CN116632970A - Waterproof energy storage power supply and waterproof detection method - Google Patents
Waterproof energy storage power supply and waterproof detection method Download PDFInfo
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- CN116632970A CN116632970A CN202310566846.0A CN202310566846A CN116632970A CN 116632970 A CN116632970 A CN 116632970A CN 202310566846 A CN202310566846 A CN 202310566846A CN 116632970 A CN116632970 A CN 116632970A
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- power supply
- detection plate
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- 238000001514 detection method Methods 0.000 title claims abstract description 214
- 238000004146 energy storage Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 226
- 230000008859 change Effects 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 71
- 229910052802 copper Inorganic materials 0.000 claims description 62
- 239000010949 copper Substances 0.000 claims description 62
- 239000003990 capacitor Substances 0.000 claims description 47
- 230000001052 transient effect Effects 0.000 claims description 21
- 238000001914 filtration Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The embodiment of the invention provides a waterproof energy storage power supply and a waterproof detection method, comprising a power supply body, a micro-processing unit, a detection circuit module, a water inlet detection plate and an output port, wherein the power supply body, the micro-processing unit and the detection circuit module are positioned in a waterproof shell; the water inlet detection plate is vertically arranged on the side wall of the waterproof shell; the signal wire of the water inlet detection plate is led into the waterproof shell and is connected with the detection circuit module; the micro-processing unit is used for collecting the voltage signal and judging the water inlet state of the water inlet detection plate according to the voltage signal. According to the scheme, the resistance change signal of the water inlet detection plate is converted into the voltage signal by the detection circuit module, so that the micro-processing unit judges the water inlet state according to the voltage signal, the output port is controlled to supply power to a load and control the electric energy output of the internal battery pack according to the water inlet state, the electric energy output can be timely controlled after the energy storage power supply is supplied with water, the output port is prevented from continuously supplying power under the water inlet condition, the safety of the energy storage power supply is improved, and the service life is prolonged.
Description
Technical Field
The invention belongs to the technical field of energy storage application, and particularly relates to a waterproof energy storage power supply and a waterproof detection method.
Background
The portable energy storage power supply in the prior art is mainly structurally designed to install the core component on the inner side of the upper part of the waterproof frame and is used for avoiding the influence of humidity and rainfall on the energy storage power supply. However, by adopting the scheme, under the condition of burst of a large amount of water, the charging interface is provided with water, and the external interface is possibly damaged if the charging interface is continuously used, so that the charging interface has potential safety hazards.
Disclosure of Invention
The embodiment of the invention provides a waterproof energy storage power supply and a waterproof detection method, which are used for solving the problem of damage to a charging port in the prior art.
The embodiment of the invention provides a waterproof energy storage power supply, which comprises a power supply body, a microprocessor unit, a detection circuit module, a water inlet detection plate and an output port, wherein the power supply body, the microprocessor unit and the detection circuit module are positioned in a waterproof shell;
the water inlet detection plate is vertically arranged on the side wall of the waterproof shell and consists of a PCB copper bar array, and adjacent PCB copper bars are connected by a PCB base material; the signal wire of the water inlet detection plate is led into the waterproof shell and is connected with the detection circuit module;
the detection circuit module is used for collecting the resistance of the water inlet detection plate and converting a resistance change signal into a voltage signal;
the micro-processing unit is used for collecting the voltage signal and judging the water inlet state of the water inlet detection plate according to the voltage signal so as to control the power supply of the output port to the load or control the electric energy output of the internal battery pack of the energy storage power supply.
Optionally, the detection circuit module includes a first resistor, a second resistor and a voltage source, wherein a first end of the first resistor is connected with the voltage source, and a second end of the first resistor is connected with a first end of the second resistor;
the second end of the first resistor is also connected with the micro-processing unit;
the first end of the second resistor is also connected with the first end of the water inlet detection plate, and the second end of the second resistor is connected with the second end of the water inlet detection plate.
Optionally, the detection circuit module further comprises a first filter circuit composed of a first capacitor and a third resistor, and the first filter circuit is used for filtering high-frequency noise generated by the first resistor; the first end of the third resistor is connected with the first end of the water inlet detection plate, and the second end of the third resistor is connected with the first end of the first capacitor; the second end of the first capacitor is connected with the second end of the water inlet detection plate;
the second end of the third resistor is connected with the second end of the first resistor, and the second end of the first capacitor is also connected with the second end of the second resistor.
Optionally, the detection circuit module further includes a second filter circuit composed of a second capacitor and a fourth resistor, and the second filter circuit is used for filtering noise of the detection circuit module;
the first end of the fourth resistor is connected with the first end of the second resistor, and the second end of the fourth resistor is connected with the first end of the second capacitor; the second end of the second capacitor is connected with the second end of the second resistor; the second end of the fourth resistor is also connected with the micro-processing unit.
Optionally, the detection circuit module further includes a third capacitor; the third capacitor, the first resistor and the second resistor form a third filter circuit for filtering noise introduced by the voltage source;
the first end of the third capacitor is connected with the first end of the first resistor, the second end of the third capacitor is connected with the second end of the second resistor, and the second end of the third capacitor is also connected with the second end of the water inlet detection plate.
Optionally, the detection circuit module further comprises a transient diode for preventing static electricity generated by the PCB copper bar array from damaging a circuit;
the first end of the transient diode is connected with the first end of the water inlet detection plate, the second end of the transient diode is connected with the second end of the water inlet detection plate, the second end of the transient diode is also connected with the second end of the second resistor, and the second end of the transient diode is also grounded.
Optionally, the PCB substrate is plated with metal gold for corrosion protection.
Optionally, the PCB copper bar array includes an anode copper bar array connected by a top connecting bar and a cathode copper bar array connected by a bottom connecting bar, and the anode copper bar array and the cathode copper bar array are mutually embedded;
the distance between the first end of the positive electrode copper bar and the bottom connecting bar is larger than a preset first distance, and the first end is the end, away from the positive electrode connecting bar, of the positive electrode copper bar.
The embodiment of the invention also provides a waterproof detection method, which comprises the following steps:
collecting a voltage signal output by the detection circuit module; the voltage signal is obtained by converting the resistance change signal of the water inlet detection plate by the detection circuit module;
determining a water inlet state of the water inlet detection plate according to the magnitude relation between the voltage value included in the voltage signal and the first voltage threshold value and the second voltage threshold value;
when the water inlet state is determined to be not water inlet, controlling the output port to output electric energy;
when the water inlet state is determined to be water inlet, controlling the electric energy output of an internal battery pack of the energy storage power supply to be disconnected;
and when the water inlet state is determined to be moist, controlling the output port to stop outputting electric energy.
Optionally, determining the water inlet state of the water inlet detection plate according to the magnitude relation between the voltage value included in the voltage signal and the first voltage threshold and the second voltage threshold includes:
when the voltage signal comprises a voltage value larger than the first voltage threshold value, the micro-processing unit determines that the water inlet state is not water inlet;
when the voltage signal comprises a voltage value smaller than a second voltage threshold value, the micro-processing unit determines that the water inlet state is water inlet;
the microprocessor unit determines that the water inlet state is humid when the voltage signal includes a voltage value greater than or equal to the second voltage threshold and less than or equal to the first voltage threshold.
The embodiment of the invention has at least the following beneficial effects:
the waterproof energy storage power supply provided by the embodiment of the invention comprises a power supply body, a micro-processing unit and a detection circuit module, wherein the power supply body, the micro-processing unit and the detection circuit module are arranged in a waterproof shell; the water inlet detection plate is vertically arranged on the side wall of the waterproof shell and consists of a PCB copper bar array, and adjacent PCB copper bars are connected by a PCB base material; the signal wire of the water inlet detection plate is led into the waterproof shell and is connected with the detection circuit module; the detection circuit module is used for collecting the resistance of the water inlet detection plate and converting a resistance change signal into a voltage signal; the micro-processing unit is used for collecting the voltage signals and judging the water inlet state of the water inlet detection plate according to the voltage signals. According to the scheme, the resistance change signal of the water inlet detection plate is converted into the voltage signal by the detection circuit module, so that the micro-processing unit judges the water inlet state of the water inlet detection plate according to the voltage signal, and accordingly the output port is controlled to supply power to a load and control the electric energy output of the internal battery pack according to the water inlet state, thus the electric energy output can be controlled in time after the water inlet of the energy storage power supply, the output port is prevented from continuing to supply power under the water inlet condition, the safety of the energy storage power supply is improved, and the service life is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural connection diagram of a waterproof energy storage power supply according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating installation of a water inlet detection plate according to an embodiment of the present invention;
fig. 3 is a schematic circuit connection diagram of a detection circuit module according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a water inlet detection plate according to an embodiment of the present invention;
fig. 5 is a flowchart of a waterproof detection method according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a water inlet state of a water inlet detection plate according to an embodiment of the present invention.
Reference numerals:
1-a waterproof shell; 2-transition interfaces; 3-signal lines; 4-a water inlet detection plate; 5-mounting holes; 6-an anode copper bar; 7-negative electrode copper bars; 8-a substrate; 9-water.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic structural connection diagram of a waterproof energy storage power supply according to an embodiment of the present invention.
As shown in fig. 1, the waterproof device comprises a power supply body, a micro-processing unit, a detection circuit module, a water inlet detection plate 4 and an output port, wherein the power supply body, the micro-processing unit and the detection circuit module are arranged inside a waterproof shell 1, and the water inlet detection plate 4 is arranged on the side wall of the waterproof shell 1, and the output port is used for accessing a load.
The water inlet detection plate 4 is vertically arranged on the side wall of the waterproof shell 1 and consists of a PCB copper bar array, and adjacent PCB copper bars are connected by a PCB base material 8; the signal wire 3 of the water inlet detection plate 4 is led into the waterproof shell and is connected with the detection circuit module.
Specifically, the power supply body is used for externally supplying power and supplying power to the whole detection circuit module and the micro-processing unit. The waterproof shell 1 is sleeved on the power supply body, and an opening is reserved on the side face of the waterproof shell 1 for connecting a load into an output port. The transition interface 2 of the signal wire 3 inside the waterproof shell 1 adopts a waterproof process, so that water outside the waterproof shell can be prevented from entering the waterproof shell along the signal wire 3.
Fig. 2 is an installation schematic diagram of a water inlet detection plate according to an embodiment of the present invention.
As shown in fig. 2, the water inlet detection plate 4 is used for detecting the water inlet state, and the water inlet detection plate 4 is vertically installed outside the side wall of the waterproof shell 1, so that water attached to the water inlet detection plate 4 naturally flows down, and no water is accumulated on the water inlet detection plate 4.
The PCB substrate 8 is mainly composed of glass fiber cloth, epoxy resin, polyimide, etc., and is a non-conductive material. The water inlet detection board 4 consists of a PCB copper bar array, the copper bar array is positioned on a PCB base material 8 and connected through the PCB base material 8, and the signal wire 3 of the water inlet detection board 4 is arranged inside the waterproof shell 1 and connected to the detection circuit module. When the water 9 is not covered in the water inlet detection plate 4, only the PCB base material 8 is connected between the adjacent copper strips, the resistance value is large, when the water 9 is covered on the adjacent copper strips, the resistance value of the adjacent copper strips is reduced along with the increase of the water coverage surface, and therefore whether water inlet exists can be judged by measuring the resistance value between the adjacent copper strips. After the water inlet detection plate 4 is filled with water, the resistance of the water inlet detection plate 4 can be changed, and the resistance change is transmitted to the detection circuit module through the signal line 3.
The detection circuit module is used for collecting the resistance of the water inlet detection plate and converting a resistance change signal into a voltage signal;
the micro-processing unit is used for collecting the voltage signal and judging the water inlet state of the water inlet detection plate according to the voltage signal so as to control the power supply of the output port to the load or control the electric energy output of the internal battery pack of the energy storage power supply.
Specifically, as shown in fig. 1, the detection circuit module receives the resistance change of the water inlet detection plate 4 through the signal line 3, and converts the resistance change signal into a voltage signal, specifically, converts the resistance of the water inlet detection plate 4 into a corresponding voltage value. The magnitude of the voltage value varies with the resistance change of the water inflow detection plate 4.
The micro-processing unit is arranged inside the waterproof shell 1, is connected with the detection circuit module, collects voltage signals on the detection circuit module, and judges the water inlet state of the water inlet detection plate 4 according to specific voltage values included in the voltage signals. The water inlet state detected by the water inlet detection plate 4 is mainly divided into three states of no water inlet, moisture and water inlet, and under different states, the water inlet detection plate 4 corresponds to different resistors, and the different resistors are converted into corresponding voltage values through the detection circuit module.
After determining the water inlet state of the water inlet detection plate 4, the micro-processing unit controls whether the output port of the energy storage power supply can output electric energy to a load or controls whether the battery pack in the power supply body continuously outputs electric energy according to different water inlet states. The battery pack is used for providing electric energy for the operation of the waterproof energy storage power supply.
In summary, the waterproof energy storage power supply provided by the embodiment of the invention comprises a power supply body, a micro-processing unit, a detection circuit module, a water inlet detection plate and an output port, wherein the power supply body, the micro-processing unit and the detection circuit module are arranged in a waterproof shell; the water inlet detection plate is vertically arranged on the side wall of the waterproof shell and consists of a PCB copper bar array, and adjacent PCB copper bars are connected by a PCB base material; the signal wire of the water inlet detection plate is led into the waterproof shell and is connected with the detection circuit module; the detection circuit module is used for collecting the resistance of the water inlet detection plate and converting a resistance change signal into a voltage signal; the micro-processing unit is used for collecting the voltage signals and judging the water inlet state of the water inlet detection plate according to the voltage signals. According to the scheme, the resistance change signal of the water inlet detection plate is converted into the voltage signal by the detection circuit module, so that the micro-processing unit judges the water inlet state of the water inlet detection plate according to the voltage signal, and accordingly the output port is controlled to supply power to a load and control the electric energy output of the internal battery pack according to the water inlet state, thus the electric energy output can be controlled in time after the water inlet of the energy storage power supply, the output port is prevented from continuing to supply power under the water inlet condition, the safety of the energy storage power supply is improved, and the service life is prolonged.
In one possible implementation, the detection circuit module includes a first resistor, a second resistor, and a voltage source, a first end of the first resistor being connected to the voltage source, a second end of the first resistor being connected to a first end of the second resistor;
the second end of the first resistor is also connected with the micro-processing unit;
the first end of the second resistor is also connected with the first end of the water inlet detection plate, and the second end of the second resistor is connected with the second end of the water inlet detection plate.
Specifically, fig. 3 is a schematic circuit connection diagram of a detection circuit module according to an embodiment of the present invention.
As shown in fig. 3, a second resistor R126 in the detection circuit module is connected in parallel with the water inlet detection plate 4, and an equivalent resistor after the second resistor R126 is connected in parallel with the water inlet detection plate 4 is connected in series with the first resistor R125. The second end of the first resistor R125 is connected to the micro-processing unit according to the principle of the resistor voltage division method, that is, the signal received by the micro-processing unit is the voltage across the equivalent resistor comprising the water inlet detection plate 4. In the embodiment of the present invention, the resistance of the first resistor R125 is 3mΩ, and the resistance of the second resistor R126 is 1mΩ. The power of the voltage source VCC in the detection circuit is also provided by an energy storage power supply, and the voltage of the voltage source VCC is 5V.
In one possible implementation manner, the detection circuit module further comprises a first filter circuit composed of a first capacitor and a third resistor, and the first filter circuit is used for filtering high-frequency noise generated by the first resistor; the first end of the third resistor is connected with the first end of the water inlet detection plate, and the second end of the third resistor is connected with the first end of the first capacitor; the second end of the first capacitor is connected with the second end of the water inlet detection plate;
the second end of the third resistor is connected with the second end of the first resistor, and the second end of the first capacitor is also connected with the second end of the second resistor.
Specifically, the filter circuit functions to allow only signal components within the cut-off frequency range to pass normally, while preventing components greater than the cut-off frequency from passing.
As shown in fig. 3, the first filter circuit is composed of a third resistor R122 and a first capacitor C96, the first capacitor C96 is connected in parallel with the water inlet detection plate, and the third resistor R122 is connected in series with the first capacitor C96. In the embodiment of the present invention, the capacitance of the first capacitor C96 is 10nF, and the resistance of the third resistor R122 is 10Ω. The cut-off frequency of the filter circuit is f=1/(2pi RC), specific values of C96 and R122 are substituted into a cut-off frequency formula, and the cut-off frequency of the first filter circuit is calculated to be 1.59Mhz.
The copper bar array of the water inlet detection plate 4 corresponds to a small composite antenna, which converts a small amount of external electromagnetic waves into harmful electron flow, and when the electron flow flows through the circuit element, serious distortion, noise increase and power consumption increase are caused, so that the normal operation of the circuit is affected. The frequency of the noise generated by the antenna effect is generally greater than 30Mhz, so the first filter circuit mainly filters out the high-frequency noise induced by the antenna effect from the copper bar array of the water inlet detection plate 4.
In a possible implementation manner, the detection circuit module further comprises a second filter circuit composed of a second capacitor and a fourth resistor, and the second filter circuit is used for filtering noise of the detection circuit module;
the first end of the fourth resistor is connected with the first end of the second resistor, and the second end of the fourth resistor is connected with the first end of the second capacitor; the second end of the second capacitor is connected with the second end of the second resistor; the second end of the fourth resistor is also connected with the micro-processing unit.
Specifically, as shown in fig. 3, the second filter circuit in the detection circuit module is composed of a second capacitor C97 and a fourth resistor R124. The second capacitor C97 is connected in parallel with the water inlet detection plate 4 and in series with the fourth resistor R124.
In the embodiment of the invention, the capacitance of the second capacitor C97 is 10nF, the resistance of the fourth resistor R124 is 100kΩ, and the capacitance value of the second capacitor C97 and the resistance value of the fourth resistor R124 are substituted into the cutoff frequency calculation formula of the filter circuit, so as to obtain the cutoff frequency of the second filter circuit is 15.9Khz. The noise frequency of the detection circuit module is generally greater than 15.9Khz, and the second filter circuit is mainly used for filtering the noise of the detection circuit module.
In one possible implementation, the detection circuit module further includes a third capacitor; the third capacitor, the first resistor and the second resistor form a third filter circuit for filtering noise introduced by the voltage source;
the first end of the third capacitor is connected with the first end of the first resistor, the second end of the third capacitor is connected with the second end of the second resistor, and the second end of the third capacitor is also connected with the second end of the water inlet detection plate.
Specifically, as shown in fig. 3, the first terminal of the third capacitor C98 is connected to the voltage source VCC in addition to the first terminal of the first resistor. The first resistor R125 and the second resistor R126 are connected in series and then connected in parallel with the third capacitor C98, and together form a third filter circuit for filtering noise introduced by the voltage source VCC.
The output of the voltage source itself in the circuit is not constant and there will be some ripple. The voltage stabilizing chip determines that once the voltage stabilizing power chip is selected, the noise can only be accepted and cannot be controlled, so that the noise introduced by the voltage source needs to be filtered by designing a filtering power supply. The capacitance value for filtering the noise of the power supply is not fixed, and the specific value of the third capacitor C98 is not limited in the embodiment of the present invention.
In one possible embodiment, the detection circuit module further includes a transient diode for preventing static electricity generated by the PCB copper bar array from damaging a circuit;
the first end of the transient diode is connected with the first end of the water inlet detection plate, the second end of the transient diode is connected with the second end of the water inlet detection plate, the second end of the transient diode is also connected with the second end of the second resistor, and the second end of the transient diode is also grounded.
Specifically, as shown in fig. 3, a transient diode TVS13 is connected in parallel with the water intake detection plate 4. The copper bar array in the water inlet detection plate 4 may generate static electricity, and when a transient voltage occurs in the circuit, the transient diode TVS13 is automatically turned on, so that the transient voltage is restrained within a safe range, and the circuit element is protected from being damaged. In order to prevent static electricity from damaging elements in the detection circuit module, the transient diode TVS13 is provided to avoid the influence of static electricity. In addition, the second terminal of the transient diode TVS13 is also grounded, and some unnecessary high frequency noise can be shorted to ground, thereby reducing interference to the detection circuit module.
In one possible embodiment, the PCB substrate is plated with metallic gold for corrosion protection.
Specifically, the gold plating on the PCB substrate 8 is mainly for oxidation prevention and corrosion prevention, and the service life of the water inlet detection plate 4 can be prolonged.
In one possible implementation, the PCB copper bar array includes an anode copper bar array connected by a top connecting bar and a cathode copper bar array connected by a bottom connecting bar, the anode copper bar array and the cathode copper bar array being arranged in a mutually embedded manner;
the distance between the first end of the positive electrode copper bar and the bottom connecting bar is larger than a preset first distance, and the first end is the end, away from the positive electrode connecting bar, of the positive electrode copper bar.
Specifically, fig. 4 is a schematic structural diagram of a water inlet detection plate according to an embodiment of the present invention.
As shown in fig. 4, the water inflow detection plate is provided with a plurality of mounting holes 5, and the water inflow detection plate 4 is fixed on the waterproof housing 1 through the mounting holes 5. The whole row of copper bars in the water inlet detection plate 4 can be divided into two parts, namely an array of positive copper bars 6 and an array of negative copper bars 7. The array of positive copper bars 6 are connected by a connecting bar at the top of the water inlet detection plate 4. The positive copper bar 6 is divided into two ends, the first end of the positive copper bar 6 is close to the bottom and is a free end, and the second end is connected in the top connecting bar. The array of negative copper bars 7 is then connected by the connecting bar that is located the bottom of intake pick-up plate 4, and negative copper bars 7 also include both ends, and the first end of negative copper bars 7 is the free end of keeping away from the bottom connecting bar, and the second end is then connected in the bottom connecting bar.
The positive electrode copper bar 6 array and the negative electrode copper bar 7 array are mutually embedded and arranged, and the length of a reserved distance between the first end of the positive electrode copper bar 6 and the bottom connecting bar is larger than a preset first distance. The wet state and the water inlet state are distinguished through the reserved distance, so that erroneous judgment is prevented. If the humidity is relatively high and the preset first distance is not reserved at the bottom, water drops on the water inlet detection plate 4 may flow down and accumulate on the bottom connecting strip, the positive copper strip 6 and the negative copper strip 7 may be connected together, and the voltage corresponding to the generated resistance change is the voltage after water inlet, so that erroneous judgment is caused. Therefore, a certain distance is required to be reserved below the positive electrode copper bar 6, water drops generated in a wet state flow down along the water inlet detection plate 4 and accumulate between the negative electrode copper bars 7 without contacting the positive electrode copper bar 6, and resistance change is avoided, so that misjudgment is avoided.
Fig. 5 is a flowchart of a waterproof detection method according to an embodiment of the present invention.
As shown in fig. 5, the waterproof detection method of the waterproof energy storage power supply includes the following steps:
step 101, collecting a voltage signal output by the detection circuit module; the voltage signal is obtained by converting the resistance change signal of the water inlet detection plate by the detection circuit module.
Specifically, the water inlet detection board 4 is connected with the circuit detection module, the resistance change signal of the water inlet detection board 4 is transmitted to the detection circuit module, and the micro-processing unit collects and detects the resistance change of the water inlet detection board 4 and converts the resistance change into a corresponding voltage signal by the detection circuit module. Different resistance signals correspond to different voltage signals, and the voltage signals are voltage values.
Step 102, determining the water inlet state of the water inlet detection plate according to the magnitude relation between the voltage value included in the voltage signal and the first voltage threshold value and the second voltage threshold value.
Specifically, the first voltage threshold is a minimum voltage value obtained by conversion from a minimum resistance value when the water inflow detection plate 4 is not water inflow, when the water inflow detection plate 4 is not water inflow. The second voltage threshold is a maximum voltage value obtained by converting the maximum resistance of the water inlet detection plate 4 after water inlet of the water inlet detection plate 4.
After the micro-processing unit acquires the output voltage signal of the detection circuit module, the water inlet state of the water inlet detection board 4 is determined according to the specific relationship between the voltage value and the first voltage threshold value and the second voltage threshold value.
Step 103, when the water inlet state is determined to be not water inlet, controlling the output port to output electric energy;
when the water inlet state is determined to be water inlet, controlling the electric energy output of an internal battery pack of the energy storage power supply to be disconnected;
and when the water inlet state is determined to be moist, controlling the output port to stop outputting electric energy.
Specifically, the micro-processing unit collects voltage signals, and after determining the water inlet state of the water inlet detection plate 4 according to the magnitude relation between the voltage and the first and second voltage thresholds, the following control is performed on the energy storage power supply according to the water inlet state:
when the micro-processing unit judges that the water inlet state is not water inlet, the energy storage power supply can work normally in the state, and can supply power to the outside through the output port.
When the micro-processing unit judges that the water inlet state is water inlet, the micro-processing unit cuts off the electric energy output of the battery pack in the energy storage power supply, that is to say, other working modules are completely powered off except for the closing of the output port of the energy storage power supply, for example, the micro-processing unit, the display module and the detection circuit module of the energy storage power supply, and the like, which are used for providing electric energy by the battery pack in the energy storage power supply, are used for supplying electric energy. Because under the state of intaking, water is very likely to get into the energy storage power supply from the output port inside, therefore when the outside intake pick-up plate 4 of waterproof shell 1 intakes, the output circuit of the inside group battery of energy storage power supply of the timely disconnection of microprocessor has avoided the damage of energy storage power supply internal circuit structure, has also guaranteed the electrical safety simultaneously.
When the micro-processing unit judges that the water inlet state is moist, the energy storage power supply only needs to be turned off to output electric energy from the output port powered by the external power supply in the state, so that the damage to the external interface is prevented.
In one possible implementation manner, determining the water inlet state of the water inlet detection plate according to the magnitude relation between the voltage value included in the voltage signal and the first voltage threshold value and the second voltage threshold value includes:
when the voltage signal comprises a voltage value larger than the first voltage threshold value, the micro-processing unit determines that the water inlet state is not water inlet;
when the voltage signal comprises a voltage value smaller than a second voltage threshold value, the micro-processing unit determines that the water inlet state is water inlet;
the microprocessor unit determines that the water inlet state is humid when the voltage signal includes a voltage value greater than or equal to the second voltage threshold and less than or equal to the first voltage threshold.
Specifically, the resistance of the water inlet detection board is R, and according to the voltage division principle, the detection module outputs voltage v=vcc ((r+r122)// r126)/(r125+ ((r+r122)// r126))), and since the R122 value is extremely small relative to other resistance values, the detection module can be simplified as: the detection module output voltage v=vcc (R// R126)/(r125+ (R// R126)).
As can be seen from the above formula, the resistance r=r125×r126/(r125 (VCC/V-1) -R126) of the water intake detection plate 4.
Fig. 6 is a schematic cross-sectional view of a water inlet state of a water inlet detection plate according to an embodiment of the present invention.
As shown in fig. 6, when water 9 is covered on the water inlet detection plate, the resistance between the copper bar electrodes is that of parallel connection of water and the PCB substrate 8, and as the resistivity of water is much smaller than that of the PCB substrate 8, the resistance value after parallel connection becomes smaller, and the specific value is inversely proportional to the thickness of the water 9 on the section of the water inlet detection plate 4 of the water 9 layer, and the thicker the water layer, the smaller the resistance value between the electrodes. When the water inlet detection plate 4 is dried, the resistance between the positive electrode copper bar 6 and the negative electrode copper bar 7 is air, the resistance r of the water inlet detection plate is the resistance after the air is connected with the PCB base material 8 in parallel, and the resistance value between the positive electrode copper bar and the negative electrode copper bar after the air is connected with the PCB base material 8 in parallel is extremely large and is generally larger than 10MΩ because the air and the PCB base material 8 are not conductors. Therefore, when the water inlet detection plate 4 does not inlet water, r is greater than 10mΩ and is brought into the output voltage formula of the detection circuit module, the calculated output voltage of the detection circuit module is greater than 1.16V, and therefore the first voltage threshold is preset to be 1.16V.
The resistance of the water inlet detection plate 4 after water inlet is generally smaller than 1mΩ, that is, the maximum resistance of the water inlet detection plate 4 after water inlet is smaller than 1mΩ. And (3) taking r smaller than 1MΩ into a calculation formula of the output voltage V of the detection circuit module, wherein the voltage value of the output voltage V of the detection circuit module is smaller than 0.71V, so that the second voltage threshold value is preset to be 0.71V.
When the state of the water inlet detection plate 4 is wet, a small amount of water drops are arranged on the water inlet detection plate 4, in this case, only part of adjacent positive electrode copper bars 6 and negative electrode copper bars 7 are connected by water 9, and also part of adjacent positive electrode copper bars and negative electrode copper bars are not connected by water 9, so that the resistance value of the resistor r of the water inlet detection plate 4 is larger than or equal to 1MΩ and smaller than or equal to 10MΩ in this case. Substituting the resistance value of the resistor r into an output voltage calculation formula of the detection circuit module, wherein the resistance value of the resistor r is larger than or equal to 1MΩ and smaller than or equal to 10MΩ, and calculating to obtain the voltage value of the output voltage V of the detection circuit module, wherein the voltage value is larger than or equal to 0.71V and smaller than or equal to 1.16V. Therefore, when the voltage value of the output voltage V of the detection circuit module is larger than or equal to the second voltage threshold value and smaller than or equal to the first voltage threshold value, the micro-processing unit determines that the water inlet state is moist.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The waterproof energy storage power supply is characterized by comprising a power supply body, a micro-processing unit and a detection circuit module, wherein the power supply body, the micro-processing unit and the detection circuit module are arranged in a waterproof shell;
the water inlet detection plate is vertically arranged on the side wall of the waterproof shell and consists of a PCB copper bar array, and adjacent PCB copper bars are connected by a PCB base material; the signal wire of the water inlet detection plate is led into the waterproof shell and is connected with the detection circuit module;
the detection circuit module is used for collecting the resistance of the water inlet detection plate and converting a resistance change signal into a voltage signal;
the micro-processing unit is used for collecting the voltage signal and judging the water inlet state of the water inlet detection plate according to the voltage signal so as to control the power supply of the output port to the load or control the electric energy output of the internal battery pack of the energy storage power supply.
2. The power supply of claim 1, wherein the detection circuit module comprises a first resistor, a second resistor, and a voltage source, a first end of the first resistor being connected to the voltage source, a second end of the first resistor being connected to a first end of the second resistor;
the second end of the first resistor is also connected with the micro-processing unit;
the first end of the second resistor is also connected with the first end of the water inlet detection plate, and the second end of the second resistor is connected with the second end of the water inlet detection plate.
3. The power supply of claim 2, wherein the detection circuit module further comprises a first filter circuit consisting of a first capacitor and a third resistor for filtering high frequency noise generated by the first resistor; the first end of the third resistor is connected with the first end of the water inlet detection plate, and the second end of the third resistor is connected with the first end of the first capacitor; the second end of the first capacitor is connected with the second end of the water inlet detection plate;
the second end of the third resistor is connected with the second end of the first resistor, and the second end of the first capacitor is also connected with the second end of the second resistor.
4. The power supply of claim 1, wherein the detection circuit module further comprises a second filter circuit consisting of a second capacitor and a fourth resistor for filtering noise of the detection circuit module;
the first end of the fourth resistor is connected with the first end of the second resistor, and the second end of the fourth resistor is connected with the first end of the second capacitor; the second end of the second capacitor is connected with the second end of the second resistor; the second end of the fourth resistor is also connected with the micro-processing unit.
5. The power supply of claim 2, wherein the detection circuit module further comprises a third capacitor; the third capacitor, the first resistor and the second resistor form a third filter circuit for filtering noise introduced by the voltage source;
the first end of the third capacitor is connected with the first end of the first resistor, the second end of the third capacitor is connected with the second end of the second resistor, and the second end of the third capacitor is also connected with the second end of the water inlet detection plate.
6. The power supply of claim 2, wherein the detection circuit module further comprises a transient diode for preventing static electricity generated by the PCB copper bar array from damaging a circuit;
the first end of the transient diode is connected with the first end of the water inlet detection plate, the second end of the transient diode is connected with the second end of the water inlet detection plate, the second end of the transient diode is also connected with the second end of the second resistor, and the second end of the transient diode is also grounded.
7. The power supply of claim 1, wherein the PCB substrate is plated with metallic gold for corrosion protection.
8. The power supply of claim 1, wherein the array of PCB copper bars comprises an array of positive copper bars connected by a top connecting bar and an array of negative copper bars connected by a bottom connecting bar, the array of positive copper bars and the array of negative copper bars being arranged in a nested arrangement;
the distance between the first end of the positive electrode copper bar and the bottom connecting bar is larger than a preset first distance, and the first end is the end, away from the positive electrode connecting bar, of the positive electrode copper bar.
9. A waterproof detection method applied to the micro-processing unit according to any one of claims 1 to 8, the method comprising:
collecting a voltage signal output by the detection circuit module; the voltage signal is obtained by converting the resistance change signal of the water inlet detection plate by the detection circuit module;
determining a water inlet state of the water inlet detection plate according to the magnitude relation between the voltage value included in the voltage signal and the first voltage threshold value and the second voltage threshold value;
when the water inlet state is determined to be not water inlet, controlling the output port to output electric energy;
when the water inlet state is determined to be water inlet, controlling the electric energy output of an internal battery pack of the energy storage power supply to be disconnected;
and when the water inlet state is determined to be moist, controlling the output port to stop outputting electric energy.
10. The method of claim 9, wherein determining the water intake state of the water intake detection plate based on the magnitude relationship of the voltage signal including the voltage value and the first and second voltage thresholds comprises:
when the voltage signal comprises a voltage value larger than the first voltage threshold value, the micro-processing unit determines that the water inlet state is not water inlet;
when the voltage signal comprises a voltage value smaller than a second voltage threshold value, the micro-processing unit determines that the water inlet state is water inlet;
the microprocessor unit determines that the water inlet state is humid when the voltage signal includes a voltage value greater than or equal to the second voltage threshold and less than or equal to the first voltage threshold.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310566846.0A CN116632970A (en) | 2023-05-18 | 2023-05-18 | Waterproof energy storage power supply and waterproof detection method |
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| CN202310566846.0A CN116632970A (en) | 2023-05-18 | 2023-05-18 | Waterproof energy storage power supply and waterproof detection method |
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| CN202310566846.0A Pending CN116632970A (en) | 2023-05-18 | 2023-05-18 | Waterproof energy storage power supply and waterproof detection method |
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