CN210051867U - Storage battery open circuit alarm device - Google Patents
Storage battery open circuit alarm device Download PDFInfo
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- CN210051867U CN210051867U CN201920733180.2U CN201920733180U CN210051867U CN 210051867 U CN210051867 U CN 210051867U CN 201920733180 U CN201920733180 U CN 201920733180U CN 210051867 U CN210051867 U CN 210051867U
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Abstract
The utility model discloses a battery alarm device that opens a way, the device includes square wave signal generator, the battery pack module, discriminator and alarm output circuit, square wave signal generator receives mains voltage, and based on mains voltage produces the square wave signal that has certain duty cycle, square wave signal generator exports square wave signal to discriminator via the battery pack module, the discriminator produces alarm signal according to frequency, phase place, the amplitude among the square wave signal, discriminator output alarm signal to alarm output circuit. The utility model discloses a battery open circuit alarm problem among the battery exempts from to dismantle bridging bypass device has effectively been solved to the device, possesses fast, accurate, reliable, characteristics such as interference immunity is strong, can reduce field work personnel's the working strength and the operation degree of difficulty, eliminates great equipment operation potential safety hazard.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a battery discharge maintains technical field, and is concrete, relates to a battery alarm device that opens a way.
[ background of the invention ]
When a plurality of non-adjacent lagging batteries appear in the storage battery pack of the direct current system, in order to prevent the problem that the lagging batteries are opened or the capacity is too low, the internal resistance is too high, the voltage of the battery pack is reduced, and the battery pack cannot carry load, meanwhile, the lagging batteries need to be disassembled on site, and then the battery pack is connected with a loop to continue discharging, so that the time-consuming and labor-consuming disassembly process is complex, great accident risk exists, and no safe and effective protection means exists, and therefore, a disassembly-free cross-over bypass device for any lagging storage batteries in the whole group needs to be developed.
One of the important problems is that due to the complex operation conditions of the storage battery, an extreme condition of open circuit occurs, and regulations stipulate that the battery pack must be connected to the charger to prevent accidents, so that the open circuit of the battery cannot be found in time no matter whether the voltage or the current is measured, and once the charger fails, the open circuit of the storage battery must lead to the loss of power of a control bus load, and major accident potential exists.
In addition, open-circuit batteries are often scrapped, internal polar plates are seriously corroded, contact resistance is large, internal heating and even explosion are easily caused by charging and discharging currents, and a bypass is required to be detected in time so as to avoid fault expansion.
[ Utility model ] content
The utility model aims at providing a can be fast, accurate, reliable discovery battery open a way and can be according to the battery alarm device that opens a way of battery state output alarm signal.
In order to achieve the main purpose, the utility model provides a pair of battery open circuit alarm device includes square wave signal generator, battery pack module, discriminator and alarm output circuit, square wave signal generator receives mains voltage, and based on mains voltage produces the square wave signal that has certain duty cycle, square wave signal generator via storage battery module output square wave signal extremely the discriminator, the discriminator according to frequency, phase place, the amplitude among the square wave signal produce alarm signal, the discriminator output alarm signal extremely alarm output circuit; the frequency discriminator comprises a phase-locked loop chip, a first regulator, a second regulator and a low-pass filter, wherein a tenth pin of the phase-locked loop chip is electrically connected with the first regulator, a tenth pin of the phase-locked loop chip is electrically connected with the second regulator, and a thirteenth pin of the phase-locked loop chip is electrically connected with the low-pass filter.
The first regulator comprises a first resistor and a fifth potentiometer, wherein the second pin of the first resistor is electrically connected with the first pin of the fifth potentiometer, and the second pin and the third pin of the fifth potentiometer are connected in parallel.
In a further scheme, the second regulator comprises a third potentiometer, a first pin and a second pin of the third potentiometer are connected in parallel, and a third pin of the third potentiometer is electrically connected with an input pin of the alarm output circuit.
In a further aspect, the low-pass filter includes a fourth resistor, a fifth resistor, and a fourth capacitor, a first pin of the fourth resistor is electrically connected to a thirteenth pin of the pll chip, a second pin of the fourth resistor is electrically connected to a first pin of the fifth resistor, and a second pin of the fifth resistor is electrically connected to a first pin of the fourth capacitor.
In a further embodiment, the square wave generator is a multivibrator composed of a 555 timer, the frequency of the multivibrator is 500HZ, and the duty ratio of the multivibrator is 50%.
According to a further scheme, the square wave signal generator further comprises a fifth capacitor, a first diode, a sixth resistor, a seventh resistor and a first potentiometer, a third pin of the 555 timer is output to the storage battery pack module, a second pin of the sixth resistor is electrically connected with a first pin of the first potentiometer, a second pin of the first potentiometer is electrically connected with a first pin of the seventh resistor, a first pin of the fifth capacitor is electrically connected with a second pin of the 555 timer and a cathode of the first diode, and an anode of the first diode is connected between the third pin of the first potentiometer and the seventh pin of the 555 timer.
Therefore, the utility model provides a battery alarm device that opens a way utilizes square signal generator to produce continuous, decide the frequency, decide the high-power square wave signal source of duty cycle, establishes ties and inputs the discriminator behind the storage battery module, and the discriminator exports alarm output circuit after frequency, phase place, amplitude are distinguished, can obtain alarm signal that opens a way. Therefore, the alarm device effectively solves the problem of battery open circuit alarm in the battery non-disassembly bridging bypass device, has the characteristics of rapidness, accuracy, reliability, strong anti-interference performance and the like, reduces the working strength and the operation difficulty of field workers, and eliminates major potential safety hazards of equipment operation; the method has popularization significance for the equipment maintenance of the storage battery pack of the direct current system, and can be continuously operated on line and play an important role in improving the reliability of the direct current system as the open-circuit signals of the battery are monitored in all directions, and the open-circuit mode can be correctly judged; the device is simple, the cost is low, and because the standard signal is transmitted with low power consumption, other relay protection equipment and a microcomputer system are not influenced, and the anti-interference performance is strong; the circuit has an intelligent processing basis, and the automation degree of storage battery management is improved.
[ description of the drawings ]
Fig. 1 is a schematic diagram of an embodiment of the storage battery open circuit alarm device of the present invention.
Fig. 2 is a schematic diagram of a PNGV model relating to a battery pack module in an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a frequency discriminator in an embodiment of the open-circuit alarm device for a battery of the present invention.
Fig. 4 is a schematic circuit diagram of a square wave signal generator in an embodiment of the open circuit alarm device for a storage battery of the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
Referring to fig. 1, the utility model discloses a battery alarm device that opens a way includes square wave signal generator 1, storage battery module 4, discriminator 2 and alarm output circuit 3, square wave signal generator 1 receives mains voltage, and based on mains voltage produces the square wave signal that has certain duty cycle, square wave signal generator 1 exports square wave signal to discriminator 2 via storage battery module 4, discriminator 2 is according to frequency in the square wave signal, the phase place, amplitude produce alarm signal, discriminator 2 outputs alarm signal to alarm output circuit 3. Wherein, the frequency discriminator 2 can continuously process frequency, phase and amplitude and output a standard level alarm signal.
In this embodiment, the square wave signal generator 1, the frequency discriminator 2 and the alarm output circuit 3 are all suspended, isolated and powered, so as to be convenient for matching, avoid short circuit of the electric power direct current system and improve the anti-interference performance.
Referring to fig. 2, fig. 2 is a PNGV model of the battery module 4, which is based on Thevenin's theorem to increase the consideration of the influence of the load current on the OCV of the battery. In this model, the voltage U
ocFor indicating the ideal open circuit voltage of the battery, capacitor C
bIs a battery capacitor (representing a load current I)
LResulting OCV change), resistance R
oIs the ohmic internal resistance of the battery (passing load current is I)
L) Resistance R
pIs the polarization internal resistance of the battery (the passing polarization current is I)
p) Capacitor C
pIs a polarization capacitor (representing the load current I
LInduced polarization voltage U
pChange).
Wherein the storage battery module 4 has an equivalent C
b、C
pThe square wave signal can easily pass through with low impedance and is input to the frequency discriminator 2, if the storage battery pack module 4 has no open-circuit fault, the frequency discriminator 2 displays normal after discriminating according to the frequency, phase and amplitude of the input signal, otherwise, the alarm output circuit 3 is driven to respond, and the storage battery pack loop charges and discharges load current I
LBeing dc, the discriminator 2 does not respond.
Referring to fig. 3, the frequency discriminator 2 includes a pll chip U1, a first regulator, a second regulator, and a low pass filter, wherein the eleventh pin of the pll chip U1 is electrically connected to the first regulator, the tenth pin of the pll chip U1 is electrically connected to the second regulator, and the thirteenth pin of the pll chip U1 is electrically connected to the low pass filter.
The first regulator comprises a first resistor R1 and a fifth potentiometer R5, a first pin of the first resistor R1 is electrically connected with an eleventh pin of a phase-locked loop chip U1, a second pin of the first resistor R1 is electrically connected with a first pin of the fifth potentiometer R5, and a second pin and a third pin of the fifth potentiometer R5 are connected in parallel.
The second regulator comprises a third potentiometer R3, a first pin and a second pin of the third potentiometer R3 are connected in parallel and then electrically connected with a tenth pin of the phase-locked loop chip U1, and a third pin of the third potentiometer R3 is electrically connected with an input pin of the alarm output circuit 3.
The low-pass filter comprises a fourth resistor R4, a fifth resistor R5 and a fourth capacitor C4, wherein a first pin of the fourth resistor R4 is electrically connected with a thirteenth pin of the phase-locked loop chip U1, a second pin of the fourth resistor R4 is electrically connected with a first pin of the fifth resistor R5, and a second pin of the fifth resistor R5 is electrically connected with a first pin of the fourth capacitor C4.
Preferably, the pll chip U1 is the pll chip CD 4046. With the frequency meter discriminator 2 constructed of the conventional CD4046, the discriminator 2 indicates the level and phase of the frequency, amplitude, etc. to be measured by the third potentiometer R3. The first regulator is formed by connecting a first resistor R1 with the resistance value of 47k omega in series with a fifth potentiometer R5 with the resistance value of 51k omega in series, the fourth resistor R4, the fifth resistor R5 and a fourth capacitor C4 form a low-pass filter, the third potentiometer R3 is connected with the input of the alarm output circuit 3 in series to serve as the load of the source follower, and the third potentiometer R3 is further used for regulating the full amplitude range of frequency discrimination. And the output is connected with a large capacitor C3 of 100uF in parallel for eliminating the fluctuation phenomenon of the output at low frequency, and the frequency discrimination measurement range of the frequency meter is 20 Hz-1 kHz. When the calibration is performed by the standard signal generator and the standard frequency meter, the fifth potentiometer R5 of 51k Ω is required to be adjusted, and the frequency discriminator 2 has good linearity.
Referring to fig. 4, the square wave signal generator 1 is a multivibrator consisting of a 555 timer U2, with a frequency of 500HZ and a duty cycle of 50%. The standard square wave signal of the square wave signal generator 1 is characterized by square waves, frequency of 500HZ and 50% duty ratio, so that the frequency discriminator 2 can accurately detect the square waves and has certain anti-interference resolution capability, and can be distinguished from possible electromagnetic compatibility interference of other high-frequency power supplies and relay protection equipment on an electric loop, and the accuracy of battery open-circuit alarm can be improved.
The square wave signal generator 1 further includes a fifth capacitor C5, a first diode D1, a sixth resistor R6, a seventh resistor R7, and a first potentiometer RP1, wherein a third pin of a 555 timer U1 is output to the battery module 4, a second pin of the sixth resistor R6 is electrically connected to a first pin of the first potentiometer RP1, a second pin of the first potentiometer RP1 is electrically connected to a first pin of the seventh resistor R7, a first pin of the fifth capacitor C5 is electrically connected to a second pin of the 555 timer U2 and a negative electrode of the first diode D1, and an anode of the first diode D1 is connected between a third pin of the first potentiometer RP1 and a seventh pin of the 555 timer U2.
Specifically, the 555 timer U2 is a multi-purpose monolithic medium-scale integrated circuit, which is flexible and convenient to use, and can be connected with a small number of resistance-capacitance elements to form a monostable, multivibrator and schmitt trigger, thus being widely applied to the fields of waveform generation and transformation, measurement and control, household appliances and the like. The working power supply voltage of the 555 timer U2 is very wide and can bear large load current, the power supply voltage range of the bipolar timer is 5-16V, the maximum load current can reach 200mA, and the bipolar timer can completely directly drive the capacitive reactance of the storage battery pack. The input end of the square wave signal generator 1 only needs to add a voltage V
DDThe oscillator starts oscillation. When the power is just switched on, the voltage on the fifth capacitor C5 cannot change suddenly, that is, the initial level of the potential of the second pin of the 555 timer U2 is low, the 555 timer U2 is set, and the third pin of the 555 timer U2 is high. Fifth capacitance C5 through R
AD1 charges the capacitor for CRtA7.0, when the threshold level DDV3/2 is reached, the 555 timer U2 resets, the third pin turns to low level, and the fifth capacitor C5 passes through D1 and R5
BAnd a discharge tube in the 555 timer U2 discharges, the discharge time is CRtB7.0 discharge, and the oscillation period is T discharge charge-T charge + T discharge.
Therefore, the utility model provides a battery alarm device that opens a way utilizes square wave signal generator 1 to produce continuous, decide the frequency, decide the high-power square wave signal source of duty cycle, establishes ties and inputs discriminator 2 behind storage battery module 4, and discriminator 2 exports alarm output circuit 3 after frequency, phase place, amplitude are distinguished, can obtain the alarm signal that opens a way. Therefore, the alarm device effectively solves the problem of battery open circuit alarm in the battery non-disassembly bridging bypass device, has the characteristics of rapidness, accuracy, reliability, strong anti-interference performance and the like, reduces the working strength and the operation difficulty of field workers, and eliminates major potential safety hazards of equipment operation; the method has popularization significance for the equipment maintenance of the storage battery pack of the direct current system, and can be continuously operated on line and play an important role in improving the reliability of the direct current system as the open-circuit signals of the battery are monitored in all directions, and the open-circuit mode can be correctly judged; the device is simple, the cost is low, and because the standard signal is transmitted with low power consumption, other relay protection equipment and a microcomputer system are not influenced, and the anti-interference performance is strong; the circuit has an intelligent processing basis, and the automation degree of storage battery management is improved.
As optimization, the frequency discriminator 2 can respectively carry out sampling analysis according to different specific numerical values of frequency, phase, amplitude and the like of input signals, not only can open circuit alarm be carried out, but also the types, severity and the existence of a plurality of open circuits can be accurately distinguished, and the intelligent processing basis is provided.
As optimization, the square wave signal generator 1 can work by adopting pulses, so that the power consumption of the device is reduced, the self-interference is reduced, and the device can run online for a long time.
As optimization, the whole device can adopt an integrated metal full-shielding design, so that the electromagnetic compatibility is improved, and the device can be flexibly applied to all parts of an electric power direct-current system as a special storage battery open-circuit alarm device.
It should be noted that the above is only the preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and all the insubstantial modifications made by using the design concept of the present invention also fall within the protection scope of the present invention.
Claims (6)
1. An open-circuit alarm device for a storage battery, comprising:
the square wave signal generator receives power supply voltage and generates a square wave signal with a certain duty ratio based on the power supply voltage, the square wave signal generator outputs the square wave signal to the frequency discriminator through the storage battery pack module, the frequency discriminator generates an alarm signal according to the frequency, the phase and the amplitude of the square wave signal, and the frequency discriminator outputs the alarm signal to the alarm output circuit;
the frequency discriminator comprises a phase-locked loop chip, a first regulator, a second regulator and a low-pass filter, wherein a tenth pin of the phase-locked loop chip is electrically connected with the first regulator, a tenth pin of the phase-locked loop chip is electrically connected with the second regulator, and a thirteenth pin of the phase-locked loop chip is electrically connected with the low-pass filter.
2. The open-circuit alarm device for a storage battery according to claim 1, wherein:
the first regulator comprises a first resistor and a fifth potentiometer, a second pin of the first resistor is electrically connected with a first pin of the fifth potentiometer, and a second pin and a third pin of the fifth potentiometer are connected in parallel.
3. The open-circuit alarm device for a storage battery according to claim 2, wherein:
the second regulator comprises a third potentiometer, a first pin and a second pin of the third potentiometer are connected in parallel, and a third pin of the third potentiometer is electrically connected with an input pin of the alarm output circuit.
4. The open-circuit alarm device for a storage battery according to claim 3, wherein:
the low-pass filter comprises a fourth resistor, a fifth resistor and a fourth capacitor, a first pin of the fourth resistor is electrically connected with a thirteenth pin of the phase-locked loop chip, a second pin of the fourth resistor is electrically connected with a first pin of the fifth resistor, and a second pin of the fifth resistor is electrically connected with a first pin of the fourth capacitor.
5. The open-circuit battery alarm device according to claim 1 or 2, wherein:
the square wave signal generator is a multivibrator formed by a 555 timer, the frequency of the multivibrator is 500HZ, and the duty ratio of the multivibrator is 50%.
6. The open-circuit alarm device for a storage battery according to claim 5, wherein:
the square wave signal generator further comprises a fifth capacitor, a first diode, a sixth resistor, a seventh resistor and a first potentiometer, the third pin of the 555 timer is output to the storage battery pack module, the second pin of the sixth resistor is electrically connected with the first pin of the first potentiometer, the second pin of the first potentiometer is electrically connected with the first pin of the seventh resistor, the first pin of the fifth capacitor is electrically connected with the second pin of the 555 timer and the cathode of the first diode, and the anode of the first diode is connected between the third pin of the first potentiometer and the seventh pin of the 555 timer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920733180.2U CN210051867U (en) | 2019-05-21 | 2019-05-21 | Storage battery open circuit alarm device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920733180.2U CN210051867U (en) | 2019-05-21 | 2019-05-21 | Storage battery open circuit alarm device |
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| CN210051867U true CN210051867U (en) | 2020-02-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433157A (en) * | 2020-10-29 | 2021-03-02 | 云南电网有限责任公司丽江供电局 | Online monitoring and distinguishing system for internal short circuit and leakage fault of power lithium battery |
| CN112578299A (en) * | 2020-10-27 | 2021-03-30 | 深圳供电局有限公司 | Method and device for determining internal metal structure fracture of storage battery |
-
2019
- 2019-05-21 CN CN201920733180.2U patent/CN210051867U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578299A (en) * | 2020-10-27 | 2021-03-30 | 深圳供电局有限公司 | Method and device for determining internal metal structure fracture of storage battery |
| CN112433157A (en) * | 2020-10-29 | 2021-03-02 | 云南电网有限责任公司丽江供电局 | Online monitoring and distinguishing system for internal short circuit and leakage fault of power lithium battery |
| CN112433157B (en) * | 2020-10-29 | 2024-03-01 | 云南电网有限责任公司丽江供电局 | On-line monitoring and distinguishing system for internal short circuit and leakage fault of power lithium battery |
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