit (4) input, another output of described single battery switch circuit units (5) is connected with the two ends of each cell of batteries (6), the output of described internal resistance acquisition testing unit (4) is connected with described cpu central processing unit unit (1) by serial interface communication line, described cpu central processing unit unit (1) sends signal to described relay drive integrated circult unit (3) and internal resistance acquisition testing unit (4) by synchronizing signal generating unit (2) simultaneously, single battery switch circuit units (5) is made to carry out action, for online internal resistance detection operation is carried out in each cell timesharing of batteries (6) successively, the internal resistance signal detection of the single battery collected quantizes and is transferred to described cpu central processing unit unit (1) by described internal resistance acquisition testing unit (4), and cpu central processing unit unit (1) reads the internal resistance data of measured battery by internal resistance acquisition testing unit (4) serial ports.
2. a kind of storage battery unit cell internal resistance automatic detection circuit according to claim 1, is characterized in that: described synchronizing signal generating unit (2) is built in cpu central processing unit unit (1).
3. a kind of storage battery unit cell internal resistance automatic detection circuit according to claim 1, is characterized in that: described relay drive integrated circult unit (3) is connected with several photoelectric isolating circuit (31), prevents the reverse transmission of storage battery signal.
4. a kind of storage battery unit cell internal resistance automatic detection circuit according to claim 3, it is characterized in that: described photoelectric isolating circuit (31) is connected with described cpu central processing unit unit (1), the input of described battery detecting change-over circuit (21) is connected with described cpu central processing unit unit (1) by a circuit of described photoelectric isolating circuit (31), the output of described battery detecting change-over circuit (21) is connected with internal resistance acquisition testing unit (4) with described single battery switch circuit units (5) respectively by relay, described cpu central processing unit unit (1) comes to control described single battery switch circuit units (5) by the folding of relay, the operation of internal resistance sample detecting is carried out successively to each cell timesharing of described batteries (6).
5. a kind of storage battery unit cell internal resistance automatic detection circuit according to claim 4, it is characterized in that: the quantity of described photoelectric isolating circuit (31) is more than the quantity of the cell of composition batteries (6), and the photoelectric isolating circuit had more (31) is for passing through the reverse signal isolation of battery detecting change-over circuit (21) and forward signal.
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| CN201420842566.4U CN204302394U (en) | 2014-12-26 | 2014-12-26 | A kind of storage battery unit cell internal resistance automatic detection circuit |
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| CN201420842566.4U CN204302394U (en) | 2014-12-26 | 2014-12-26 | A kind of storage battery unit cell internal resistance automatic detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017111751A1 (en) * | 2015-12-21 | 2017-06-29 | Okan Universitesi | Internal resistance measurement method for power supplies like batteries or supercapacitors |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017111751A1 (en) * | 2015-12-21 | 2017-06-29 | Okan Universitesi | Internal resistance measurement method for power supplies like batteries or supercapacitors |
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