CN102466781B - High-accuracy storage battery detection device - Google Patents
High-accuracy storage battery detection device Download PDFInfo
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- CN102466781B CN102466781B CN201010535304.XA CN201010535304A CN102466781B CN 102466781 B CN102466781 B CN 102466781B CN 201010535304 A CN201010535304 A CN 201010535304A CN 102466781 B CN102466781 B CN 102466781B
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Abstract
The invention discloses a high-accuracy storage battery detection device, which comprises an input device for inputting the storage battery capacity of a storage battery to be detected, a microprocessor, a variable load unit and a state of charge detection unit, wherein the microprocessor has a first built-in detection mode decision-making program, and is electrically connected with the variable load unit and the state of charge detection unit; and when executing the detection mode decision-making program, the microprocessor reads the storage battery capacity of the storage battery to be detected from the input device, selects detection conditions comprising 1/N cold cranking Amps (CCA) and loading time according to the storage battery capacity, and determines a resistance value of the variable load unit according to the detection conditions. Therefore, the detection device can select a proper load resistance value and proper loading time according to different storage battery capacities to accurately judge the capacitance and aging state of the storage battery to be detected.
Description
Technical field
The present invention relates to a kind of storage battery detection device and method thereof, espespecially a kind of high-accuracy storage battery detection device.
Background technology
Because plumbous pond storage battery battery capacity is different on the market, but coordinate the storage battery detection device that detects storage battery residual capacity that single detection method is only provided, make testing result have a little error.
In general existing detection method is adopted 1/2CCA detection method more, being about to a detection load is connected across between storage battery anode electrode, storage battery is discharged to 1/2CCA (Cold cranking Amps), and continue 15 seconds, remove again on storage battery after load a period of time, repeat again to load 15 seconds, obtain afterwards several times the discharge curve of storage battery, judge that accordingly whether this storage battery is aging.Yet, because pull-up resistor value and the loading number of seconds of existing storage battery detection device are all fixed, therefore with the same terms, measure the storage battery of different battery capacities, the measurement curve that obtains will be not quite similar, concerning part storage battery, cannot provide measurement result accurately, be further improved.
Summary of the invention
Have the shortcoming of stating in view of this current storage battery detection device, fundamental purpose of the present invention is to provide and a kind ofly can changes along with the electric capacity of difference storage battery to be measured the high precision storage battery pick-up unit of testing conditions.
Wanting to reach the technical way that above-mentioned purpose used is to make this high-accuracy storage battery detection device include:
One input media, inputs the battery capacity of storage battery to be measured;
One microprocessor, inside has one first detecting pattern decision-making process;
One variable load unit, is electrically connected to this microprocessor, for being connected across between the positive and negative electrode of storage battery to be measured;
One state of charge detecting unit, is electrically connected to this microprocessor, and for being connected between the positive and negative electrode of this storage battery to be measured, to detect magnitude of voltage and the current value of storage battery to be measured between detection period, and this microprocessor is given in return;
The detecting pattern decision-making process of above-mentioned microprocessor reads the battery capacity to be measured that input media is obtained, then according to this battery capacity testing conditions (1/N CCA and load time), and according to testing conditions, determines the resistance value of variable load unit; Thus, pick-up unit of the present invention can be selected suitable pull-up resistor value and load time according to different battery capacities, for pick-up unit, accurately judges electric capacity and the ageing state thereof of storage battery to be measured.
Above-mentioned variable load unit is a variable resistor, or a programmable variable resistor.
Above-mentioned variable load unit is by change-over switch, to be formed in parallel respectively by a plurality of resistance, and change-over switch system is electrically connected to this microprocessor again.
The resistance that above-mentioned variable load unit comprises a plurality of serial connections and a plurality of change-over switch, each switch is connected to tandem junction node and microprocessor.
Accompanying drawing explanation
Fig. 1: storage battery detection device outside drawing of the present invention.
Fig. 2: the circuit block diagram of the first preferred embodiment of storage battery detection device of the present invention.
Fig. 3: for the process flow diagram of the first detecting pattern decision-making process of Fig. 1.
Fig. 4: Fig. 1 variable load unit is a variable-resistance circuit diagram.
Fig. 5 A: the circuit diagram that Fig. 1 variable load unit is a plurality of parallel resistances.
Fig. 5 B: Fig. 1 variable load unit is the rheostatic circuit diagram of programmable.
Fig. 5 C: the circuit diagram that Fig. 1 variable load unit is a plurality of resistance in seriess.
Fig. 6: for the process flow diagram of the first detecting pattern decision-making process of Fig. 5 A and 5B.
Fig. 7: detection curve figure of the present invention.
Fig. 8: trace routine process flow diagram of the present invention.
Main element symbol description
10 shell 11 input medias
12 detect wire 13 displays
14 computer connecting interface 15 warning horns
20 microprocessor 21 variable load unit
211 switch 21a variable resistors
21b resistor 21c change-over switch
21d one-to-many multiplexer 21e programmable rheostat
21f impact damper 22 state of charge detecting units
30 storage battery 31 electrodes
Embodiment
First referring to shown in Fig. 1 and Fig. 2, is the first preferred embodiment of high-accuracy storage battery detection device of the present invention, and it includes:
One shell 10, is provided with an input media 11 and two in shell 10 and detects wire 12; Wherein this input media is in order to input the battery capacity of storage battery 30 to be measured, and detects wire 12 in order to be connected on the positive and negative electrode 31 of storage battery 30 to be measured; In the present embodiment, this two detections wire 12 is located on the positive and negative electrode 31 of storage battery to be measured; In addition, this shell also can further be provided with a display 13 and a computer connecting interface 14 and a warning horn 15;
One microprocessor 20, inside has one first detecting pattern decision-making process;
One variable load unit 21, is electrically connected to this microprocessor 20, for being connected across between the positive and negative electrode 31 of storage battery 30 to be measured;
One state of charge detecting unit 22, is electrically connected to this microprocessor 20, and for being connected between the positive and negative electrode 31 of this storage battery 30 to be measured, to detect magnitude of voltage and the current value of storage battery 30 to be measured between detection period, and this microprocessor 20 is given in return.
Shown in Fig. 3, the first detecting pattern decision-making process of above-mentioned microprocessor 20 includes following steps:
Read the battery capacity (CCA to be measured that input media is obtained
b) and voltage (V
b) and input testing conditions, wherein this testing conditions includes 1/N CCA and load time (S10); Wherein N is natural number;
By battery capacity CCA to be measured
b, magnitude of voltage V
band testing conditions brings in pull-up resistor calculating formula, calculate and determine the resistance value (S11) of this variable load unit; In the present embodiment, this pull-up resistor calculating formula is:
and
Carry out trace routine, to obtain a detection curve (S12).
Above-mentioned this tunable load unit 21 includes a variable resistor 21a and a switch 211, as shown in Figure 4, its two end is connected to respectively and detects wire 12, it is adjusted end and is connected to microprocessor 20, by microprocessor 20, adjust its resistance value, this microprocessor 20 is controlled and is series at variable resistor 21a and detects the switch 211 between wire 12 again.
For instance, wish detects the storage battery to be measured of a 12V/1000CCA, and user selects to load detection with 1/2CCA by input media, and now this microprocessor is obtained CCA by input media
b=1000CCA, V
b=12V, 1/N CCA=1/2CCA, bringing pull-up resistor calculating formula into, can to try to achieve pull-up resistor value be 0.024 ohm, and now this microprocessor controls the adjustment end of variohm, and making two detection wires be connected to resistance value is the variable resistor of 0.024 ohm.
Lift an example, wish detects the storage battery to be measured of a 12V/900CCA again, and user selects to load detection with 1/3CCA by input media, and now this microprocessor 20 is obtained CCA by input media 11
b=900CCA, V
b=12V, 1/N CCA=1/3CCA, bringing pull-up resistor calculating formula into, can to try to achieve pull-up resistor value be 0.04 ohm, now this microprocessor 20 controls the adjustment end of variohm 21a, and making two detection wires 12 be connected to resistance value is the variable resistor 21a of 0.04 ohm.
From above two examples, the variable load unit 21 that the present invention first preferably implements can be according to the difference of battery capacity, and changes the resistance value detecting with load.
Shown in Fig. 5 A, for above-mentioned variable load unit 21 can include a plurality of resistor 21b and change-over switch 21c, each resistor 21b one end is connected to wherein and one detects wire 12, the other end is connected to another by a change-over switch 21c and detects wire 12, and is subject to this microprocessor 20 drive and determine that whether detecting wire 12 with another is connected; Thus, when microprocessor 20 calculates after pull-up resistor, control one of them or several change-over switch 21c, its corresponding contact resistance device 21b is connected to and detects wire 12.If drive two above change-over switch 21c to close simultaneously, represent that its corresponding resistor 21b is connected in parallel, the whole resistance value that detects load that reduces.Otherwise, improve the resistance value that detects load.Again as shown in Figure 5 B, this variable load unit includes a programmable rheostat 21e and a switch 211, wherein two ends of this programmable rheostat 21e connect respectively detection wire 12, and its control end is connected directly to this microprocessor 20, by microprocessor, directly adjust programmable rheostat 21e resistance value, and microprocessor 20 is controlled again the switch 211 that is serially connected with programmable rheostat 21e and detects between wire 12 and is opened and closed, to determine whether allow programmable rheostat 21e load on storage battery to be measured; In addition, this programmable rheostat 21e also can be connected to this microprocessor 20 by an impact damper 21, is adjusted the resistance value of this programmable rheostat 21e by this microprocessor 20 by impact damper 21f.For instance, make the resistance value homogeneous phase of each resistor 21b be all 0.08 ohm, wish detects the storage battery to be measured 30 of a 12V/750CCA, and user selects to load detection with 1/2CCA and 15 second load time by input media 11.
The resistor 21b that comprises a plurality of same resistance values due to the variable load unit 21 of the present embodiment forms, therefore the change-over switch 21c that controls one resistor 21b closes, or control one-to-many multiplexer 21d switches to single resistor 21a, so that single 0.08 ohmic resistor is connected and detects wire 12, and detect by this state of charge detecting unit the current value that now 12V storage battery 30 produces, making it is 100A.Afterwards, this microprocessor 20 can this electric current be basis, calculates current battery capacity to be measured under the selected testing conditions of user, and its pull-up resistor value is why, and computation process is as follows:
Calculate the quantity of using 0.08 ohmic resistor 21a:
[750* (1/2)]/100=3.75 (individual)
Calculating is with the testing conditions of 1/2CCA and 15 seconds, and total detected energy is:
[750* (1/2)] * 15=5625 (ampere one second)
3.75 resistor 21a also cannot be selected in above-mentioned variable load unit 21, therefore can only select 3 resistor 21a, therefore must readjust the load time (former 15 seconds) of testing conditions, and the new load time is:
5625/300=18.75 (second).
In the present example, when this microprocessor 10 carries out trace routine, when loading, controlling three change-over switch 21b closes, make three resistor 21a in parallel, make two detection wires 12 be connected to three resistor 21a in parallel and reach 18.75 seconds, when unloading, three change-over switch 21b are closed and opened again.
Shown in Fig. 5 C, for a plurality of resistor 21b of above-mentioned variable load unit 21 also can adopt and be connected in series, wherein one end of resistors in series 21b is connected to wherein one and detects wire 12, and another detects between each series connection node of wire 12 and a plurality of resistors in series 21b and is connected by an one-to-many multiplex (MUX) switch 21d; The control end of this one-to-many multiplex (MUX) switch 21d is connected to this microprocessor 20 again, to determine being connected to two detection wires 12 with several resistors in series 21b.
For instance, make the resistance value homogeneous phase of each resistor 21b be all 0.08 ohm, wish detects the storage battery to be measured 30 of a 12V/1000CCA, and user selects to load detection with 1/2CCA and 15 second load time by input media 11.
The resistor 21b that comprises a plurality of same resistance values due to the variable load unit 21 of the present embodiment forms, therefore controlling one-to-many multiplexer 21d switches to single resistor 21a, so that single 0.08 ohmic resistor connect is detected to wire 12, and by this state of charge detecting unit, to detect the current value that now 12V storage battery 30 produces be 12/0.08=150A.This microprocessor 20 can this electric current be basis, calculates current battery capacity to be measured under the selected testing conditions of user, and its pull-up resistor value is why, and computation process is as follows:
1000/2*15=7500 (ampere-second);
7500/150=50 second.
In the present example, these microprocessor 10 trace routines can be when loading, control the tandem node that one-to-many multiplex (MUX) switch 21d switches to single resistor 21a, make two detection wires 12 be connected to the resistor 21a of a series connection, and adjust 15 second load time of former setting to extend to for 50 load times, carry out aging detection.
Again, wish is surveyed 12v/100CCA storage battery 30, and select 3 series resistor devices (3*0.08=0.24 ohm) to measure, first measuring its out-put supply is: 12/0.24=50 (ampere), this microprocessor 20 can this electric current be basis, calculate current battery capacity to be measured under the selected testing conditions of user, its pull-up resistor value is why, and computation process is as follows:
100/2*15=750 (ampere);
750/50=15; It is exactly just 1/2CCA15 second, therefore needn't adjust the load time.
In the present example, these microprocessor 10 trace routines can be controlled the tandem node that one-to-many multiplex (MUX) switch 21d switches to three resistors in series 21a when loading, and the resistor 21a that makes two detection wires 12 be connected to three series connection reaches 15 seconds and carries out aging detection.
As shown in the above description, this microprocessor 20 is applied in the present embodiment, and its first detecting pattern decision-making process includes following steps, and refers to shown in Fig. 6:
Read the battery capacity (CCA to be measured that input media is obtained
b) and voltage (V
b) and input testing conditions (1/N CCA) (S20);
Control at least one change-over switch and close, make at least one resistance connect two and detect wire, to obtain the output current value (S21) of storage battery to be measured; Known in above-mentioned example, changeable single change-over switch is closed or several change-over switch is closed, to obtain suitable output current value;
Take the output current value that detects as basis, calculate required number of resistors, wherein this number of resistors calculating formula is:
(S22);
According to testing conditions (1/N CCA and load time), bring total detection time of calculating formula into: (CCA
b* 1/N) * T
lOAD(S23);
According to number of resistors, adjust the load time (S24) of testing conditions; And
Carry out trace routine, to obtain a detection curve (S25).
As shown in the above description, the variable load unit 21 of the present embodiment adopts a plurality of resistor 21a to coordinate change-over switch 21b, with above-mentioned the first detecting pattern decision-making process step, calculate final testing conditions and pull-up resistor value, according to storage battery 30 capability value sizes to be measured equally, carry out testing conditions correction and select suitable pull-up resistor value, make microprocessor 20 detection curve be detected according to the storage battery 30 to different capabilities, more accurately judge its ageing state and health status.
Please further coordinate and consult shown in Fig. 7 and Fig. 8, for above-mentioned microprocessor is carried out the curve map of the detection curve obtaining after trace routine, general storage battery detects full charging in advance, then storage battery to be measured is carried out once to pre-loaded and unloading action (S40), makes battery cell discharge to certain wattage V
e2(S41), detect when avoiding floating charging.After end, the testing conditions just calculating with above-mentioned arbitrary embodiment detects, and loads equally and unload action (S42), and test constantly record voltage and the curent change of storage battery, finally obtains detection curve.
In sum, storage battery detection device of the present invention can adjust most suitable testing conditions according to different capabilities storage battery, when carrying out actual trace routine, can guarantee that storage battery to be measured discharges the enough power of its health status of judgement, detects precision and promote it.
Claims (8)
1. a high-accuracy storage battery detection device, includes:
One shell, is provided with an input media and two in shell and detects wire; Wherein this input media is in order to input the battery capacity of storage battery to be measured, and detects wire in order to be connected on the positive and negative electrode of storage battery to be measured;
One microprocessor, inside has one first detecting pattern decision-making process;
One variable load unit, is electrically connected to this microprocessor, for being connected across between the positive and negative electrode of storage battery to be measured;
One state of charge detecting unit, is electrically connected to this microprocessor, and for being connected between the positive and negative electrode of this storage battery to be measured, to detect magnitude of voltage and the current value of storage battery to be measured between detection period, and this microprocessor is given in return;
The first detecting pattern decision-making process of above-mentioned this microprocessor includes following steps:
Read the battery capacity CCA to be measured that input media is obtained
band voltage V
band input testing conditions, testing conditions includes 1/N CCA;
Battery capacity to be measured, magnitude of voltage and testing conditions are brought in pull-up resistor calculating formula, calculated and determine the resistance value of this variable load unit; And
Carry out trace routine, to obtain a detection curve figure.
2. high-accuracy storage battery detection device according to claim 1, in the first detecting pattern decision-making process of described this microprocessor, this pull-up resistor calculating formula is:
wherein N is natural number.
3. high-accuracy storage battery detection device according to claim 1, this variable load unit can include a plurality of resistance and change-over switch, each resistance one end is connected to wherein and one detects wire, the other end is connected to another by a switch and detects wire, and is subject to this microprocessor driven and determines that whether detecting wire with another is connected.
4. high-accuracy storage battery detection device according to claim 1, this variable load unit includes a plurality of resistance and change-over switch, wherein a plurality of resistors adopt and are connected in series, and one end of resistors in series is connected to wherein one and detects wire, and another detects between each series connection nodes of wire and a plurality of resistors in seriess and is connected by an one-to-many multiplex (MUX) switch; The control end of this one-to-many multiplex (MUX) switch is connected to this microprocessor again.
5. high-accuracy storage battery detection device according to claim 1, this variable load unit comprises:
One programmable rheostat, its two end connects respectively two detection wires, for storage battery to be measured, connects, and one control end is connected to this microprocessor, by this microprocessor, directly adjusts the rheostatic resistance value of this programmable; And
One switch, is serially connected with this programmable rheostat and detects between wire, and being electrically connected to this microprocessor, by microprocessor gauge tap, is opened and closed.
6. high-accuracy storage battery detection device according to claim 1, this variable load unit comprises:
One programmable rheostat, its two end connects respectively two detection wires, for storage battery to be measured, connects; And
One impact damper, is connected between this programmable rheostat and microprocessor, by this microprocessor, by impact damper, adjusts the rheostatic resistance value of this programmable; And
One switch, is serially connected with this programmable rheostat and detects between wire, and being electrically connected to this microprocessor, by microprocessor gauge tap, is opened and closed.
7. high-accuracy storage battery detection device according to claim 2, this microprocessor is carried out trace routine and is included:
Full charging storage battery to be measured is carried out once to pre-loaded and unloading action, make it be discharged to a default wattage; And
With final testing conditions, load and unload, and test constantly record voltage and the curent change of storage battery, detection curve finally obtained.
8. high-accuracy storage battery detection device according to claim 1, this shell also can further be provided with a display and a computer connecting interface and a warning horn.
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| CN109596988B (en) * | 2018-11-30 | 2021-12-24 | 西安航天计量测试研究所 | Intelligent water meter battery capacity monitoring method and device |
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